init commit

.gitignore

@@ -0,0 +1,3 @@
+dist/
+http-server-status
+.idea/

.goreleaser.yml

@@ -0,0 +1,30 @@
+# This is an example .goreleaser.yml file with some sane defaults.
+# Make sure to check the documentation at http://goreleaser.com
+before:
+  hooks:
+    # You may remove this if you don't use go modules.
+    - go mod tidy
+    # you may remove this if you don't need go generate
+    - go generate ./...
+builds:
+  - env:
+      - CGO_ENABLED=0
+    goos:
+      - linux
+      #- windows
+      #- darwin
+archives:
+  - replacements:
+      darwin: Darwin
+      386: i386
+      amd64: x86_64
+checksum:
+  name_template: 'checksums.txt'
+snapshot:
+  name_template: "{{ .Tag }}-next"
+changelog:
+  sort: asc
+  filters:
+    exclude:
+      - '^docs:'
+      - '^test:'

go.mod

@@ -0,0 +1,15 @@
+module http-server-status
+
+go 1.17
+
+require (
+	github.com/mackerelio/go-osstat v0.2.0
+	github.com/rs/zerolog v1.25.0
+	github.com/shirou/gopsutil v3.21.8+incompatible
+)
+
+require (
+	github.com/StackExchange/wmi v1.2.1 // indirect
+	github.com/go-ole/go-ole v1.2.5 // indirect
+	golang.org/x/sys v0.0.0-20210915083310-ed5796bab164 // indirect
+)

go.sum

@@ -0,0 +1,14 @@
+github.com/StackExchange/wmi v1.2.1 h1:VIkavFPXSjcnS+O8yTq7NI32k0R5Aj+v39y29VYDOSA=
+github.com/StackExchange/wmi v1.2.1/go.mod h1:rcmrprowKIVzvc+NUiLncP2uuArMWLCbu9SBzvHz7e8=
+github.com/go-ole/go-ole v1.2.5 h1:t4MGB5xEDZvXI+0rMjjsfBsD7yAgp/s9ZDkL1JndXwY=
+github.com/go-ole/go-ole v1.2.5/go.mod h1:pprOEPIfldk/42T2oK7lQ4v4JSDwmV0As9GaiUsvbm0=
+github.com/mackerelio/go-osstat v0.2.0 h1:UVn9Am/OOj2Ig0LNNHLqiHeXsZWmMNcMPZ3h+z/8+h8=
+github.com/mackerelio/go-osstat v0.2.0/go.mod h1:UzRL8dMCCTqG5WdRtsxbuljMpZt9PCAGXqxPst5QtaY=
+github.com/rs/zerolog v1.25.0 h1:Rj7XygbUHKUlDPcVdoLyR91fJBsduXj5fRxyqIQj/II=
+github.com/rs/zerolog v1.25.0/go.mod h1:7KHcEGe0QZPOm2IE4Kpb5rTh6n1h2hIgS5OOnu1rUaI=
+github.com/shirou/gopsutil v3.21.8+incompatible h1:sh0foI8tMRlCidUJR+KzqWYWxrkuuPIGiO6Vp+KXdCU=
+github.com/shirou/gopsutil v3.21.8+incompatible/go.mod h1:5b4v6he4MtMOwMlS0TUMTu2PcXUg8+E1lC7eC3UO/RA=
+golang.org/x/sys v0.0.0-20190916202348-b4ddaad3f8a3/go.mod h1:h1NjWce9XRLGQEsW7wpKNCjG9DtNlClVuFLEZdDNbEs=
+golang.org/x/sys v0.0.0-20210113181707-4bcb84eeeb78/go.mod h1:h1NjWce9XRLGQEsW7wpKNCjG9DtNlClVuFLEZdDNbEs=
+golang.org/x/sys v0.0.0-20210915083310-ed5796bab164 h1:7ZDGnxgHAMw7thfC5bEos0RDAccZKxioiWBhfIe+tvw=
+golang.org/x/sys v0.0.0-20210915083310-ed5796bab164/go.mod h1:oPkhp1MJrh7nUepCBck5+mAzfO9JrbApNNgaTdGDITg=

internal/pkg/checks/hdd.go

@@ -0,0 +1,25 @@
+package checks
+
+import "github.com/shirou/gopsutil/disk"
+
+type HDD struct {
+
+}
+
+func (h HDD) Execute() (ok bool, err error) {
+	parts, _ := disk.Partitions(true)
+
+	for _, p := range parts {
+		device := p.Mountpoint
+		s, _ := disk.Usage(device)
+		if s.UsedPercent > 80 {
+			return false, nil
+		}
+	}
+
+	return true, nil
+}
+
+func (h HDD) Name() string {
+	return "Disc space"
+}

internal/pkg/checks/interfaces.go

@@ -0,0 +1,6 @@
+package checks
+
+type Check interface {
+	Execute() (ok bool, err error)
+	Name() string
+}

internal/pkg/checks/load.go

@@ -0,0 +1,30 @@
+package checks
+
+import (
+	"github.com/mackerelio/go-osstat/loadavg"
+)
+
+type Load struct {
+
+}
+
+func (h Load) Execute() (ok bool, err error) {
+	load, err := loadavg.Get()
+	if load.Loadavg1 > 10 {
+		return false, nil
+	}
+
+	if load.Loadavg5 > 8 {
+		return false, nil
+	}
+
+	if load.Loadavg1 > 5 {
+		return false, nil
+	}
+
+	return true, nil
+}
+
+func (h Load) Name() string {
+	return "System Load"
+}

internal/pkg/checks/memory.go

@@ -0,0 +1,23 @@
+package checks
+
+import (
+	"github.com/mackerelio/go-osstat/memory"
+)
+
+type Memory struct {
+
+}
+
+func (h Memory) Execute() (ok bool, err error) {
+	memory, err := memory.Get()
+	p := float64(100) / float64(memory.Total) * float64(memory.Used)
+	if p > 80 {
+		return false, nil
+	}
+
+	return true, nil
+}
+
+func (h Memory) Name() string {
+	return "Memory usage"
+}

main.go

@@ -0,0 +1,56 @@
+package main
+
+import (
+	"encoding/json"
+	"github.com/rs/zerolog/log"
+	checks "http-server-status/internal/pkg/checks"
+	"net/http"
+	"sync"
+)
+
+var checkList []checks.Check
+
+func init()  {
+	checkList = append(checkList, checks.HDD{}, checks.Memory{}, checks.Load{})
+}
+
+func main() {
+
+	http.HandleFunc("/", handler)
+	err := http.ListenAndServe(":3003", nil)
+	log.Fatal().Err(err).Msg("Shutdown")
+}
+
+func handler(w http.ResponseWriter, r *http.Request) {
+	res, gloableRes := checkSystem()
+	resJson, err := json.Marshal(res)
+	if err != nil {
+		log.Fatal().Err(err).Msg("Check Error")
+	}
+	if gloableRes {
+		w.Write(resJson)
+		return
+	}
+	http.Error(w, string(resJson), http.StatusInternalServerError)
+
+}
+
+func checkSystem() (map[string]bool, bool) {
+	globaleResult := true
+	wg := sync.WaitGroup{}
+	res := make(map[string]bool)
+	for _, c := range checkList {
+		wg.Add(1)
+		go func(check checks.Check) {
+			defer wg.Done()
+			s, _ := check.Execute()
+			if s == false {
+				globaleResult = false
+			}
+			res[check.Name()] = s
+		}(c)
+	}
+	wg.Wait()
+
+	return res, globaleResult
+}

vendor/github.com/StackExchange/wmi/LICENSE

@@ -0,0 +1,20 @@
+The MIT License (MIT)
+
+Copyright (c) 2013 Stack Exchange
+
+Permission is hereby granted, free of charge, to any person obtaining a copy of
+this software and associated documentation files (the "Software"), to deal in
+the Software without restriction, including without limitation the rights to
+use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of
+the Software, and to permit persons to whom the Software is furnished to do so,
+subject to the following conditions:
+
+The above copyright notice and this permission notice shall be included in all
+copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS
+FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR
+COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER
+IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
+CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.

vendor/github.com/StackExchange/wmi/README.md

@@ -0,0 +1,13 @@
+wmi
+===
+
+Package wmi provides a WQL interface to Windows WMI.
+
+Note: It interfaces with WMI on the local machine, therefore it only runs on Windows.
+
+---
+
+NOTE: This project is no longer being actively maintained.  If you would like
+to become its new owner, please contact tlimoncelli at stack over flow dot com.
+
+---

vendor/github.com/StackExchange/wmi/swbemservices.go

@@ -0,0 +1,260 @@
+// +build windows
+
+package wmi
+
+import (
+	"fmt"
+	"reflect"
+	"runtime"
+	"sync"
+
+	"github.com/go-ole/go-ole"
+	"github.com/go-ole/go-ole/oleutil"
+)
+
+// SWbemServices is used to access wmi. See https://msdn.microsoft.com/en-us/library/aa393719(v=vs.85).aspx
+type SWbemServices struct {
+	//TODO: track namespace. Not sure if we can re connect to a different namespace using the same instance
+	cWMIClient            *Client //This could also be an embedded struct, but then we would need to branch on Client vs SWbemServices in the Query method
+	sWbemLocatorIUnknown  *ole.IUnknown
+	sWbemLocatorIDispatch *ole.IDispatch
+	queries               chan *queryRequest
+	closeError            chan error
+	lQueryorClose         sync.Mutex
+}
+
+type queryRequest struct {
+	query    string
+	dst      interface{}
+	args     []interface{}
+	finished chan error
+}
+
+// InitializeSWbemServices will return a new SWbemServices object that can be used to query WMI
+func InitializeSWbemServices(c *Client, connectServerArgs ...interface{}) (*SWbemServices, error) {
+	//fmt.Println("InitializeSWbemServices: Starting")
+	//TODO: implement connectServerArgs as optional argument for init with connectServer call
+	s := new(SWbemServices)
+	s.cWMIClient = c
+	s.queries = make(chan *queryRequest)
+	initError := make(chan error)
+	go s.process(initError)
+
+	err, ok := <-initError
+	if ok {
+		return nil, err //Send error to caller
+	}
+	//fmt.Println("InitializeSWbemServices: Finished")
+	return s, nil
+}
+
+// Close will clear and release all of the SWbemServices resources
+func (s *SWbemServices) Close() error {
+	s.lQueryorClose.Lock()
+	if s == nil || s.sWbemLocatorIDispatch == nil {
+		s.lQueryorClose.Unlock()
+		return fmt.Errorf("SWbemServices is not Initialized")
+	}
+	if s.queries == nil {
+		s.lQueryorClose.Unlock()
+		return fmt.Errorf("SWbemServices has been closed")
+	}
+	//fmt.Println("Close: sending close request")
+	var result error
+	ce := make(chan error)
+	s.closeError = ce //Race condition if multiple callers to close. May need to lock here
+	close(s.queries)  //Tell background to shut things down
+	s.lQueryorClose.Unlock()
+	err, ok := <-ce
+	if ok {
+		result = err
+	}
+	//fmt.Println("Close: finished")
+	return result
+}
+
+func (s *SWbemServices) process(initError chan error) {
+	//fmt.Println("process: starting background thread initialization")
+	//All OLE/WMI calls must happen on the same initialized thead, so lock this goroutine
+	runtime.LockOSThread()
+	defer runtime.UnlockOSThread()
+
+	err := ole.CoInitializeEx(0, ole.COINIT_MULTITHREADED)
+	if err != nil {
+		oleCode := err.(*ole.OleError).Code()
+		if oleCode != ole.S_OK && oleCode != S_FALSE {
+			initError <- fmt.Errorf("ole.CoInitializeEx error: %v", err)
+			return
+		}
+	}
+	defer ole.CoUninitialize()
+
+	unknown, err := oleutil.CreateObject("WbemScripting.SWbemLocator")
+	if err != nil {
+		initError <- fmt.Errorf("CreateObject SWbemLocator error: %v", err)
+		return
+	} else if unknown == nil {
+		initError <- ErrNilCreateObject
+		return
+	}
+	defer unknown.Release()
+	s.sWbemLocatorIUnknown = unknown
+
+	dispatch, err := s.sWbemLocatorIUnknown.QueryInterface(ole.IID_IDispatch)
+	if err != nil {
+		initError <- fmt.Errorf("SWbemLocator QueryInterface error: %v", err)
+		return
+	}
+	defer dispatch.Release()
+	s.sWbemLocatorIDispatch = dispatch
+
+	// we can't do the ConnectServer call outside the loop unless we find a way to track and re-init the connectServerArgs
+	//fmt.Println("process: initialized. closing initError")
+	close(initError)
+	//fmt.Println("process: waiting for queries")
+	for q := range s.queries {
+		//fmt.Printf("process: new query: len(query)=%d\n", len(q.query))
+		errQuery := s.queryBackground(q)
+		//fmt.Println("process: s.queryBackground finished")
+		if errQuery != nil {
+			q.finished <- errQuery
+		}
+		close(q.finished)
+	}
+	//fmt.Println("process: queries channel closed")
+	s.queries = nil //set channel to nil so we know it is closed
+	//TODO: I think the Release/Clear calls can panic if things are in a bad state.
+	//TODO: May need to recover from panics and send error to method caller instead.
+	close(s.closeError)
+}
+
+// Query runs the WQL query using a SWbemServices instance and appends the values to dst.
+//
+// dst must have type *[]S or *[]*S, for some struct type S. Fields selected in
+// the query must have the same name in dst. Supported types are all signed and
+// unsigned integers, time.Time, string, bool, or a pointer to one of those.
+// Array types are not supported.
+//
+// By default, the local machine and default namespace are used. These can be
+// changed using connectServerArgs. See
+// http://msdn.microsoft.com/en-us/library/aa393720.aspx for details.
+func (s *SWbemServices) Query(query string, dst interface{}, connectServerArgs ...interface{}) error {
+	s.lQueryorClose.Lock()
+	if s == nil || s.sWbemLocatorIDispatch == nil {
+		s.lQueryorClose.Unlock()
+		return fmt.Errorf("SWbemServices is not Initialized")
+	}
+	if s.queries == nil {
+		s.lQueryorClose.Unlock()
+		return fmt.Errorf("SWbemServices has been closed")
+	}
+
+	//fmt.Println("Query: Sending query request")
+	qr := queryRequest{
+		query:    query,
+		dst:      dst,
+		args:     connectServerArgs,
+		finished: make(chan error),
+	}
+	s.queries <- &qr
+	s.lQueryorClose.Unlock()
+	err, ok := <-qr.finished
+	if ok {
+		//fmt.Println("Query: Finished with error")
+		return err //Send error to caller
+	}
+	//fmt.Println("Query: Finished")
+	return nil
+}
+
+func (s *SWbemServices) queryBackground(q *queryRequest) error {
+	if s == nil || s.sWbemLocatorIDispatch == nil {
+		return fmt.Errorf("SWbemServices is not Initialized")
+	}
+	wmi := s.sWbemLocatorIDispatch //Should just rename in the code, but this will help as we break things apart
+	//fmt.Println("queryBackground: Starting")
+
+	dv := reflect.ValueOf(q.dst)
+	if dv.Kind() != reflect.Ptr || dv.IsNil() {
+		return ErrInvalidEntityType
+	}
+	dv = dv.Elem()
+	mat, elemType := checkMultiArg(dv)
+	if mat == multiArgTypeInvalid {
+		return ErrInvalidEntityType
+	}
+
+	// service is a SWbemServices
+	serviceRaw, err := oleutil.CallMethod(wmi, "ConnectServer", q.args...)
+	if err != nil {
+		return err
+	}
+	service := serviceRaw.ToIDispatch()
+	defer serviceRaw.Clear()
+
+	// result is a SWBemObjectSet
+	resultRaw, err := oleutil.CallMethod(service, "ExecQuery", q.query)
+	if err != nil {
+		return err
+	}
+	result := resultRaw.ToIDispatch()
+	defer resultRaw.Clear()
+
+	count, err := oleInt64(result, "Count")
+	if err != nil {
+		return err
+	}
+
+	enumProperty, err := result.GetProperty("_NewEnum")
+	if err != nil {
+		return err
+	}
+	defer enumProperty.Clear()
+
+	enum, err := enumProperty.ToIUnknown().IEnumVARIANT(ole.IID_IEnumVariant)
+	if err != nil {
+		return err
+	}
+	if enum == nil {
+		return fmt.Errorf("can't get IEnumVARIANT, enum is nil")
+	}
+	defer enum.Release()
+
+	// Initialize a slice with Count capacity
+	dv.Set(reflect.MakeSlice(dv.Type(), 0, int(count)))
+
+	var errFieldMismatch error
+	for itemRaw, length, err := enum.Next(1); length > 0; itemRaw, length, err = enum.Next(1) {
+		if err != nil {
+			return err
+		}
+
+		err := func() error {
+			// item is a SWbemObject, but really a Win32_Process
+			item := itemRaw.ToIDispatch()
+			defer item.Release()
+
+			ev := reflect.New(elemType)
+			if err = s.cWMIClient.loadEntity(ev.Interface(), item); err != nil {
+				if _, ok := err.(*ErrFieldMismatch); ok {
+					// We continue loading entities even in the face of field mismatch errors.
+					// If we encounter any other error, that other error is returned. Otherwise,
+					// an ErrFieldMismatch is returned.
+					errFieldMismatch = err
+				} else {
+					return err
+				}
+			}
+			if mat != multiArgTypeStructPtr {
+				ev = ev.Elem()
+			}
+			dv.Set(reflect.Append(dv, ev))
+			return nil
+		}()
+		if err != nil {
+			return err
+		}
+	}
+	//fmt.Println("queryBackground: Finished")
+	return errFieldMismatch
+}

vendor/github.com/StackExchange/wmi/wmi.go

@@ -0,0 +1,590 @@
+// +build windows
+
+/*
+Package wmi provides a WQL interface for WMI on Windows.
+
+Example code to print names of running processes:
+
+	type Win32_Process struct {
+		Name string
+	}
+
+	func main() {
+		var dst []Win32_Process
+		q := wmi.CreateQuery(&dst, "")
+		err := wmi.Query(q, &dst)
+		if err != nil {
+			log.Fatal(err)
+		}
+		for i, v := range dst {
+			println(i, v.Name)
+		}
+	}
+
+*/
+package wmi
+
+import (
+	"bytes"
+	"errors"
+	"fmt"
+	"log"
+	"os"
+	"reflect"
+	"runtime"
+	"strconv"
+	"strings"
+	"sync"
+	"time"
+
+	"github.com/go-ole/go-ole"
+	"github.com/go-ole/go-ole/oleutil"
+)
+
+var l = log.New(os.Stdout, "", log.LstdFlags)
+
+var (
+	ErrInvalidEntityType = errors.New("wmi: invalid entity type")
+	// ErrNilCreateObject is the error returned if CreateObject returns nil even
+	// if the error was nil.
+	ErrNilCreateObject = errors.New("wmi: create object returned nil")
+	lock               sync.Mutex
+)
+
+// S_FALSE is returned by CoInitializeEx if it was already called on this thread.
+const S_FALSE = 0x00000001
+
+// QueryNamespace invokes Query with the given namespace on the local machine.
+func QueryNamespace(query string, dst interface{}, namespace string) error {
+	return Query(query, dst, nil, namespace)
+}
+
+// Query runs the WQL query and appends the values to dst.
+//
+// dst must have type *[]S or *[]*S, for some struct type S. Fields selected in
+// the query must have the same name in dst. Supported types are all signed and
+// unsigned integers, time.Time, string, bool, or a pointer to one of those.
+// Array types are not supported.
+//
+// By default, the local machine and default namespace are used. These can be
+// changed using connectServerArgs. See
+// https://docs.microsoft.com/en-us/windows/desktop/WmiSdk/swbemlocator-connectserver
+// for details.
+//
+// Query is a wrapper around DefaultClient.Query.
+func Query(query string, dst interface{}, connectServerArgs ...interface{}) error {
+	if DefaultClient.SWbemServicesClient == nil {
+		return DefaultClient.Query(query, dst, connectServerArgs...)
+	}
+	return DefaultClient.SWbemServicesClient.Query(query, dst, connectServerArgs...)
+}
+
+// CallMethod calls a method named methodName on an instance of the class named
+// className, with the given params.
+//
+// CallMethod is a wrapper around DefaultClient.CallMethod.
+func CallMethod(connectServerArgs []interface{}, className, methodName string, params []interface{}) (int32, error) {
+	return DefaultClient.CallMethod(connectServerArgs, className, methodName, params)
+}
+
+// A Client is an WMI query client.
+//
+// Its zero value (DefaultClient) is a usable client.
+type Client struct {
+	// NonePtrZero specifies if nil values for fields which aren't pointers
+	// should be returned as the field types zero value.
+	//
+	// Setting this to true allows stucts without pointer fields to be used
+	// without the risk failure should a nil value returned from WMI.
+	NonePtrZero bool
+
+	// PtrNil specifies if nil values for pointer fields should be returned
+	// as nil.
+	//
+	// Setting this to true will set pointer fields to nil where WMI
+	// returned nil, otherwise the types zero value will be returned.
+	PtrNil bool
+
+	// AllowMissingFields specifies that struct fields not present in the
+	// query result should not result in an error.
+	//
+	// Setting this to true allows custom queries to be used with full
+	// struct definitions instead of having to define multiple structs.
+	AllowMissingFields bool
+
+	// SWbemServiceClient is an optional SWbemServices object that can be
+	// initialized and then reused across multiple queries. If it is null
+	// then the method will initialize a new temporary client each time.
+	SWbemServicesClient *SWbemServices
+}
+
+// DefaultClient is the default Client and is used by Query, QueryNamespace, and CallMethod.
+var DefaultClient = &Client{}
+
+// coinitService coinitializes WMI service. If no error is returned, a cleanup function
+// is returned which must be executed (usually deferred) to clean up allocated resources.
+func (c *Client) coinitService(connectServerArgs ...interface{}) (*ole.IDispatch, func(), error) {
+	var unknown *ole.IUnknown
+	var wmi *ole.IDispatch
+	var serviceRaw *ole.VARIANT
+
+	// be sure teardown happens in the reverse
+	// order from that which they were created
+	deferFn := func() {
+		if serviceRaw != nil {
+			serviceRaw.Clear()
+		}
+		if wmi != nil {
+			wmi.Release()
+		}
+		if unknown != nil {
+			unknown.Release()
+		}
+		ole.CoUninitialize()
+	}
+
+	// if we error'ed here, clean up immediately
+	var err error
+	defer func() {
+		if err != nil {
+			deferFn()
+		}
+	}()
+
+	err = ole.CoInitializeEx(0, ole.COINIT_MULTITHREADED)
+	if err != nil {
+		oleCode := err.(*ole.OleError).Code()
+		if oleCode != ole.S_OK && oleCode != S_FALSE {
+			return nil, nil, err
+		}
+	}
+
+	unknown, err = oleutil.CreateObject("WbemScripting.SWbemLocator")
+	if err != nil {
+		return nil, nil, err
+	} else if unknown == nil {
+		return nil, nil, ErrNilCreateObject
+	}
+
+	wmi, err = unknown.QueryInterface(ole.IID_IDispatch)
+	if err != nil {
+		return nil, nil, err
+	}
+
+	// service is a SWbemServices
+	serviceRaw, err = oleutil.CallMethod(wmi, "ConnectServer", connectServerArgs...)
+	if err != nil {
+		return nil, nil, err
+	}
+
+	return serviceRaw.ToIDispatch(), deferFn, nil
+}
+
+// CallMethod calls a WMI method named methodName on an instance
+// of the class named className. It passes in the arguments given
+// in params. Use connectServerArgs to customize the machine and
+// namespace; by default, the local machine and default namespace
+// are used. See
+// https://docs.microsoft.com/en-us/windows/desktop/WmiSdk/swbemlocator-connectserver
+// for details.
+func (c *Client) CallMethod(connectServerArgs []interface{}, className, methodName string, params []interface{}) (int32, error) {
+	service, cleanup, err := c.coinitService(connectServerArgs...)
+	if err != nil {
+		return 0, fmt.Errorf("coinit: %v", err)
+	}
+	defer cleanup()
+
+	// Get class
+	classRaw, err := oleutil.CallMethod(service, "Get", className)
+	if err != nil {
+		return 0, fmt.Errorf("CallMethod Get class %s: %v", className, err)
+	}
+	class := classRaw.ToIDispatch()
+	defer classRaw.Clear()
+
+	// Run method
+	resultRaw, err := oleutil.CallMethod(class, methodName, params...)
+	if err != nil {
+		return 0, fmt.Errorf("CallMethod %s.%s: %v", className, methodName, err)
+	}
+	resultInt, ok := resultRaw.Value().(int32)
+	if !ok {
+		return 0, fmt.Errorf("return value was not an int32: %v (%T)", resultRaw, resultRaw)
+	}
+
+	return resultInt, nil
+}
+
+// Query runs the WQL query and appends the values to dst.
+//
+// dst must have type *[]S or *[]*S, for some struct type S. Fields selected in
+// the query must have the same name in dst. Supported types are all signed and
+// unsigned integers, time.Time, string, bool, or a pointer to one of those.
+// Array types are not supported.
+//
+// By default, the local machine and default namespace are used. These can be
+// changed using connectServerArgs. See
+// https://docs.microsoft.com/en-us/windows/desktop/WmiSdk/swbemlocator-connectserver
+// for details.
+func (c *Client) Query(query string, dst interface{}, connectServerArgs ...interface{}) error {
+	dv := reflect.ValueOf(dst)
+	if dv.Kind() != reflect.Ptr || dv.IsNil() {
+		return ErrInvalidEntityType
+	}
+	dv = dv.Elem()
+	mat, elemType := checkMultiArg(dv)
+	if mat == multiArgTypeInvalid {
+		return ErrInvalidEntityType
+	}
+
+	lock.Lock()
+	defer lock.Unlock()
+	runtime.LockOSThread()
+	defer runtime.UnlockOSThread()
+
+	service, cleanup, err := c.coinitService(connectServerArgs...)
+	if err != nil {
+		return err
+	}
+	defer cleanup()
+
+	// result is a SWBemObjectSet
+	resultRaw, err := oleutil.CallMethod(service, "ExecQuery", query)
+	if err != nil {
+		return err
+	}
+	result := resultRaw.ToIDispatch()
+	defer resultRaw.Clear()
+
+	count, err := oleInt64(result, "Count")
+	if err != nil {
+		return err
+	}
+
+	enumProperty, err := result.GetProperty("_NewEnum")
+	if err != nil {
+		return err
+	}
+	defer enumProperty.Clear()
+
+	enum, err := enumProperty.ToIUnknown().IEnumVARIANT(ole.IID_IEnumVariant)
+	if err != nil {
+		return err
+	}
+	if enum == nil {
+		return fmt.Errorf("can't get IEnumVARIANT, enum is nil")
+	}
+	defer enum.Release()
+
+	// Initialize a slice with Count capacity
+	dv.Set(reflect.MakeSlice(dv.Type(), 0, int(count)))
+
+	var errFieldMismatch error
+	for itemRaw, length, err := enum.Next(1); length > 0; itemRaw, length, err = enum.Next(1) {
+		if err != nil {
+			return err
+		}
+
+		err := func() error {
+			// item is a SWbemObject, but really a Win32_Process
+			item := itemRaw.ToIDispatch()
+			defer item.Release()
+
+			ev := reflect.New(elemType)
+			if err = c.loadEntity(ev.Interface(), item); err != nil {
+				if _, ok := err.(*ErrFieldMismatch); ok {
+					// We continue loading entities even in the face of field mismatch errors.
+					// If we encounter any other error, that other error is returned. Otherwise,
+					// an ErrFieldMismatch is returned.
+					errFieldMismatch = err
+				} else {
+					return err
+				}
+			}
+			if mat != multiArgTypeStructPtr {
+				ev = ev.Elem()
+			}
+			dv.Set(reflect.Append(dv, ev))
+			return nil
+		}()
+		if err != nil {
+			return err
+		}
+	}
+	return errFieldMismatch
+}
+
+// ErrFieldMismatch is returned when a field is to be loaded into a different
+// type than the one it was stored from, or when a field is missing or
+// unexported in the destination struct.
+// StructType is the type of the struct pointed to by the destination argument.
+type ErrFieldMismatch struct {
+	StructType reflect.Type
+	FieldName  string
+	Reason     string
+}
+
+func (e *ErrFieldMismatch) Error() string {
+	return fmt.Sprintf("wmi: cannot load field %q into a %q: %s",
+		e.FieldName, e.StructType, e.Reason)
+}
+
+var timeType = reflect.TypeOf(time.Time{})
+
+// loadEntity loads a SWbemObject into a struct pointer.
+func (c *Client) loadEntity(dst interface{}, src *ole.IDispatch) (errFieldMismatch error) {
+	v := reflect.ValueOf(dst).Elem()
+	for i := 0; i < v.NumField(); i++ {
+		f := v.Field(i)
+		of := f
+		isPtr := f.Kind() == reflect.Ptr
+		if isPtr {
+			ptr := reflect.New(f.Type().Elem())
+			f.Set(ptr)
+			f = f.Elem()
+		}
+		n := v.Type().Field(i).Name
+		if n[0] < 'A' || n[0] > 'Z' {
+			continue
+		}
+		if !f.CanSet() {
+			return &ErrFieldMismatch{
+				StructType: of.Type(),
+				FieldName:  n,
+				Reason:     "CanSet() is false",
+			}
+		}
+		prop, err := oleutil.GetProperty(src, n)
+		if err != nil {
+			if !c.AllowMissingFields {
+				errFieldMismatch = &ErrFieldMismatch{
+					StructType: of.Type(),
+					FieldName:  n,
+					Reason:     "no such struct field",
+				}
+			}
+			continue
+		}
+		defer prop.Clear()
+
+		if prop.VT == 0x1 { //VT_NULL
+			continue
+		}
+
+		switch val := prop.Value().(type) {
+		case int8, int16, int32, int64, int:
+			v := reflect.ValueOf(val).Int()
+			switch f.Kind() {
+			case reflect.Int, reflect.Int8, reflect.Int16, reflect.Int32, reflect.Int64:
+				f.SetInt(v)
+			case reflect.Uint, reflect.Uint8, reflect.Uint16, reflect.Uint32, reflect.Uint64:
+				f.SetUint(uint64(v))
+			default:
+				return &ErrFieldMismatch{
+					StructType: of.Type(),
+					FieldName:  n,
+					Reason:     "not an integer class",
+				}
+			}
+		case uint8, uint16, uint32, uint64:
+			v := reflect.ValueOf(val).Uint()
+			switch f.Kind() {
+			case reflect.Int, reflect.Int8, reflect.Int16, reflect.Int32, reflect.Int64:
+				f.SetInt(int64(v))
+			case reflect.Uint, reflect.Uint8, reflect.Uint16, reflect.Uint32, reflect.Uint64:
+				f.SetUint(v)
+			default:
+				return &ErrFieldMismatch{
+					StructType: of.Type(),
+					FieldName:  n,
+					Reason:     "not an integer class",
+				}
+			}
+		case string:
+			switch f.Kind() {
+			case reflect.String:
+				f.SetString(val)
+			case reflect.Int, reflect.Int8, reflect.Int16, reflect.Int32, reflect.Int64:
+				iv, err := strconv.ParseInt(val, 10, 64)
+				if err != nil {
+					return err
+				}
+				f.SetInt(iv)
+			case reflect.Uint, reflect.Uint8, reflect.Uint16, reflect.Uint32, reflect.Uint64:
+				uv, err := strconv.ParseUint(val, 10, 64)
+				if err != nil {
+					return err
+				}
+				f.SetUint(uv)
+			case reflect.Struct:
+				switch f.Type() {
+				case timeType:
+					if len(val) == 25 {
+						mins, err := strconv.Atoi(val[22:])
+						if err != nil {
+							return err
+						}
+						val = val[:22] + fmt.Sprintf("%02d%02d", mins/60, mins%60)
+					}
+					t, err := time.Parse("20060102150405.000000-0700", val)
+					if err != nil {
+						return err
+					}
+					f.Set(reflect.ValueOf(t))
+				}
+			}
+		case bool:
+			switch f.Kind() {
+			case reflect.Bool:
+				f.SetBool(val)
+			default:
+				return &ErrFieldMismatch{
+					StructType: of.Type(),
+					FieldName:  n,
+					Reason:     "not a bool",
+				}
+			}
+		case float32:
+			switch f.Kind() {
+			case reflect.Float32:
+				f.SetFloat(float64(val))
+			default:
+				return &ErrFieldMismatch{
+					StructType: of.Type(),
+					FieldName:  n,
+					Reason:     "not a Float32",
+				}
+			}
+		default:
+			if f.Kind() == reflect.Slice {
+				switch f.Type().Elem().Kind() {
+				case reflect.String:
+					safeArray := prop.ToArray()
+					if safeArray != nil {
+						arr := safeArray.ToValueArray()
+						fArr := reflect.MakeSlice(f.Type(), len(arr), len(arr))
+						for i, v := range arr {
+							s := fArr.Index(i)
+							s.SetString(v.(string))
+						}
+						f.Set(fArr)
+					}
+				case reflect.Uint8, reflect.Uint16, reflect.Uint32, reflect.Uint64, reflect.Uint:
+					safeArray := prop.ToArray()
+					if safeArray != nil {
+						arr := safeArray.ToValueArray()
+						fArr := reflect.MakeSlice(f.Type(), len(arr), len(arr))
+						for i, v := range arr {
+							s := fArr.Index(i)
+							s.SetUint(reflect.ValueOf(v).Uint())
+						}
+						f.Set(fArr)
+					}
+				case reflect.Int8, reflect.Int16, reflect.Int32, reflect.Int64, reflect.Int:
+					safeArray := prop.ToArray()
+					if safeArray != nil {
+						arr := safeArray.ToValueArray()
+						fArr := reflect.MakeSlice(f.Type(), len(arr), len(arr))
+						for i, v := range arr {
+							s := fArr.Index(i)
+							s.SetInt(reflect.ValueOf(v).Int())
+						}
+						f.Set(fArr)
+					}
+				default:
+					return &ErrFieldMismatch{
+						StructType: of.Type(),
+						FieldName:  n,
+						Reason:     fmt.Sprintf("unsupported slice type (%T)", val),
+					}
+				}
+			} else {
+				typeof := reflect.TypeOf(val)
+				if typeof == nil && (isPtr || c.NonePtrZero) {
+					if (isPtr && c.PtrNil) || (!isPtr && c.NonePtrZero) {
+						of.Set(reflect.Zero(of.Type()))
+					}
+					break
+				}
+				return &ErrFieldMismatch{
+					StructType: of.Type(),
+					FieldName:  n,
+					Reason:     fmt.Sprintf("unsupported type (%T)", val),
+				}
+			}
+		}
+	}
+	return errFieldMismatch
+}
+
+type multiArgType int
+
+const (
+	multiArgTypeInvalid multiArgType = iota
+	multiArgTypeStruct
+	multiArgTypeStructPtr
+)
+
+// checkMultiArg checks that v has type []S, []*S for some struct type S.
+//
+// It returns what category the slice's elements are, and the reflect.Type
+// that represents S.
+func checkMultiArg(v reflect.Value) (m multiArgType, elemType reflect.Type) {
+	if v.Kind() != reflect.Slice {
+		return multiArgTypeInvalid, nil
+	}
+	elemType = v.Type().Elem()
+	switch elemType.Kind() {
+	case reflect.Struct:
+		return multiArgTypeStruct, elemType
+	case reflect.Ptr:
+		elemType = elemType.Elem()
+		if elemType.Kind() == reflect.Struct {
+			return multiArgTypeStructPtr, elemType
+		}
+	}
+	return multiArgTypeInvalid, nil
+}
+
+func oleInt64(item *ole.IDispatch, prop string) (int64, error) {
+	v, err := oleutil.GetProperty(item, prop)
+	if err != nil {
+		return 0, err
+	}
+	defer v.Clear()
+
+	i := int64(v.Val)
+	return i, nil
+}
+
+// CreateQuery returns a WQL query string that queries all columns of src. where
+// is an optional string that is appended to the query, to be used with WHERE
+// clauses. In such a case, the "WHERE" string should appear at the beginning.
+// The wmi class is obtained by the name of the type. You can pass a optional
+// class throught the variadic class parameter which is useful for anonymous
+// structs.
+func CreateQuery(src interface{}, where string, class ...string) string {
+	var b bytes.Buffer
+	b.WriteString("SELECT ")
+	s := reflect.Indirect(reflect.ValueOf(src))
+	t := s.Type()
+	if s.Kind() == reflect.Slice {
+		t = t.Elem()
+	}
+	if t.Kind() != reflect.Struct {
+		return ""
+	}
+	var fields []string
+	for i := 0; i < t.NumField(); i++ {
+		fields = append(fields, t.Field(i).Name)
+	}
+	b.WriteString(strings.Join(fields, ", "))
+	b.WriteString(" FROM ")
+	if len(class) > 0 {
+		b.WriteString(class[0])
+	} else {
+		b.WriteString(t.Name())
+	}
+	b.WriteString(" " + where)
+	return b.String()
+}

vendor/github.com/go-ole/go-ole/.travis.yml

@@ -0,0 +1,8 @@
+language: go
+sudo: false
+
+go:
+  - 1.9.x
+  - 1.10.x
+  - 1.11.x
+  - tip

vendor/github.com/go-ole/go-ole/ChangeLog.md

@@ -0,0 +1,49 @@
+# Version 1.x.x
+
+* **Add more test cases and reference new test COM server project.** (Placeholder for future additions)
+
+# Version 1.2.0-alphaX
+
+**Minimum supported version is now Go 1.4. Go 1.1 support is deprecated, but should still build.**
+
+ * Added CI configuration for Travis-CI and AppVeyor.
+ * Added test InterfaceID and ClassID for the COM Test Server project.
+ * Added more inline documentation (#83).
+ * Added IEnumVARIANT implementation (#88).
+ * Added IEnumVARIANT test cases (#99, #100, #101).
+ * Added support for retrieving `time.Time` from VARIANT (#92).
+ * Added test case for IUnknown (#64).
+ * Added test case for IDispatch (#64).
+ * Added test cases for scalar variants (#64, #76).
+
+# Version 1.1.1
+
+ * Fixes for Linux build.
+ * Fixes for Windows build.
+
+# Version 1.1.0
+
+The change to provide building on all platforms is a new feature. The increase in minor version reflects that and allows those who wish to stay on 1.0.x to continue to do so. Support for 1.0.x will be limited to bug fixes.
+
+ * Move GUID out of variables.go into its own file to make new documentation available.
+ * Move OleError out of ole.go into its own file to make new documentation available.
+ * Add documentation to utility functions.
+ * Add documentation to variant receiver functions.
+ * Add documentation to ole structures.
+ * Make variant available to other systems outside of Windows.
+ * Make OLE structures available to other systems outside of Windows.
+
+## New Features
+
+ * Library should now be built on all platforms supported by Go. Library will NOOP on any platform that is not Windows.
+ * More functions are now documented and available on godoc.org.
+
+# Version 1.0.1
+
+ 1. Fix package references from repository location change.
+
+# Version 1.0.0
+
+This version is stable enough for use. The COM API is still incomplete, but provides enough functionality for accessing COM servers using IDispatch interface.
+
+There is no changelog for this version. Check commits for history.

vendor/github.com/go-ole/go-ole/LICENSE

@@ -0,0 +1,21 @@
+The MIT License (MIT)
+
+Copyright © 2013-2017 Yasuhiro Matsumoto, <mattn.jp@gmail.com>
+
+Permission is hereby granted, free of charge, to any person obtaining a copy of
+this software and associated documentation files (the “Software”), to deal in
+the Software without restriction, including without limitation the rights to
+use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies
+of the Software, and to permit persons to whom the Software is furnished to do
+so, subject to the following conditions:
+
+The above copyright notice and this permission notice shall be included in all
+copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED “AS IS”, WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+SOFTWARE.

vendor/github.com/go-ole/go-ole/README.md

@@ -0,0 +1,46 @@
+# Go OLE
+
+[![Build status](https://ci.appveyor.com/api/projects/status/qr0u2sf7q43us9fj?svg=true)](https://ci.appveyor.com/project/jacobsantos/go-ole-jgs28)
+[![Build Status](https://travis-ci.org/go-ole/go-ole.svg?branch=master)](https://travis-ci.org/go-ole/go-ole)
+[![GoDoc](https://godoc.org/github.com/go-ole/go-ole?status.svg)](https://godoc.org/github.com/go-ole/go-ole)
+
+Go bindings for Windows COM using shared libraries instead of cgo.
+
+By Yasuhiro Matsumoto.
+
+## Install
+
+To experiment with go-ole, you can just compile and run the example program:
+
+```
+go get github.com/go-ole/go-ole
+cd /path/to/go-ole/
+go test
+
+cd /path/to/go-ole/example/excel
+go run excel.go
+```
+
+## Continuous Integration
+
+Continuous integration configuration has been added for both Travis-CI and AppVeyor. You will have to add these to your own account for your fork in order for it to run.
+
+**Travis-CI**
+
+Travis-CI was added to check builds on Linux to ensure that `go get` works when cross building. Currently, Travis-CI is not used to test cross-building, but this may be changed in the future. It is also not currently possible to test the library on Linux, since COM API is specific to Windows and it is not currently possible to run a COM server on Linux or even connect to a remote COM server.
+
+**AppVeyor**
+
+AppVeyor is used to build on Windows using the (in-development) test COM server. It is currently only used to test the build and ensure that the code works on Windows. It will be used to register a COM server and then run the test cases based on the test COM server.
+
+The tests currently do run and do pass and this should be maintained with commits.
+
+## Versioning
+
+Go OLE uses [semantic versioning](http://semver.org) for version numbers, which is similar to the version contract of the Go language. Which means that the major version will always maintain backwards compatibility with minor versions. Minor versions will only add new additions and changes. Fixes will always be in patch. 
+
+This contract should allow you to upgrade to new minor and patch versions without breakage or modifications to your existing code. Leave a ticket, if there is breakage, so that it could be fixed.
+
+## LICENSE
+
+Under the MIT License: http://mattn.mit-license.org/2013

vendor/github.com/go-ole/go-ole/appveyor.yml

@@ -0,0 +1,54 @@
+# Notes:
+#   - Minimal appveyor.yml file is an empty file. All sections are optional.
+#   - Indent each level of configuration with 2 spaces. Do not use tabs!
+#   - All section names are case-sensitive.
+#   - Section names should be unique on each level.
+
+version: "1.3.0.{build}-alpha-{branch}"
+
+os: Windows Server 2012 R2
+
+branches:
+  only:
+    - master
+    - v1.2
+    - v1.1
+    - v1.0
+
+skip_tags: true
+
+clone_folder: c:\gopath\src\github.com\go-ole\go-ole
+
+environment:
+  GOPATH: c:\gopath
+  matrix:
+  - GOARCH: amd64
+    GOVERSION: 1.5
+    GOROOT: c:\go
+    DOWNLOADPLATFORM: "x64"
+
+install:
+  - choco install mingw
+  - SET PATH=c:\tools\mingw64\bin;%PATH%
+  # - Download COM Server
+  - ps: Start-FileDownload "https://github.com/go-ole/test-com-server/releases/download/v1.0.2/test-com-server-${env:DOWNLOADPLATFORM}.zip"
+  - 7z e test-com-server-%DOWNLOADPLATFORM%.zip -oc:\gopath\src\github.com\go-ole\go-ole > NUL
+  - c:\gopath\src\github.com\go-ole\go-ole\build\register-assembly.bat
+  # - set
+  - go version
+  - go env
+  - go get -u golang.org/x/tools/cmd/cover
+  - go get -u golang.org/x/tools/cmd/godoc
+  - go get -u golang.org/x/tools/cmd/stringer
+
+build_script:
+  - cd c:\gopath\src\github.com\go-ole\go-ole
+  - go get -v -t ./...
+  - go build
+  - go test -v -cover ./...
+
+# disable automatic tests
+test: off
+
+# disable deployment
+deploy: off

vendor/github.com/go-ole/go-ole/com.go

@@ -0,0 +1,344 @@
+// +build windows
+
+package ole
+
+import (
+	"syscall"
+	"unicode/utf16"
+	"unsafe"
+)
+
+var (
+	procCoInitialize            = modole32.NewProc("CoInitialize")
+	procCoInitializeEx          = modole32.NewProc("CoInitializeEx")
+	procCoUninitialize          = modole32.NewProc("CoUninitialize")
+	procCoCreateInstance        = modole32.NewProc("CoCreateInstance")
+	procCoTaskMemFree           = modole32.NewProc("CoTaskMemFree")
+	procCLSIDFromProgID         = modole32.NewProc("CLSIDFromProgID")
+	procCLSIDFromString         = modole32.NewProc("CLSIDFromString")
+	procStringFromCLSID         = modole32.NewProc("StringFromCLSID")
+	procStringFromIID           = modole32.NewProc("StringFromIID")
+	procIIDFromString           = modole32.NewProc("IIDFromString")
+	procCoGetObject             = modole32.NewProc("CoGetObject")
+	procGetUserDefaultLCID      = modkernel32.NewProc("GetUserDefaultLCID")
+	procCopyMemory              = modkernel32.NewProc("RtlMoveMemory")
+	procVariantInit             = modoleaut32.NewProc("VariantInit")
+	procVariantClear            = modoleaut32.NewProc("VariantClear")
+	procVariantTimeToSystemTime = modoleaut32.NewProc("VariantTimeToSystemTime")
+	procSysAllocString          = modoleaut32.NewProc("SysAllocString")
+	procSysAllocStringLen       = modoleaut32.NewProc("SysAllocStringLen")
+	procSysFreeString           = modoleaut32.NewProc("SysFreeString")
+	procSysStringLen            = modoleaut32.NewProc("SysStringLen")
+	procCreateDispTypeInfo      = modoleaut32.NewProc("CreateDispTypeInfo")
+	procCreateStdDispatch       = modoleaut32.NewProc("CreateStdDispatch")
+	procGetActiveObject         = modoleaut32.NewProc("GetActiveObject")
+
+	procGetMessageW      = moduser32.NewProc("GetMessageW")
+	procDispatchMessageW = moduser32.NewProc("DispatchMessageW")
+)
+
+// coInitialize initializes COM library on current thread.
+//
+// MSDN documentation suggests that this function should not be called. Call
+// CoInitializeEx() instead. The reason has to do with threading and this
+// function is only for single-threaded apartments.
+//
+// That said, most users of the library have gotten away with just this
+// function. If you are experiencing threading issues, then use
+// CoInitializeEx().
+func coInitialize() (err error) {
+	// http://msdn.microsoft.com/en-us/library/windows/desktop/ms678543(v=vs.85).aspx
+	// Suggests that no value should be passed to CoInitialized.
+	// Could just be Call() since the parameter is optional. <-- Needs testing to be sure.
+	hr, _, _ := procCoInitialize.Call(uintptr(0))
+	if hr != 0 {
+		err = NewError(hr)
+	}
+	return
+}
+
+// coInitializeEx initializes COM library with concurrency model.
+func coInitializeEx(coinit uint32) (err error) {
+	// http://msdn.microsoft.com/en-us/library/windows/desktop/ms695279(v=vs.85).aspx
+	// Suggests that the first parameter is not only optional but should always be NULL.
+	hr, _, _ := procCoInitializeEx.Call(uintptr(0), uintptr(coinit))
+	if hr != 0 {
+		err = NewError(hr)
+	}
+	return
+}
+
+// CoInitialize initializes COM library on current thread.
+//
+// MSDN documentation suggests that this function should not be called. Call
+// CoInitializeEx() instead. The reason has to do with threading and this
+// function is only for single-threaded apartments.
+//
+// That said, most users of the library have gotten away with just this
+// function. If you are experiencing threading issues, then use
+// CoInitializeEx().
+func CoInitialize(p uintptr) (err error) {
+	// p is ignored and won't be used.
+	// Avoid any variable not used errors.
+	p = uintptr(0)
+	return coInitialize()
+}
+
+// CoInitializeEx initializes COM library with concurrency model.
+func CoInitializeEx(p uintptr, coinit uint32) (err error) {
+	// Avoid any variable not used errors.
+	p = uintptr(0)
+	return coInitializeEx(coinit)
+}
+
+// CoUninitialize uninitializes COM Library.
+func CoUninitialize() {
+	procCoUninitialize.Call()
+}
+
+// CoTaskMemFree frees memory pointer.
+func CoTaskMemFree(memptr uintptr) {
+	procCoTaskMemFree.Call(memptr)
+}
+
+// CLSIDFromProgID retrieves Class Identifier with the given Program Identifier.
+//
+// The Programmatic Identifier must be registered, because it will be looked up
+// in the Windows Registry. The registry entry has the following keys: CLSID,
+// Insertable, Protocol and Shell
+// (https://msdn.microsoft.com/en-us/library/dd542719(v=vs.85).aspx).
+//
+// programID identifies the class id with less precision and is not guaranteed
+// to be unique. These are usually found in the registry under
+// HKEY_LOCAL_MACHINE\SOFTWARE\Classes, usually with the format of
+// "Program.Component.Version" with version being optional.
+//
+// CLSIDFromProgID in Windows API.
+func CLSIDFromProgID(progId string) (clsid *GUID, err error) {
+	var guid GUID
+	lpszProgID := uintptr(unsafe.Pointer(syscall.StringToUTF16Ptr(progId)))
+	hr, _, _ := procCLSIDFromProgID.Call(lpszProgID, uintptr(unsafe.Pointer(&guid)))
+	if hr != 0 {
+		err = NewError(hr)
+	}
+	clsid = &guid
+	return
+}
+
+// CLSIDFromString retrieves Class ID from string representation.
+//
+// This is technically the string version of the GUID and will convert the
+// string to object.
+//
+// CLSIDFromString in Windows API.
+func CLSIDFromString(str string) (clsid *GUID, err error) {
+	var guid GUID
+	lpsz := uintptr(unsafe.Pointer(syscall.StringToUTF16Ptr(str)))
+	hr, _, _ := procCLSIDFromString.Call(lpsz, uintptr(unsafe.Pointer(&guid)))
+	if hr != 0 {
+		err = NewError(hr)
+	}
+	clsid = &guid
+	return
+}
+
+// StringFromCLSID returns GUID formated string from GUID object.
+func StringFromCLSID(clsid *GUID) (str string, err error) {
+	var p *uint16
+	hr, _, _ := procStringFromCLSID.Call(uintptr(unsafe.Pointer(clsid)), uintptr(unsafe.Pointer(&p)))
+	if hr != 0 {
+		err = NewError(hr)
+	}
+	str = LpOleStrToString(p)
+	return
+}
+
+// IIDFromString returns GUID from program ID.
+func IIDFromString(progId string) (clsid *GUID, err error) {
+	var guid GUID
+	lpsz := uintptr(unsafe.Pointer(syscall.StringToUTF16Ptr(progId)))
+	hr, _, _ := procIIDFromString.Call(lpsz, uintptr(unsafe.Pointer(&guid)))
+	if hr != 0 {
+		err = NewError(hr)
+	}
+	clsid = &guid
+	return
+}
+
+// StringFromIID returns GUID formatted string from GUID object.
+func StringFromIID(iid *GUID) (str string, err error) {
+	var p *uint16
+	hr, _, _ := procStringFromIID.Call(uintptr(unsafe.Pointer(iid)), uintptr(unsafe.Pointer(&p)))
+	if hr != 0 {
+		err = NewError(hr)
+	}
+	str = LpOleStrToString(p)
+	return
+}
+
+// CreateInstance of single uninitialized object with GUID.
+func CreateInstance(clsid *GUID, iid *GUID) (unk *IUnknown, err error) {
+	if iid == nil {
+		iid = IID_IUnknown
+	}
+	hr, _, _ := procCoCreateInstance.Call(
+		uintptr(unsafe.Pointer(clsid)),
+		0,
+		CLSCTX_SERVER,
+		uintptr(unsafe.Pointer(iid)),
+		uintptr(unsafe.Pointer(&unk)))
+	if hr != 0 {
+		err = NewError(hr)
+	}
+	return
+}
+
+// GetActiveObject retrieves pointer to active object.
+func GetActiveObject(clsid *GUID, iid *GUID) (unk *IUnknown, err error) {
+	if iid == nil {
+		iid = IID_IUnknown
+	}
+	hr, _, _ := procGetActiveObject.Call(
+		uintptr(unsafe.Pointer(clsid)),
+		uintptr(unsafe.Pointer(iid)),
+		uintptr(unsafe.Pointer(&unk)))
+	if hr != 0 {
+		err = NewError(hr)
+	}
+	return
+}
+
+type BindOpts struct {
+	CbStruct          uint32
+	GrfFlags          uint32
+	GrfMode           uint32
+	TickCountDeadline uint32
+}
+
+// GetObject retrieves pointer to active object.
+func GetObject(programID string, bindOpts *BindOpts, iid *GUID) (unk *IUnknown, err error) {
+	if bindOpts != nil {
+		bindOpts.CbStruct = uint32(unsafe.Sizeof(BindOpts{}))
+	}
+	if iid == nil {
+		iid = IID_IUnknown
+	}
+	hr, _, _ := procCoGetObject.Call(
+		uintptr(unsafe.Pointer(syscall.StringToUTF16Ptr(programID))),
+		uintptr(unsafe.Pointer(bindOpts)),
+		uintptr(unsafe.Pointer(iid)),
+		uintptr(unsafe.Pointer(&unk)))
+	if hr != 0 {
+		err = NewError(hr)
+	}
+	return
+}
+
+// VariantInit initializes variant.
+func VariantInit(v *VARIANT) (err error) {
+	hr, _, _ := procVariantInit.Call(uintptr(unsafe.Pointer(v)))
+	if hr != 0 {
+		err = NewError(hr)
+	}
+	return
+}
+
+// VariantClear clears value in Variant settings to VT_EMPTY.
+func VariantClear(v *VARIANT) (err error) {
+	hr, _, _ := procVariantClear.Call(uintptr(unsafe.Pointer(v)))
+	if hr != 0 {
+		err = NewError(hr)
+	}
+	return
+}
+
+// SysAllocString allocates memory for string and copies string into memory.
+func SysAllocString(v string) (ss *int16) {
+	pss, _, _ := procSysAllocString.Call(uintptr(unsafe.Pointer(syscall.StringToUTF16Ptr(v))))
+	ss = (*int16)(unsafe.Pointer(pss))
+	return
+}
+
+// SysAllocStringLen copies up to length of given string returning pointer.
+func SysAllocStringLen(v string) (ss *int16) {
+	utf16 := utf16.Encode([]rune(v + "\x00"))
+	ptr := &utf16[0]
+
+	pss, _, _ := procSysAllocStringLen.Call(uintptr(unsafe.Pointer(ptr)), uintptr(len(utf16)-1))
+	ss = (*int16)(unsafe.Pointer(pss))
+	return
+}
+
+// SysFreeString frees string system memory. This must be called with SysAllocString.
+func SysFreeString(v *int16) (err error) {
+	hr, _, _ := procSysFreeString.Call(uintptr(unsafe.Pointer(v)))
+	if hr != 0 {
+		err = NewError(hr)
+	}
+	return
+}
+
+// SysStringLen is the length of the system allocated string.
+func SysStringLen(v *int16) uint32 {
+	l, _, _ := procSysStringLen.Call(uintptr(unsafe.Pointer(v)))
+	return uint32(l)
+}
+
+// CreateStdDispatch provides default IDispatch implementation for IUnknown.
+//
+// This handles default IDispatch implementation for objects. It haves a few
+// limitations with only supporting one language. It will also only return
+// default exception codes.
+func CreateStdDispatch(unk *IUnknown, v uintptr, ptinfo *IUnknown) (disp *IDispatch, err error) {
+	hr, _, _ := procCreateStdDispatch.Call(
+		uintptr(unsafe.Pointer(unk)),
+		v,
+		uintptr(unsafe.Pointer(ptinfo)),
+		uintptr(unsafe.Pointer(&disp)))
+	if hr != 0 {
+		err = NewError(hr)
+	}
+	return
+}
+
+// CreateDispTypeInfo provides default ITypeInfo implementation for IDispatch.
+//
+// This will not handle the full implementation of the interface.
+func CreateDispTypeInfo(idata *INTERFACEDATA) (pptinfo *IUnknown, err error) {
+	hr, _, _ := procCreateDispTypeInfo.Call(
+		uintptr(unsafe.Pointer(idata)),
+		uintptr(GetUserDefaultLCID()),
+		uintptr(unsafe.Pointer(&pptinfo)))
+	if hr != 0 {
+		err = NewError(hr)
+	}
+	return
+}
+
+// copyMemory moves location of a block of memory.
+func copyMemory(dest unsafe.Pointer, src unsafe.Pointer, length uint32) {
+	procCopyMemory.Call(uintptr(dest), uintptr(src), uintptr(length))
+}
+
+// GetUserDefaultLCID retrieves current user default locale.
+func GetUserDefaultLCID() (lcid uint32) {
+	ret, _, _ := procGetUserDefaultLCID.Call()
+	lcid = uint32(ret)
+	return
+}
+
+// GetMessage in message queue from runtime.
+//
+// This function appears to block. PeekMessage does not block.
+func GetMessage(msg *Msg, hwnd uint32, MsgFilterMin uint32, MsgFilterMax uint32) (ret int32, err error) {
+	r0, _, err := procGetMessageW.Call(uintptr(unsafe.Pointer(msg)), uintptr(hwnd), uintptr(MsgFilterMin), uintptr(MsgFilterMax))
+	ret = int32(r0)
+	return
+}
+
+// DispatchMessage to window procedure.
+func DispatchMessage(msg *Msg) (ret int32) {
+	r0, _, _ := procDispatchMessageW.Call(uintptr(unsafe.Pointer(msg)))
+	ret = int32(r0)
+	return
+}

vendor/github.com/go-ole/go-ole/com_func.go

@@ -0,0 +1,174 @@
+// +build !windows
+
+package ole
+
+import (
+	"time"
+	"unsafe"
+)
+
+// coInitialize initializes COM library on current thread.
+//
+// MSDN documentation suggests that this function should not be called. Call
+// CoInitializeEx() instead. The reason has to do with threading and this
+// function is only for single-threaded apartments.
+//
+// That said, most users of the library have gotten away with just this
+// function. If you are experiencing threading issues, then use
+// CoInitializeEx().
+func coInitialize() error {
+	return NewError(E_NOTIMPL)
+}
+
+// coInitializeEx initializes COM library with concurrency model.
+func coInitializeEx(coinit uint32) error {
+	return NewError(E_NOTIMPL)
+}
+
+// CoInitialize initializes COM library on current thread.
+//
+// MSDN documentation suggests that this function should not be called. Call
+// CoInitializeEx() instead. The reason has to do with threading and this
+// function is only for single-threaded apartments.
+//
+// That said, most users of the library have gotten away with just this
+// function. If you are experiencing threading issues, then use
+// CoInitializeEx().
+func CoInitialize(p uintptr) error {
+	return NewError(E_NOTIMPL)
+}
+
+// CoInitializeEx initializes COM library with concurrency model.
+func CoInitializeEx(p uintptr, coinit uint32) error {
+	return NewError(E_NOTIMPL)
+}
+
+// CoUninitialize uninitializes COM Library.
+func CoUninitialize() {}
+
+// CoTaskMemFree frees memory pointer.
+func CoTaskMemFree(memptr uintptr) {}
+
+// CLSIDFromProgID retrieves Class Identifier with the given Program Identifier.
+//
+// The Programmatic Identifier must be registered, because it will be looked up
+// in the Windows Registry. The registry entry has the following keys: CLSID,
+// Insertable, Protocol and Shell
+// (https://msdn.microsoft.com/en-us/library/dd542719(v=vs.85).aspx).
+//
+// programID identifies the class id with less precision and is not guaranteed
+// to be unique. These are usually found in the registry under
+// HKEY_LOCAL_MACHINE\SOFTWARE\Classes, usually with the format of
+// "Program.Component.Version" with version being optional.
+//
+// CLSIDFromProgID in Windows API.
+func CLSIDFromProgID(progId string) (*GUID, error) {
+	return nil, NewError(E_NOTIMPL)
+}
+
+// CLSIDFromString retrieves Class ID from string representation.
+//
+// This is technically the string version of the GUID and will convert the
+// string to object.
+//
+// CLSIDFromString in Windows API.
+func CLSIDFromString(str string) (*GUID, error) {
+	return nil, NewError(E_NOTIMPL)
+}
+
+// StringFromCLSID returns GUID formated string from GUID object.
+func StringFromCLSID(clsid *GUID) (string, error) {
+	return "", NewError(E_NOTIMPL)
+}
+
+// IIDFromString returns GUID from program ID.
+func IIDFromString(progId string) (*GUID, error) {
+	return nil, NewError(E_NOTIMPL)
+}
+
+// StringFromIID returns GUID formatted string from GUID object.
+func StringFromIID(iid *GUID) (string, error) {
+	return "", NewError(E_NOTIMPL)
+}
+
+// CreateInstance of single uninitialized object with GUID.
+func CreateInstance(clsid *GUID, iid *GUID) (*IUnknown, error) {
+	return nil, NewError(E_NOTIMPL)
+}
+
+// GetActiveObject retrieves pointer to active object.
+func GetActiveObject(clsid *GUID, iid *GUID) (*IUnknown, error) {
+	return nil, NewError(E_NOTIMPL)
+}
+
+// VariantInit initializes variant.
+func VariantInit(v *VARIANT) error {
+	return NewError(E_NOTIMPL)
+}
+
+// VariantClear clears value in Variant settings to VT_EMPTY.
+func VariantClear(v *VARIANT) error {
+	return NewError(E_NOTIMPL)
+}
+
+// SysAllocString allocates memory for string and copies string into memory.
+func SysAllocString(v string) *int16 {
+	u := int16(0)
+	return &u
+}
+
+// SysAllocStringLen copies up to length of given string returning pointer.
+func SysAllocStringLen(v string) *int16 {
+	u := int16(0)
+	return &u
+}
+
+// SysFreeString frees string system memory. This must be called with SysAllocString.
+func SysFreeString(v *int16) error {
+	return NewError(E_NOTIMPL)
+}
+
+// SysStringLen is the length of the system allocated string.
+func SysStringLen(v *int16) uint32 {
+	return uint32(0)
+}
+
+// CreateStdDispatch provides default IDispatch implementation for IUnknown.
+//
+// This handles default IDispatch implementation for objects. It haves a few
+// limitations with only supporting one language. It will also only return
+// default exception codes.
+func CreateStdDispatch(unk *IUnknown, v uintptr, ptinfo *IUnknown) (*IDispatch, error) {
+	return nil, NewError(E_NOTIMPL)
+}
+
+// CreateDispTypeInfo provides default ITypeInfo implementation for IDispatch.
+//
+// This will not handle the full implementation of the interface.
+func CreateDispTypeInfo(idata *INTERFACEDATA) (*IUnknown, error) {
+	return nil, NewError(E_NOTIMPL)
+}
+
+// copyMemory moves location of a block of memory.
+func copyMemory(dest unsafe.Pointer, src unsafe.Pointer, length uint32) {}
+
+// GetUserDefaultLCID retrieves current user default locale.
+func GetUserDefaultLCID() uint32 {
+	return uint32(0)
+}
+
+// GetMessage in message queue from runtime.
+//
+// This function appears to block. PeekMessage does not block.
+func GetMessage(msg *Msg, hwnd uint32, MsgFilterMin uint32, MsgFilterMax uint32) (int32, error) {
+	return int32(0), NewError(E_NOTIMPL)
+}
+
+// DispatchMessage to window procedure.
+func DispatchMessage(msg *Msg) int32 {
+	return int32(0)
+}
+
+func GetVariantDate(value uint64) (time.Time, error) {
+	return time.Now(), NewError(E_NOTIMPL)
+}

vendor/github.com/go-ole/go-ole/connect.go

@@ -0,0 +1,192 @@
+package ole
+
+// Connection contains IUnknown for fluent interface interaction.
+//
+// Deprecated. Use oleutil package instead.
+type Connection struct {
+	Object *IUnknown // Access COM
+}
+
+// Initialize COM.
+func (*Connection) Initialize() (err error) {
+	return coInitialize()
+}
+
+// Uninitialize COM.
+func (*Connection) Uninitialize() {
+	CoUninitialize()
+}
+
+// Create IUnknown object based first on ProgId and then from String.
+func (c *Connection) Create(progId string) (err error) {
+	var clsid *GUID
+	clsid, err = CLSIDFromProgID(progId)
+	if err != nil {
+		clsid, err = CLSIDFromString(progId)
+		if err != nil {
+			return
+		}
+	}
+
+	unknown, err := CreateInstance(clsid, IID_IUnknown)
+	if err != nil {
+		return
+	}
+	c.Object = unknown
+
+	return
+}
+
+// Release IUnknown object.
+func (c *Connection) Release() {
+	c.Object.Release()
+}
+
+// Load COM object from list of programIDs or strings.
+func (c *Connection) Load(names ...string) (errors []error) {
+	var tempErrors []error = make([]error, len(names))
+	var numErrors int = 0
+	for _, name := range names {
+		err := c.Create(name)
+		if err != nil {
+			tempErrors = append(tempErrors, err)
+			numErrors += 1
+			continue
+		}
+		break
+	}
+
+	copy(errors, tempErrors[0:numErrors])
+	return
+}
+
+// Dispatch returns Dispatch object.
+func (c *Connection) Dispatch() (object *Dispatch, err error) {
+	dispatch, err := c.Object.QueryInterface(IID_IDispatch)
+	if err != nil {
+		return
+	}
+	object = &Dispatch{dispatch}
+	return
+}
+
+// Dispatch stores IDispatch object.
+type Dispatch struct {
+	Object *IDispatch // Dispatch object.
+}
+
+// Call method on IDispatch with parameters.
+func (d *Dispatch) Call(method string, params ...interface{}) (result *VARIANT, err error) {
+	id, err := d.GetId(method)
+	if err != nil {
+		return
+	}
+
+	result, err = d.Invoke(id, DISPATCH_METHOD, params)
+	return
+}
+
+// MustCall method on IDispatch with parameters.
+func (d *Dispatch) MustCall(method string, params ...interface{}) (result *VARIANT) {
+	id, err := d.GetId(method)
+	if err != nil {
+		panic(err)
+	}
+
+	result, err = d.Invoke(id, DISPATCH_METHOD, params)
+	if err != nil {
+		panic(err)
+	}
+
+	return
+}
+
+// Get property on IDispatch with parameters.
+func (d *Dispatch) Get(name string, params ...interface{}) (result *VARIANT, err error) {
+	id, err := d.GetId(name)
+	if err != nil {
+		return
+	}
+	result, err = d.Invoke(id, DISPATCH_PROPERTYGET, params)
+	return
+}
+
+// MustGet property on IDispatch with parameters.
+func (d *Dispatch) MustGet(name string, params ...interface{}) (result *VARIANT) {
+	id, err := d.GetId(name)
+	if err != nil {
+		panic(err)
+	}
+
+	result, err = d.Invoke(id, DISPATCH_PROPERTYGET, params)
+	if err != nil {
+		panic(err)
+	}
+	return
+}
+
+// Set property on IDispatch with parameters.
+func (d *Dispatch) Set(name string, params ...interface{}) (result *VARIANT, err error) {
+	id, err := d.GetId(name)
+	if err != nil {
+		return
+	}
+	result, err = d.Invoke(id, DISPATCH_PROPERTYPUT, params)
+	return
+}
+
+// MustSet property on IDispatch with parameters.
+func (d *Dispatch) MustSet(name string, params ...interface{}) (result *VARIANT) {
+	id, err := d.GetId(name)
+	if err != nil {
+		panic(err)
+	}
+
+	result, err = d.Invoke(id, DISPATCH_PROPERTYPUT, params)
+	if err != nil {
+		panic(err)
+	}
+	return
+}
+
+// GetId retrieves ID of name on IDispatch.
+func (d *Dispatch) GetId(name string) (id int32, err error) {
+	var dispid []int32
+	dispid, err = d.Object.GetIDsOfName([]string{name})
+	if err != nil {
+		return
+	}
+	id = dispid[0]
+	return
+}
+
+// GetIds retrieves all IDs of names on IDispatch.
+func (d *Dispatch) GetIds(names ...string) (dispid []int32, err error) {
+	dispid, err = d.Object.GetIDsOfName(names)
+	return
+}
+
+// Invoke IDispatch on DisplayID of dispatch type with parameters.
+//
+// There have been problems where if send cascading params..., it would error
+// out because the parameters would be empty.
+func (d *Dispatch) Invoke(id int32, dispatch int16, params []interface{}) (result *VARIANT, err error) {
+	if len(params) < 1 {
+		result, err = d.Object.Invoke(id, dispatch)
+	} else {
+		result, err = d.Object.Invoke(id, dispatch, params...)
+	}
+	return
+}
+
+// Release IDispatch object.
+func (d *Dispatch) Release() {
+	d.Object.Release()
+}
+
+// Connect initializes COM and attempts to load IUnknown based on given names.
+func Connect(names ...string) (connection *Connection) {
+	connection.Initialize()
+	connection.Load(names...)
+	return
+}

vendor/github.com/go-ole/go-ole/constants.go

@@ -0,0 +1,153 @@
+package ole
+
+const (
+	CLSCTX_INPROC_SERVER   = 1
+	CLSCTX_INPROC_HANDLER  = 2
+	CLSCTX_LOCAL_SERVER    = 4
+	CLSCTX_INPROC_SERVER16 = 8
+	CLSCTX_REMOTE_SERVER   = 16
+	CLSCTX_ALL             = CLSCTX_INPROC_SERVER | CLSCTX_INPROC_HANDLER | CLSCTX_LOCAL_SERVER
+	CLSCTX_INPROC          = CLSCTX_INPROC_SERVER | CLSCTX_INPROC_HANDLER
+	CLSCTX_SERVER          = CLSCTX_INPROC_SERVER | CLSCTX_LOCAL_SERVER | CLSCTX_REMOTE_SERVER
+)
+
+const (
+	COINIT_APARTMENTTHREADED = 0x2
+	COINIT_MULTITHREADED     = 0x0
+	COINIT_DISABLE_OLE1DDE   = 0x4
+	COINIT_SPEED_OVER_MEMORY = 0x8
+)
+
+const (
+	DISPATCH_METHOD         = 1
+	DISPATCH_PROPERTYGET    = 2
+	DISPATCH_PROPERTYPUT    = 4
+	DISPATCH_PROPERTYPUTREF = 8
+)
+
+const (
+	S_OK           = 0x00000000
+	E_UNEXPECTED   = 0x8000FFFF
+	E_NOTIMPL      = 0x80004001
+	E_OUTOFMEMORY  = 0x8007000E
+	E_INVALIDARG   = 0x80070057
+	E_NOINTERFACE  = 0x80004002
+	E_POINTER      = 0x80004003
+	E_HANDLE       = 0x80070006
+	E_ABORT        = 0x80004004
+	E_FAIL         = 0x80004005
+	E_ACCESSDENIED = 0x80070005
+	E_PENDING      = 0x8000000A
+
+	CO_E_CLASSSTRING = 0x800401F3
+)
+
+const (
+	CC_FASTCALL = iota
+	CC_CDECL
+	CC_MSCPASCAL
+	CC_PASCAL = CC_MSCPASCAL
+	CC_MACPASCAL
+	CC_STDCALL
+	CC_FPFASTCALL
+	CC_SYSCALL
+	CC_MPWCDECL
+	CC_MPWPASCAL
+	CC_MAX = CC_MPWPASCAL
+)
+
+type VT uint16
+
+const (
+	VT_EMPTY           VT = 0x0
+	VT_NULL            VT = 0x1
+	VT_I2              VT = 0x2
+	VT_I4              VT = 0x3
+	VT_R4              VT = 0x4
+	VT_R8              VT = 0x5
+	VT_CY              VT = 0x6
+	VT_DATE            VT = 0x7
+	VT_BSTR            VT = 0x8
+	VT_DISPATCH        VT = 0x9
+	VT_ERROR           VT = 0xa
+	VT_BOOL            VT = 0xb
+	VT_VARIANT         VT = 0xc
+	VT_UNKNOWN         VT = 0xd
+	VT_DECIMAL         VT = 0xe
+	VT_I1              VT = 0x10
+	VT_UI1             VT = 0x11
+	VT_UI2             VT = 0x12
+	VT_UI4             VT = 0x13
+	VT_I8              VT = 0x14
+	VT_UI8             VT = 0x15
+	VT_INT             VT = 0x16
+	VT_UINT            VT = 0x17
+	VT_VOID            VT = 0x18
+	VT_HRESULT         VT = 0x19
+	VT_PTR             VT = 0x1a
+	VT_SAFEARRAY       VT = 0x1b
+	VT_CARRAY          VT = 0x1c
+	VT_USERDEFINED     VT = 0x1d
+	VT_LPSTR           VT = 0x1e
+	VT_LPWSTR          VT = 0x1f
+	VT_RECORD          VT = 0x24
+	VT_INT_PTR         VT = 0x25
+	VT_UINT_PTR        VT = 0x26
+	VT_FILETIME        VT = 0x40
+	VT_BLOB            VT = 0x41
+	VT_STREAM          VT = 0x42
+	VT_STORAGE         VT = 0x43
+	VT_STREAMED_OBJECT VT = 0x44
+	VT_STORED_OBJECT   VT = 0x45
+	VT_BLOB_OBJECT     VT = 0x46
+	VT_CF              VT = 0x47
+	VT_CLSID           VT = 0x48
+	VT_BSTR_BLOB       VT = 0xfff
+	VT_VECTOR          VT = 0x1000
+	VT_ARRAY           VT = 0x2000
+	VT_BYREF           VT = 0x4000
+	VT_RESERVED        VT = 0x8000
+	VT_ILLEGAL         VT = 0xffff
+	VT_ILLEGALMASKED   VT = 0xfff
+	VT_TYPEMASK        VT = 0xfff
+)
+
+const (
+	DISPID_UNKNOWN     = -1
+	DISPID_VALUE       = 0
+	DISPID_PROPERTYPUT = -3
+	DISPID_NEWENUM     = -4
+	DISPID_EVALUATE    = -5
+	DISPID_CONSTRUCTOR = -6
+	DISPID_DESTRUCTOR  = -7
+	DISPID_COLLECT     = -8
+)
+
+const (
+	TKIND_ENUM      = 1
+	TKIND_RECORD    = 2
+	TKIND_MODULE    = 3
+	TKIND_INTERFACE = 4
+	TKIND_DISPATCH  = 5
+	TKIND_COCLASS   = 6
+	TKIND_ALIAS     = 7
+	TKIND_UNION     = 8
+	TKIND_MAX       = 9
+)
+
+// Safe Array Feature Flags
+
+const (
+	FADF_AUTO        = 0x0001
+	FADF_STATIC      = 0x0002
+	FADF_EMBEDDED    = 0x0004
+	FADF_FIXEDSIZE   = 0x0010
+	FADF_RECORD      = 0x0020
+	FADF_HAVEIID     = 0x0040
+	FADF_HAVEVARTYPE = 0x0080
+	FADF_BSTR        = 0x0100
+	FADF_UNKNOWN     = 0x0200
+	FADF_DISPATCH    = 0x0400
+	FADF_VARIANT     = 0x0800
+	FADF_RESERVED    = 0xF008
+)

vendor/github.com/go-ole/go-ole/error.go

@@ -0,0 +1,51 @@
+package ole
+
+// OleError stores COM errors.
+type OleError struct {
+	hr          uintptr
+	description string
+	subError    error
+}
+
+// NewError creates new error with HResult.
+func NewError(hr uintptr) *OleError {
+	return &OleError{hr: hr}
+}
+
+// NewErrorWithDescription creates new COM error with HResult and description.
+func NewErrorWithDescription(hr uintptr, description string) *OleError {
+	return &OleError{hr: hr, description: description}
+}
+
+// NewErrorWithSubError creates new COM error with parent error.
+func NewErrorWithSubError(hr uintptr, description string, err error) *OleError {
+	return &OleError{hr: hr, description: description, subError: err}
+}
+
+// Code is the HResult.
+func (v *OleError) Code() uintptr {
+	return uintptr(v.hr)
+}
+
+// String description, either manually set or format message with error code.
+func (v *OleError) String() string {
+	if v.description != "" {
+		return errstr(int(v.hr)) + " (" + v.description + ")"
+	}
+	return errstr(int(v.hr))
+}
+
+// Error implements error interface.
+func (v *OleError) Error() string {
+	return v.String()
+}
+
+// Description retrieves error summary, if there is one.
+func (v *OleError) Description() string {
+	return v.description
+}
+
+// SubError returns parent error, if there is one.
+func (v *OleError) SubError() error {
+	return v.subError
+}

vendor/github.com/go-ole/go-ole/error_func.go

@@ -0,0 +1,8 @@
+// +build !windows
+
+package ole
+
+// errstr converts error code to string.
+func errstr(errno int) string {
+	return ""
+}

vendor/github.com/go-ole/go-ole/error_windows.go

@@ -0,0 +1,24 @@
+// +build windows
+
+package ole
+
+import (
+	"fmt"
+	"syscall"
+	"unicode/utf16"
+)
+
+// errstr converts error code to string.
+func errstr(errno int) string {
+	// ask windows for the remaining errors
+	var flags uint32 = syscall.FORMAT_MESSAGE_FROM_SYSTEM | syscall.FORMAT_MESSAGE_ARGUMENT_ARRAY | syscall.FORMAT_MESSAGE_IGNORE_INSERTS
+	b := make([]uint16, 300)
+	n, err := syscall.FormatMessage(flags, 0, uint32(errno), 0, b, nil)
+	if err != nil {
+		return fmt.Sprintf("error %d (FormatMessage failed with: %v)", errno, err)
+	}
+	// trim terminating \r and \n
+	for ; n > 0 && (b[n-1] == '\n' || b[n-1] == '\r'); n-- {
+	}
+	return string(utf16.Decode(b[:n]))
+}

vendor/github.com/go-ole/go-ole/guid.go

@@ -0,0 +1,284 @@
+package ole
+
+var (
+	// IID_NULL is null Interface ID, used when no other Interface ID is known.
+	IID_NULL = NewGUID("{00000000-0000-0000-0000-000000000000}")
+
+	// IID_IUnknown is for IUnknown interfaces.
+	IID_IUnknown = NewGUID("{00000000-0000-0000-C000-000000000046}")
+
+	// IID_IDispatch is for IDispatch interfaces.
+	IID_IDispatch = NewGUID("{00020400-0000-0000-C000-000000000046}")
+
+	// IID_IEnumVariant is for IEnumVariant interfaces
+	IID_IEnumVariant = NewGUID("{00020404-0000-0000-C000-000000000046}")
+
+	// IID_IConnectionPointContainer is for IConnectionPointContainer interfaces.
+	IID_IConnectionPointContainer = NewGUID("{B196B284-BAB4-101A-B69C-00AA00341D07}")
+
+	// IID_IConnectionPoint is for IConnectionPoint interfaces.
+	IID_IConnectionPoint = NewGUID("{B196B286-BAB4-101A-B69C-00AA00341D07}")
+
+	// IID_IInspectable is for IInspectable interfaces.
+	IID_IInspectable = NewGUID("{AF86E2E0-B12D-4C6A-9C5A-D7AA65101E90}")
+
+	// IID_IProvideClassInfo is for IProvideClassInfo interfaces.
+	IID_IProvideClassInfo = NewGUID("{B196B283-BAB4-101A-B69C-00AA00341D07}")
+)
+
+// These are for testing and not part of any library.
+var (
+	// IID_ICOMTestString is for ICOMTestString interfaces.
+	//
+	// {E0133EB4-C36F-469A-9D3D-C66B84BE19ED}
+	IID_ICOMTestString = NewGUID("{E0133EB4-C36F-469A-9D3D-C66B84BE19ED}")
+
+	// IID_ICOMTestInt8 is for ICOMTestInt8 interfaces.
+	//
+	// {BEB06610-EB84-4155-AF58-E2BFF53680B4}
+	IID_ICOMTestInt8 = NewGUID("{BEB06610-EB84-4155-AF58-E2BFF53680B4}")
+
+	// IID_ICOMTestInt16 is for ICOMTestInt16 interfaces.
+	//
+	// {DAA3F9FA-761E-4976-A860-8364CE55F6FC}
+	IID_ICOMTestInt16 = NewGUID("{DAA3F9FA-761E-4976-A860-8364CE55F6FC}")
+
+	// IID_ICOMTestInt32 is for ICOMTestInt32 interfaces.
+	//
+	// {E3DEDEE7-38A2-4540-91D1-2EEF1D8891B0}
+	IID_ICOMTestInt32 = NewGUID("{E3DEDEE7-38A2-4540-91D1-2EEF1D8891B0}")
+
+	// IID_ICOMTestInt64 is for ICOMTestInt64 interfaces.
+	//
+	// {8D437CBC-B3ED-485C-BC32-C336432A1623}
+	IID_ICOMTestInt64 = NewGUID("{8D437CBC-B3ED-485C-BC32-C336432A1623}")
+
+	// IID_ICOMTestFloat is for ICOMTestFloat interfaces.
+	//
+	// {BF1ED004-EA02-456A-AA55-2AC8AC6B054C}
+	IID_ICOMTestFloat = NewGUID("{BF1ED004-EA02-456A-AA55-2AC8AC6B054C}")
+
+	// IID_ICOMTestDouble is for ICOMTestDouble interfaces.
+	//
+	// {BF908A81-8687-4E93-999F-D86FAB284BA0}
+	IID_ICOMTestDouble = NewGUID("{BF908A81-8687-4E93-999F-D86FAB284BA0}")
+
+	// IID_ICOMTestBoolean is for ICOMTestBoolean interfaces.
+	//
+	// {D530E7A6-4EE8-40D1-8931-3D63B8605010}
+	IID_ICOMTestBoolean = NewGUID("{D530E7A6-4EE8-40D1-8931-3D63B8605010}")
+
+	// IID_ICOMEchoTestObject is for ICOMEchoTestObject interfaces.
+	//
+	// {6485B1EF-D780-4834-A4FE-1EBB51746CA3}
+	IID_ICOMEchoTestObject = NewGUID("{6485B1EF-D780-4834-A4FE-1EBB51746CA3}")
+
+	// IID_ICOMTestTypes is for ICOMTestTypes interfaces.
+	//
+	// {CCA8D7AE-91C0-4277-A8B3-FF4EDF28D3C0}
+	IID_ICOMTestTypes = NewGUID("{CCA8D7AE-91C0-4277-A8B3-FF4EDF28D3C0}")
+
+	// CLSID_COMEchoTestObject is for COMEchoTestObject class.
+	//
+	// {3C24506A-AE9E-4D50-9157-EF317281F1B0}
+	CLSID_COMEchoTestObject = NewGUID("{3C24506A-AE9E-4D50-9157-EF317281F1B0}")
+
+	// CLSID_COMTestScalarClass is for COMTestScalarClass class.
+	//
+	// {865B85C5-0334-4AC6-9EF6-AACEC8FC5E86}
+	CLSID_COMTestScalarClass = NewGUID("{865B85C5-0334-4AC6-9EF6-AACEC8FC5E86}")
+)
+
+const hextable = "0123456789ABCDEF"
+const emptyGUID = "{00000000-0000-0000-0000-000000000000}"
+
+// GUID is Windows API specific GUID type.
+//
+// This exists to match Windows GUID type for direct passing for COM.
+// Format is in xxxxxxxx-xxxx-xxxx-xxxxxxxxxxxxxxxx.
+type GUID struct {
+	Data1 uint32
+	Data2 uint16
+	Data3 uint16
+	Data4 [8]byte
+}
+
+// NewGUID converts the given string into a globally unique identifier that is
+// compliant with the Windows API.
+//
+// The supplied string may be in any of these formats:
+//
+//  XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX
+//  XXXXXXXX-XXXX-XXXX-XXXX-XXXXXXXXXXXX
+//  {XXXXXXXX-XXXX-XXXX-XXXX-XXXXXXXXXXXX}
+//
+// The conversion of the supplied string is not case-sensitive.
+func NewGUID(guid string) *GUID {
+	d := []byte(guid)
+	var d1, d2, d3, d4a, d4b []byte
+
+	switch len(d) {
+	case 38:
+		if d[0] != '{' || d[37] != '}' {
+			return nil
+		}
+		d = d[1:37]
+		fallthrough
+	case 36:
+		if d[8] != '-' || d[13] != '-' || d[18] != '-' || d[23] != '-' {
+			return nil
+		}
+		d1 = d[0:8]
+		d2 = d[9:13]
+		d3 = d[14:18]
+		d4a = d[19:23]
+		d4b = d[24:36]
+	case 32:
+		d1 = d[0:8]
+		d2 = d[8:12]
+		d3 = d[12:16]
+		d4a = d[16:20]
+		d4b = d[20:32]
+	default:
+		return nil
+	}
+
+	var g GUID
+	var ok1, ok2, ok3, ok4 bool
+	g.Data1, ok1 = decodeHexUint32(d1)
+	g.Data2, ok2 = decodeHexUint16(d2)
+	g.Data3, ok3 = decodeHexUint16(d3)
+	g.Data4, ok4 = decodeHexByte64(d4a, d4b)
+	if ok1 && ok2 && ok3 && ok4 {
+		return &g
+	}
+	return nil
+}
+
+func decodeHexUint32(src []byte) (value uint32, ok bool) {
+	var b1, b2, b3, b4 byte
+	var ok1, ok2, ok3, ok4 bool
+	b1, ok1 = decodeHexByte(src[0], src[1])
+	b2, ok2 = decodeHexByte(src[2], src[3])
+	b3, ok3 = decodeHexByte(src[4], src[5])
+	b4, ok4 = decodeHexByte(src[6], src[7])
+	value = (uint32(b1) << 24) | (uint32(b2) << 16) | (uint32(b3) << 8) | uint32(b4)
+	ok = ok1 && ok2 && ok3 && ok4
+	return
+}
+
+func decodeHexUint16(src []byte) (value uint16, ok bool) {
+	var b1, b2 byte
+	var ok1, ok2 bool
+	b1, ok1 = decodeHexByte(src[0], src[1])
+	b2, ok2 = decodeHexByte(src[2], src[3])
+	value = (uint16(b1) << 8) | uint16(b2)
+	ok = ok1 && ok2
+	return
+}
+
+func decodeHexByte64(s1 []byte, s2 []byte) (value [8]byte, ok bool) {
+	var ok1, ok2, ok3, ok4, ok5, ok6, ok7, ok8 bool
+	value[0], ok1 = decodeHexByte(s1[0], s1[1])
+	value[1], ok2 = decodeHexByte(s1[2], s1[3])
+	value[2], ok3 = decodeHexByte(s2[0], s2[1])
+	value[3], ok4 = decodeHexByte(s2[2], s2[3])
+	value[4], ok5 = decodeHexByte(s2[4], s2[5])
+	value[5], ok6 = decodeHexByte(s2[6], s2[7])
+	value[6], ok7 = decodeHexByte(s2[8], s2[9])
+	value[7], ok8 = decodeHexByte(s2[10], s2[11])
+	ok = ok1 && ok2 && ok3 && ok4 && ok5 && ok6 && ok7 && ok8
+	return
+}
+
+func decodeHexByte(c1, c2 byte) (value byte, ok bool) {
+	var n1, n2 byte
+	var ok1, ok2 bool
+	n1, ok1 = decodeHexChar(c1)
+	n2, ok2 = decodeHexChar(c2)
+	value = (n1 << 4) | n2
+	ok = ok1 && ok2
+	return
+}
+
+func decodeHexChar(c byte) (byte, bool) {
+	switch {
+	case '0' <= c && c <= '9':
+		return c - '0', true
+	case 'a' <= c && c <= 'f':
+		return c - 'a' + 10, true
+	case 'A' <= c && c <= 'F':
+		return c - 'A' + 10, true
+	}
+
+	return 0, false
+}
+
+// String converts the GUID to string form. It will adhere to this pattern:
+//
+//  {XXXXXXXX-XXXX-XXXX-XXXX-XXXXXXXXXXXX}
+//
+// If the GUID is nil, the string representation of an empty GUID is returned:
+//
+//  {00000000-0000-0000-0000-000000000000}
+func (guid *GUID) String() string {
+	if guid == nil {
+		return emptyGUID
+	}
+
+	var c [38]byte
+	c[0] = '{'
+	putUint32Hex(c[1:9], guid.Data1)
+	c[9] = '-'
+	putUint16Hex(c[10:14], guid.Data2)
+	c[14] = '-'
+	putUint16Hex(c[15:19], guid.Data3)
+	c[19] = '-'
+	putByteHex(c[20:24], guid.Data4[0:2])
+	c[24] = '-'
+	putByteHex(c[25:37], guid.Data4[2:8])
+	c[37] = '}'
+	return string(c[:])
+}
+
+func putUint32Hex(b []byte, v uint32) {
+	b[0] = hextable[byte(v>>24)>>4]
+	b[1] = hextable[byte(v>>24)&0x0f]
+	b[2] = hextable[byte(v>>16)>>4]
+	b[3] = hextable[byte(v>>16)&0x0f]
+	b[4] = hextable[byte(v>>8)>>4]
+	b[5] = hextable[byte(v>>8)&0x0f]
+	b[6] = hextable[byte(v)>>4]
+	b[7] = hextable[byte(v)&0x0f]
+}
+
+func putUint16Hex(b []byte, v uint16) {
+	b[0] = hextable[byte(v>>8)>>4]
+	b[1] = hextable[byte(v>>8)&0x0f]
+	b[2] = hextable[byte(v)>>4]
+	b[3] = hextable[byte(v)&0x0f]
+}
+
+func putByteHex(dst, src []byte) {
+	for i := 0; i < len(src); i++ {
+		dst[i*2] = hextable[src[i]>>4]
+		dst[i*2+1] = hextable[src[i]&0x0f]
+	}
+}
+
+// IsEqualGUID compares two GUID.
+//
+// Not constant time comparison.
+func IsEqualGUID(guid1 *GUID, guid2 *GUID) bool {
+	return guid1.Data1 == guid2.Data1 &&
+		guid1.Data2 == guid2.Data2 &&
+		guid1.Data3 == guid2.Data3 &&
+		guid1.Data4[0] == guid2.Data4[0] &&
+		guid1.Data4[1] == guid2.Data4[1] &&
+		guid1.Data4[2] == guid2.Data4[2] &&
+		guid1.Data4[3] == guid2.Data4[3] &&
+		guid1.Data4[4] == guid2.Data4[4] &&
+		guid1.Data4[5] == guid2.Data4[5] &&
+		guid1.Data4[6] == guid2.Data4[6] &&
+		guid1.Data4[7] == guid2.Data4[7]
+}

vendor/github.com/go-ole/go-ole/iconnectionpoint.go

@@ -0,0 +1,20 @@
+package ole
+
+import "unsafe"
+
+type IConnectionPoint struct {
+	IUnknown
+}
+
+type IConnectionPointVtbl struct {
+	IUnknownVtbl
+	GetConnectionInterface      uintptr
+	GetConnectionPointContainer uintptr
+	Advise                      uintptr
+	Unadvise                    uintptr
+	EnumConnections             uintptr
+}
+
+func (v *IConnectionPoint) VTable() *IConnectionPointVtbl {
+	return (*IConnectionPointVtbl)(unsafe.Pointer(v.RawVTable))
+}

vendor/github.com/go-ole/go-ole/iconnectionpoint_func.go

@@ -0,0 +1,21 @@
+// +build !windows
+
+package ole
+
+import "unsafe"
+
+func (v *IConnectionPoint) GetConnectionInterface(piid **GUID) int32 {
+	return int32(0)
+}
+
+func (v *IConnectionPoint) Advise(unknown *IUnknown) (uint32, error) {
+	return uint32(0), NewError(E_NOTIMPL)
+}
+
+func (v *IConnectionPoint) Unadvise(cookie uint32) error {
+	return NewError(E_NOTIMPL)
+}
+
+func (v *IConnectionPoint) EnumConnections(p *unsafe.Pointer) (err error) {
+	return NewError(E_NOTIMPL)
+}

vendor/github.com/go-ole/go-ole/iconnectionpoint_windows.go

@@ -0,0 +1,43 @@
+// +build windows
+
+package ole
+
+import (
+	"syscall"
+	"unsafe"
+)
+
+func (v *IConnectionPoint) GetConnectionInterface(piid **GUID) int32 {
+	// XXX: This doesn't look like it does what it's supposed to
+	return release((*IUnknown)(unsafe.Pointer(v)))
+}
+
+func (v *IConnectionPoint) Advise(unknown *IUnknown) (cookie uint32, err error) {
+	hr, _, _ := syscall.Syscall(
+		v.VTable().Advise,
+		3,
+		uintptr(unsafe.Pointer(v)),
+		uintptr(unsafe.Pointer(unknown)),
+		uintptr(unsafe.Pointer(&cookie)))
+	if hr != 0 {
+		err = NewError(hr)
+	}
+	return
+}
+
+func (v *IConnectionPoint) Unadvise(cookie uint32) (err error) {
+	hr, _, _ := syscall.Syscall(
+		v.VTable().Unadvise,
+		2,
+		uintptr(unsafe.Pointer(v)),
+		uintptr(cookie),
+		0)
+	if hr != 0 {
+		err = NewError(hr)
+	}
+	return
+}
+
+func (v *IConnectionPoint) EnumConnections(p *unsafe.Pointer) error {
+	return NewError(E_NOTIMPL)
+}

vendor/github.com/go-ole/go-ole/iconnectionpointcontainer.go

@@ -0,0 +1,17 @@
+package ole
+
+import "unsafe"
+
+type IConnectionPointContainer struct {
+	IUnknown
+}
+
+type IConnectionPointContainerVtbl struct {
+	IUnknownVtbl
+	EnumConnectionPoints uintptr
+	FindConnectionPoint  uintptr
+}
+
+func (v *IConnectionPointContainer) VTable() *IConnectionPointContainerVtbl {
+	return (*IConnectionPointContainerVtbl)(unsafe.Pointer(v.RawVTable))
+}

vendor/github.com/go-ole/go-ole/iconnectionpointcontainer_func.go

@@ -0,0 +1,11 @@
+// +build !windows
+
+package ole
+
+func (v *IConnectionPointContainer) EnumConnectionPoints(points interface{}) error {
+	return NewError(E_NOTIMPL)
+}
+
+func (v *IConnectionPointContainer) FindConnectionPoint(iid *GUID, point **IConnectionPoint) error {
+	return NewError(E_NOTIMPL)
+}

vendor/github.com/go-ole/go-ole/iconnectionpointcontainer_windows.go

@@ -0,0 +1,25 @@
+// +build windows
+
+package ole
+
+import (
+	"syscall"
+	"unsafe"
+)
+
+func (v *IConnectionPointContainer) EnumConnectionPoints(points interface{}) error {
+	return NewError(E_NOTIMPL)
+}
+
+func (v *IConnectionPointContainer) FindConnectionPoint(iid *GUID, point **IConnectionPoint) (err error) {
+	hr, _, _ := syscall.Syscall(
+		v.VTable().FindConnectionPoint,
+		3,
+		uintptr(unsafe.Pointer(v)),
+		uintptr(unsafe.Pointer(iid)),
+		uintptr(unsafe.Pointer(point)))
+	if hr != 0 {
+		err = NewError(hr)
+	}
+	return
+}

vendor/github.com/go-ole/go-ole/idispatch.go

@@ -0,0 +1,94 @@
+package ole
+
+import "unsafe"
+
+type IDispatch struct {
+	IUnknown
+}
+
+type IDispatchVtbl struct {
+	IUnknownVtbl
+	GetTypeInfoCount uintptr
+	GetTypeInfo      uintptr
+	GetIDsOfNames    uintptr
+	Invoke           uintptr
+}
+
+func (v *IDispatch) VTable() *IDispatchVtbl {
+	return (*IDispatchVtbl)(unsafe.Pointer(v.RawVTable))
+}
+
+func (v *IDispatch) GetIDsOfName(names []string) (dispid []int32, err error) {
+	dispid, err = getIDsOfName(v, names)
+	return
+}
+
+func (v *IDispatch) Invoke(dispid int32, dispatch int16, params ...interface{}) (result *VARIANT, err error) {
+	result, err = invoke(v, dispid, dispatch, params...)
+	return
+}
+
+func (v *IDispatch) GetTypeInfoCount() (c uint32, err error) {
+	c, err = getTypeInfoCount(v)
+	return
+}
+
+func (v *IDispatch) GetTypeInfo() (tinfo *ITypeInfo, err error) {
+	tinfo, err = getTypeInfo(v)
+	return
+}
+
+// GetSingleIDOfName is a helper that returns single display ID for IDispatch name.
+//
+// This replaces the common pattern of attempting to get a single name from the list of available
+// IDs. It gives the first ID, if it is available.
+func (v *IDispatch) GetSingleIDOfName(name string) (displayID int32, err error) {
+	var displayIDs []int32
+	displayIDs, err = v.GetIDsOfName([]string{name})
+	if err != nil {
+		return
+	}
+	displayID = displayIDs[0]
+	return
+}
+
+// InvokeWithOptionalArgs accepts arguments as an array, works like Invoke.
+//
+// Accepts name and will attempt to retrieve Display ID to pass to Invoke.
+//
+// Passing params as an array is a workaround that could be fixed in later versions of Go that
+// prevent passing empty params. During testing it was discovered that this is an acceptable way of
+// getting around not being able to pass params normally.
+func (v *IDispatch) InvokeWithOptionalArgs(name string, dispatch int16, params []interface{}) (result *VARIANT, err error) {
+	displayID, err := v.GetSingleIDOfName(name)
+	if err != nil {
+		return
+	}
+
+	if len(params) < 1 {
+		result, err = v.Invoke(displayID, dispatch)
+	} else {
+		result, err = v.Invoke(displayID, dispatch, params...)
+	}
+
+	return
+}
+
+// CallMethod invokes named function with arguments on object.
+func (v *IDispatch) CallMethod(name string, params ...interface{}) (*VARIANT, error) {
+	return v.InvokeWithOptionalArgs(name, DISPATCH_METHOD, params)
+}
+
+// GetProperty retrieves the property with the name with the ability to pass arguments.
+//
+// Most of the time you will not need to pass arguments as most objects do not allow for this
+// feature. Or at least, should not allow for this feature. Some servers don't follow best practices
+// and this is provided for those edge cases.
+func (v *IDispatch) GetProperty(name string, params ...interface{}) (*VARIANT, error) {
+	return v.InvokeWithOptionalArgs(name, DISPATCH_PROPERTYGET, params)
+}
+
+// PutProperty attempts to mutate a property in the object.
+func (v *IDispatch) PutProperty(name string, params ...interface{}) (*VARIANT, error) {
+	return v.InvokeWithOptionalArgs(name, DISPATCH_PROPERTYPUT, params)
+}

vendor/github.com/go-ole/go-ole/idispatch_func.go

@@ -0,0 +1,19 @@
+// +build !windows
+
+package ole
+
+func getIDsOfName(disp *IDispatch, names []string) ([]int32, error) {
+	return []int32{}, NewError(E_NOTIMPL)
+}
+
+func getTypeInfoCount(disp *IDispatch) (uint32, error) {
+	return uint32(0), NewError(E_NOTIMPL)
+}
+
+func getTypeInfo(disp *IDispatch) (*ITypeInfo, error) {
+	return nil, NewError(E_NOTIMPL)
+}
+
+func invoke(disp *IDispatch, dispid int32, dispatch int16, params ...interface{}) (*VARIANT, error) {
+	return nil, NewError(E_NOTIMPL)
+}

vendor/github.com/go-ole/go-ole/idispatch_windows.go

@@ -0,0 +1,200 @@
+// +build windows
+
+package ole
+
+import (
+	"math/big"
+	"syscall"
+	"time"
+	"unsafe"
+)
+
+func getIDsOfName(disp *IDispatch, names []string) (dispid []int32, err error) {
+	wnames := make([]*uint16, len(names))
+	for i := 0; i < len(names); i++ {
+		wnames[i] = syscall.StringToUTF16Ptr(names[i])
+	}
+	dispid = make([]int32, len(names))
+	namelen := uint32(len(names))
+	hr, _, _ := syscall.Syscall6(
+		disp.VTable().GetIDsOfNames,
+		6,
+		uintptr(unsafe.Pointer(disp)),
+		uintptr(unsafe.Pointer(IID_NULL)),
+		uintptr(unsafe.Pointer(&wnames[0])),
+		uintptr(namelen),
+		uintptr(GetUserDefaultLCID()),
+		uintptr(unsafe.Pointer(&dispid[0])))
+	if hr != 0 {
+		err = NewError(hr)
+	}
+	return
+}
+
+func getTypeInfoCount(disp *IDispatch) (c uint32, err error) {
+	hr, _, _ := syscall.Syscall(
+		disp.VTable().GetTypeInfoCount,
+		2,
+		uintptr(unsafe.Pointer(disp)),
+		uintptr(unsafe.Pointer(&c)),
+		0)
+	if hr != 0 {
+		err = NewError(hr)
+	}
+	return
+}
+
+func getTypeInfo(disp *IDispatch) (tinfo *ITypeInfo, err error) {
+	hr, _, _ := syscall.Syscall(
+		disp.VTable().GetTypeInfo,
+		3,
+		uintptr(unsafe.Pointer(disp)),
+		uintptr(GetUserDefaultLCID()),
+		uintptr(unsafe.Pointer(&tinfo)))
+	if hr != 0 {
+		err = NewError(hr)
+	}
+	return
+}
+
+func invoke(disp *IDispatch, dispid int32, dispatch int16, params ...interface{}) (result *VARIANT, err error) {
+	var dispparams DISPPARAMS
+
+	if dispatch&DISPATCH_PROPERTYPUT != 0 {
+		dispnames := [1]int32{DISPID_PROPERTYPUT}
+		dispparams.rgdispidNamedArgs = uintptr(unsafe.Pointer(&dispnames[0]))
+		dispparams.cNamedArgs = 1
+	} else if dispatch&DISPATCH_PROPERTYPUTREF != 0 {
+		dispnames := [1]int32{DISPID_PROPERTYPUT}
+		dispparams.rgdispidNamedArgs = uintptr(unsafe.Pointer(&dispnames[0]))
+		dispparams.cNamedArgs = 1
+	}
+	var vargs []VARIANT
+	if len(params) > 0 {
+		vargs = make([]VARIANT, len(params))
+		for i, v := range params {
+			//n := len(params)-i-1
+			n := len(params) - i - 1
+			VariantInit(&vargs[n])
+			switch vv := v.(type) {
+			case bool:
+				if vv {
+					vargs[n] = NewVariant(VT_BOOL, 0xffff)
+				} else {
+					vargs[n] = NewVariant(VT_BOOL, 0)
+				}
+			case *bool:
+				vargs[n] = NewVariant(VT_BOOL|VT_BYREF, int64(uintptr(unsafe.Pointer(v.(*bool)))))
+			case uint8:
+				vargs[n] = NewVariant(VT_I1, int64(v.(uint8)))
+			case *uint8:
+				vargs[n] = NewVariant(VT_I1|VT_BYREF, int64(uintptr(unsafe.Pointer(v.(*uint8)))))
+			case int8:
+				vargs[n] = NewVariant(VT_I1, int64(v.(int8)))
+			case *int8:
+				vargs[n] = NewVariant(VT_I1|VT_BYREF, int64(uintptr(unsafe.Pointer(v.(*uint8)))))
+			case int16:
+				vargs[n] = NewVariant(VT_I2, int64(v.(int16)))
+			case *int16:
+				vargs[n] = NewVariant(VT_I2|VT_BYREF, int64(uintptr(unsafe.Pointer(v.(*int16)))))
+			case uint16:
+				vargs[n] = NewVariant(VT_UI2, int64(v.(uint16)))
+			case *uint16:
+				vargs[n] = NewVariant(VT_UI2|VT_BYREF, int64(uintptr(unsafe.Pointer(v.(*uint16)))))
+			case int32:
+				vargs[n] = NewVariant(VT_I4, int64(v.(int32)))
+			case *int32:
+				vargs[n] = NewVariant(VT_I4|VT_BYREF, int64(uintptr(unsafe.Pointer(v.(*int32)))))
+			case uint32:
+				vargs[n] = NewVariant(VT_UI4, int64(v.(uint32)))
+			case *uint32:
+				vargs[n] = NewVariant(VT_UI4|VT_BYREF, int64(uintptr(unsafe.Pointer(v.(*uint32)))))
+			case int64:
+				vargs[n] = NewVariant(VT_I8, int64(v.(int64)))
+			case *int64:
+				vargs[n] = NewVariant(VT_I8|VT_BYREF, int64(uintptr(unsafe.Pointer(v.(*int64)))))
+			case uint64:
+				vargs[n] = NewVariant(VT_UI8, int64(uintptr(v.(uint64))))
+			case *uint64:
+				vargs[n] = NewVariant(VT_UI8|VT_BYREF, int64(uintptr(unsafe.Pointer(v.(*uint64)))))
+			case int:
+				vargs[n] = NewVariant(VT_I4, int64(v.(int)))
+			case *int:
+				vargs[n] = NewVariant(VT_I4|VT_BYREF, int64(uintptr(unsafe.Pointer(v.(*int)))))
+			case uint:
+				vargs[n] = NewVariant(VT_UI4, int64(v.(uint)))
+			case *uint:
+				vargs[n] = NewVariant(VT_UI4|VT_BYREF, int64(uintptr(unsafe.Pointer(v.(*uint)))))
+			case float32:
+				vargs[n] = NewVariant(VT_R4, *(*int64)(unsafe.Pointer(&vv)))
+			case *float32:
+				vargs[n] = NewVariant(VT_R4|VT_BYREF, int64(uintptr(unsafe.Pointer(v.(*float32)))))
+			case float64:
+				vargs[n] = NewVariant(VT_R8, *(*int64)(unsafe.Pointer(&vv)))
+			case *float64:
+				vargs[n] = NewVariant(VT_R8|VT_BYREF, int64(uintptr(unsafe.Pointer(v.(*float64)))))
+			case *big.Int:
+				vargs[n] = NewVariant(VT_DECIMAL, v.(*big.Int).Int64())
+			case string:
+				vargs[n] = NewVariant(VT_BSTR, int64(uintptr(unsafe.Pointer(SysAllocStringLen(v.(string))))))
+			case *string:
+				vargs[n] = NewVariant(VT_BSTR|VT_BYREF, int64(uintptr(unsafe.Pointer(v.(*string)))))
+			case time.Time:
+				s := vv.Format("2006-01-02 15:04:05")
+				vargs[n] = NewVariant(VT_BSTR, int64(uintptr(unsafe.Pointer(SysAllocStringLen(s)))))
+			case *time.Time:
+				s := vv.Format("2006-01-02 15:04:05")
+				vargs[n] = NewVariant(VT_BSTR|VT_BYREF, int64(uintptr(unsafe.Pointer(&s))))
+			case *IDispatch:
+				vargs[n] = NewVariant(VT_DISPATCH, int64(uintptr(unsafe.Pointer(v.(*IDispatch)))))
+			case **IDispatch:
+				vargs[n] = NewVariant(VT_DISPATCH|VT_BYREF, int64(uintptr(unsafe.Pointer(v.(**IDispatch)))))
+			case nil:
+				vargs[n] = NewVariant(VT_NULL, 0)
+			case *VARIANT:
+				vargs[n] = NewVariant(VT_VARIANT|VT_BYREF, int64(uintptr(unsafe.Pointer(v.(*VARIANT)))))
+			case []byte:
+				safeByteArray := safeArrayFromByteSlice(v.([]byte))
+				vargs[n] = NewVariant(VT_ARRAY|VT_UI1, int64(uintptr(unsafe.Pointer(safeByteArray))))
+				defer VariantClear(&vargs[n])
+			case []string:
+				safeByteArray := safeArrayFromStringSlice(v.([]string))
+				vargs[n] = NewVariant(VT_ARRAY|VT_BSTR, int64(uintptr(unsafe.Pointer(safeByteArray))))
+				defer VariantClear(&vargs[n])
+			default:
+				panic("unknown type")
+			}
+		}
+		dispparams.rgvarg = uintptr(unsafe.Pointer(&vargs[0]))
+		dispparams.cArgs = uint32(len(params))
+	}
+
+	result = new(VARIANT)
+	var excepInfo EXCEPINFO
+	VariantInit(result)
+	hr, _, _ := syscall.Syscall9(
+		disp.VTable().Invoke,
+		9,
+		uintptr(unsafe.Pointer(disp)),
+		uintptr(dispid),
+		uintptr(unsafe.Pointer(IID_NULL)),
+		uintptr(GetUserDefaultLCID()),
+		uintptr(dispatch),
+		uintptr(unsafe.Pointer(&dispparams)),
+		uintptr(unsafe.Pointer(result)),
+		uintptr(unsafe.Pointer(&excepInfo)),
+		0)
+	if hr != 0 {
+		err = NewErrorWithSubError(hr, BstrToString(excepInfo.bstrDescription), excepInfo)
+	}
+	for i, varg := range vargs {
+		n := len(params) - i - 1
+		if varg.VT == VT_BSTR && varg.Val != 0 {
+			SysFreeString(((*int16)(unsafe.Pointer(uintptr(varg.Val)))))
+		}
+		if varg.VT == (VT_BSTR|VT_BYREF) && varg.Val != 0 {
+			*(params[n].(*string)) = LpOleStrToString(*(**uint16)(unsafe.Pointer(uintptr(varg.Val))))
+		}
+	}
+	return
+}

vendor/github.com/go-ole/go-ole/ienumvariant.go

@@ -0,0 +1,19 @@
+package ole
+
+import "unsafe"
+
+type IEnumVARIANT struct {
+	IUnknown
+}
+
+type IEnumVARIANTVtbl struct {
+	IUnknownVtbl
+	Next  uintptr
+	Skip  uintptr
+	Reset uintptr
+	Clone uintptr
+}
+
+func (v *IEnumVARIANT) VTable() *IEnumVARIANTVtbl {
+	return (*IEnumVARIANTVtbl)(unsafe.Pointer(v.RawVTable))
+}

vendor/github.com/go-ole/go-ole/ienumvariant_func.go

@@ -0,0 +1,19 @@
+// +build !windows
+
+package ole
+
+func (enum *IEnumVARIANT) Clone() (*IEnumVARIANT, error) {
+	return nil, NewError(E_NOTIMPL)
+}
+
+func (enum *IEnumVARIANT) Reset() error {
+	return NewError(E_NOTIMPL)
+}
+
+func (enum *IEnumVARIANT) Skip(celt uint) error {
+	return NewError(E_NOTIMPL)
+}
+
+func (enum *IEnumVARIANT) Next(celt uint) (VARIANT, uint, error) {
+	return NewVariant(VT_NULL, int64(0)), 0, NewError(E_NOTIMPL)
+}

vendor/github.com/go-ole/go-ole/ienumvariant_windows.go

@@ -0,0 +1,63 @@
+// +build windows
+
+package ole
+
+import (
+	"syscall"
+	"unsafe"
+)
+
+func (enum *IEnumVARIANT) Clone() (cloned *IEnumVARIANT, err error) {
+	hr, _, _ := syscall.Syscall(
+		enum.VTable().Clone,
+		2,
+		uintptr(unsafe.Pointer(enum)),
+		uintptr(unsafe.Pointer(&cloned)),
+		0)
+	if hr != 0 {
+		err = NewError(hr)
+	}
+	return
+}
+
+func (enum *IEnumVARIANT) Reset() (err error) {
+	hr, _, _ := syscall.Syscall(
+		enum.VTable().Reset,
+		1,
+		uintptr(unsafe.Pointer(enum)),
+		0,
+		0)
+	if hr != 0 {
+		err = NewError(hr)
+	}
+	return
+}
+
+func (enum *IEnumVARIANT) Skip(celt uint) (err error) {
+	hr, _, _ := syscall.Syscall(
+		enum.VTable().Skip,
+		2,
+		uintptr(unsafe.Pointer(enum)),
+		uintptr(celt),
+		0)
+	if hr != 0 {
+		err = NewError(hr)
+	}
+	return
+}
+
+func (enum *IEnumVARIANT) Next(celt uint) (array VARIANT, length uint, err error) {
+	hr, _, _ := syscall.Syscall6(
+		enum.VTable().Next,
+		4,
+		uintptr(unsafe.Pointer(enum)),
+		uintptr(celt),
+		uintptr(unsafe.Pointer(&array)),
+		uintptr(unsafe.Pointer(&length)),
+		0,
+		0)
+	if hr != 0 {
+		err = NewError(hr)
+	}
+	return
+}

vendor/github.com/go-ole/go-ole/iinspectable.go

@@ -0,0 +1,18 @@
+package ole
+
+import "unsafe"
+
+type IInspectable struct {
+	IUnknown
+}
+
+type IInspectableVtbl struct {
+	IUnknownVtbl
+	GetIIds             uintptr
+	GetRuntimeClassName uintptr
+	GetTrustLevel       uintptr
+}
+
+func (v *IInspectable) VTable() *IInspectableVtbl {
+	return (*IInspectableVtbl)(unsafe.Pointer(v.RawVTable))
+}

vendor/github.com/go-ole/go-ole/iinspectable_func.go

@@ -0,0 +1,15 @@
+// +build !windows
+
+package ole
+
+func (v *IInspectable) GetIids() ([]*GUID, error) {
+	return []*GUID{}, NewError(E_NOTIMPL)
+}
+
+func (v *IInspectable) GetRuntimeClassName() (string, error) {
+	return "", NewError(E_NOTIMPL)
+}
+
+func (v *IInspectable) GetTrustLevel() (uint32, error) {
+	return uint32(0), NewError(E_NOTIMPL)
+}

vendor/github.com/go-ole/go-ole/iinspectable_windows.go

@@ -0,0 +1,72 @@
+// +build windows
+
+package ole
+
+import (
+	"bytes"
+	"encoding/binary"
+	"reflect"
+	"syscall"
+	"unsafe"
+)
+
+func (v *IInspectable) GetIids() (iids []*GUID, err error) {
+	var count uint32
+	var array uintptr
+	hr, _, _ := syscall.Syscall(
+		v.VTable().GetIIds,
+		3,
+		uintptr(unsafe.Pointer(v)),
+		uintptr(unsafe.Pointer(&count)),
+		uintptr(unsafe.Pointer(&array)))
+	if hr != 0 {
+		err = NewError(hr)
+		return
+	}
+	defer CoTaskMemFree(array)
+
+	iids = make([]*GUID, count)
+	byteCount := count * uint32(unsafe.Sizeof(GUID{}))
+	slicehdr := reflect.SliceHeader{Data: array, Len: int(byteCount), Cap: int(byteCount)}
+	byteSlice := *(*[]byte)(unsafe.Pointer(&slicehdr))
+	reader := bytes.NewReader(byteSlice)
+	for i := range iids {
+		guid := GUID{}
+		err = binary.Read(reader, binary.LittleEndian, &guid)
+		if err != nil {
+			return
+		}
+		iids[i] = &guid
+	}
+	return
+}
+
+func (v *IInspectable) GetRuntimeClassName() (s string, err error) {
+	var hstring HString
+	hr, _, _ := syscall.Syscall(
+		v.VTable().GetRuntimeClassName,
+		2,
+		uintptr(unsafe.Pointer(v)),
+		uintptr(unsafe.Pointer(&hstring)),
+		0)
+	if hr != 0 {
+		err = NewError(hr)
+		return
+	}
+	s = hstring.String()
+	DeleteHString(hstring)
+	return
+}
+
+func (v *IInspectable) GetTrustLevel() (level uint32, err error) {
+	hr, _, _ := syscall.Syscall(
+		v.VTable().GetTrustLevel,
+		2,
+		uintptr(unsafe.Pointer(v)),
+		uintptr(unsafe.Pointer(&level)),
+		0)
+	if hr != 0 {
+		err = NewError(hr)
+	}
+	return
+}

vendor/github.com/go-ole/go-ole/iprovideclassinfo.go

@@ -0,0 +1,21 @@
+package ole
+
+import "unsafe"
+
+type IProvideClassInfo struct {
+	IUnknown
+}
+
+type IProvideClassInfoVtbl struct {
+	IUnknownVtbl
+	GetClassInfo uintptr
+}
+
+func (v *IProvideClassInfo) VTable() *IProvideClassInfoVtbl {
+	return (*IProvideClassInfoVtbl)(unsafe.Pointer(v.RawVTable))
+}
+
+func (v *IProvideClassInfo) GetClassInfo() (cinfo *ITypeInfo, err error) {
+	cinfo, err = getClassInfo(v)
+	return
+}

vendor/github.com/go-ole/go-ole/iprovideclassinfo_func.go

@@ -0,0 +1,7 @@
+// +build !windows
+
+package ole
+
+func getClassInfo(disp *IProvideClassInfo) (tinfo *ITypeInfo, err error) {
+	return nil, NewError(E_NOTIMPL)
+}

vendor/github.com/go-ole/go-ole/iprovideclassinfo_windows.go

@@ -0,0 +1,21 @@
+// +build windows
+
+package ole
+
+import (
+	"syscall"
+	"unsafe"
+)
+
+func getClassInfo(disp *IProvideClassInfo) (tinfo *ITypeInfo, err error) {
+	hr, _, _ := syscall.Syscall(
+		disp.VTable().GetClassInfo,
+		2,
+		uintptr(unsafe.Pointer(disp)),
+		uintptr(unsafe.Pointer(&tinfo)),
+		0)
+	if hr != 0 {
+		err = NewError(hr)
+	}
+	return
+}

vendor/github.com/go-ole/go-ole/itypeinfo.go

@@ -0,0 +1,34 @@
+package ole
+
+import "unsafe"
+
+type ITypeInfo struct {
+	IUnknown
+}
+
+type ITypeInfoVtbl struct {
+	IUnknownVtbl
+	GetTypeAttr          uintptr
+	GetTypeComp          uintptr
+	GetFuncDesc          uintptr
+	GetVarDesc           uintptr
+	GetNames             uintptr
+	GetRefTypeOfImplType uintptr
+	GetImplTypeFlags     uintptr
+	GetIDsOfNames        uintptr
+	Invoke               uintptr
+	GetDocumentation     uintptr
+	GetDllEntry          uintptr
+	GetRefTypeInfo       uintptr
+	AddressOfMember      uintptr
+	CreateInstance       uintptr
+	GetMops              uintptr
+	GetContainingTypeLib uintptr
+	ReleaseTypeAttr      uintptr
+	ReleaseFuncDesc      uintptr
+	ReleaseVarDesc       uintptr
+}
+
+func (v *ITypeInfo) VTable() *ITypeInfoVtbl {
+	return (*ITypeInfoVtbl)(unsafe.Pointer(v.RawVTable))
+}

vendor/github.com/go-ole/go-ole/itypeinfo_func.go

@@ -0,0 +1,7 @@
+// +build !windows
+
+package ole
+
+func (v *ITypeInfo) GetTypeAttr() (*TYPEATTR, error) {
+	return nil, NewError(E_NOTIMPL)
+}

vendor/github.com/go-ole/go-ole/itypeinfo_windows.go

@@ -0,0 +1,21 @@
+// +build windows
+
+package ole
+
+import (
+	"syscall"
+	"unsafe"
+)
+
+func (v *ITypeInfo) GetTypeAttr() (tattr *TYPEATTR, err error) {
+	hr, _, _ := syscall.Syscall(
+		uintptr(v.VTable().GetTypeAttr),
+		2,
+		uintptr(unsafe.Pointer(v)),
+		uintptr(unsafe.Pointer(&tattr)),
+		0)
+	if hr != 0 {
+		err = NewError(hr)
+	}
+	return
+}

vendor/github.com/go-ole/go-ole/iunknown.go

@@ -0,0 +1,57 @@
+package ole
+
+import "unsafe"
+
+type IUnknown struct {
+	RawVTable *interface{}
+}
+
+type IUnknownVtbl struct {
+	QueryInterface uintptr
+	AddRef         uintptr
+	Release        uintptr
+}
+
+type UnknownLike interface {
+	QueryInterface(iid *GUID) (disp *IDispatch, err error)
+	AddRef() int32
+	Release() int32
+}
+
+func (v *IUnknown) VTable() *IUnknownVtbl {
+	return (*IUnknownVtbl)(unsafe.Pointer(v.RawVTable))
+}
+
+func (v *IUnknown) PutQueryInterface(interfaceID *GUID, obj interface{}) error {
+	return reflectQueryInterface(v, v.VTable().QueryInterface, interfaceID, obj)
+}
+
+func (v *IUnknown) IDispatch(interfaceID *GUID) (dispatch *IDispatch, err error) {
+	err = v.PutQueryInterface(interfaceID, &dispatch)
+	return
+}
+
+func (v *IUnknown) IEnumVARIANT(interfaceID *GUID) (enum *IEnumVARIANT, err error) {
+	err = v.PutQueryInterface(interfaceID, &enum)
+	return
+}
+
+func (v *IUnknown) QueryInterface(iid *GUID) (*IDispatch, error) {
+	return queryInterface(v, iid)
+}
+
+func (v *IUnknown) MustQueryInterface(iid *GUID) (disp *IDispatch) {
+	unk, err := queryInterface(v, iid)
+	if err != nil {
+		panic(err)
+	}
+	return unk
+}
+
+func (v *IUnknown) AddRef() int32 {
+	return addRef(v)
+}
+
+func (v *IUnknown) Release() int32 {
+	return release(v)
+}

vendor/github.com/go-ole/go-ole/iunknown_func.go

@@ -0,0 +1,19 @@
+// +build !windows
+
+package ole
+
+func reflectQueryInterface(self interface{}, method uintptr, interfaceID *GUID, obj interface{}) (err error) {
+	return NewError(E_NOTIMPL)
+}
+
+func queryInterface(unk *IUnknown, iid *GUID) (disp *IDispatch, err error) {
+	return nil, NewError(E_NOTIMPL)
+}
+
+func addRef(unk *IUnknown) int32 {
+	return 0
+}
+
+func release(unk *IUnknown) int32 {
+	return 0
+}

vendor/github.com/go-ole/go-ole/iunknown_windows.go

@@ -0,0 +1,58 @@
+// +build windows
+
+package ole
+
+import (
+	"reflect"
+	"syscall"
+	"unsafe"
+)
+
+func reflectQueryInterface(self interface{}, method uintptr, interfaceID *GUID, obj interface{}) (err error) {
+	selfValue := reflect.ValueOf(self).Elem()
+	objValue := reflect.ValueOf(obj).Elem()
+
+	hr, _, _ := syscall.Syscall(
+		method,
+		3,
+		selfValue.UnsafeAddr(),
+		uintptr(unsafe.Pointer(interfaceID)),
+		objValue.Addr().Pointer())
+	if hr != 0 {
+		err = NewError(hr)
+	}
+	return
+}
+
+func queryInterface(unk *IUnknown, iid *GUID) (disp *IDispatch, err error) {
+	hr, _, _ := syscall.Syscall(
+		unk.VTable().QueryInterface,
+		3,
+		uintptr(unsafe.Pointer(unk)),
+		uintptr(unsafe.Pointer(iid)),
+		uintptr(unsafe.Pointer(&disp)))
+	if hr != 0 {
+		err = NewError(hr)
+	}
+	return
+}
+
+func addRef(unk *IUnknown) int32 {
+	ret, _, _ := syscall.Syscall(
+		unk.VTable().AddRef,
+		1,
+		uintptr(unsafe.Pointer(unk)),
+		0,
+		0)
+	return int32(ret)
+}
+
+func release(unk *IUnknown) int32 {
+	ret, _, _ := syscall.Syscall(
+		unk.VTable().Release,
+		1,
+		uintptr(unsafe.Pointer(unk)),
+		0,
+		0)
+	return int32(ret)
+}

vendor/github.com/go-ole/go-ole/ole.go

@@ -0,0 +1,157 @@
+package ole
+
+import (
+	"fmt"
+	"strings"
+)
+
+// DISPPARAMS are the arguments that passed to methods or property.
+type DISPPARAMS struct {
+	rgvarg            uintptr
+	rgdispidNamedArgs uintptr
+	cArgs             uint32
+	cNamedArgs        uint32
+}
+
+// EXCEPINFO defines exception info.
+type EXCEPINFO struct {
+	wCode             uint16
+	wReserved         uint16
+	bstrSource        *uint16
+	bstrDescription   *uint16
+	bstrHelpFile      *uint16
+	dwHelpContext     uint32
+	pvReserved        uintptr
+	pfnDeferredFillIn uintptr
+	scode             uint32
+}
+
+// WCode return wCode in EXCEPINFO.
+func (e EXCEPINFO) WCode() uint16 {
+	return e.wCode
+}
+
+// SCODE return scode in EXCEPINFO.
+func (e EXCEPINFO) SCODE() uint32 {
+	return e.scode
+}
+
+// String convert EXCEPINFO to string.
+func (e EXCEPINFO) String() string {
+	var src, desc, hlp string
+	if e.bstrSource == nil {
+		src = "<nil>"
+	} else {
+		src = BstrToString(e.bstrSource)
+	}
+
+	if e.bstrDescription == nil {
+		desc = "<nil>"
+	} else {
+		desc = BstrToString(e.bstrDescription)
+	}
+
+	if e.bstrHelpFile == nil {
+		hlp = "<nil>"
+	} else {
+		hlp = BstrToString(e.bstrHelpFile)
+	}
+
+	return fmt.Sprintf(
+		"wCode: %#x, bstrSource: %v, bstrDescription: %v, bstrHelpFile: %v, dwHelpContext: %#x, scode: %#x",
+		e.wCode, src, desc, hlp, e.dwHelpContext, e.scode,
+	)
+}
+
+// Error implements error interface and returns error string.
+func (e EXCEPINFO) Error() string {
+	if e.bstrDescription != nil {
+		return strings.TrimSpace(BstrToString(e.bstrDescription))
+	}
+
+	src := "Unknown"
+	if e.bstrSource != nil {
+		src = BstrToString(e.bstrSource)
+	}
+
+	code := e.scode
+	if e.wCode != 0 {
+		code = uint32(e.wCode)
+	}
+
+	return fmt.Sprintf("%v: %#x", src, code)
+}
+
+// PARAMDATA defines parameter data type.
+type PARAMDATA struct {
+	Name *int16
+	Vt   uint16
+}
+
+// METHODDATA defines method info.
+type METHODDATA struct {
+	Name     *uint16
+	Data     *PARAMDATA
+	Dispid   int32
+	Meth     uint32
+	CC       int32
+	CArgs    uint32
+	Flags    uint16
+	VtReturn uint32
+}
+
+// INTERFACEDATA defines interface info.
+type INTERFACEDATA struct {
+	MethodData *METHODDATA
+	CMembers   uint32
+}
+
+// Point is 2D vector type.
+type Point struct {
+	X int32
+	Y int32
+}
+
+// Msg is message between processes.
+type Msg struct {
+	Hwnd    uint32
+	Message uint32
+	Wparam  int32
+	Lparam  int32
+	Time    uint32
+	Pt      Point
+}
+
+// TYPEDESC defines data type.
+type TYPEDESC struct {
+	Hreftype uint32
+	VT       uint16
+}
+
+// IDLDESC defines IDL info.
+type IDLDESC struct {
+	DwReserved uint32
+	WIDLFlags  uint16
+}
+
+// TYPEATTR defines type info.
+type TYPEATTR struct {
+	Guid             GUID
+	Lcid             uint32
+	dwReserved       uint32
+	MemidConstructor int32
+	MemidDestructor  int32
+	LpstrSchema      *uint16
+	CbSizeInstance   uint32
+	Typekind         int32
+	CFuncs           uint16
+	CVars            uint16
+	CImplTypes       uint16
+	CbSizeVft        uint16
+	CbAlignment      uint16
+	WTypeFlags       uint16
+	WMajorVerNum     uint16
+	WMinorVerNum     uint16
+	TdescAlias       TYPEDESC
+	IdldescType      IDLDESC
+}

vendor/github.com/go-ole/go-ole/oleutil/connection.go

@@ -0,0 +1,100 @@
+// +build windows
+
+package oleutil
+
+import (
+	"reflect"
+	"unsafe"
+
+	ole "github.com/go-ole/go-ole"
+)
+
+type stdDispatch struct {
+	lpVtbl  *stdDispatchVtbl
+	ref     int32
+	iid     *ole.GUID
+	iface   interface{}
+	funcMap map[string]int32
+}
+
+type stdDispatchVtbl struct {
+	pQueryInterface   uintptr
+	pAddRef           uintptr
+	pRelease          uintptr
+	pGetTypeInfoCount uintptr
+	pGetTypeInfo      uintptr
+	pGetIDsOfNames    uintptr
+	pInvoke           uintptr
+}
+
+func dispQueryInterface(this *ole.IUnknown, iid *ole.GUID, punk **ole.IUnknown) uint32 {
+	pthis := (*stdDispatch)(unsafe.Pointer(this))
+	*punk = nil
+	if ole.IsEqualGUID(iid, ole.IID_IUnknown) ||
+		ole.IsEqualGUID(iid, ole.IID_IDispatch) {
+		dispAddRef(this)
+		*punk = this
+		return ole.S_OK
+	}
+	if ole.IsEqualGUID(iid, pthis.iid) {
+		dispAddRef(this)
+		*punk = this
+		return ole.S_OK
+	}
+	return ole.E_NOINTERFACE
+}
+
+func dispAddRef(this *ole.IUnknown) int32 {
+	pthis := (*stdDispatch)(unsafe.Pointer(this))
+	pthis.ref++
+	return pthis.ref
+}
+
+func dispRelease(this *ole.IUnknown) int32 {
+	pthis := (*stdDispatch)(unsafe.Pointer(this))
+	pthis.ref--
+	return pthis.ref
+}
+
+func dispGetIDsOfNames(this *ole.IUnknown, iid *ole.GUID, wnames []*uint16, namelen int, lcid int, pdisp []int32) uintptr {
+	pthis := (*stdDispatch)(unsafe.Pointer(this))
+	names := make([]string, len(wnames))
+	for i := 0; i < len(names); i++ {
+		names[i] = ole.LpOleStrToString(wnames[i])
+	}
+	for n := 0; n < namelen; n++ {
+		if id, ok := pthis.funcMap[names[n]]; ok {
+			pdisp[n] = id
+		}
+	}
+	return ole.S_OK
+}
+
+func dispGetTypeInfoCount(pcount *int) uintptr {
+	if pcount != nil {
+		*pcount = 0
+	}
+	return ole.S_OK
+}
+
+func dispGetTypeInfo(ptypeif *uintptr) uintptr {
+	return ole.E_NOTIMPL
+}
+
+func dispInvoke(this *ole.IDispatch, dispid int32, riid *ole.GUID, lcid int, flags int16, dispparams *ole.DISPPARAMS, result *ole.VARIANT, pexcepinfo *ole.EXCEPINFO, nerr *uint) uintptr {
+	pthis := (*stdDispatch)(unsafe.Pointer(this))
+	found := ""
+	for name, id := range pthis.funcMap {
+		if id == dispid {
+			found = name
+		}
+	}
+	if found != "" {
+		rv := reflect.ValueOf(pthis.iface).Elem()
+		rm := rv.MethodByName(found)
+		rr := rm.Call([]reflect.Value{})
+		println(len(rr))
+		return ole.S_OK
+	}
+	return ole.E_NOTIMPL
+}

vendor/github.com/go-ole/go-ole/oleutil/connection_func.go

@@ -0,0 +1,10 @@
+// +build !windows
+
+package oleutil
+
+import ole "github.com/go-ole/go-ole"
+
+// ConnectObject creates a connection point between two services for communication.
+func ConnectObject(disp *ole.IDispatch, iid *ole.GUID, idisp interface{}) (uint32, error) {
+	return 0, ole.NewError(ole.E_NOTIMPL)
+}

vendor/github.com/go-ole/go-ole/oleutil/connection_windows.go

@@ -0,0 +1,58 @@
+// +build windows
+
+package oleutil
+
+import (
+	"reflect"
+	"syscall"
+	"unsafe"
+
+	ole "github.com/go-ole/go-ole"
+)
+
+// ConnectObject creates a connection point between two services for communication.
+func ConnectObject(disp *ole.IDispatch, iid *ole.GUID, idisp interface{}) (cookie uint32, err error) {
+	unknown, err := disp.QueryInterface(ole.IID_IConnectionPointContainer)
+	if err != nil {
+		return
+	}
+
+	container := (*ole.IConnectionPointContainer)(unsafe.Pointer(unknown))
+	var point *ole.IConnectionPoint
+	err = container.FindConnectionPoint(iid, &point)
+	if err != nil {
+		return
+	}
+	if edisp, ok := idisp.(*ole.IUnknown); ok {
+		cookie, err = point.Advise(edisp)
+		container.Release()
+		if err != nil {
+			return
+		}
+	}
+	rv := reflect.ValueOf(disp).Elem()
+	if rv.Type().Kind() == reflect.Struct {
+		dest := &stdDispatch{}
+		dest.lpVtbl = &stdDispatchVtbl{}
+		dest.lpVtbl.pQueryInterface = syscall.NewCallback(dispQueryInterface)
+		dest.lpVtbl.pAddRef = syscall.NewCallback(dispAddRef)
+		dest.lpVtbl.pRelease = syscall.NewCallback(dispRelease)
+		dest.lpVtbl.pGetTypeInfoCount = syscall.NewCallback(dispGetTypeInfoCount)
+		dest.lpVtbl.pGetTypeInfo = syscall.NewCallback(dispGetTypeInfo)
+		dest.lpVtbl.pGetIDsOfNames = syscall.NewCallback(dispGetIDsOfNames)
+		dest.lpVtbl.pInvoke = syscall.NewCallback(dispInvoke)
+		dest.iface = disp
+		dest.iid = iid
+		cookie, err = point.Advise((*ole.IUnknown)(unsafe.Pointer(dest)))
+		container.Release()
+		if err != nil {
+			point.Release()
+			return
+		}
+		return
+	}
+
+	container.Release()
+
+	return 0, ole.NewError(ole.E_INVALIDARG)
+}

vendor/github.com/go-ole/go-ole/oleutil/go-get.go

@@ -0,0 +1,6 @@
+// This file is here so go get succeeds as without it errors with:
+// no buildable Go source files in ...
+//
+// +build !windows
+
+package oleutil

vendor/github.com/go-ole/go-ole/oleutil/oleutil.go

@@ -0,0 +1,127 @@
+package oleutil
+
+import ole "github.com/go-ole/go-ole"
+
+// ClassIDFrom retrieves class ID whether given is program ID or application string.
+func ClassIDFrom(programID string) (classID *ole.GUID, err error) {
+	return ole.ClassIDFrom(programID)
+}
+
+// CreateObject creates object from programID based on interface type.
+//
+// Only supports IUnknown.
+//
+// Program ID can be either program ID or application string.
+func CreateObject(programID string) (unknown *ole.IUnknown, err error) {
+	classID, err := ole.ClassIDFrom(programID)
+	if err != nil {
+		return
+	}
+
+	unknown, err = ole.CreateInstance(classID, ole.IID_IUnknown)
+	if err != nil {
+		return
+	}
+
+	return
+}
+
+// GetActiveObject retrieves active object for program ID and interface ID based
+// on interface type.
+//
+// Only supports IUnknown.
+//
+// Program ID can be either program ID or application string.
+func GetActiveObject(programID string) (unknown *ole.IUnknown, err error) {
+	classID, err := ole.ClassIDFrom(programID)
+	if err != nil {
+		return
+	}
+
+	unknown, err = ole.GetActiveObject(classID, ole.IID_IUnknown)
+	if err != nil {
+		return
+	}
+
+	return
+}
+
+// CallMethod calls method on IDispatch with parameters.
+func CallMethod(disp *ole.IDispatch, name string, params ...interface{}) (result *ole.VARIANT, err error) {
+	return disp.InvokeWithOptionalArgs(name, ole.DISPATCH_METHOD, params)
+}
+
+// MustCallMethod calls method on IDispatch with parameters or panics.
+func MustCallMethod(disp *ole.IDispatch, name string, params ...interface{}) (result *ole.VARIANT) {
+	r, err := CallMethod(disp, name, params...)
+	if err != nil {
+		panic(err.Error())
+	}
+	return r
+}
+
+// GetProperty retrieves property from IDispatch.
+func GetProperty(disp *ole.IDispatch, name string, params ...interface{}) (result *ole.VARIANT, err error) {
+	return disp.InvokeWithOptionalArgs(name, ole.DISPATCH_PROPERTYGET, params)
+}
+
+// MustGetProperty retrieves property from IDispatch or panics.
+func MustGetProperty(disp *ole.IDispatch, name string, params ...interface{}) (result *ole.VARIANT) {
+	r, err := GetProperty(disp, name, params...)
+	if err != nil {
+		panic(err.Error())
+	}
+	return r
+}
+
+// PutProperty mutates property.
+func PutProperty(disp *ole.IDispatch, name string, params ...interface{}) (result *ole.VARIANT, err error) {
+	return disp.InvokeWithOptionalArgs(name, ole.DISPATCH_PROPERTYPUT, params)
+}
+
+// MustPutProperty mutates property or panics.
+func MustPutProperty(disp *ole.IDispatch, name string, params ...interface{}) (result *ole.VARIANT) {
+	r, err := PutProperty(disp, name, params...)
+	if err != nil {
+		panic(err.Error())
+	}
+	return r
+}
+
+// PutPropertyRef mutates property reference.
+func PutPropertyRef(disp *ole.IDispatch, name string, params ...interface{}) (result *ole.VARIANT, err error) {
+	return disp.InvokeWithOptionalArgs(name, ole.DISPATCH_PROPERTYPUTREF, params)
+}
+
+// MustPutPropertyRef mutates property reference or panics.
+func MustPutPropertyRef(disp *ole.IDispatch, name string, params ...interface{}) (result *ole.VARIANT) {
+	r, err := PutPropertyRef(disp, name, params...)
+	if err != nil {
+		panic(err.Error())
+	}
+	return r
+}
+
+func ForEach(disp *ole.IDispatch, f func(v *ole.VARIANT) error) error {
+	newEnum, err := disp.GetProperty("_NewEnum")
+	if err != nil {
+		return err
+	}
+	defer newEnum.Clear()
+
+	enum, err := newEnum.ToIUnknown().IEnumVARIANT(ole.IID_IEnumVariant)
+	if err != nil {
+		return err
+	}
+	defer enum.Release()
+
+	for item, length, err := enum.Next(1); length > 0; item, length, err = enum.Next(1) {
+		if err != nil {
+			return err
+		}
+		if ferr := f(&item); ferr != nil {
+			return ferr
+		}
+	}
+	return nil
+}

vendor/github.com/go-ole/go-ole/safearray.go

@@ -0,0 +1,27 @@
+// Package is meant to retrieve and process safe array data returned from COM.
+
+package ole
+
+// SafeArrayBound defines the SafeArray boundaries.
+type SafeArrayBound struct {
+	Elements   uint32
+	LowerBound int32
+}
+
+// SafeArray is how COM handles arrays.
+type SafeArray struct {
+	Dimensions   uint16
+	FeaturesFlag uint16
+	ElementsSize uint32
+	LocksAmount  uint32
+	Data         uint32
+	Bounds       [16]byte
+}
+
+// SAFEARRAY is obsolete, exists for backwards compatibility.
+// Use SafeArray
+type SAFEARRAY SafeArray
+
+// SAFEARRAYBOUND is obsolete, exists for backwards compatibility.
+// Use SafeArrayBound
+type SAFEARRAYBOUND SafeArrayBound

vendor/github.com/go-ole/go-ole/safearray_func.go

@@ -0,0 +1,211 @@
+// +build !windows
+
+package ole
+
+import (
+	"unsafe"
+)
+
+// safeArrayAccessData returns raw array pointer.
+//
+// AKA: SafeArrayAccessData in Windows API.
+func safeArrayAccessData(safearray *SafeArray) (uintptr, error) {
+	return uintptr(0), NewError(E_NOTIMPL)
+}
+
+// safeArrayUnaccessData releases raw array.
+//
+// AKA: SafeArrayUnaccessData in Windows API.
+func safeArrayUnaccessData(safearray *SafeArray) error {
+	return NewError(E_NOTIMPL)
+}
+
+// safeArrayAllocData allocates SafeArray.
+//
+// AKA: SafeArrayAllocData in Windows API.
+func safeArrayAllocData(safearray *SafeArray) error {
+	return NewError(E_NOTIMPL)
+}
+
+// safeArrayAllocDescriptor allocates SafeArray.
+//
+// AKA: SafeArrayAllocDescriptor in Windows API.
+func safeArrayAllocDescriptor(dimensions uint32) (*SafeArray, error) {
+	return nil, NewError(E_NOTIMPL)
+}
+
+// safeArrayAllocDescriptorEx allocates SafeArray.
+//
+// AKA: SafeArrayAllocDescriptorEx in Windows API.
+func safeArrayAllocDescriptorEx(variantType VT, dimensions uint32) (*SafeArray, error) {
+	return nil, NewError(E_NOTIMPL)
+}
+
+// safeArrayCopy returns copy of SafeArray.
+//
+// AKA: SafeArrayCopy in Windows API.
+func safeArrayCopy(original *SafeArray) (*SafeArray, error) {
+	return nil, NewError(E_NOTIMPL)
+}
+
+// safeArrayCopyData duplicates SafeArray into another SafeArray object.
+//
+// AKA: SafeArrayCopyData in Windows API.
+func safeArrayCopyData(original *SafeArray, duplicate *SafeArray) error {
+	return NewError(E_NOTIMPL)
+}
+
+// safeArrayCreate creates SafeArray.
+//
+// AKA: SafeArrayCreate in Windows API.
+func safeArrayCreate(variantType VT, dimensions uint32, bounds *SafeArrayBound) (*SafeArray, error) {
+	return nil, NewError(E_NOTIMPL)
+}
+
+// safeArrayCreateEx creates SafeArray.
+//
+// AKA: SafeArrayCreateEx in Windows API.
+func safeArrayCreateEx(variantType VT, dimensions uint32, bounds *SafeArrayBound, extra uintptr) (*SafeArray, error) {
+	return nil, NewError(E_NOTIMPL)
+}
+
+// safeArrayCreateVector creates SafeArray.
+//
+// AKA: SafeArrayCreateVector in Windows API.
+func safeArrayCreateVector(variantType VT, lowerBound int32, length uint32) (*SafeArray, error) {
+	return nil, NewError(E_NOTIMPL)
+}
+
+// safeArrayCreateVectorEx creates SafeArray.
+//
+// AKA: SafeArrayCreateVectorEx in Windows API.
+func safeArrayCreateVectorEx(variantType VT, lowerBound int32, length uint32, extra uintptr) (*SafeArray, error) {
+	return nil, NewError(E_NOTIMPL)
+}
+
+// safeArrayDestroy destroys SafeArray object.
+//
+// AKA: SafeArrayDestroy in Windows API.
+func safeArrayDestroy(safearray *SafeArray) error {
+	return NewError(E_NOTIMPL)
+}
+
+// safeArrayDestroyData destroys SafeArray object.
+//
+// AKA: SafeArrayDestroyData in Windows API.
+func safeArrayDestroyData(safearray *SafeArray) error {
+	return NewError(E_NOTIMPL)
+}
+
+// safeArrayDestroyDescriptor destroys SafeArray object.
+//
+// AKA: SafeArrayDestroyDescriptor in Windows API.
+func safeArrayDestroyDescriptor(safearray *SafeArray) error {
+	return NewError(E_NOTIMPL)
+}
+
+// safeArrayGetDim is the amount of dimensions in the SafeArray.
+//
+// SafeArrays may have multiple dimensions. Meaning, it could be
+// multidimensional array.
+//
+// AKA: SafeArrayGetDim in Windows API.
+func safeArrayGetDim(safearray *SafeArray) (*uint32, error) {
+	u := uint32(0)
+	return &u, NewError(E_NOTIMPL)
+}
+
+// safeArrayGetElementSize is the element size in bytes.
+//
+// AKA: SafeArrayGetElemsize in Windows API.
+func safeArrayGetElementSize(safearray *SafeArray) (*uint32, error) {
+	u := uint32(0)
+	return &u, NewError(E_NOTIMPL)
+}
+
+// safeArrayGetElement retrieves element at given index.
+func safeArrayGetElement(safearray *SafeArray, index int32, pv unsafe.Pointer) error {
+	return NewError(E_NOTIMPL)
+}
+
+// safeArrayGetElement retrieves element at given index and converts to string.
+func safeArrayGetElementString(safearray *SafeArray, index int32) (string, error) {
+	return "", NewError(E_NOTIMPL)
+}
+
+// safeArrayGetIID is the InterfaceID of the elements in the SafeArray.
+//
+// AKA: SafeArrayGetIID in Windows API.
+func safeArrayGetIID(safearray *SafeArray) (*GUID, error) {
+	return nil, NewError(E_NOTIMPL)
+}
+
+// safeArrayGetLBound returns lower bounds of SafeArray.
+//
+// SafeArrays may have multiple dimensions. Meaning, it could be
+// multidimensional array.
+//
+// AKA: SafeArrayGetLBound in Windows API.
+func safeArrayGetLBound(safearray *SafeArray, dimension uint32) (int32, error) {
+	return int32(0), NewError(E_NOTIMPL)
+}
+
+// safeArrayGetUBound returns upper bounds of SafeArray.
+//
+// SafeArrays may have multiple dimensions. Meaning, it could be
+// multidimensional array.
+//
+// AKA: SafeArrayGetUBound in Windows API.
+func safeArrayGetUBound(safearray *SafeArray, dimension uint32) (int32, error) {
+	return int32(0), NewError(E_NOTIMPL)
+}
+
+// safeArrayGetVartype returns data type of SafeArray.
+//
+// AKA: SafeArrayGetVartype in Windows API.
+func safeArrayGetVartype(safearray *SafeArray) (uint16, error) {
+	return uint16(0), NewError(E_NOTIMPL)
+}
+
+// safeArrayLock locks SafeArray for reading to modify SafeArray.
+//
+// This must be called during some calls to ensure that another process does not
+// read or write to the SafeArray during editing.
+//
+// AKA: SafeArrayLock in Windows API.
+func safeArrayLock(safearray *SafeArray) error {
+	return NewError(E_NOTIMPL)
+}
+
+// safeArrayUnlock unlocks SafeArray for reading.
+//
+// AKA: SafeArrayUnlock in Windows API.
+func safeArrayUnlock(safearray *SafeArray) error {
+	return NewError(E_NOTIMPL)
+}
+
+// safeArrayPutElement stores the data element at the specified location in the
+// array.
+//
+// AKA: SafeArrayPutElement in Windows API.
+func safeArrayPutElement(safearray *SafeArray, index int64, element uintptr) error {
+	return NewError(E_NOTIMPL)
+}
+
+// safeArrayGetRecordInfo accesses IRecordInfo info for custom types.
+//
+// AKA: SafeArrayGetRecordInfo in Windows API.
+//
+// XXX: Must implement IRecordInfo interface for this to return.
+func safeArrayGetRecordInfo(safearray *SafeArray) (interface{}, error) {
+	return nil, NewError(E_NOTIMPL)
+}
+
+// safeArraySetRecordInfo mutates IRecordInfo info for custom types.
+//
+// AKA: SafeArraySetRecordInfo in Windows API.
+//
+// XXX: Must implement IRecordInfo interface for this to return.
+func safeArraySetRecordInfo(safearray *SafeArray, recordInfo interface{}) error {
+	return NewError(E_NOTIMPL)
+}

vendor/github.com/go-ole/go-ole/safearray_windows.go

@@ -0,0 +1,337 @@
+// +build windows
+
+package ole
+
+import (
+	"unsafe"
+)
+
+var (
+	procSafeArrayAccessData        = modoleaut32.NewProc("SafeArrayAccessData")
+	procSafeArrayAllocData         = modoleaut32.NewProc("SafeArrayAllocData")
+	procSafeArrayAllocDescriptor   = modoleaut32.NewProc("SafeArrayAllocDescriptor")
+	procSafeArrayAllocDescriptorEx = modoleaut32.NewProc("SafeArrayAllocDescriptorEx")
+	procSafeArrayCopy              = modoleaut32.NewProc("SafeArrayCopy")
+	procSafeArrayCopyData          = modoleaut32.NewProc("SafeArrayCopyData")
+	procSafeArrayCreate            = modoleaut32.NewProc("SafeArrayCreate")
+	procSafeArrayCreateEx          = modoleaut32.NewProc("SafeArrayCreateEx")
+	procSafeArrayCreateVector      = modoleaut32.NewProc("SafeArrayCreateVector")
+	procSafeArrayCreateVectorEx    = modoleaut32.NewProc("SafeArrayCreateVectorEx")
+	procSafeArrayDestroy           = modoleaut32.NewProc("SafeArrayDestroy")
+	procSafeArrayDestroyData       = modoleaut32.NewProc("SafeArrayDestroyData")
+	procSafeArrayDestroyDescriptor = modoleaut32.NewProc("SafeArrayDestroyDescriptor")
+	procSafeArrayGetDim            = modoleaut32.NewProc("SafeArrayGetDim")
+	procSafeArrayGetElement        = modoleaut32.NewProc("SafeArrayGetElement")
+	procSafeArrayGetElemsize       = modoleaut32.NewProc("SafeArrayGetElemsize")
+	procSafeArrayGetIID            = modoleaut32.NewProc("SafeArrayGetIID")
+	procSafeArrayGetLBound         = modoleaut32.NewProc("SafeArrayGetLBound")
+	procSafeArrayGetUBound         = modoleaut32.NewProc("SafeArrayGetUBound")
+	procSafeArrayGetVartype        = modoleaut32.NewProc("SafeArrayGetVartype")
+	procSafeArrayLock              = modoleaut32.NewProc("SafeArrayLock")
+	procSafeArrayPtrOfIndex        = modoleaut32.NewProc("SafeArrayPtrOfIndex")
+	procSafeArrayUnaccessData      = modoleaut32.NewProc("SafeArrayUnaccessData")
+	procSafeArrayUnlock            = modoleaut32.NewProc("SafeArrayUnlock")
+	procSafeArrayPutElement        = modoleaut32.NewProc("SafeArrayPutElement")
+	//procSafeArrayRedim             = modoleaut32.NewProc("SafeArrayRedim") // TODO
+	//procSafeArraySetIID            = modoleaut32.NewProc("SafeArraySetIID") // TODO
+	procSafeArrayGetRecordInfo = modoleaut32.NewProc("SafeArrayGetRecordInfo")
+	procSafeArraySetRecordInfo = modoleaut32.NewProc("SafeArraySetRecordInfo")
+)
+
+// safeArrayAccessData returns raw array pointer.
+//
+// AKA: SafeArrayAccessData in Windows API.
+// Todo: Test
+func safeArrayAccessData(safearray *SafeArray) (element uintptr, err error) {
+	err = convertHresultToError(
+		procSafeArrayAccessData.Call(
+			uintptr(unsafe.Pointer(safearray)),
+			uintptr(unsafe.Pointer(&element))))
+	return
+}
+
+// safeArrayUnaccessData releases raw array.
+//
+// AKA: SafeArrayUnaccessData in Windows API.
+func safeArrayUnaccessData(safearray *SafeArray) (err error) {
+	err = convertHresultToError(procSafeArrayUnaccessData.Call(uintptr(unsafe.Pointer(safearray))))
+	return
+}
+
+// safeArrayAllocData allocates SafeArray.
+//
+// AKA: SafeArrayAllocData in Windows API.
+func safeArrayAllocData(safearray *SafeArray) (err error) {
+	err = convertHresultToError(procSafeArrayAllocData.Call(uintptr(unsafe.Pointer(safearray))))
+	return
+}
+
+// safeArrayAllocDescriptor allocates SafeArray.
+//
+// AKA: SafeArrayAllocDescriptor in Windows API.
+func safeArrayAllocDescriptor(dimensions uint32) (safearray *SafeArray, err error) {
+	err = convertHresultToError(
+		procSafeArrayAllocDescriptor.Call(uintptr(dimensions), uintptr(unsafe.Pointer(&safearray))))
+	return
+}
+
+// safeArrayAllocDescriptorEx allocates SafeArray.
+//
+// AKA: SafeArrayAllocDescriptorEx in Windows API.
+func safeArrayAllocDescriptorEx(variantType VT, dimensions uint32) (safearray *SafeArray, err error) {
+	err = convertHresultToError(
+		procSafeArrayAllocDescriptorEx.Call(
+			uintptr(variantType),
+			uintptr(dimensions),
+			uintptr(unsafe.Pointer(&safearray))))
+	return
+}
+
+// safeArrayCopy returns copy of SafeArray.
+//
+// AKA: SafeArrayCopy in Windows API.
+func safeArrayCopy(original *SafeArray) (safearray *SafeArray, err error) {
+	err = convertHresultToError(
+		procSafeArrayCopy.Call(
+			uintptr(unsafe.Pointer(original)),
+			uintptr(unsafe.Pointer(&safearray))))
+	return
+}
+
+// safeArrayCopyData duplicates SafeArray into another SafeArray object.
+//
+// AKA: SafeArrayCopyData in Windows API.
+func safeArrayCopyData(original *SafeArray, duplicate *SafeArray) (err error) {
+	err = convertHresultToError(
+		procSafeArrayCopyData.Call(
+			uintptr(unsafe.Pointer(original)),
+			uintptr(unsafe.Pointer(duplicate))))
+	return
+}
+
+// safeArrayCreate creates SafeArray.
+//
+// AKA: SafeArrayCreate in Windows API.
+func safeArrayCreate(variantType VT, dimensions uint32, bounds *SafeArrayBound) (safearray *SafeArray, err error) {
+	sa, _, err := procSafeArrayCreate.Call(
+		uintptr(variantType),
+		uintptr(dimensions),
+		uintptr(unsafe.Pointer(bounds)))
+	safearray = (*SafeArray)(unsafe.Pointer(&sa))
+	return
+}
+
+// safeArrayCreateEx creates SafeArray.
+//
+// AKA: SafeArrayCreateEx in Windows API.
+func safeArrayCreateEx(variantType VT, dimensions uint32, bounds *SafeArrayBound, extra uintptr) (safearray *SafeArray, err error) {
+	sa, _, err := procSafeArrayCreateEx.Call(
+		uintptr(variantType),
+		uintptr(dimensions),
+		uintptr(unsafe.Pointer(bounds)),
+		extra)
+	safearray = (*SafeArray)(unsafe.Pointer(sa))
+	return
+}
+
+// safeArrayCreateVector creates SafeArray.
+//
+// AKA: SafeArrayCreateVector in Windows API.
+func safeArrayCreateVector(variantType VT, lowerBound int32, length uint32) (safearray *SafeArray, err error) {
+	sa, _, err := procSafeArrayCreateVector.Call(
+		uintptr(variantType),
+		uintptr(lowerBound),
+		uintptr(length))
+	safearray = (*SafeArray)(unsafe.Pointer(sa))
+	return
+}
+
+// safeArrayCreateVectorEx creates SafeArray.
+//
+// AKA: SafeArrayCreateVectorEx in Windows API.
+func safeArrayCreateVectorEx(variantType VT, lowerBound int32, length uint32, extra uintptr) (safearray *SafeArray, err error) {
+	sa, _, err := procSafeArrayCreateVectorEx.Call(
+		uintptr(variantType),
+		uintptr(lowerBound),
+		uintptr(length),
+		extra)
+	safearray = (*SafeArray)(unsafe.Pointer(sa))
+	return
+}
+
+// safeArrayDestroy destroys SafeArray object.
+//
+// AKA: SafeArrayDestroy in Windows API.
+func safeArrayDestroy(safearray *SafeArray) (err error) {
+	err = convertHresultToError(procSafeArrayDestroy.Call(uintptr(unsafe.Pointer(safearray))))
+	return
+}
+
+// safeArrayDestroyData destroys SafeArray object.
+//
+// AKA: SafeArrayDestroyData in Windows API.
+func safeArrayDestroyData(safearray *SafeArray) (err error) {
+	err = convertHresultToError(procSafeArrayDestroyData.Call(uintptr(unsafe.Pointer(safearray))))
+	return
+}
+
+// safeArrayDestroyDescriptor destroys SafeArray object.
+//
+// AKA: SafeArrayDestroyDescriptor in Windows API.
+func safeArrayDestroyDescriptor(safearray *SafeArray) (err error) {
+	err = convertHresultToError(procSafeArrayDestroyDescriptor.Call(uintptr(unsafe.Pointer(safearray))))
+	return
+}
+
+// safeArrayGetDim is the amount of dimensions in the SafeArray.
+//
+// SafeArrays may have multiple dimensions. Meaning, it could be
+// multidimensional array.
+//
+// AKA: SafeArrayGetDim in Windows API.
+func safeArrayGetDim(safearray *SafeArray) (dimensions *uint32, err error) {
+	l, _, err := procSafeArrayGetDim.Call(uintptr(unsafe.Pointer(safearray)))
+	dimensions = (*uint32)(unsafe.Pointer(l))
+	return
+}
+
+// safeArrayGetElementSize is the element size in bytes.
+//
+// AKA: SafeArrayGetElemsize in Windows API.
+func safeArrayGetElementSize(safearray *SafeArray) (length *uint32, err error) {
+	l, _, err := procSafeArrayGetElemsize.Call(uintptr(unsafe.Pointer(safearray)))
+	length = (*uint32)(unsafe.Pointer(l))
+	return
+}
+
+// safeArrayGetElement retrieves element at given index.
+func safeArrayGetElement(safearray *SafeArray, index int32, pv unsafe.Pointer) error {
+	return convertHresultToError(
+		procSafeArrayGetElement.Call(
+			uintptr(unsafe.Pointer(safearray)),
+			uintptr(unsafe.Pointer(&index)),
+			uintptr(pv)))
+}
+
+// safeArrayGetElementString retrieves element at given index and converts to string.
+func safeArrayGetElementString(safearray *SafeArray, index int32) (str string, err error) {
+	var element *int16
+	err = convertHresultToError(
+		procSafeArrayGetElement.Call(
+			uintptr(unsafe.Pointer(safearray)),
+			uintptr(unsafe.Pointer(&index)),
+			uintptr(unsafe.Pointer(&element))))
+	str = BstrToString(*(**uint16)(unsafe.Pointer(&element)))
+	SysFreeString(element)
+	return
+}
+
+// safeArrayGetIID is the InterfaceID of the elements in the SafeArray.
+//
+// AKA: SafeArrayGetIID in Windows API.
+func safeArrayGetIID(safearray *SafeArray) (guid *GUID, err error) {
+	err = convertHresultToError(
+		procSafeArrayGetIID.Call(
+			uintptr(unsafe.Pointer(safearray)),
+			uintptr(unsafe.Pointer(&guid))))
+	return
+}
+
+// safeArrayGetLBound returns lower bounds of SafeArray.
+//
+// SafeArrays may have multiple dimensions. Meaning, it could be
+// multidimensional array.
+//
+// AKA: SafeArrayGetLBound in Windows API.
+func safeArrayGetLBound(safearray *SafeArray, dimension uint32) (lowerBound int32, err error) {
+	err = convertHresultToError(
+		procSafeArrayGetLBound.Call(
+			uintptr(unsafe.Pointer(safearray)),
+			uintptr(dimension),
+			uintptr(unsafe.Pointer(&lowerBound))))
+	return
+}
+
+// safeArrayGetUBound returns upper bounds of SafeArray.
+//
+// SafeArrays may have multiple dimensions. Meaning, it could be
+// multidimensional array.
+//
+// AKA: SafeArrayGetUBound in Windows API.
+func safeArrayGetUBound(safearray *SafeArray, dimension uint32) (upperBound int32, err error) {
+	err = convertHresultToError(
+		procSafeArrayGetUBound.Call(
+			uintptr(unsafe.Pointer(safearray)),
+			uintptr(dimension),
+			uintptr(unsafe.Pointer(&upperBound))))
+	return
+}
+
+// safeArrayGetVartype returns data type of SafeArray.
+//
+// AKA: SafeArrayGetVartype in Windows API.
+func safeArrayGetVartype(safearray *SafeArray) (varType uint16, err error) {
+	err = convertHresultToError(
+		procSafeArrayGetVartype.Call(
+			uintptr(unsafe.Pointer(safearray)),
+			uintptr(unsafe.Pointer(&varType))))
+	return
+}
+
+// safeArrayLock locks SafeArray for reading to modify SafeArray.
+//
+// This must be called during some calls to ensure that another process does not
+// read or write to the SafeArray during editing.
+//
+// AKA: SafeArrayLock in Windows API.
+func safeArrayLock(safearray *SafeArray) (err error) {
+	err = convertHresultToError(procSafeArrayLock.Call(uintptr(unsafe.Pointer(safearray))))
+	return
+}
+
+// safeArrayUnlock unlocks SafeArray for reading.
+//
+// AKA: SafeArrayUnlock in Windows API.
+func safeArrayUnlock(safearray *SafeArray) (err error) {
+	err = convertHresultToError(procSafeArrayUnlock.Call(uintptr(unsafe.Pointer(safearray))))
+	return
+}
+
+// safeArrayPutElement stores the data element at the specified location in the
+// array.
+//
+// AKA: SafeArrayPutElement in Windows API.
+func safeArrayPutElement(safearray *SafeArray, index int64, element uintptr) (err error) {
+	err = convertHresultToError(
+		procSafeArrayPutElement.Call(
+			uintptr(unsafe.Pointer(safearray)),
+			uintptr(unsafe.Pointer(&index)),
+			uintptr(unsafe.Pointer(element))))
+	return
+}
+
+// safeArrayGetRecordInfo accesses IRecordInfo info for custom types.
+//
+// AKA: SafeArrayGetRecordInfo in Windows API.
+//
+// XXX: Must implement IRecordInfo interface for this to return.
+func safeArrayGetRecordInfo(safearray *SafeArray) (recordInfo interface{}, err error) {
+	err = convertHresultToError(
+		procSafeArrayGetRecordInfo.Call(
+			uintptr(unsafe.Pointer(safearray)),
+			uintptr(unsafe.Pointer(&recordInfo))))
+	return
+}
+
+// safeArraySetRecordInfo mutates IRecordInfo info for custom types.
+//
+// AKA: SafeArraySetRecordInfo in Windows API.
+//
+// XXX: Must implement IRecordInfo interface for this to return.
+func safeArraySetRecordInfo(safearray *SafeArray, recordInfo interface{}) (err error) {
+	err = convertHresultToError(
+		procSafeArraySetRecordInfo.Call(
+			uintptr(unsafe.Pointer(safearray)),
+			uintptr(unsafe.Pointer(&recordInfo))))
+	return
+}

vendor/github.com/go-ole/go-ole/safearrayconversion.go

@@ -0,0 +1,140 @@
+// Helper for converting SafeArray to array of objects.
+
+package ole
+
+import (
+	"unsafe"
+)
+
+type SafeArrayConversion struct {
+	Array *SafeArray
+}
+
+func (sac *SafeArrayConversion) ToStringArray() (strings []string) {
+	totalElements, _ := sac.TotalElements(0)
+	strings = make([]string, totalElements)
+
+	for i := int32(0); i < totalElements; i++ {
+		strings[int32(i)], _ = safeArrayGetElementString(sac.Array, i)
+	}
+
+	return
+}
+
+func (sac *SafeArrayConversion) ToByteArray() (bytes []byte) {
+	totalElements, _ := sac.TotalElements(0)
+	bytes = make([]byte, totalElements)
+
+	for i := int32(0); i < totalElements; i++ {
+		safeArrayGetElement(sac.Array, i, unsafe.Pointer(&bytes[int32(i)]))
+	}
+
+	return
+}
+
+func (sac *SafeArrayConversion) ToValueArray() (values []interface{}) {
+	totalElements, _ := sac.TotalElements(0)
+	values = make([]interface{}, totalElements)
+	vt, _ := safeArrayGetVartype(sac.Array)
+
+	for i := int32(0); i < totalElements; i++ {
+		switch VT(vt) {
+		case VT_BOOL:
+			var v bool
+			safeArrayGetElement(sac.Array, i, unsafe.Pointer(&v))
+			values[i] = v
+		case VT_I1:
+			var v int8
+			safeArrayGetElement(sac.Array, i, unsafe.Pointer(&v))
+			values[i] = v
+		case VT_I2:
+			var v int16
+			safeArrayGetElement(sac.Array, i, unsafe.Pointer(&v))
+			values[i] = v
+		case VT_I4:
+			var v int32
+			safeArrayGetElement(sac.Array, i, unsafe.Pointer(&v))
+			values[i] = v
+		case VT_I8:
+			var v int64
+			safeArrayGetElement(sac.Array, i, unsafe.Pointer(&v))
+			values[i] = v
+		case VT_UI1:
+			var v uint8
+			safeArrayGetElement(sac.Array, i, unsafe.Pointer(&v))
+			values[i] = v
+		case VT_UI2:
+			var v uint16
+			safeArrayGetElement(sac.Array, i, unsafe.Pointer(&v))
+			values[i] = v
+		case VT_UI4:
+			var v uint32
+			safeArrayGetElement(sac.Array, i, unsafe.Pointer(&v))
+			values[i] = v
+		case VT_UI8:
+			var v uint64
+			safeArrayGetElement(sac.Array, i, unsafe.Pointer(&v))
+			values[i] = v
+		case VT_R4:
+			var v float32
+			safeArrayGetElement(sac.Array, i, unsafe.Pointer(&v))
+			values[i] = v
+		case VT_R8:
+			var v float64
+			safeArrayGetElement(sac.Array, i, unsafe.Pointer(&v))
+			values[i] = v
+		case VT_BSTR:
+			var v string
+			safeArrayGetElement(sac.Array, i, unsafe.Pointer(&v))
+			values[i] = v
+		case VT_VARIANT:
+			var v VARIANT
+			safeArrayGetElement(sac.Array, i, unsafe.Pointer(&v))
+			values[i] = v.Value()
+		default:
+			// TODO
+		}
+	}
+
+	return
+}
+
+func (sac *SafeArrayConversion) GetType() (varType uint16, err error) {
+	return safeArrayGetVartype(sac.Array)
+}
+
+func (sac *SafeArrayConversion) GetDimensions() (dimensions *uint32, err error) {
+	return safeArrayGetDim(sac.Array)
+}
+
+func (sac *SafeArrayConversion) GetSize() (length *uint32, err error) {
+	return safeArrayGetElementSize(sac.Array)
+}
+
+func (sac *SafeArrayConversion) TotalElements(index uint32) (totalElements int32, err error) {
+	if index < 1 {
+		index = 1
+	}
+
+	// Get array bounds
+	var LowerBounds int32
+	var UpperBounds int32
+
+	LowerBounds, err = safeArrayGetLBound(sac.Array, index)
+	if err != nil {
+		return
+	}
+
+	UpperBounds, err = safeArrayGetUBound(sac.Array, index)
+	if err != nil {
+		return
+	}
+
+	totalElements = UpperBounds - LowerBounds + 1
+	return
+}
+
+// Release Safe Array memory
+func (sac *SafeArrayConversion) Release() {
+	safeArrayDestroy(sac.Array)
+}

vendor/github.com/go-ole/go-ole/safearrayslices.go

@@ -0,0 +1,33 @@
+// +build windows
+
+package ole
+
+import (
+	"unsafe"
+)
+
+func safeArrayFromByteSlice(slice []byte) *SafeArray {
+	array, _ := safeArrayCreateVector(VT_UI1, 0, uint32(len(slice)))
+
+	if array == nil {
+		panic("Could not convert []byte to SAFEARRAY")
+	}
+
+	for i, v := range slice {
+		safeArrayPutElement(array, int64(i), uintptr(unsafe.Pointer(&v)))
+	}
+	return array
+}
+
+func safeArrayFromStringSlice(slice []string) *SafeArray {
+	array, _ := safeArrayCreateVector(VT_BSTR, 0, uint32(len(slice)))
+
+	if array == nil {
+		panic("Could not convert []string to SAFEARRAY")
+	}
+	// SysAllocStringLen(s)
+	for i, v := range slice {
+		safeArrayPutElement(array, int64(i), uintptr(unsafe.Pointer(SysAllocStringLen(v))))
+	}
+	return array
+}

vendor/github.com/go-ole/go-ole/utility.go

@@ -0,0 +1,101 @@
+package ole
+
+import (
+	"unicode/utf16"
+	"unsafe"
+)
+
+// ClassIDFrom retrieves class ID whether given is program ID or application string.
+//
+// Helper that provides check against both Class ID from Program ID and Class ID from string. It is
+// faster, if you know which you are using, to use the individual functions, but this will check
+// against available functions for you.
+func ClassIDFrom(programID string) (classID *GUID, err error) {
+	classID, err = CLSIDFromProgID(programID)
+	if err != nil {
+		classID, err = CLSIDFromString(programID)
+		if err != nil {
+			return
+		}
+	}
+	return
+}
+
+// BytePtrToString converts byte pointer to a Go string.
+func BytePtrToString(p *byte) string {
+	a := (*[10000]uint8)(unsafe.Pointer(p))
+	i := 0
+	for a[i] != 0 {
+		i++
+	}
+	return string(a[:i])
+}
+
+// UTF16PtrToString is alias for LpOleStrToString.
+//
+// Kept for compatibility reasons.
+func UTF16PtrToString(p *uint16) string {
+	return LpOleStrToString(p)
+}
+
+// LpOleStrToString converts COM Unicode to Go string.
+func LpOleStrToString(p *uint16) string {
+	if p == nil {
+		return ""
+	}
+
+	length := lpOleStrLen(p)
+	a := make([]uint16, length)
+
+	ptr := unsafe.Pointer(p)
+
+	for i := 0; i < int(length); i++ {
+		a[i] = *(*uint16)(ptr)
+		ptr = unsafe.Pointer(uintptr(ptr) + 2)
+	}
+
+	return string(utf16.Decode(a))
+}
+
+// BstrToString converts COM binary string to Go string.
+func BstrToString(p *uint16) string {
+	if p == nil {
+		return ""
+	}
+	length := SysStringLen((*int16)(unsafe.Pointer(p)))
+	a := make([]uint16, length)
+
+	ptr := unsafe.Pointer(p)
+
+	for i := 0; i < int(length); i++ {
+		a[i] = *(*uint16)(ptr)
+		ptr = unsafe.Pointer(uintptr(ptr) + 2)
+	}
+	return string(utf16.Decode(a))
+}
+
+// lpOleStrLen returns the length of Unicode string.
+func lpOleStrLen(p *uint16) (length int64) {
+	if p == nil {
+		return 0
+	}
+
+	ptr := unsafe.Pointer(p)
+
+	for i := 0; ; i++ {
+		if 0 == *(*uint16)(ptr) {
+			length = int64(i)
+			break
+		}
+		ptr = unsafe.Pointer(uintptr(ptr) + 2)
+	}
+	return
+}
+
+// convertHresultToError converts syscall to error, if call is unsuccessful.
+func convertHresultToError(hr uintptr, r2 uintptr, ignore error) (err error) {
+	if hr != 0 {
+		err = NewError(hr)
+	}
+	return
+}

vendor/github.com/go-ole/go-ole/variables.go

@@ -0,0 +1,15 @@
+// +build windows
+
+package ole
+
+import (
+	"golang.org/x/sys/windows"
+)
+
+var (
+	modcombase  = windows.NewLazySystemDLL("combase.dll")
+	modkernel32 = windows.NewLazySystemDLL("kernel32.dll")
+	modole32    = windows.NewLazySystemDLL("ole32.dll")
+	modoleaut32 = windows.NewLazySystemDLL("oleaut32.dll")
+	moduser32   = windows.NewLazySystemDLL("user32.dll")
+)

vendor/github.com/go-ole/go-ole/variant.go

@@ -0,0 +1,105 @@
+package ole
+
+import "unsafe"
+
+// NewVariant returns new variant based on type and value.
+func NewVariant(vt VT, val int64) VARIANT {
+	return VARIANT{VT: vt, Val: val}
+}
+
+// ToIUnknown converts Variant to Unknown object.
+func (v *VARIANT) ToIUnknown() *IUnknown {
+	if v.VT != VT_UNKNOWN {
+		return nil
+	}
+	return (*IUnknown)(unsafe.Pointer(uintptr(v.Val)))
+}
+
+// ToIDispatch converts variant to dispatch object.
+func (v *VARIANT) ToIDispatch() *IDispatch {
+	if v.VT != VT_DISPATCH {
+		return nil
+	}
+	return (*IDispatch)(unsafe.Pointer(uintptr(v.Val)))
+}
+
+// ToArray converts variant to SafeArray helper.
+func (v *VARIANT) ToArray() *SafeArrayConversion {
+	if v.VT != VT_SAFEARRAY {
+		if v.VT&VT_ARRAY == 0 {
+			return nil
+		}
+	}
+	var safeArray *SafeArray = (*SafeArray)(unsafe.Pointer(uintptr(v.Val)))
+	return &SafeArrayConversion{safeArray}
+}
+
+// ToString converts variant to Go string.
+func (v *VARIANT) ToString() string {
+	if v.VT != VT_BSTR {
+		return ""
+	}
+	return BstrToString(*(**uint16)(unsafe.Pointer(&v.Val)))
+}
+
+// Clear the memory of variant object.
+func (v *VARIANT) Clear() error {
+	return VariantClear(v)
+}
+
+// Value returns variant value based on its type.
+//
+// Currently supported types: 2- and 4-byte integers, strings, bools.
+// Note that 64-bit integers, datetimes, and other types are stored as strings
+// and will be returned as strings.
+//
+// Needs to be further converted, because this returns an interface{}.
+func (v *VARIANT) Value() interface{} {
+	switch v.VT {
+	case VT_I1:
+		return int8(v.Val)
+	case VT_UI1:
+		return uint8(v.Val)
+	case VT_I2:
+		return int16(v.Val)
+	case VT_UI2:
+		return uint16(v.Val)
+	case VT_I4:
+		return int32(v.Val)
+	case VT_UI4:
+		return uint32(v.Val)
+	case VT_I8:
+		return int64(v.Val)
+	case VT_UI8:
+		return uint64(v.Val)
+	case VT_INT:
+		return int(v.Val)
+	case VT_UINT:
+		return uint(v.Val)
+	case VT_INT_PTR:
+		return uintptr(v.Val) // TODO
+	case VT_UINT_PTR:
+		return uintptr(v.Val)
+	case VT_R4:
+		return *(*float32)(unsafe.Pointer(&v.Val))
+	case VT_R8:
+		return *(*float64)(unsafe.Pointer(&v.Val))
+	case VT_BSTR:
+		return v.ToString()
+	case VT_DATE:
+		// VT_DATE type will either return float64 or time.Time.
+		d := uint64(v.Val)
+		date, err := GetVariantDate(d)
+		if err != nil {
+			return float64(v.Val)
+		}
+		return date
+	case VT_UNKNOWN:
+		return v.ToIUnknown()
+	case VT_DISPATCH:
+		return v.ToIDispatch()
+	case VT_BOOL:
+		return v.Val != 0
+	}
+	return nil
+}

vendor/github.com/go-ole/go-ole/variant_386.go

@@ -0,0 +1,11 @@
+// +build 386
+
+package ole
+
+type VARIANT struct {
+	VT         VT     //  2
+	wReserved1 uint16 //  4
+	wReserved2 uint16 //  6
+	wReserved3 uint16 //  8
+	Val        int64  // 16
+}

vendor/github.com/go-ole/go-ole/variant_amd64.go

@@ -0,0 +1,12 @@
+// +build amd64
+
+package ole
+
+type VARIANT struct {
+	VT         VT      //  2
+	wReserved1 uint16  //  4
+	wReserved2 uint16  //  6
+	wReserved3 uint16  //  8
+	Val        int64   // 16
+	_          [8]byte // 24
+}

vendor/github.com/go-ole/go-ole/variant_date_386.go

@@ -0,0 +1,22 @@
+// +build windows,386
+
+package ole
+
+import (
+	"errors"
+	"syscall"
+	"time"
+	"unsafe"
+)
+
+// GetVariantDate converts COM Variant Time value to Go time.Time.
+func GetVariantDate(value uint64) (time.Time, error) {
+	var st syscall.Systemtime
+	v1 := uint32(value)
+	v2 := uint32(value >> 32)
+	r, _, _ := procVariantTimeToSystemTime.Call(uintptr(v1), uintptr(v2), uintptr(unsafe.Pointer(&st)))
+	if r != 0 {
+		return time.Date(int(st.Year), time.Month(st.Month), int(st.Day), int(st.Hour), int(st.Minute), int(st.Second), int(st.Milliseconds/1000), time.UTC), nil
+	}
+	return time.Now(), errors.New("Could not convert to time, passing current time.")
+}

vendor/github.com/go-ole/go-ole/variant_date_amd64.go

@@ -0,0 +1,20 @@
+// +build windows,amd64
+
+package ole
+
+import (
+	"errors"
+	"syscall"
+	"time"
+	"unsafe"
+)
+
+// GetVariantDate converts COM Variant Time value to Go time.Time.
+func GetVariantDate(value uint64) (time.Time, error) {
+	var st syscall.Systemtime
+	r, _, _ := procVariantTimeToSystemTime.Call(uintptr(value), uintptr(unsafe.Pointer(&st)))
+	if r != 0 {
+		return time.Date(int(st.Year), time.Month(st.Month), int(st.Day), int(st.Hour), int(st.Minute), int(st.Second), int(st.Milliseconds/1000), time.UTC), nil
+	}
+	return time.Now(), errors.New("Could not convert to time, passing current time.")
+}

vendor/github.com/go-ole/go-ole/variant_ppc64le.go

@@ -0,0 +1,12 @@
+// +build ppc64le
+
+package ole
+
+type VARIANT struct {
+	VT         VT      //  2
+	wReserved1 uint16  //  4
+	wReserved2 uint16  //  6
+	wReserved3 uint16  //  8
+	Val        int64   // 16
+	_          [8]byte // 24
+}

vendor/github.com/go-ole/go-ole/variant_s390x.go

@@ -0,0 +1,12 @@
+// +build s390x
+
+package ole
+
+type VARIANT struct {
+	VT         VT      //  2
+	wReserved1 uint16  //  4
+	wReserved2 uint16  //  6
+	wReserved3 uint16  //  8
+	Val        int64   // 16
+	_          [8]byte // 24
+}

vendor/github.com/go-ole/go-ole/vt_string.go

@@ -0,0 +1,58 @@
+// generated by stringer -output vt_string.go -type VT; DO NOT EDIT
+
+package ole
+
+import "fmt"
+
+const (
+	_VT_name_0 = "VT_EMPTYVT_NULLVT_I2VT_I4VT_R4VT_R8VT_CYVT_DATEVT_BSTRVT_DISPATCHVT_ERRORVT_BOOLVT_VARIANTVT_UNKNOWNVT_DECIMAL"
+	_VT_name_1 = "VT_I1VT_UI1VT_UI2VT_UI4VT_I8VT_UI8VT_INTVT_UINTVT_VOIDVT_HRESULTVT_PTRVT_SAFEARRAYVT_CARRAYVT_USERDEFINEDVT_LPSTRVT_LPWSTR"
+	_VT_name_2 = "VT_RECORDVT_INT_PTRVT_UINT_PTR"
+	_VT_name_3 = "VT_FILETIMEVT_BLOBVT_STREAMVT_STORAGEVT_STREAMED_OBJECTVT_STORED_OBJECTVT_BLOB_OBJECTVT_CFVT_CLSID"
+	_VT_name_4 = "VT_BSTR_BLOBVT_VECTOR"
+	_VT_name_5 = "VT_ARRAY"
+	_VT_name_6 = "VT_BYREF"
+	_VT_name_7 = "VT_RESERVED"
+	_VT_name_8 = "VT_ILLEGAL"
+)
+
+var (
+	_VT_index_0 = [...]uint8{0, 8, 15, 20, 25, 30, 35, 40, 47, 54, 65, 73, 80, 90, 100, 110}
+	_VT_index_1 = [...]uint8{0, 5, 11, 17, 23, 28, 34, 40, 47, 54, 64, 70, 82, 91, 105, 113, 122}
+	_VT_index_2 = [...]uint8{0, 9, 19, 30}
+	_VT_index_3 = [...]uint8{0, 11, 18, 27, 37, 55, 71, 85, 90, 98}
+	_VT_index_4 = [...]uint8{0, 12, 21}
+	_VT_index_5 = [...]uint8{0, 8}
+	_VT_index_6 = [...]uint8{0, 8}
+	_VT_index_7 = [...]uint8{0, 11}
+	_VT_index_8 = [...]uint8{0, 10}
+)
+
+func (i VT) String() string {
+	switch {
+	case 0 <= i && i <= 14:
+		return _VT_name_0[_VT_index_0[i]:_VT_index_0[i+1]]
+	case 16 <= i && i <= 31:
+		i -= 16
+		return _VT_name_1[_VT_index_1[i]:_VT_index_1[i+1]]
+	case 36 <= i && i <= 38:
+		i -= 36
+		return _VT_name_2[_VT_index_2[i]:_VT_index_2[i+1]]
+	case 64 <= i && i <= 72:
+		i -= 64
+		return _VT_name_3[_VT_index_3[i]:_VT_index_3[i+1]]
+	case 4095 <= i && i <= 4096:
+		i -= 4095
+		return _VT_name_4[_VT_index_4[i]:_VT_index_4[i+1]]
+	case i == 8192:
+		return _VT_name_5
+	case i == 16384:
+		return _VT_name_6
+	case i == 32768:
+		return _VT_name_7
+	case i == 65535:
+		return _VT_name_8
+	default:
+		return fmt.Sprintf("VT(%d)", i)
+	}
+}

vendor/github.com/go-ole/go-ole/winrt.go

@@ -0,0 +1,99 @@
+// +build windows
+
+package ole
+
+import (
+	"reflect"
+	"syscall"
+	"unicode/utf8"
+	"unsafe"
+)
+
+var (
+	procRoInitialize              = modcombase.NewProc("RoInitialize")
+	procRoActivateInstance        = modcombase.NewProc("RoActivateInstance")
+	procRoGetActivationFactory    = modcombase.NewProc("RoGetActivationFactory")
+	procWindowsCreateString       = modcombase.NewProc("WindowsCreateString")
+	procWindowsDeleteString       = modcombase.NewProc("WindowsDeleteString")
+	procWindowsGetStringRawBuffer = modcombase.NewProc("WindowsGetStringRawBuffer")
+)
+
+func RoInitialize(thread_type uint32) (err error) {
+	hr, _, _ := procRoInitialize.Call(uintptr(thread_type))
+	if hr != 0 {
+		err = NewError(hr)
+	}
+	return
+}
+
+func RoActivateInstance(clsid string) (ins *IInspectable, err error) {
+	hClsid, err := NewHString(clsid)
+	if err != nil {
+		return nil, err
+	}
+	defer DeleteHString(hClsid)
+
+	hr, _, _ := procRoActivateInstance.Call(
+		uintptr(unsafe.Pointer(hClsid)),
+		uintptr(unsafe.Pointer(&ins)))
+	if hr != 0 {
+		err = NewError(hr)
+	}
+	return
+}
+
+func RoGetActivationFactory(clsid string, iid *GUID) (ins *IInspectable, err error) {
+	hClsid, err := NewHString(clsid)
+	if err != nil {
+		return nil, err
+	}
+	defer DeleteHString(hClsid)
+
+	hr, _, _ := procRoGetActivationFactory.Call(
+		uintptr(unsafe.Pointer(hClsid)),
+		uintptr(unsafe.Pointer(iid)),
+		uintptr(unsafe.Pointer(&ins)))
+	if hr != 0 {
+		err = NewError(hr)
+	}
+	return
+}
+
+// HString is handle string for pointers.
+type HString uintptr
+
+// NewHString returns a new HString for Go string.
+func NewHString(s string) (hstring HString, err error) {
+	u16 := syscall.StringToUTF16Ptr(s)
+	len := uint32(utf8.RuneCountInString(s))
+	hr, _, _ := procWindowsCreateString.Call(
+		uintptr(unsafe.Pointer(u16)),
+		uintptr(len),
+		uintptr(unsafe.Pointer(&hstring)))
+	if hr != 0 {
+		err = NewError(hr)
+	}
+	return
+}
+
+// DeleteHString deletes HString.
+func DeleteHString(hstring HString) (err error) {
+	hr, _, _ := procWindowsDeleteString.Call(uintptr(hstring))
+	if hr != 0 {
+		err = NewError(hr)
+	}
+	return
+}
+
+// String returns Go string value of HString.
+func (h HString) String() string {
+	var u16buf uintptr
+	var u16len uint32
+	u16buf, _, _ = procWindowsGetStringRawBuffer.Call(
+		uintptr(h),
+		uintptr(unsafe.Pointer(&u16len)))
+
+	u16hdr := reflect.SliceHeader{Data: u16buf, Len: int(u16len), Cap: int(u16len)}
+	u16 := *(*[]uint16)(unsafe.Pointer(&u16hdr))
+	return syscall.UTF16ToString(u16)
+}

vendor/github.com/go-ole/go-ole/winrt_doc.go

@@ -0,0 +1,36 @@
+// +build !windows
+
+package ole
+
+// RoInitialize
+func RoInitialize(thread_type uint32) (err error) {
+	return NewError(E_NOTIMPL)
+}
+
+// RoActivateInstance
+func RoActivateInstance(clsid string) (ins *IInspectable, err error) {
+	return nil, NewError(E_NOTIMPL)
+}
+
+// RoGetActivationFactory
+func RoGetActivationFactory(clsid string, iid *GUID) (ins *IInspectable, err error) {
+	return nil, NewError(E_NOTIMPL)
+}
+
+// HString is handle string for pointers.
+type HString uintptr
+
+// NewHString returns a new HString for Go string.
+func NewHString(s string) (hstring HString, err error) {
+	return HString(uintptr(0)), NewError(E_NOTIMPL)
+}
+
+// DeleteHString deletes HString.
+func DeleteHString(hstring HString) (err error) {
+	return NewError(E_NOTIMPL)
+}
+
+// String returns Go string value of HString.
+func (h HString) String() string {
+	return ""
+}

vendor/github.com/mackerelio/go-osstat/LICENSE.txt

@@ -0,0 +1,178 @@
+
+                                 Apache License
+                           Version 2.0, January 2004
+                        http://www.apache.org/licenses/
+
+   TERMS AND CONDITIONS FOR USE, REPRODUCTION, AND DISTRIBUTION
+
+   1. Definitions.
+
+      "License" shall mean the terms and conditions for use, reproduction,
+      and distribution as defined by Sections 1 through 9 of this document.
+
+      "Licensor" shall mean the copyright owner or entity authorized by
+      the copyright owner that is granting the License.
+
+      "Legal Entity" shall mean the union of the acting entity and all
+      other entities that control, are controlled by, or are under common
+      control with that entity. For the purposes of this definition,
+      "control" means (i) the power, direct or indirect, to cause the
+      direction or management of such entity, whether by contract or
+      otherwise, or (ii) ownership of fifty percent (50%) or more of the
+      outstanding shares, or (iii) beneficial ownership of such entity.
+
+      "You" (or "Your") shall mean an individual or Legal Entity
+      exercising permissions granted by this License.
+
+      "Source" form shall mean the preferred form for making modifications,
+      including but not limited to software source code, documentation
+      source, and configuration files.
+
+      "Object" form shall mean any form resulting from mechanical
+      transformation or translation of a Source form, including but
+      not limited to compiled object code, generated documentation,
+      and conversions to other media types.
+
+      "Work" shall mean the work of authorship, whether in Source or
+      Object form, made available under the License, as indicated by a
+      copyright notice that is included in or attached to the work
+      (an example is provided in the Appendix below).
+
+      "Derivative Works" shall mean any work, whether in Source or Object
+      form, that is based on (or derived from) the Work and for which the
+      editorial revisions, annotations, elaborations, or other modifications
+      represent, as a whole, an original work of authorship. For the purposes
+      of this License, Derivative Works shall not include works that remain
+      separable from, or merely link (or bind by name) to the interfaces of,
+      the Work and Derivative Works thereof.
+
+      "Contribution" shall mean any work of authorship, including
+      the original version of the Work and any modifications or additions
+      to that Work or Derivative Works thereof, that is intentionally
+      submitted to Licensor for inclusion in the Work by the copyright owner
+      or by an individual or Legal Entity authorized to submit on behalf of
+      the copyright owner. For the purposes of this definition, "submitted"
+      means any form of electronic, verbal, or written communication sent
+      to the Licensor or its representatives, including but not limited to
+      communication on electronic mailing lists, source code control systems,
+      and issue tracking systems that are managed by, or on behalf of, the
+      Licensor for the purpose of discussing and improving the Work, but
+      excluding communication that is conspicuously marked or otherwise
+      designated in writing by the copyright owner as "Not a Contribution."
+
+      "Contributor" shall mean Licensor and any individual or Legal Entity
+      on behalf of whom a Contribution has been received by Licensor and
+      subsequently incorporated within the Work.
+
+   2. Grant of Copyright License. Subject to the terms and conditions of
+      this License, each Contributor hereby grants to You a perpetual,
+      worldwide, non-exclusive, no-charge, royalty-free, irrevocable
+      copyright license to reproduce, prepare Derivative Works of,
+      publicly display, publicly perform, sublicense, and distribute the
+      Work and such Derivative Works in Source or Object form.
+
+   3. Grant of Patent License. Subject to the terms and conditions of
+      this License, each Contributor hereby grants to You a perpetual,
+      worldwide, non-exclusive, no-charge, royalty-free, irrevocable
+      (except as stated in this section) patent license to make, have made,
+      use, offer to sell, sell, import, and otherwise transfer the Work,
+      where such license applies only to those patent claims licensable
+      by such Contributor that are necessarily infringed by their
+      Contribution(s) alone or by combination of their Contribution(s)
+      with the Work to which such Contribution(s) was submitted. If You
+      institute patent litigation against any entity (including a
+      cross-claim or counterclaim in a lawsuit) alleging that the Work
+      or a Contribution incorporated within the Work constitutes direct
+      or contributory patent infringement, then any patent licenses
+      granted to You under this License for that Work shall terminate
+      as of the date such litigation is filed.
+
+   4. Redistribution. You may reproduce and distribute copies of the
+      Work or Derivative Works thereof in any medium, with or without
+      modifications, and in Source or Object form, provided that You
+      meet the following conditions:
+
+      (a) You must give any other recipients of the Work or
+          Derivative Works a copy of this License; and
+
+      (b) You must cause any modified files to carry prominent notices
+          stating that You changed the files; and
+
+      (c) You must retain, in the Source form of any Derivative Works
+          that You distribute, all copyright, patent, trademark, and
+          attribution notices from the Source form of the Work,
+          excluding those notices that do not pertain to any part of
+          the Derivative Works; and
+
+      (d) If the Work includes a "NOTICE" text file as part of its
+          distribution, then any Derivative Works that You distribute must
+          include a readable copy of the attribution notices contained
+          within such NOTICE file, excluding those notices that do not
+          pertain to any part of the Derivative Works, in at least one
+          of the following places: within a NOTICE text file distributed
+          as part of the Derivative Works; within the Source form or
+          documentation, if provided along with the Derivative Works; or,
+          within a display generated by the Derivative Works, if and
+          wherever such third-party notices normally appear. The contents
+          of the NOTICE file are for informational purposes only and
+          do not modify the License. You may add Your own attribution
+          notices within Derivative Works that You distribute, alongside
+          or as an addendum to the NOTICE text from the Work, provided
+          that such additional attribution notices cannot be construed
+          as modifying the License.
+
+      You may add Your own copyright statement to Your modifications and
+      may provide additional or different license terms and conditions
+      for use, reproduction, or distribution of Your modifications, or
+      for any such Derivative Works as a whole, provided Your use,
+      reproduction, and distribution of the Work otherwise complies with
+      the conditions stated in this License.
+
+   5. Submission of Contributions. Unless You explicitly state otherwise,
+      any Contribution intentionally submitted for inclusion in the Work
+      by You to the Licensor shall be under the terms and conditions of
+      this License, without any additional terms or conditions.
+      Notwithstanding the above, nothing herein shall supersede or modify
+      the terms of any separate license agreement you may have executed
+      with Licensor regarding such Contributions.
+
+   6. Trademarks. This License does not grant permission to use the trade
+      names, trademarks, service marks, or product names of the Licensor,
+      except as required for reasonable and customary use in describing the
+      origin of the Work and reproducing the content of the NOTICE file.
+
+   7. Disclaimer of Warranty. Unless required by applicable law or
+      agreed to in writing, Licensor provides the Work (and each
+      Contributor provides its Contributions) on an "AS IS" BASIS,
+      WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or
+      implied, including, without limitation, any warranties or conditions
+      of TITLE, NON-INFRINGEMENT, MERCHANTABILITY, or FITNESS FOR A
+      PARTICULAR PURPOSE. You are solely responsible for determining the
+      appropriateness of using or redistributing the Work and assume any
+      risks associated with Your exercise of permissions under this License.
+
+   8. Limitation of Liability. In no event and under no legal theory,
+      whether in tort (including negligence), contract, or otherwise,
+      unless required by applicable law (such as deliberate and grossly
+      negligent acts) or agreed to in writing, shall any Contributor be
+      liable to You for damages, including any direct, indirect, special,
+      incidental, or consequential damages of any character arising as a
+      result of this License or out of the use or inability to use the
+      Work (including but not limited to damages for loss of goodwill,
+      work stoppage, computer failure or malfunction, or any and all
+      other commercial damages or losses), even if such Contributor
+      has been advised of the possibility of such damages.
+
+   9. Accepting Warranty or Additional Liability. While redistributing
+      the Work or Derivative Works thereof, You may choose to offer,
+      and charge a fee for, acceptance of support, warranty, indemnity,
+      or other liability obligations and/or rights consistent with this
+      License. However, in accepting such obligations, You may act only
+      on Your own behalf and on Your sole responsibility, not on behalf
+      of any other Contributor, and only if You agree to indemnify,
+      defend, and hold each Contributor harmless for any liability
+      incurred by, or claims asserted against, such Contributor by reason
+      of your accepting any such warranty or additional liability.
+
+   END OF TERMS AND CONDITIONS
+

vendor/github.com/mackerelio/go-osstat/loadavg/loadavg.go

@@ -0,0 +1,11 @@
+package loadavg
+
+// Get load average
+func Get() (*Stats, error) {
+	return get()
+}
+
+// Stats represents load average values
+type Stats struct {
+	Loadavg1, Loadavg5, Loadavg15 float64
+}

vendor/github.com/mackerelio/go-osstat/loadavg/loadavg_bsd_nocgo.go

@@ -0,0 +1,38 @@
+// +build darwin freebsd netbsd openbsd
+// +build !cgo
+
+package loadavg
+
+import (
+	"fmt"
+	"unsafe"
+
+	"golang.org/x/sys/unix"
+)
+
+func get() (*Stats, error) {
+	ret, err := unix.SysctlRaw("vm.loadavg")
+	if err != nil {
+		return nil, fmt.Errorf("failed in sysctl vm.loadavg: %s", err)
+	}
+	return collectLoadavgStats(ret)
+}
+
+// loadavg in sys/sysctl.h
+type loadStruct struct {
+	Ldavg  [3]uint32
+	Fscale uint64
+}
+
+// Reference: sys/sysctl.h
+func collectLoadavgStats(out []byte) (*Stats, error) {
+	if len(out) != 24 {
+		return nil, fmt.Errorf("unexpected output of sysctl vm.loadavg: %v (len: %d)", out, len(out))
+	}
+	load := *(*loadStruct)(unsafe.Pointer(&out[0]))
+	return &Stats{
+		Loadavg1:  float64(load.Ldavg[0]) / float64(load.Fscale),
+		Loadavg5:  float64(load.Ldavg[1]) / float64(load.Fscale),
+		Loadavg15: float64(load.Ldavg[2]) / float64(load.Fscale),
+	}, nil
+}

vendor/github.com/mackerelio/go-osstat/loadavg/loadavg_unix.go

@@ -0,0 +1,24 @@
+// +build !windows,cgo
+
+package loadavg
+
+import (
+	"errors"
+)
+
+// #include <stdlib.h>
+import "C"
+
+// Reference: man 3 getloadavg
+func get() (*Stats, error) {
+	var loadavgs [3]C.double
+	ret := C.getloadavg(&loadavgs[0], 3)
+	if ret != 3 {
+		return nil, errors.New("failed to get loadavg")
+	}
+	return &Stats{
+		Loadavg1:  float64(loadavgs[0]),
+		Loadavg5:  float64(loadavgs[1]),
+		Loadavg15: float64(loadavgs[2]),
+	}, nil
+}

vendor/github.com/mackerelio/go-osstat/loadavg/loadavg_unix_nocgo.go

@@ -0,0 +1,28 @@
+// +build linux,!cgo
+
+package loadavg
+
+import (
+	"fmt"
+	"io"
+	"os"
+)
+
+func get() (*Stats, error) {
+	// Reference: man 5 proc, loadavg_proc_show in Linux source code
+	file, err := os.Open("/proc/loadavg")
+	if err != nil {
+		return nil, err
+	}
+	defer file.Close()
+	return collectLoadavgStats(file)
+}
+
+func collectLoadavgStats(out io.Reader) (*Stats, error) {
+	var loadavg Stats
+	ret, err := fmt.Fscanf(out, "%f %f %f", &loadavg.Loadavg1, &loadavg.Loadavg5, &loadavg.Loadavg15)
+	if err != nil || ret != 3 {
+		return nil, fmt.Errorf("unexpected format of /proc/loadavg")
+	}
+	return &loadavg, nil
+}

vendor/github.com/mackerelio/go-osstat/loadavg/loadavg_windows.go

@@ -0,0 +1,11 @@
+// +build windows
+
+package loadavg
+
+import (
+	"errors"
+)
+
+func get() (*Stats, error) {
+	return nil, errors.New("loadavg for Windows is not supported")
+}

vendor/github.com/mackerelio/go-osstat/memory/memory_darwin.go

@@ -0,0 +1,126 @@
+// +build darwin
+
+package memory
+
+import (
+	"bufio"
+	"context"
+	"fmt"
+	"io"
+	"os/exec"
+	"strconv"
+	"strings"
+	"time"
+	"unsafe"
+
+	"golang.org/x/sys/unix"
+)
+
+// Get memory statistics
+func Get() (*Stats, error) {
+	ctx, cancel := context.WithTimeout(context.Background(), 10*time.Second)
+	defer cancel()
+
+	// Reference: man 1 vm_stat
+	cmd := exec.CommandContext(ctx, "vm_stat")
+	out, err := cmd.StdoutPipe()
+	if err != nil {
+		return nil, err
+	}
+	if err := cmd.Start(); err != nil {
+		return nil, err
+	}
+	memory, err := collectMemoryStats(out)
+	if err != nil {
+		go cmd.Wait()
+		return nil, err
+	}
+	if err := cmd.Wait(); err != nil {
+		return nil, err
+	}
+
+	// Reference: sys/sysctl.h, man 3 sysctl, sysctl vm.swapusage
+	ret, err := unix.SysctlRaw("vm.swapusage")
+	if err != nil {
+		return nil, fmt.Errorf("failed in sysctl vm.swapusage: %s", err)
+	}
+	swap, err := collectSwapStats(ret)
+	if err != nil {
+		return nil, err
+	}
+	memory.SwapTotal = swap.Total
+	memory.SwapUsed = swap.Used
+	memory.SwapFree = swap.Avail
+
+	return memory, nil
+}
+
+// Stats represents memory statistics for darwin
+type Stats struct {
+	Total, Used, Cached, Free, Active, Inactive, SwapTotal, SwapUsed, SwapFree uint64
+}
+
+// References:
+//   - https://support.apple.com/en-us/HT201464#memory
+//   - https://developer.apple.com/library/content/documentation/Performance/Conceptual/ManagingMemoryStats/Articles/AboutMemoryStats.html
+//   - https://opensource.apple.com/source/system_cmds/system_cmds-790/vm_stat.tproj/
+func collectMemoryStats(out io.Reader) (*Stats, error) {
+	scanner := bufio.NewScanner(out)
+	if !scanner.Scan() {
+		return nil, fmt.Errorf("failed to scan output of vm_stat")
+	}
+	line := scanner.Text()
+	if !strings.HasPrefix(line, "Mach Virtual Memory Statistics:") {
+		return nil, fmt.Errorf("unexpected output of vm_stat: %s", line)
+	}
+
+	var memory Stats
+	var speculative, wired, purgeable, fileBacked, compressed uint64
+	memStats := map[string]*uint64{
+		"Pages free":                   &memory.Free,
+		"Pages active":                 &memory.Active,
+		"Pages inactive":               &memory.Inactive,
+		"Pages speculative":            &speculative,
+		"Pages wired down":             &wired,
+		"Pages purgeable":              &purgeable,
+		"File-backed pages":            &fileBacked,
+		"Pages occupied by compressor": &compressed,
+	}
+	for scanner.Scan() {
+		line := scanner.Text()
+		i := strings.IndexRune(line, ':')
+		if i < 0 {
+			continue
+		}
+		if ptr := memStats[line[:i]]; ptr != nil {
+			val := strings.TrimRight(strings.TrimSpace(line[i+1:]), ".")
+			if v, err := strconv.ParseUint(val, 10, 64); err == nil {
+				*ptr = v * 4096
+			}
+		}
+	}
+	if err := scanner.Err(); err != nil {
+		return nil, fmt.Errorf("scan error for vm_stat: %s", err)
+	}
+
+	memory.Cached = purgeable + fileBacked
+	memory.Used = wired + compressed + memory.Active + memory.Inactive + speculative - memory.Cached
+	memory.Total = memory.Used + memory.Cached + memory.Free
+	return &memory, nil
+}
+
+// xsw_usage in sys/sysctl.h
+type swapUsage struct {
+	Total     uint64
+	Avail     uint64
+	Used      uint64
+	Pagesize  int32
+	Encrypted bool
+}
+
+func collectSwapStats(out []byte) (*swapUsage, error) {
+	if len(out) != 32 {
+		return nil, fmt.Errorf("unexpected output of sysctl vm.swapusage: %v (len: %d)", out, len(out))
+	}
+	return (*swapUsage)(unsafe.Pointer(&out[0])), nil
+}

vendor/github.com/mackerelio/go-osstat/memory/memory_freebsd.go

@@ -0,0 +1,118 @@
+// +build freebsd
+
+package memory
+
+import (
+	"bufio"
+	"context"
+	"fmt"
+	"io"
+	"os/exec"
+	"strconv"
+	"strings"
+	"time"
+	"unsafe"
+
+	"golang.org/x/sys/unix"
+)
+
+// Get memory statistics
+func Get() (*Stats, error) {
+	return collectMemoryStats()
+}
+
+// Stats represents memory statistics for freebsd
+type Stats struct {
+	Total, Used, Cached, Free, Active, Inactive, Wired,
+	SwapTotal, SwapUsed, SwapFree uint64
+}
+
+type memStat struct {
+	name  string
+	ptr   *uint64
+	scale *uint64
+}
+
+func collectMemoryStats() (*Stats, error) {
+	var pageSize uint64
+	one := uint64(1)
+
+	var memory Stats
+	memStats := []memStat{
+		{"vm.stats.vm.v_page_size", &pageSize, &one},
+		{"hw.physmem", &memory.Total, &one},
+		{"vm.stats.vm.v_cache_count", &memory.Cached, &pageSize},
+		{"vm.stats.vm.v_free_count", &memory.Free, &pageSize},
+		{"vm.stats.vm.v_active_count", &memory.Active, &pageSize},
+		{"vm.stats.vm.v_inactive_count", &memory.Inactive, &pageSize},
+		{"vm.stats.vm.v_wire_count", &memory.Wired, &pageSize},
+	}
+
+	for _, stat := range memStats {
+		ret, err := unix.SysctlRaw(stat.name)
+		if err != nil {
+			return nil, fmt.Errorf("failed in sysctl %s: %s", stat.name, err)
+		}
+		if len(ret) == 8 {
+			*stat.ptr = *(*uint64)(unsafe.Pointer(&ret[0])) * *stat.scale
+		} else if len(ret) == 4 {
+			*stat.ptr = uint64(*(*uint32)(unsafe.Pointer(&ret[0]))) * *stat.scale
+		} else {
+			return nil, fmt.Errorf("failed in sysctl %s: %s", stat.name, err)
+		}
+	}
+
+	ctx, cancel := context.WithTimeout(context.Background(), 10*time.Second)
+	defer cancel()
+
+	// collect swap statistics from swapinfo command
+	cmd := exec.CommandContext(ctx, "swapinfo", "-k")
+	out, err := cmd.StdoutPipe()
+	if err != nil {
+		return nil, err
+	}
+	if err := cmd.Start(); err != nil {
+		return nil, err
+	}
+	memory.SwapTotal, memory.SwapUsed, err = collectSwapStats(out)
+	if err != nil {
+		go cmd.Wait()
+		return nil, err
+	}
+	if err := cmd.Wait(); err != nil {
+		return nil, err
+	}
+
+	memory.Used = memory.Total - memory.Free - memory.Cached - memory.Inactive
+	memory.SwapFree = memory.SwapTotal - memory.SwapUsed
+
+	return &memory, nil
+}
+
+func collectSwapStats(out io.Reader) (uint64, uint64, error) {
+	scanner := bufio.NewScanner(out)
+	if !scanner.Scan() {
+		return 0, 0, fmt.Errorf("failed to scan output of swapinfo")
+	}
+	line := scanner.Text()
+	if !strings.HasPrefix(line, "Device") {
+		return 0, 0, fmt.Errorf("unexpected output of swapinfo: %s", line)
+	}
+
+	var total, used uint64
+	for scanner.Scan() {
+		line := scanner.Text()
+		fields := strings.Fields(line)
+		if len(fields) < 5 {
+			continue
+		}
+		if v, err := strconv.ParseUint(fields[1], 10, 64); err == nil {
+			total += v * 1024
+		}
+		if v, err := strconv.ParseUint(fields[2], 10, 64); err == nil {
+			used += v * 1024
+		}
+	}
+
+	return total, used, nil
+}

vendor/github.com/mackerelio/go-osstat/memory/memory_linux.go

@@ -0,0 +1,84 @@
+// +build linux
+
+package memory
+
+import (
+	"bufio"
+	"fmt"
+	"io"
+	"os"
+	"strconv"
+	"strings"
+)
+
+// Get memory statistics
+func Get() (*Stats, error) {
+	// Reference: man 5 proc, Documentation/filesystems/proc.txt in Linux source code
+	file, err := os.Open("/proc/meminfo")
+	if err != nil {
+		return nil, err
+	}
+	defer file.Close()
+	return collectMemoryStats(file)
+}
+
+// Stats represents memory statistics for linux
+type Stats struct {
+	Total, Used, Buffers, Cached, Free, Available, Active, Inactive,
+	SwapTotal, SwapUsed, SwapCached, SwapFree, Mapped, Shmem, Slab,
+	PageTables, Committed, VmallocUsed uint64
+	MemAvailableEnabled bool
+}
+
+func collectMemoryStats(out io.Reader) (*Stats, error) {
+	scanner := bufio.NewScanner(out)
+	var memory Stats
+	memStats := map[string]*uint64{
+		"MemTotal":     &memory.Total,
+		"MemFree":      &memory.Free,
+		"MemAvailable": &memory.Available,
+		"Buffers":      &memory.Buffers,
+		"Cached":       &memory.Cached,
+		"Active":       &memory.Active,
+		"Inactive":     &memory.Inactive,
+		"SwapCached":   &memory.SwapCached,
+		"SwapTotal":    &memory.SwapTotal,
+		"SwapFree":     &memory.SwapFree,
+		"Mapped":       &memory.Mapped,
+		"Shmem":        &memory.Shmem,
+		"Slab":         &memory.Slab,
+		"PageTables":   &memory.PageTables,
+		"Committed_AS": &memory.Committed,
+		"VmallocUsed":  &memory.VmallocUsed,
+	}
+	for scanner.Scan() {
+		line := scanner.Text()
+		i := strings.IndexRune(line, ':')
+		if i < 0 {
+			continue
+		}
+		fld := line[:i]
+		if ptr := memStats[fld]; ptr != nil {
+			val := strings.TrimSpace(strings.TrimRight(line[i+1:], "kB"))
+			if v, err := strconv.ParseUint(val, 10, 64); err == nil {
+				*ptr = v * 1024
+			}
+			if fld == "MemAvailable" {
+				memory.MemAvailableEnabled = true
+			}
+		}
+	}
+	if err := scanner.Err(); err != nil {
+		return nil, fmt.Errorf("scan error for /proc/meminfo: %s", err)
+	}
+
+	memory.SwapUsed = memory.SwapTotal - memory.SwapFree
+
+	if memory.MemAvailableEnabled {
+		memory.Used = memory.Total - memory.Available
+	} else {
+		memory.Used = memory.Total - memory.Free - memory.Buffers - memory.Cached
+	}
+
+	return &memory, nil
+}

vendor/github.com/mackerelio/go-osstat/memory/memory_other.go

@@ -0,0 +1,18 @@
+// +build !linux,!darwin,!windows,!freebsd
+
+package memory
+
+import (
+	"fmt"
+	"runtime"
+)
+
+// Get memory statistics
+func Get() (*Stats, error) {
+	return nil, fmt.Errorf("memory statistics not implemented for: %s", runtime.GOOS)
+}
+
+// Stats represents memory statistics
+type Stats struct {
+	Total, Used, Cached, Free, Active, Inactive, SwapTotal, SwapUsed, SwapFree uint64
+}

vendor/github.com/mackerelio/go-osstat/memory/memory_windows.go

@@ -0,0 +1,53 @@
+// +build windows
+
+package memory
+
+import (
+	"fmt"
+	"syscall"
+	"unsafe"
+)
+
+var (
+	kernel32             = syscall.NewLazyDLL("kernel32.dll")
+	globalMemoryStatusEx = kernel32.NewProc("GlobalMemoryStatusEx")
+)
+
+// Get memory statistics
+func Get() (*Stats, error) {
+	var memoryStatus memoryStatusEx
+	memoryStatus.Length = uint32(unsafe.Sizeof(memoryStatus))
+
+	ret, _, err := globalMemoryStatusEx.Call(uintptr(unsafe.Pointer(&memoryStatus)))
+	if ret == 0 {
+		return nil, fmt.Errorf("failed in GlobalMemoryStatusEx: %s", err)
+	}
+
+	var memory Stats
+	memory.Free = memoryStatus.AvailPhys
+	memory.Total = memoryStatus.TotalPhys
+	memory.Used = memory.Total - memory.Free
+	memory.PageFileTotal = memoryStatus.TotalPageFile
+	memory.PageFileFree = memoryStatus.AvailPageFile
+	memory.VirtualTotal = memoryStatus.TotalVirtual
+	memory.VirtualFree = memoryStatus.AvailVirtual
+
+	return &memory, nil
+}
+
+type memoryStatusEx struct {
+	Length               uint32
+	MemoryLoad           uint32
+	TotalPhys            uint64
+	AvailPhys            uint64
+	TotalPageFile        uint64
+	AvailPageFile        uint64
+	TotalVirtual         uint64
+	AvailVirtual         uint64
+	AvailExtendedVirtual uint64
+}
+
+// Stats represents memory statistics for Windows
+type Stats struct {
+	Total, Used, Free, PageFileTotal, PageFileFree, VirtualTotal, VirtualFree uint64
+}

vendor/github.com/rs/zerolog/.gitignore

@@ -0,0 +1,25 @@
+# Compiled Object files, Static and Dynamic libs (Shared Objects)
+*.o
+*.a
+*.so
+
+# Folders
+_obj
+_test
+tmp
+
+# Architecture specific extensions/prefixes
+*.[568vq]
+[568vq].out
+
+*.cgo1.go
+*.cgo2.c
+_cgo_defun.c
+_cgo_gotypes.go
+_cgo_export.*
+
+_testmain.go
+
+*.exe
+*.test
+*.prof

vendor/github.com/rs/zerolog/CNAME

@@ -0,0 +1 @@
+zerolog.io

vendor/github.com/rs/zerolog/LICENSE

@@ -0,0 +1,21 @@
+MIT License
+
+Copyright (c) 2017 Olivier Poitrey
+
+Permission is hereby granted, free of charge, to any person obtaining a copy
+of this software and associated documentation files (the "Software"), to deal
+in the Software without restriction, including without limitation the rights
+to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+copies of the Software, and to permit persons to whom the Software is
+furnished to do so, subject to the following conditions:
+
+The above copyright notice and this permission notice shall be included in all
+copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+SOFTWARE.

vendor/github.com/rs/zerolog/README.md

@@ -0,0 +1,695 @@
+# Zero Allocation JSON Logger
+
+[![godoc](http://img.shields.io/badge/godoc-reference-blue.svg?style=flat)](https://godoc.org/github.com/rs/zerolog) [![license](http://img.shields.io/badge/license-MIT-red.svg?style=flat)](https://raw.githubusercontent.com/rs/zerolog/master/LICENSE) [![Build Status](https://travis-ci.org/rs/zerolog.svg?branch=master)](https://travis-ci.org/rs/zerolog) [![Coverage](http://gocover.io/_badge/github.com/rs/zerolog)](http://gocover.io/github.com/rs/zerolog)
+
+The zerolog package provides a fast and simple logger dedicated to JSON output.
+
+Zerolog's API is designed to provide both a great developer experience and stunning [performance](#benchmarks). Its unique chaining API allows zerolog to write JSON (or CBOR) log events by avoiding allocations and reflection.
+
+Uber's [zap](https://godoc.org/go.uber.org/zap) library pioneered this approach. Zerolog is taking this concept to the next level with a simpler to use API and even better performance.
+
+To keep the code base and the API simple, zerolog focuses on efficient structured logging only. Pretty logging on the console is made possible using the provided (but inefficient) [`zerolog.ConsoleWriter`](#pretty-logging).
+
+![Pretty Logging Image](pretty.png)
+
+## Who uses zerolog
+
+Find out [who uses zerolog](https://github.com/rs/zerolog/wiki/Who-uses-zerolog) and add your company / project to the list.
+
+## Features
+
+* [Blazing fast](#benchmarks)
+* [Low to zero allocation](#benchmarks)
+* [Leveled logging](#leveled-logging)
+* [Sampling](#log-sampling)
+* [Hooks](#hooks)
+* [Contextual fields](#contextual-logging)
+* `context.Context` integration
+* [Integration with `net/http`](#integration-with-nethttp)
+* [JSON and CBOR encoding formats](#binary-encoding)
+* [Pretty logging for development](#pretty-logging)
+* [Error Logging (with optional Stacktrace)](#error-logging)
+
+## Installation
+
+```bash
+go get -u github.com/rs/zerolog/log
+```
+
+## Getting Started
+
+### Simple Logging Example
+
+For simple logging, import the global logger package **github.com/rs/zerolog/log**
+
+```go
+package main
+
+import (
+    "github.com/rs/zerolog"
+    "github.com/rs/zerolog/log"
+)
+
+func main() {
+    // UNIX Time is faster and smaller than most timestamps
+    zerolog.TimeFieldFormat = zerolog.TimeFormatUnix
+
+    log.Print("hello world")
+}
+
+// Output: {"time":1516134303,"level":"debug","message":"hello world"}
+```
+> Note: By default log writes to `os.Stderr`
+> Note: The default log level for `log.Print` is *debug*
+
+### Contextual Logging
+
+**zerolog** allows data to be added to log messages in the form of key:value pairs. The data added to the message adds "context" about the log event that can be critical for debugging as well as myriad other purposes. An example of this is below:
+
+```go
+package main
+
+import (
+    "github.com/rs/zerolog"
+    "github.com/rs/zerolog/log"
+)
+
+func main() {
+    zerolog.TimeFieldFormat = zerolog.TimeFormatUnix
+
+    log.Debug().
+        Str("Scale", "833 cents").
+        Float64("Interval", 833.09).
+        Msg("Fibonacci is everywhere")
+    
+    log.Debug().
+        Str("Name", "Tom").
+        Send()
+}
+
+// Output: {"level":"debug","Scale":"833 cents","Interval":833.09,"time":1562212768,"message":"Fibonacci is everywhere"}
+// Output: {"level":"debug","Name":"Tom","time":1562212768}
+```
+
+> You'll note in the above example that when adding contextual fields, the fields are strongly typed. You can find the full list of supported fields [here](#standard-types)
+
+### Leveled Logging
+
+#### Simple Leveled Logging Example
+
+```go
+package main
+
+import (
+    "github.com/rs/zerolog"
+    "github.com/rs/zerolog/log"
+)
+
+func main() {
+    zerolog.TimeFieldFormat = zerolog.TimeFormatUnix
+
+    log.Info().Msg("hello world")
+}
+
+// Output: {"time":1516134303,"level":"info","message":"hello world"}
+```
+
+> It is very important to note that when using the **zerolog** chaining API, as shown above (`log.Info().Msg("hello world"`), the chain must have either the `Msg` or `Msgf` method call. If you forget to add either of these, the log will not occur and there is no compile time error to alert you of this.
+
+**zerolog** allows for logging at the following levels (from highest to lowest):
+
+* panic (`zerolog.PanicLevel`, 5)
+* fatal (`zerolog.FatalLevel`, 4)
+* error (`zerolog.ErrorLevel`, 3)
+* warn (`zerolog.WarnLevel`, 2)
+* info (`zerolog.InfoLevel`, 1)
+* debug (`zerolog.DebugLevel`, 0)
+* trace (`zerolog.TraceLevel`, -1)
+
+You can set the Global logging level to any of these options using the `SetGlobalLevel` function in the zerolog package, passing in one of the given constants above, e.g. `zerolog.InfoLevel` would be the "info" level.  Whichever level is chosen, all logs with a level greater than or equal to that level will be written. To turn off logging entirely, pass the `zerolog.Disabled` constant.
+
+#### Setting Global Log Level
+
+This example uses command-line flags to demonstrate various outputs depending on the chosen log level.
+
+```go
+package main
+
+import (
+    "flag"
+
+    "github.com/rs/zerolog"
+    "github.com/rs/zerolog/log"
+)
+
+func main() {
+    zerolog.TimeFieldFormat = zerolog.TimeFormatUnix
+    debug := flag.Bool("debug", false, "sets log level to debug")
+
+    flag.Parse()
+
+    // Default level for this example is info, unless debug flag is present
+    zerolog.SetGlobalLevel(zerolog.InfoLevel)
+    if *debug {
+        zerolog.SetGlobalLevel(zerolog.DebugLevel)
+    }
+
+    log.Debug().Msg("This message appears only when log level set to Debug")
+    log.Info().Msg("This message appears when log level set to Debug or Info")
+
+    if e := log.Debug(); e.Enabled() {
+        // Compute log output only if enabled.
+        value := "bar"
+        e.Str("foo", value).Msg("some debug message")
+    }
+}
+```
+
+Info Output (no flag)
+
+```bash
+$ ./logLevelExample
+{"time":1516387492,"level":"info","message":"This message appears when log level set to Debug or Info"}
+```
+
+Debug Output (debug flag set)
+
+```bash
+$ ./logLevelExample -debug
+{"time":1516387573,"level":"debug","message":"This message appears only when log level set to Debug"}
+{"time":1516387573,"level":"info","message":"This message appears when log level set to Debug or Info"}
+{"time":1516387573,"level":"debug","foo":"bar","message":"some debug message"}
+```
+
+#### Logging without Level or Message
+
+You may choose to log without a specific level by using the `Log` method. You may also write without a message by setting an empty string in the `msg string` parameter of the `Msg` method. Both are demonstrated in the example below.
+
+```go
+package main
+
+import (
+    "github.com/rs/zerolog"
+    "github.com/rs/zerolog/log"
+)
+
+func main() {
+    zerolog.TimeFieldFormat = zerolog.TimeFormatUnix
+
+    log.Log().
+        Str("foo", "bar").
+        Msg("")
+}
+
+// Output: {"time":1494567715,"foo":"bar"}
+```
+
+### Error Logging
+
+You can log errors using the `Err` method
+
+```go
+package main
+
+import (
+	"errors"
+
+	"github.com/rs/zerolog"
+	"github.com/rs/zerolog/log"
+)
+
+func main() {
+	zerolog.TimeFieldFormat = zerolog.TimeFormatUnix
+
+	err := errors.New("seems we have an error here")
+	log.Error().Err(err).Msg("")
+}
+
+// Output: {"level":"error","error":"seems we have an error here","time":1609085256}
+```
+
+> The default field name for errors is `error`, you can change this by setting `zerolog.ErrorFieldName` to meet your needs.
+
+#### Error Logging with Stacktrace
+
+Using `github.com/pkg/errors`, you can add a formatted stacktrace to your errors. 
+
+```go
+package main
+
+import (
+	"github.com/pkg/errors"
+	"github.com/rs/zerolog/pkgerrors"
+
+	"github.com/rs/zerolog"
+	"github.com/rs/zerolog/log"
+)
+
+func main() {
+	zerolog.TimeFieldFormat = zerolog.TimeFormatUnix
+	zerolog.ErrorStackMarshaler = pkgerrors.MarshalStack
+
+	err := outer()
+	log.Error().Stack().Err(err).Msg("")
+}
+
+func inner() error {
+	return errors.New("seems we have an error here")
+}
+
+func middle() error {
+	err := inner()
+	if err != nil {
+		return err
+	}
+	return nil
+}
+
+func outer() error {
+	err := middle()
+	if err != nil {
+		return err
+	}
+	return nil
+}
+
+// Output: {"level":"error","stack":[{"func":"inner","line":"20","source":"errors.go"},{"func":"middle","line":"24","source":"errors.go"},{"func":"outer","line":"32","source":"errors.go"},{"func":"main","line":"15","source":"errors.go"},{"func":"main","line":"204","source":"proc.go"},{"func":"goexit","line":"1374","source":"asm_amd64.s"}],"error":"seems we have an error here","time":1609086683}
+```
+
+> zerolog.ErrorStackMarshaler must be set in order for the stack to output anything.
+
+#### Logging Fatal Messages
+
+```go
+package main
+
+import (
+    "errors"
+
+    "github.com/rs/zerolog"
+    "github.com/rs/zerolog/log"
+)
+
+func main() {
+    err := errors.New("A repo man spends his life getting into tense situations")
+    service := "myservice"
+
+    zerolog.TimeFieldFormat = zerolog.TimeFormatUnix
+
+    log.Fatal().
+        Err(err).
+        Str("service", service).
+        Msgf("Cannot start %s", service)
+}
+
+// Output: {"time":1516133263,"level":"fatal","error":"A repo man spends his life getting into tense situations","service":"myservice","message":"Cannot start myservice"}
+//         exit status 1
+```
+
+> NOTE: Using `Msgf` generates one allocation even when the logger is disabled.
+
+
+### Create logger instance to manage different outputs
+
+```go
+logger := zerolog.New(os.Stderr).With().Timestamp().Logger()
+
+logger.Info().Str("foo", "bar").Msg("hello world")
+
+// Output: {"level":"info","time":1494567715,"message":"hello world","foo":"bar"}
+```
+
+### Sub-loggers let you chain loggers with additional context
+
+```go
+sublogger := log.With().
+                 Str("component", "foo").
+                 Logger()
+sublogger.Info().Msg("hello world")
+
+// Output: {"level":"info","time":1494567715,"message":"hello world","component":"foo"}
+```
+
+### Pretty logging
+
+To log a human-friendly, colorized output, use `zerolog.ConsoleWriter`:
+
+```go
+log.Logger = log.Output(zerolog.ConsoleWriter{Out: os.Stderr})
+
+log.Info().Str("foo", "bar").Msg("Hello world")
+
+// Output: 3:04PM INF Hello World foo=bar
+```
+
+To customize the configuration and formatting:
+
+```go
+output := zerolog.ConsoleWriter{Out: os.Stdout, TimeFormat: time.RFC3339}
+output.FormatLevel = func(i interface{}) string {
+    return strings.ToUpper(fmt.Sprintf("| %-6s|", i))
+}
+output.FormatMessage = func(i interface{}) string {
+    return fmt.Sprintf("***%s****", i)
+}
+output.FormatFieldName = func(i interface{}) string {
+    return fmt.Sprintf("%s:", i)
+}
+output.FormatFieldValue = func(i interface{}) string {
+    return strings.ToUpper(fmt.Sprintf("%s", i))
+}
+
+log := zerolog.New(output).With().Timestamp().Logger()
+
+log.Info().Str("foo", "bar").Msg("Hello World")
+
+// Output: 2006-01-02T15:04:05Z07:00 | INFO  | ***Hello World**** foo:BAR
+```
+
+### Sub dictionary
+
+```go
+log.Info().
+    Str("foo", "bar").
+    Dict("dict", zerolog.Dict().
+        Str("bar", "baz").
+        Int("n", 1),
+    ).Msg("hello world")
+
+// Output: {"level":"info","time":1494567715,"foo":"bar","dict":{"bar":"baz","n":1},"message":"hello world"}
+```
+
+### Customize automatic field names
+
+```go
+zerolog.TimestampFieldName = "t"
+zerolog.LevelFieldName = "l"
+zerolog.MessageFieldName = "m"
+
+log.Info().Msg("hello world")
+
+// Output: {"l":"info","t":1494567715,"m":"hello world"}
+```
+
+### Add contextual fields to the global logger
+
+```go
+log.Logger = log.With().Str("foo", "bar").Logger()
+```
+
+### Add file and line number to log
+
+```go
+log.Logger = log.With().Caller().Logger()
+log.Info().Msg("hello world")
+
+// Output: {"level": "info", "message": "hello world", "caller": "/go/src/your_project/some_file:21"}
+```
+
+
+### Thread-safe, lock-free, non-blocking writer
+
+If your writer might be slow or not thread-safe and you need your log producers to never get slowed down by a slow writer, you can use a `diode.Writer` as follow:
+
+```go
+wr := diode.NewWriter(os.Stdout, 1000, 10*time.Millisecond, func(missed int) {
+		fmt.Printf("Logger Dropped %d messages", missed)
+	})
+log := zerolog.New(wr)
+log.Print("test")
+```
+
+You will need to install `code.cloudfoundry.org/go-diodes` to use this feature.
+
+### Log Sampling
+
+```go
+sampled := log.Sample(&zerolog.BasicSampler{N: 10})
+sampled.Info().Msg("will be logged every 10 messages")
+
+// Output: {"time":1494567715,"level":"info","message":"will be logged every 10 messages"}
+```
+
+More advanced sampling:
+
+```go
+// Will let 5 debug messages per period of 1 second.
+// Over 5 debug message, 1 every 100 debug messages are logged.
+// Other levels are not sampled.
+sampled := log.Sample(zerolog.LevelSampler{
+    DebugSampler: &zerolog.BurstSampler{
+        Burst: 5,
+        Period: 1*time.Second,
+        NextSampler: &zerolog.BasicSampler{N: 100},
+    },
+})
+sampled.Debug().Msg("hello world")
+
+// Output: {"time":1494567715,"level":"debug","message":"hello world"}
+```
+
+### Hooks
+
+```go
+type SeverityHook struct{}
+
+func (h SeverityHook) Run(e *zerolog.Event, level zerolog.Level, msg string) {
+    if level != zerolog.NoLevel {
+        e.Str("severity", level.String())
+    }
+}
+
+hooked := log.Hook(SeverityHook{})
+hooked.Warn().Msg("")
+
+// Output: {"level":"warn","severity":"warn"}
+```
+
+### Pass a sub-logger by context
+
+```go
+ctx := log.With().Str("component", "module").Logger().WithContext(ctx)
+
+log.Ctx(ctx).Info().Msg("hello world")
+
+// Output: {"component":"module","level":"info","message":"hello world"}
+```
+
+### Set as standard logger output
+
+```go
+log := zerolog.New(os.Stdout).With().
+    Str("foo", "bar").
+    Logger()
+
+stdlog.SetFlags(0)
+stdlog.SetOutput(log)
+
+stdlog.Print("hello world")
+
+// Output: {"foo":"bar","message":"hello world"}
+```
+
+### Integration with `net/http`
+
+The `github.com/rs/zerolog/hlog` package provides some helpers to integrate zerolog with `http.Handler`.
+
+In this example we use [alice](https://github.com/justinas/alice) to install logger for better readability.
+
+```go
+log := zerolog.New(os.Stdout).With().
+    Timestamp().
+    Str("role", "my-service").
+    Str("host", host).
+    Logger()
+
+c := alice.New()
+
+// Install the logger handler with default output on the console
+c = c.Append(hlog.NewHandler(log))
+
+// Install some provided extra handler to set some request's context fields.
+// Thanks to that handler, all our logs will come with some prepopulated fields.
+c = c.Append(hlog.AccessHandler(func(r *http.Request, status, size int, duration time.Duration) {
+    hlog.FromRequest(r).Info().
+        Str("method", r.Method).
+        Stringer("url", r.URL).
+        Int("status", status).
+        Int("size", size).
+        Dur("duration", duration).
+        Msg("")
+}))
+c = c.Append(hlog.RemoteAddrHandler("ip"))
+c = c.Append(hlog.UserAgentHandler("user_agent"))
+c = c.Append(hlog.RefererHandler("referer"))
+c = c.Append(hlog.RequestIDHandler("req_id", "Request-Id"))
+
+// Here is your final handler
+h := c.Then(http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
+    // Get the logger from the request's context. You can safely assume it
+    // will be always there: if the handler is removed, hlog.FromRequest
+    // will return a no-op logger.
+    hlog.FromRequest(r).Info().
+        Str("user", "current user").
+        Str("status", "ok").
+        Msg("Something happened")
+
+    // Output: {"level":"info","time":"2001-02-03T04:05:06Z","role":"my-service","host":"local-hostname","req_id":"b4g0l5t6tfid6dtrapu0","user":"current user","status":"ok","message":"Something happened"}
+}))
+http.Handle("/", h)
+
+if err := http.ListenAndServe(":8080", nil); err != nil {
+    log.Fatal().Err(err).Msg("Startup failed")
+}
+```
+
+## Multiple Log Output
+`zerolog.MultiLevelWriter` may be used to send the log message to multiple outputs. 
+In this example, we send the log message to both `os.Stdout` and the in-built ConsoleWriter.
+```go
+func main() {
+	consoleWriter := zerolog.ConsoleWriter{Out: os.Stdout}
+
+	multi := zerolog.MultiLevelWriter(consoleWriter, os.Stdout)
+
+	logger := zerolog.New(multi).With().Timestamp().Logger()
+
+	logger.Info().Msg("Hello World!")
+}
+
+// Output (Line 1: Console; Line 2: Stdout)
+// 12:36PM INF Hello World!
+// {"level":"info","time":"2019-11-07T12:36:38+03:00","message":"Hello World!"}
+``` 
+
+## Global Settings
+
+Some settings can be changed and will by applied to all loggers:
+
+* `log.Logger`: You can set this value to customize the global logger (the one used by package level methods).
+* `zerolog.SetGlobalLevel`: Can raise the minimum level of all loggers. Call this with `zerolog.Disabled` to disable logging altogether (quiet mode).
+* `zerolog.DisableSampling`: If argument is `true`, all sampled loggers will stop sampling and issue 100% of their log events.
+* `zerolog.TimestampFieldName`: Can be set to customize `Timestamp` field name.
+* `zerolog.LevelFieldName`: Can be set to customize level field name.
+* `zerolog.MessageFieldName`: Can be set to customize message field name.
+* `zerolog.ErrorFieldName`: Can be set to customize `Err` field name.
+* `zerolog.TimeFieldFormat`: Can be set to customize `Time` field value formatting. If set with `zerolog.TimeFormatUnix`, `zerolog.TimeFormatUnixMs` or `zerolog.TimeFormatUnixMicro`, times are formated as UNIX timestamp.
+* `zerolog.DurationFieldUnit`: Can be set to customize the unit for time.Duration type fields added by `Dur` (default: `time.Millisecond`).
+* `zerolog.DurationFieldInteger`: If set to `true`, `Dur` fields are formatted as integers instead of floats (default: `false`). 
+* `zerolog.ErrorHandler`: Called whenever zerolog fails to write an event on its output. If not set, an error is printed on the stderr. This handler must be thread safe and non-blocking.
+
+## Field Types
+
+### Standard Types
+
+* `Str`
+* `Bool`
+* `Int`, `Int8`, `Int16`, `Int32`, `Int64`
+* `Uint`, `Uint8`, `Uint16`, `Uint32`, `Uint64`
+* `Float32`, `Float64`
+
+### Advanced Fields
+
+* `Err`: Takes an `error` and renders it as a string using the `zerolog.ErrorFieldName` field name.
+* `Func`: Run a `func` only if the level is enabled.
+* `Timestamp`: Inserts a timestamp field with `zerolog.TimestampFieldName` field name, formatted using `zerolog.TimeFieldFormat`.
+* `Time`: Adds a field with time formatted with `zerolog.TimeFieldFormat`.
+* `Dur`: Adds a field with `time.Duration`.
+* `Dict`: Adds a sub-key/value as a field of the event.
+* `RawJSON`: Adds a field with an already encoded JSON (`[]byte`)
+* `Hex`: Adds a field with value formatted as a hexadecimal string (`[]byte`)
+* `Interface`: Uses reflection to marshal the type.
+
+Most fields are also available in the slice format (`Strs` for `[]string`, `Errs` for `[]error` etc.)
+
+## Binary Encoding
+
+In addition to the default JSON encoding, `zerolog` can produce binary logs using [CBOR](http://cbor.io) encoding. The choice of encoding can be decided at compile time using the build tag `binary_log` as follows:
+
+```bash
+go build -tags binary_log .
+```
+
+To Decode binary encoded log files you can use any CBOR decoder. One has been tested to work
+with zerolog library is [CSD](https://github.com/toravir/csd/).
+
+## Related Projects
+
+* [grpc-zerolog](https://github.com/cheapRoc/grpc-zerolog): Implementation of `grpclog.LoggerV2` interface using `zerolog`
+* [overlog](https://github.com/Trendyol/overlog): Implementation of `Mapped Diagnostic Context` interface using `zerolog`
+* [zerologr](https://github.com/hn8/zerologr): Implementation of `logr.LogSink` interface using `zerolog`
+
+## Benchmarks
+
+See [logbench](http://hackemist.com/logbench/) for more comprehensive and up-to-date benchmarks.
+
+All operations are allocation free (those numbers *include* JSON encoding):
+
+```text
+BenchmarkLogEmpty-8        100000000    19.1 ns/op     0 B/op       0 allocs/op
+BenchmarkDisabled-8        500000000    4.07 ns/op     0 B/op       0 allocs/op
+BenchmarkInfo-8            30000000     42.5 ns/op     0 B/op       0 allocs/op
+BenchmarkContextFields-8   30000000     44.9 ns/op     0 B/op       0 allocs/op
+BenchmarkLogFields-8       10000000     184 ns/op      0 B/op       0 allocs/op
+```
+
+There are a few Go logging benchmarks and comparisons that include zerolog.
+
+* [imkira/go-loggers-bench](https://github.com/imkira/go-loggers-bench)
+* [uber-common/zap](https://github.com/uber-go/zap#performance)
+
+Using Uber's zap comparison benchmark:
+
+Log a message and 10 fields:
+
+| Library | Time | Bytes Allocated | Objects Allocated |
+| :--- | :---: | :---: | :---: |
+| zerolog | 767 ns/op | 552 B/op | 6 allocs/op |
+| :zap: zap | 848 ns/op | 704 B/op | 2 allocs/op |
+| :zap: zap (sugared) | 1363 ns/op | 1610 B/op | 20 allocs/op |
+| go-kit | 3614 ns/op | 2895 B/op | 66 allocs/op |
+| lion | 5392 ns/op | 5807 B/op | 63 allocs/op |
+| logrus | 5661 ns/op | 6092 B/op | 78 allocs/op |
+| apex/log | 15332 ns/op | 3832 B/op | 65 allocs/op |
+| log15 | 20657 ns/op | 5632 B/op | 93 allocs/op |
+
+Log a message with a logger that already has 10 fields of context:
+
+| Library | Time | Bytes Allocated | Objects Allocated |
+| :--- | :---: | :---: | :---: |
+| zerolog | 52 ns/op | 0 B/op | 0 allocs/op |
+| :zap: zap | 283 ns/op | 0 B/op | 0 allocs/op |
+| :zap: zap (sugared) | 337 ns/op | 80 B/op | 2 allocs/op |
+| lion | 2702 ns/op | 4074 B/op | 38 allocs/op |
+| go-kit | 3378 ns/op | 3046 B/op | 52 allocs/op |
+| logrus | 4309 ns/op | 4564 B/op | 63 allocs/op |
+| apex/log | 13456 ns/op | 2898 B/op | 51 allocs/op |
+| log15 | 14179 ns/op | 2642 B/op | 44 allocs/op |
+
+Log a static string, without any context or `printf`-style templating:
+
+| Library | Time | Bytes Allocated | Objects Allocated |
+| :--- | :---: | :---: | :---: |
+| zerolog | 50 ns/op | 0 B/op | 0 allocs/op |
+| :zap: zap | 236 ns/op | 0 B/op | 0 allocs/op |
+| standard library | 453 ns/op | 80 B/op | 2 allocs/op |
+| :zap: zap (sugared) | 337 ns/op | 80 B/op | 2 allocs/op |
+| go-kit | 508 ns/op | 656 B/op | 13 allocs/op |
+| lion | 771 ns/op | 1224 B/op | 10 allocs/op |
+| logrus | 1244 ns/op | 1505 B/op | 27 allocs/op |
+| apex/log | 2751 ns/op | 584 B/op | 11 allocs/op |
+| log15 | 5181 ns/op | 1592 B/op | 26 allocs/op |
+
+## Caveats
+
+Note that zerolog does no de-duplication of fields. Using the same key multiple times creates multiple keys in final JSON:
+
+```go
+logger := zerolog.New(os.Stderr).With().Timestamp().Logger()
+logger.Info().
+       Timestamp().
+       Msg("dup")
+// Output: {"level":"info","time":1494567715,"time":1494567715,"message":"dup"}
+```
+
+In this case, many consumers will take the last value, but this is not guaranteed; check yours if in doubt.

vendor/github.com/rs/zerolog/_config.yml

@@ -0,0 +1 @@
+remote_theme: rs/gh-readme

vendor/github.com/rs/zerolog/array.go

@@ -0,0 +1,233 @@
+package zerolog
+
+import (
+	"net"
+	"sync"
+	"time"
+)
+
+var arrayPool = &sync.Pool{
+	New: func() interface{} {
+		return &Array{
+			buf: make([]byte, 0, 500),
+		}
+	},
+}
+
+// Array is used to prepopulate an array of items
+// which can be re-used to add to log messages.
+type Array struct {
+	buf []byte
+}
+
+func putArray(a *Array) {
+	// Proper usage of a sync.Pool requires each entry to have approximately
+	// the same memory cost. To obtain this property when the stored type
+	// contains a variably-sized buffer, we add a hard limit on the maximum buffer
+	// to place back in the pool.
+	//
+	// See https://golang.org/issue/23199
+	const maxSize = 1 << 16 // 64KiB
+	if cap(a.buf) > maxSize {
+		return
+	}
+	arrayPool.Put(a)
+}
+
+// Arr creates an array to be added to an Event or Context.
+func Arr() *Array {
+	a := arrayPool.Get().(*Array)
+	a.buf = a.buf[:0]
+	return a
+}
+
+// MarshalZerologArray method here is no-op - since data is
+// already in the needed format.
+func (*Array) MarshalZerologArray(*Array) {
+}
+
+func (a *Array) write(dst []byte) []byte {
+	dst = enc.AppendArrayStart(dst)
+	if len(a.buf) > 0 {
+		dst = append(append(dst, a.buf...))
+	}
+	dst = enc.AppendArrayEnd(dst)
+	putArray(a)
+	return dst
+}
+
+// Object marshals an object that implement the LogObjectMarshaler
+// interface and append append it to the array.
+func (a *Array) Object(obj LogObjectMarshaler) *Array {
+	e := Dict()
+	obj.MarshalZerologObject(e)
+	e.buf = enc.AppendEndMarker(e.buf)
+	a.buf = append(enc.AppendArrayDelim(a.buf), e.buf...)
+	putEvent(e)
+	return a
+}
+
+// Str append append the val as a string to the array.
+func (a *Array) Str(val string) *Array {
+	a.buf = enc.AppendString(enc.AppendArrayDelim(a.buf), val)
+	return a
+}
+
+// Bytes append append the val as a string to the array.
+func (a *Array) Bytes(val []byte) *Array {
+	a.buf = enc.AppendBytes(enc.AppendArrayDelim(a.buf), val)
+	return a
+}
+
+// Hex append append the val as a hex string to the array.
+func (a *Array) Hex(val []byte) *Array {
+	a.buf = enc.AppendHex(enc.AppendArrayDelim(a.buf), val)
+	return a
+}
+
+// RawJSON adds already encoded JSON to the array.
+func (a *Array) RawJSON(val []byte) *Array {
+	a.buf = appendJSON(enc.AppendArrayDelim(a.buf), val)
+	return a
+}
+
+// Err serializes and appends the err to the array.
+func (a *Array) Err(err error) *Array {
+	switch m := ErrorMarshalFunc(err).(type) {
+	case LogObjectMarshaler:
+		e := newEvent(nil, 0)
+		e.buf = e.buf[:0]
+		e.appendObject(m)
+		a.buf = append(enc.AppendArrayDelim(a.buf), e.buf...)
+		putEvent(e)
+	case error:
+		if m == nil || isNilValue(m) {
+			a.buf = enc.AppendNil(enc.AppendArrayDelim(a.buf))
+		} else {
+			a.buf = enc.AppendString(enc.AppendArrayDelim(a.buf), m.Error())
+		}
+	case string:
+		a.buf = enc.AppendString(enc.AppendArrayDelim(a.buf), m)
+	default:
+		a.buf = enc.AppendInterface(enc.AppendArrayDelim(a.buf), m)
+	}
+
+	return a
+}
+
+// Bool append append the val as a bool to the array.
+func (a *Array) Bool(b bool) *Array {
+	a.buf = enc.AppendBool(enc.AppendArrayDelim(a.buf), b)
+	return a
+}
+
+// Int append append i as a int to the array.
+func (a *Array) Int(i int) *Array {
+	a.buf = enc.AppendInt(enc.AppendArrayDelim(a.buf), i)
+	return a
+}
+
+// Int8 append append i as a int8 to the array.
+func (a *Array) Int8(i int8) *Array {
+	a.buf = enc.AppendInt8(enc.AppendArrayDelim(a.buf), i)
+	return a
+}
+
+// Int16 append append i as a int16 to the array.
+func (a *Array) Int16(i int16) *Array {
+	a.buf = enc.AppendInt16(enc.AppendArrayDelim(a.buf), i)
+	return a
+}
+
+// Int32 append append i as a int32 to the array.
+func (a *Array) Int32(i int32) *Array {
+	a.buf = enc.AppendInt32(enc.AppendArrayDelim(a.buf), i)
+	return a
+}
+
+// Int64 append append i as a int64 to the array.
+func (a *Array) Int64(i int64) *Array {
+	a.buf = enc.AppendInt64(enc.AppendArrayDelim(a.buf), i)
+	return a
+}
+
+// Uint append append i as a uint to the array.
+func (a *Array) Uint(i uint) *Array {
+	a.buf = enc.AppendUint(enc.AppendArrayDelim(a.buf), i)
+	return a
+}
+
+// Uint8 append append i as a uint8 to the array.
+func (a *Array) Uint8(i uint8) *Array {
+	a.buf = enc.AppendUint8(enc.AppendArrayDelim(a.buf), i)
+	return a
+}
+
+// Uint16 append append i as a uint16 to the array.
+func (a *Array) Uint16(i uint16) *Array {
+	a.buf = enc.AppendUint16(enc.AppendArrayDelim(a.buf), i)
+	return a
+}
+
+// Uint32 append append i as a uint32 to the array.
+func (a *Array) Uint32(i uint32) *Array {
+	a.buf = enc.AppendUint32(enc.AppendArrayDelim(a.buf), i)
+	return a
+}
+
+// Uint64 append append i as a uint64 to the array.
+func (a *Array) Uint64(i uint64) *Array {
+	a.buf = enc.AppendUint64(enc.AppendArrayDelim(a.buf), i)
+	return a
+}
+
+// Float32 append append f as a float32 to the array.
+func (a *Array) Float32(f float32) *Array {
+	a.buf = enc.AppendFloat32(enc.AppendArrayDelim(a.buf), f)
+	return a
+}
+
+// Float64 append append f as a float64 to the array.
+func (a *Array) Float64(f float64) *Array {
+	a.buf = enc.AppendFloat64(enc.AppendArrayDelim(a.buf), f)
+	return a
+}
+
+// Time append append t formated as string using zerolog.TimeFieldFormat.
+func (a *Array) Time(t time.Time) *Array {
+	a.buf = enc.AppendTime(enc.AppendArrayDelim(a.buf), t, TimeFieldFormat)
+	return a
+}
+
+// Dur append append d to the array.
+func (a *Array) Dur(d time.Duration) *Array {
+	a.buf = enc.AppendDuration(enc.AppendArrayDelim(a.buf), d, DurationFieldUnit, DurationFieldInteger)
+	return a
+}
+
+// Interface append append i marshaled using reflection.
+func (a *Array) Interface(i interface{}) *Array {
+	if obj, ok := i.(LogObjectMarshaler); ok {
+		return a.Object(obj)
+	}
+	a.buf = enc.AppendInterface(enc.AppendArrayDelim(a.buf), i)
+	return a
+}
+
+// IPAddr adds IPv4 or IPv6 address to the array
+func (a *Array) IPAddr(ip net.IP) *Array {
+	a.buf = enc.AppendIPAddr(enc.AppendArrayDelim(a.buf), ip)
+	return a
+}
+
+// IPPrefix adds IPv4 or IPv6 Prefix (IP + mask) to the array
+func (a *Array) IPPrefix(pfx net.IPNet) *Array {
+	a.buf = enc.AppendIPPrefix(enc.AppendArrayDelim(a.buf), pfx)
+	return a
+}
+
+// MACAddr adds a MAC (Ethernet) address to the array
+func (a *Array) MACAddr(ha net.HardwareAddr) *Array {
+	a.buf = enc.AppendMACAddr(enc.AppendArrayDelim(a.buf), ha)
+	return a
+}

vendor/github.com/rs/zerolog/console.go

@@ -0,0 +1,409 @@
+package zerolog
+
+import (
+	"bytes"
+	"encoding/json"
+	"fmt"
+	"io"
+	"os"
+	"path/filepath"
+	"sort"
+	"strconv"
+	"strings"
+	"sync"
+	"time"
+)
+
+const (
+	colorBlack = iota + 30
+	colorRed
+	colorGreen
+	colorYellow
+	colorBlue
+	colorMagenta
+	colorCyan
+	colorWhite
+
+	colorBold     = 1
+	colorDarkGray = 90
+)
+
+var (
+	consoleBufPool = sync.Pool{
+		New: func() interface{} {
+			return bytes.NewBuffer(make([]byte, 0, 100))
+		},
+	}
+)
+
+const (
+	consoleDefaultTimeFormat = time.Kitchen
+)
+
+// Formatter transforms the input into a formatted string.
+type Formatter func(interface{}) string
+
+// ConsoleWriter parses the JSON input and writes it in an
+// (optionally) colorized, human-friendly format to Out.
+type ConsoleWriter struct {
+	// Out is the output destination.
+	Out io.Writer
+
+	// NoColor disables the colorized output.
+	NoColor bool
+
+	// TimeFormat specifies the format for timestamp in output.
+	TimeFormat string
+
+	// PartsOrder defines the order of parts in output.
+	PartsOrder []string
+
+	// PartsExclude defines parts to not display in output.
+	PartsExclude []string
+
+	FormatTimestamp     Formatter
+	FormatLevel         Formatter
+	FormatCaller        Formatter
+	FormatMessage       Formatter
+	FormatFieldName     Formatter
+	FormatFieldValue    Formatter
+	FormatErrFieldName  Formatter
+	FormatErrFieldValue Formatter
+}
+
+// NewConsoleWriter creates and initializes a new ConsoleWriter.
+func NewConsoleWriter(options ...func(w *ConsoleWriter)) ConsoleWriter {
+	w := ConsoleWriter{
+		Out:        os.Stdout,
+		TimeFormat: consoleDefaultTimeFormat,
+		PartsOrder: consoleDefaultPartsOrder(),
+	}
+
+	for _, opt := range options {
+		opt(&w)
+	}
+
+	return w
+}
+
+// Write transforms the JSON input with formatters and appends to w.Out.
+func (w ConsoleWriter) Write(p []byte) (n int, err error) {
+	if w.PartsOrder == nil {
+		w.PartsOrder = consoleDefaultPartsOrder()
+	}
+
+	var buf = consoleBufPool.Get().(*bytes.Buffer)
+	defer func() {
+		buf.Reset()
+		consoleBufPool.Put(buf)
+	}()
+
+	var evt map[string]interface{}
+	p = decodeIfBinaryToBytes(p)
+	d := json.NewDecoder(bytes.NewReader(p))
+	d.UseNumber()
+	err = d.Decode(&evt)
+	if err != nil {
+		return n, fmt.Errorf("cannot decode event: %s", err)
+	}
+
+	for _, p := range w.PartsOrder {
+		w.writePart(buf, evt, p)
+	}
+
+	w.writeFields(evt, buf)
+
+	err = buf.WriteByte('\n')
+	if err != nil {
+		return n, err
+	}
+	_, err = buf.WriteTo(w.Out)
+	return len(p), err
+}
+
+// writeFields appends formatted key-value pairs to buf.
+func (w ConsoleWriter) writeFields(evt map[string]interface{}, buf *bytes.Buffer) {
+	var fields = make([]string, 0, len(evt))
+	for field := range evt {
+		switch field {
+		case LevelFieldName, TimestampFieldName, MessageFieldName, CallerFieldName:
+			continue
+		}
+		fields = append(fields, field)
+	}
+	sort.Strings(fields)
+
+	if len(fields) > 0 {
+		buf.WriteByte(' ')
+	}
+
+	// Move the "error" field to the front
+	ei := sort.Search(len(fields), func(i int) bool { return fields[i] >= ErrorFieldName })
+	if ei < len(fields) && fields[ei] == ErrorFieldName {
+		fields[ei] = ""
+		fields = append([]string{ErrorFieldName}, fields...)
+		var xfields = make([]string, 0, len(fields))
+		for _, field := range fields {
+			if field == "" { // Skip empty fields
+				continue
+			}
+			xfields = append(xfields, field)
+		}
+		fields = xfields
+	}
+
+	for i, field := range fields {
+		var fn Formatter
+		var fv Formatter
+
+		if field == ErrorFieldName {
+			if w.FormatErrFieldName == nil {
+				fn = consoleDefaultFormatErrFieldName(w.NoColor)
+			} else {
+				fn = w.FormatErrFieldName
+			}
+
+			if w.FormatErrFieldValue == nil {
+				fv = consoleDefaultFormatErrFieldValue(w.NoColor)
+			} else {
+				fv = w.FormatErrFieldValue
+			}
+		} else {
+			if w.FormatFieldName == nil {
+				fn = consoleDefaultFormatFieldName(w.NoColor)
+			} else {
+				fn = w.FormatFieldName
+			}
+
+			if w.FormatFieldValue == nil {
+				fv = consoleDefaultFormatFieldValue
+			} else {
+				fv = w.FormatFieldValue
+			}
+		}
+
+		buf.WriteString(fn(field))
+
+		switch fValue := evt[field].(type) {
+		case string:
+			if needsQuote(fValue) {
+				buf.WriteString(fv(strconv.Quote(fValue)))
+			} else {
+				buf.WriteString(fv(fValue))
+			}
+		case json.Number:
+			buf.WriteString(fv(fValue))
+		default:
+			b, err := json.Marshal(fValue)
+			if err != nil {
+				fmt.Fprintf(buf, colorize("[error: %v]", colorRed, w.NoColor), err)
+			} else {
+				fmt.Fprint(buf, fv(b))
+			}
+		}
+
+		if i < len(fields)-1 { // Skip space for last field
+			buf.WriteByte(' ')
+		}
+	}
+}
+
+// writePart appends a formatted part to buf.
+func (w ConsoleWriter) writePart(buf *bytes.Buffer, evt map[string]interface{}, p string) {
+	var f Formatter
+
+	if w.PartsExclude != nil && len(w.PartsExclude) > 0 {
+		for _, exclude := range w.PartsExclude {
+			if exclude == p {
+				return
+			}
+		}
+	}
+
+	switch p {
+	case LevelFieldName:
+		if w.FormatLevel == nil {
+			f = consoleDefaultFormatLevel(w.NoColor)
+		} else {
+			f = w.FormatLevel
+		}
+	case TimestampFieldName:
+		if w.FormatTimestamp == nil {
+			f = consoleDefaultFormatTimestamp(w.TimeFormat, w.NoColor)
+		} else {
+			f = w.FormatTimestamp
+		}
+	case MessageFieldName:
+		if w.FormatMessage == nil {
+			f = consoleDefaultFormatMessage
+		} else {
+			f = w.FormatMessage
+		}
+	case CallerFieldName:
+		if w.FormatCaller == nil {
+			f = consoleDefaultFormatCaller(w.NoColor)
+		} else {
+			f = w.FormatCaller
+		}
+	default:
+		if w.FormatFieldValue == nil {
+			f = consoleDefaultFormatFieldValue
+		} else {
+			f = w.FormatFieldValue
+		}
+	}
+
+	var s = f(evt[p])
+
+	if len(s) > 0 {
+		buf.WriteString(s)
+		if p != w.PartsOrder[len(w.PartsOrder)-1] { // Skip space for last part
+			buf.WriteByte(' ')
+		}
+	}
+}
+
+// needsQuote returns true when the string s should be quoted in output.
+func needsQuote(s string) bool {
+	for i := range s {
+		if s[i] < 0x20 || s[i] > 0x7e || s[i] == ' ' || s[i] == '\\' || s[i] == '"' {
+			return true
+		}
+	}
+	return false
+}
+
+// colorize returns the string s wrapped in ANSI code c, unless disabled is true.
+func colorize(s interface{}, c int, disabled bool) string {
+	if disabled {
+		return fmt.Sprintf("%s", s)
+	}
+	return fmt.Sprintf("\x1b[%dm%v\x1b[0m", c, s)
+}
+
+// ----- DEFAULT FORMATTERS ---------------------------------------------------
+
+func consoleDefaultPartsOrder() []string {
+	return []string{
+		TimestampFieldName,
+		LevelFieldName,
+		CallerFieldName,
+		MessageFieldName,
+	}
+}
+
+func consoleDefaultFormatTimestamp(timeFormat string, noColor bool) Formatter {
+	if timeFormat == "" {
+		timeFormat = consoleDefaultTimeFormat
+	}
+	return func(i interface{}) string {
+		t := "<nil>"
+		switch tt := i.(type) {
+		case string:
+			ts, err := time.Parse(TimeFieldFormat, tt)
+			if err != nil {
+				t = tt
+			} else {
+				t = ts.Format(timeFormat)
+			}
+		case json.Number:
+			i, err := tt.Int64()
+			if err != nil {
+				t = tt.String()
+			} else {
+				var sec, nsec int64 = i, 0
+				switch TimeFieldFormat {
+				case TimeFormatUnixMs:
+					nsec = int64(time.Duration(i) * time.Millisecond)
+					sec = 0
+				case TimeFormatUnixMicro:
+					nsec = int64(time.Duration(i) * time.Microsecond)
+					sec = 0
+				}
+				ts := time.Unix(sec, nsec).UTC()
+				t = ts.Format(timeFormat)
+			}
+		}
+		return colorize(t, colorDarkGray, noColor)
+	}
+}
+
+func consoleDefaultFormatLevel(noColor bool) Formatter {
+	return func(i interface{}) string {
+		var l string
+		if ll, ok := i.(string); ok {
+			switch ll {
+			case LevelTraceValue:
+				l = colorize("TRC", colorMagenta, noColor)
+			case LevelDebugValue:
+				l = colorize("DBG", colorYellow, noColor)
+			case LevelInfoValue:
+				l = colorize("INF", colorGreen, noColor)
+			case LevelWarnValue:
+				l = colorize("WRN", colorRed, noColor)
+			case LevelErrorValue:
+				l = colorize(colorize("ERR", colorRed, noColor), colorBold, noColor)
+			case LevelFatalValue:
+				l = colorize(colorize("FTL", colorRed, noColor), colorBold, noColor)
+			case LevelPanicValue:
+				l = colorize(colorize("PNC", colorRed, noColor), colorBold, noColor)
+			default:
+				l = colorize("???", colorBold, noColor)
+			}
+		} else {
+			if i == nil {
+				l = colorize("???", colorBold, noColor)
+			} else {
+				l = strings.ToUpper(fmt.Sprintf("%s", i))[0:3]
+			}
+		}
+		return l
+	}
+}
+
+func consoleDefaultFormatCaller(noColor bool) Formatter {
+	return func(i interface{}) string {
+		var c string
+		if cc, ok := i.(string); ok {
+			c = cc
+		}
+		if len(c) > 0 {
+			if cwd, err := os.Getwd(); err == nil {
+				if rel, err := filepath.Rel(cwd, c); err == nil {
+					c = rel
+				}
+			}
+			c = colorize(c, colorBold, noColor) + colorize(" >", colorCyan, noColor)
+		}
+		return c
+	}
+}
+
+func consoleDefaultFormatMessage(i interface{}) string {
+	if i == nil {
+		return ""
+	}
+	return fmt.Sprintf("%s", i)
+}
+
+func consoleDefaultFormatFieldName(noColor bool) Formatter {
+	return func(i interface{}) string {
+		return colorize(fmt.Sprintf("%s=", i), colorCyan, noColor)
+	}
+}
+
+func consoleDefaultFormatFieldValue(i interface{}) string {
+	return fmt.Sprintf("%s", i)
+}
+
+func consoleDefaultFormatErrFieldName(noColor bool) Formatter {
+	return func(i interface{}) string {
+		return colorize(fmt.Sprintf("%s=", i), colorRed, noColor)
+	}
+}
+
+func consoleDefaultFormatErrFieldValue(noColor bool) Formatter {
+	return func(i interface{}) string {
+		return colorize(fmt.Sprintf("%s", i), colorRed, noColor)
+	}
+}

vendor/github.com/rs/zerolog/context.go

@@ -0,0 +1,433 @@
+package zerolog
+
+import (
+	"fmt"
+	"io/ioutil"
+	"math"
+	"net"
+	"time"
+)
+
+// Context configures a new sub-logger with contextual fields.
+type Context struct {
+	l Logger
+}
+
+// Logger returns the logger with the context previously set.
+func (c Context) Logger() Logger {
+	return c.l
+}
+
+// Fields is a helper function to use a map or slice to set fields using type assertion.
+// Only map[string]interface{} and []interface{} are accepted. []interface{} must
+// alternate string keys and arbitrary values, and extraneous ones are ignored.
+func (c Context) Fields(fields interface{}) Context {
+	c.l.context = appendFields(c.l.context, fields)
+	return c
+}
+
+// Dict adds the field key with the dict to the logger context.
+func (c Context) Dict(key string, dict *Event) Context {
+	dict.buf = enc.AppendEndMarker(dict.buf)
+	c.l.context = append(enc.AppendKey(c.l.context, key), dict.buf...)
+	putEvent(dict)
+	return c
+}
+
+// Array adds the field key with an array to the event context.
+// Use zerolog.Arr() to create the array or pass a type that
+// implement the LogArrayMarshaler interface.
+func (c Context) Array(key string, arr LogArrayMarshaler) Context {
+	c.l.context = enc.AppendKey(c.l.context, key)
+	if arr, ok := arr.(*Array); ok {
+		c.l.context = arr.write(c.l.context)
+		return c
+	}
+	var a *Array
+	if aa, ok := arr.(*Array); ok {
+		a = aa
+	} else {
+		a = Arr()
+		arr.MarshalZerologArray(a)
+	}
+	c.l.context = a.write(c.l.context)
+	return c
+}
+
+// Object marshals an object that implement the LogObjectMarshaler interface.
+func (c Context) Object(key string, obj LogObjectMarshaler) Context {
+	e := newEvent(levelWriterAdapter{ioutil.Discard}, 0)
+	e.Object(key, obj)
+	c.l.context = enc.AppendObjectData(c.l.context, e.buf)
+	putEvent(e)
+	return c
+}
+
+// EmbedObject marshals and Embeds an object that implement the LogObjectMarshaler interface.
+func (c Context) EmbedObject(obj LogObjectMarshaler) Context {
+	e := newEvent(levelWriterAdapter{ioutil.Discard}, 0)
+	e.EmbedObject(obj)
+	c.l.context = enc.AppendObjectData(c.l.context, e.buf)
+	putEvent(e)
+	return c
+}
+
+// Str adds the field key with val as a string to the logger context.
+func (c Context) Str(key, val string) Context {
+	c.l.context = enc.AppendString(enc.AppendKey(c.l.context, key), val)
+	return c
+}
+
+// Strs adds the field key with val as a string to the logger context.
+func (c Context) Strs(key string, vals []string) Context {
+	c.l.context = enc.AppendStrings(enc.AppendKey(c.l.context, key), vals)
+	return c
+}
+
+// Stringer adds the field key with val.String() (or null if val is nil) to the logger context.
+func (c Context) Stringer(key string, val fmt.Stringer) Context {
+	if val != nil {
+		c.l.context = enc.AppendString(enc.AppendKey(c.l.context, key), val.String())
+		return c
+	}
+
+	c.l.context = enc.AppendInterface(enc.AppendKey(c.l.context, key), nil)
+	return c
+}
+
+// Bytes adds the field key with val as a []byte to the logger context.
+func (c Context) Bytes(key string, val []byte) Context {
+	c.l.context = enc.AppendBytes(enc.AppendKey(c.l.context, key), val)
+	return c
+}
+
+// Hex adds the field key with val as a hex string to the logger context.
+func (c Context) Hex(key string, val []byte) Context {
+	c.l.context = enc.AppendHex(enc.AppendKey(c.l.context, key), val)
+	return c
+}
+
+// RawJSON adds already encoded JSON to context.
+//
+// No sanity check is performed on b; it must not contain carriage returns and
+// be valid JSON.
+func (c Context) RawJSON(key string, b []byte) Context {
+	c.l.context = appendJSON(enc.AppendKey(c.l.context, key), b)
+	return c
+}
+
+// AnErr adds the field key with serialized err to the logger context.
+func (c Context) AnErr(key string, err error) Context {
+	switch m := ErrorMarshalFunc(err).(type) {
+	case nil:
+		return c
+	case LogObjectMarshaler:
+		return c.Object(key, m)
+	case error:
+		if m == nil || isNilValue(m) {
+			return c
+		} else {
+			return c.Str(key, m.Error())
+		}
+	case string:
+		return c.Str(key, m)
+	default:
+		return c.Interface(key, m)
+	}
+}
+
+// Errs adds the field key with errs as an array of serialized errors to the
+// logger context.
+func (c Context) Errs(key string, errs []error) Context {
+	arr := Arr()
+	for _, err := range errs {
+		switch m := ErrorMarshalFunc(err).(type) {
+		case LogObjectMarshaler:
+			arr = arr.Object(m)
+		case error:
+			if m == nil || isNilValue(m) {
+				arr = arr.Interface(nil)
+			} else {
+				arr = arr.Str(m.Error())
+			}
+		case string:
+			arr = arr.Str(m)
+		default:
+			arr = arr.Interface(m)
+		}
+	}
+
+	return c.Array(key, arr)
+}
+
+// Err adds the field "error" with serialized err to the logger context.
+func (c Context) Err(err error) Context {
+	return c.AnErr(ErrorFieldName, err)
+}
+
+// Bool adds the field key with val as a bool to the logger context.
+func (c Context) Bool(key string, b bool) Context {
+	c.l.context = enc.AppendBool(enc.AppendKey(c.l.context, key), b)
+	return c
+}
+
+// Bools adds the field key with val as a []bool to the logger context.
+func (c Context) Bools(key string, b []bool) Context {
+	c.l.context = enc.AppendBools(enc.AppendKey(c.l.context, key), b)
+	return c
+}
+
+// Int adds the field key with i as a int to the logger context.
+func (c Context) Int(key string, i int) Context {
+	c.l.context = enc.AppendInt(enc.AppendKey(c.l.context, key), i)
+	return c
+}
+
+// Ints adds the field key with i as a []int to the logger context.
+func (c Context) Ints(key string, i []int) Context {
+	c.l.context = enc.AppendInts(enc.AppendKey(c.l.context, key), i)
+	return c
+}
+
+// Int8 adds the field key with i as a int8 to the logger context.
+func (c Context) Int8(key string, i int8) Context {
+	c.l.context = enc.AppendInt8(enc.AppendKey(c.l.context, key), i)
+	return c
+}
+
+// Ints8 adds the field key with i as a []int8 to the logger context.
+func (c Context) Ints8(key string, i []int8) Context {
+	c.l.context = enc.AppendInts8(enc.AppendKey(c.l.context, key), i)
+	return c
+}
+
+// Int16 adds the field key with i as a int16 to the logger context.
+func (c Context) Int16(key string, i int16) Context {
+	c.l.context = enc.AppendInt16(enc.AppendKey(c.l.context, key), i)
+	return c
+}
+
+// Ints16 adds the field key with i as a []int16 to the logger context.
+func (c Context) Ints16(key string, i []int16) Context {
+	c.l.context = enc.AppendInts16(enc.AppendKey(c.l.context, key), i)
+	return c
+}
+
+// Int32 adds the field key with i as a int32 to the logger context.
+func (c Context) Int32(key string, i int32) Context {
+	c.l.context = enc.AppendInt32(enc.AppendKey(c.l.context, key), i)
+	return c
+}
+
+// Ints32 adds the field key with i as a []int32 to the logger context.
+func (c Context) Ints32(key string, i []int32) Context {
+	c.l.context = enc.AppendInts32(enc.AppendKey(c.l.context, key), i)
+	return c
+}
+
+// Int64 adds the field key with i as a int64 to the logger context.
+func (c Context) Int64(key string, i int64) Context {
+	c.l.context = enc.AppendInt64(enc.AppendKey(c.l.context, key), i)
+	return c
+}
+
+// Ints64 adds the field key with i as a []int64 to the logger context.
+func (c Context) Ints64(key string, i []int64) Context {
+	c.l.context = enc.AppendInts64(enc.AppendKey(c.l.context, key), i)
+	return c
+}
+
+// Uint adds the field key with i as a uint to the logger context.
+func (c Context) Uint(key string, i uint) Context {
+	c.l.context = enc.AppendUint(enc.AppendKey(c.l.context, key), i)
+	return c
+}
+
+// Uints adds the field key with i as a []uint to the logger context.
+func (c Context) Uints(key string, i []uint) Context {
+	c.l.context = enc.AppendUints(enc.AppendKey(c.l.context, key), i)
+	return c
+}
+
+// Uint8 adds the field key with i as a uint8 to the logger context.
+func (c Context) Uint8(key string, i uint8) Context {
+	c.l.context = enc.AppendUint8(enc.AppendKey(c.l.context, key), i)
+	return c
+}
+
+// Uints8 adds the field key with i as a []uint8 to the logger context.
+func (c Context) Uints8(key string, i []uint8) Context {
+	c.l.context = enc.AppendUints8(enc.AppendKey(c.l.context, key), i)
+	return c
+}
+
+// Uint16 adds the field key with i as a uint16 to the logger context.
+func (c Context) Uint16(key string, i uint16) Context {
+	c.l.context = enc.AppendUint16(enc.AppendKey(c.l.context, key), i)
+	return c
+}
+
+// Uints16 adds the field key with i as a []uint16 to the logger context.
+func (c Context) Uints16(key string, i []uint16) Context {
+	c.l.context = enc.AppendUints16(enc.AppendKey(c.l.context, key), i)
+	return c
+}
+
+// Uint32 adds the field key with i as a uint32 to the logger context.
+func (c Context) Uint32(key string, i uint32) Context {
+	c.l.context = enc.AppendUint32(enc.AppendKey(c.l.context, key), i)
+	return c
+}
+
+// Uints32 adds the field key with i as a []uint32 to the logger context.
+func (c Context) Uints32(key string, i []uint32) Context {
+	c.l.context = enc.AppendUints32(enc.AppendKey(c.l.context, key), i)
+	return c
+}
+
+// Uint64 adds the field key with i as a uint64 to the logger context.
+func (c Context) Uint64(key string, i uint64) Context {
+	c.l.context = enc.AppendUint64(enc.AppendKey(c.l.context, key), i)
+	return c
+}
+
+// Uints64 adds the field key with i as a []uint64 to the logger context.
+func (c Context) Uints64(key string, i []uint64) Context {
+	c.l.context = enc.AppendUints64(enc.AppendKey(c.l.context, key), i)
+	return c
+}
+
+// Float32 adds the field key with f as a float32 to the logger context.
+func (c Context) Float32(key string, f float32) Context {
+	c.l.context = enc.AppendFloat32(enc.AppendKey(c.l.context, key), f)
+	return c
+}
+
+// Floats32 adds the field key with f as a []float32 to the logger context.
+func (c Context) Floats32(key string, f []float32) Context {
+	c.l.context = enc.AppendFloats32(enc.AppendKey(c.l.context, key), f)
+	return c
+}
+
+// Float64 adds the field key with f as a float64 to the logger context.
+func (c Context) Float64(key string, f float64) Context {
+	c.l.context = enc.AppendFloat64(enc.AppendKey(c.l.context, key), f)
+	return c
+}
+
+// Floats64 adds the field key with f as a []float64 to the logger context.
+func (c Context) Floats64(key string, f []float64) Context {
+	c.l.context = enc.AppendFloats64(enc.AppendKey(c.l.context, key), f)
+	return c
+}
+
+type timestampHook struct{}
+
+func (ts timestampHook) Run(e *Event, level Level, msg string) {
+	e.Timestamp()
+}
+
+var th = timestampHook{}
+
+// Timestamp adds the current local time as UNIX timestamp to the logger context with the "time" key.
+// To customize the key name, change zerolog.TimestampFieldName.
+//
+// NOTE: It won't dedupe the "time" key if the *Context has one already.
+func (c Context) Timestamp() Context {
+	c.l = c.l.Hook(th)
+	return c
+}
+
+// Time adds the field key with t formated as string using zerolog.TimeFieldFormat.
+func (c Context) Time(key string, t time.Time) Context {
+	c.l.context = enc.AppendTime(enc.AppendKey(c.l.context, key), t, TimeFieldFormat)
+	return c
+}
+
+// Times adds the field key with t formated as string using zerolog.TimeFieldFormat.
+func (c Context) Times(key string, t []time.Time) Context {
+	c.l.context = enc.AppendTimes(enc.AppendKey(c.l.context, key), t, TimeFieldFormat)
+	return c
+}
+
+// Dur adds the fields key with d divided by unit and stored as a float.
+func (c Context) Dur(key string, d time.Duration) Context {
+	c.l.context = enc.AppendDuration(enc.AppendKey(c.l.context, key), d, DurationFieldUnit, DurationFieldInteger)
+	return c
+}
+
+// Durs adds the fields key with d divided by unit and stored as a float.
+func (c Context) Durs(key string, d []time.Duration) Context {
+	c.l.context = enc.AppendDurations(enc.AppendKey(c.l.context, key), d, DurationFieldUnit, DurationFieldInteger)
+	return c
+}
+
+// Interface adds the field key with obj marshaled using reflection.
+func (c Context) Interface(key string, i interface{}) Context {
+	c.l.context = enc.AppendInterface(enc.AppendKey(c.l.context, key), i)
+	return c
+}
+
+type callerHook struct {
+	callerSkipFrameCount int
+}
+
+func newCallerHook(skipFrameCount int) callerHook {
+	return callerHook{callerSkipFrameCount: skipFrameCount}
+}
+
+func (ch callerHook) Run(e *Event, level Level, msg string) {
+	switch ch.callerSkipFrameCount {
+	case useGlobalSkipFrameCount:
+		// Extra frames to skip (added by hook infra).
+		e.caller(CallerSkipFrameCount + contextCallerSkipFrameCount)
+	default:
+		// Extra frames to skip (added by hook infra).
+		e.caller(ch.callerSkipFrameCount + contextCallerSkipFrameCount)
+	}
+}
+
+// useGlobalSkipFrameCount acts as a flag to informat callerHook.Run
+// to use the global CallerSkipFrameCount.
+const useGlobalSkipFrameCount = math.MinInt32
+
+// ch is the default caller hook using the global CallerSkipFrameCount.
+var ch = newCallerHook(useGlobalSkipFrameCount)
+
+// Caller adds the file:line of the caller with the zerolog.CallerFieldName key.
+func (c Context) Caller() Context {
+	c.l = c.l.Hook(ch)
+	return c
+}
+
+// CallerWithSkipFrameCount adds the file:line of the caller with the zerolog.CallerFieldName key.
+// The specified skipFrameCount int will override the global CallerSkipFrameCount for this context's respective logger.
+// If set to -1 the global CallerSkipFrameCount will be used.
+func (c Context) CallerWithSkipFrameCount(skipFrameCount int) Context {
+	c.l = c.l.Hook(newCallerHook(skipFrameCount))
+	return c
+}
+
+// Stack enables stack trace printing for the error passed to Err().
+func (c Context) Stack() Context {
+	c.l.stack = true
+	return c
+}
+
+// IPAddr adds IPv4 or IPv6 Address to the context
+func (c Context) IPAddr(key string, ip net.IP) Context {
+	c.l.context = enc.AppendIPAddr(enc.AppendKey(c.l.context, key), ip)
+	return c
+}
+
+// IPPrefix adds IPv4 or IPv6 Prefix (address and mask) to the context
+func (c Context) IPPrefix(key string, pfx net.IPNet) Context {
+	c.l.context = enc.AppendIPPrefix(enc.AppendKey(c.l.context, key), pfx)
+	return c
+}
+
+// MACAddr adds MAC address to the context
+func (c Context) MACAddr(key string, ha net.HardwareAddr) Context {
+	c.l.context = enc.AppendMACAddr(enc.AppendKey(c.l.context, key), ha)
+	return c
+}

vendor/github.com/rs/zerolog/ctx.go

@@ -0,0 +1,51 @@
+package zerolog
+
+import (
+	"context"
+)
+
+var disabledLogger *Logger
+
+func init() {
+	SetGlobalLevel(TraceLevel)
+	l := Nop()
+	disabledLogger = &l
+}
+
+type ctxKey struct{}
+
+// WithContext returns a copy of ctx with l associated. If an instance of Logger
+// is already in the context, the context is not updated.
+//
+// For instance, to add a field to an existing logger in the context, use this
+// notation:
+//
+//     ctx := r.Context()
+//     l := zerolog.Ctx(ctx)
+//     l.UpdateContext(func(c Context) Context {
+//         return c.Str("bar", "baz")
+//     })
+func (l *Logger) WithContext(ctx context.Context) context.Context {
+	if lp, ok := ctx.Value(ctxKey{}).(*Logger); ok {
+		if lp == l {
+			// Do not store same logger.
+			return ctx
+		}
+	} else if l.level == Disabled {
+		// Do not store disabled logger.
+		return ctx
+	}
+	return context.WithValue(ctx, ctxKey{}, l)
+}
+
+// Ctx returns the Logger associated with the ctx. If no logger
+// is associated, DefaultContextLogger is returned, unless DefaultContextLogger
+// is nil, in which case a disabled logger is returned.
+func Ctx(ctx context.Context) *Logger {
+	if l, ok := ctx.Value(ctxKey{}).(*Logger); ok {
+		return l
+	} else if l = DefaultContextLogger; l != nil {
+		return l
+	}
+	return disabledLogger
+}

vendor/github.com/rs/zerolog/encoder.go

@@ -0,0 +1,56 @@
+package zerolog
+
+import (
+	"net"
+	"time"
+)
+
+type encoder interface {
+	AppendArrayDelim(dst []byte) []byte
+	AppendArrayEnd(dst []byte) []byte
+	AppendArrayStart(dst []byte) []byte
+	AppendBeginMarker(dst []byte) []byte
+	AppendBool(dst []byte, val bool) []byte
+	AppendBools(dst []byte, vals []bool) []byte
+	AppendBytes(dst, s []byte) []byte
+	AppendDuration(dst []byte, d time.Duration, unit time.Duration, useInt bool) []byte
+	AppendDurations(dst []byte, vals []time.Duration, unit time.Duration, useInt bool) []byte
+	AppendEndMarker(dst []byte) []byte
+	AppendFloat32(dst []byte, val float32) []byte
+	AppendFloat64(dst []byte, val float64) []byte
+	AppendFloats32(dst []byte, vals []float32) []byte
+	AppendFloats64(dst []byte, vals []float64) []byte
+	AppendHex(dst, s []byte) []byte
+	AppendIPAddr(dst []byte, ip net.IP) []byte
+	AppendIPPrefix(dst []byte, pfx net.IPNet) []byte
+	AppendInt(dst []byte, val int) []byte
+	AppendInt16(dst []byte, val int16) []byte
+	AppendInt32(dst []byte, val int32) []byte
+	AppendInt64(dst []byte, val int64) []byte
+	AppendInt8(dst []byte, val int8) []byte
+	AppendInterface(dst []byte, i interface{}) []byte
+	AppendInts(dst []byte, vals []int) []byte
+	AppendInts16(dst []byte, vals []int16) []byte
+	AppendInts32(dst []byte, vals []int32) []byte
+	AppendInts64(dst []byte, vals []int64) []byte
+	AppendInts8(dst []byte, vals []int8) []byte
+	AppendKey(dst []byte, key string) []byte
+	AppendLineBreak(dst []byte) []byte
+	AppendMACAddr(dst []byte, ha net.HardwareAddr) []byte
+	AppendNil(dst []byte) []byte
+	AppendObjectData(dst []byte, o []byte) []byte
+	AppendString(dst []byte, s string) []byte
+	AppendStrings(dst []byte, vals []string) []byte
+	AppendTime(dst []byte, t time.Time, format string) []byte
+	AppendTimes(dst []byte, vals []time.Time, format string) []byte
+	AppendUint(dst []byte, val uint) []byte
+	AppendUint16(dst []byte, val uint16) []byte
+	AppendUint32(dst []byte, val uint32) []byte
+	AppendUint64(dst []byte, val uint64) []byte
+	AppendUint8(dst []byte, val uint8) []byte
+	AppendUints(dst []byte, vals []uint) []byte
+	AppendUints16(dst []byte, vals []uint16) []byte
+	AppendUints32(dst []byte, vals []uint32) []byte
+	AppendUints64(dst []byte, vals []uint64) []byte
+	AppendUints8(dst []byte, vals []uint8) []byte
+}

vendor/github.com/rs/zerolog/encoder_cbor.go

@@ -0,0 +1,42 @@
+// +build binary_log
+
+package zerolog
+
+// This file contains bindings to do binary encoding.
+
+import (
+	"github.com/rs/zerolog/internal/cbor"
+)
+
+var (
+	_ encoder = (*cbor.Encoder)(nil)
+
+	enc = cbor.Encoder{}
+)
+
+func init() {
+	// using closure to reflect the changes at runtime.
+	cbor.JSONMarshalFunc = func(v interface{}) ([]byte, error) {
+		return InterfaceMarshalFunc(v)
+	}
+}
+
+func appendJSON(dst []byte, j []byte) []byte {
+	return cbor.AppendEmbeddedJSON(dst, j)
+}
+
+// decodeIfBinaryToString - converts a binary formatted log msg to a
+// JSON formatted String Log message.
+func decodeIfBinaryToString(in []byte) string {
+	return cbor.DecodeIfBinaryToString(in)
+}
+
+func decodeObjectToStr(in []byte) string {
+	return cbor.DecodeObjectToStr(in)
+}
+
+// decodeIfBinaryToBytes - converts a binary formatted log msg to a
+// JSON formatted Bytes Log message.
+func decodeIfBinaryToBytes(in []byte) []byte {
+	return cbor.DecodeIfBinaryToBytes(in)
+}

vendor/github.com/rs/zerolog/encoder_json.go

@@ -0,0 +1,39 @@
+// +build !binary_log
+
+package zerolog
+
+// encoder_json.go file contains bindings to generate
+// JSON encoded byte stream.
+
+import (
+	"github.com/rs/zerolog/internal/json"
+)
+
+var (
+	_ encoder = (*json.Encoder)(nil)
+
+	enc = json.Encoder{}
+)
+
+func init() {
+	// using closure to reflect the changes at runtime.
+	json.JSONMarshalFunc = func(v interface{}) ([]byte, error) {
+		return InterfaceMarshalFunc(v)
+	}
+}
+
+func appendJSON(dst []byte, j []byte) []byte {
+	return append(dst, j...)
+}
+
+func decodeIfBinaryToString(in []byte) string {
+	return string(in)
+}
+
+func decodeObjectToStr(in []byte) string {
+	return string(in)
+}
+
+func decodeIfBinaryToBytes(in []byte) []byte {
+	return in
+}

vendor/github.com/rs/zerolog/event.go

@@ -0,0 +1,767 @@
+package zerolog
+
+import (
+	"fmt"
+	"net"
+	"os"
+	"runtime"
+	"sync"
+	"time"
+)
+
+var eventPool = &sync.Pool{
+	New: func() interface{} {
+		return &Event{
+			buf: make([]byte, 0, 500),
+		}
+	},
+}
+
+// Event represents a log event. It is instanced by one of the level method of
+// Logger and finalized by the Msg or Msgf method.
+type Event struct {
+	buf       []byte
+	w         LevelWriter
+	level     Level
+	done      func(msg string)
+	stack     bool   // enable error stack trace
+	ch        []Hook // hooks from context
+	skipFrame int    // The number of additional frames to skip when printing the caller.
+}
+
+func putEvent(e *Event) {
+	// Proper usage of a sync.Pool requires each entry to have approximately
+	// the same memory cost. To obtain this property when the stored type
+	// contains a variably-sized buffer, we add a hard limit on the maximum buffer
+	// to place back in the pool.
+	//
+	// See https://golang.org/issue/23199
+	const maxSize = 1 << 16 // 64KiB
+	if cap(e.buf) > maxSize {
+		return
+	}
+	eventPool.Put(e)
+}
+
+// LogObjectMarshaler provides a strongly-typed and encoding-agnostic interface
+// to be implemented by types used with Event/Context's Object methods.
+type LogObjectMarshaler interface {
+	MarshalZerologObject(e *Event)
+}
+
+// LogArrayMarshaler provides a strongly-typed and encoding-agnostic interface
+// to be implemented by types used with Event/Context's Array methods.
+type LogArrayMarshaler interface {
+	MarshalZerologArray(a *Array)
+}
+
+func newEvent(w LevelWriter, level Level) *Event {
+	e := eventPool.Get().(*Event)
+	e.buf = e.buf[:0]
+	e.ch = nil
+	e.buf = enc.AppendBeginMarker(e.buf)
+	e.w = w
+	e.level = level
+	e.stack = false
+	e.skipFrame = 0
+	return e
+}
+
+func (e *Event) write() (err error) {
+	if e == nil {
+		return nil
+	}
+	if e.level != Disabled {
+		e.buf = enc.AppendEndMarker(e.buf)
+		e.buf = enc.AppendLineBreak(e.buf)
+		if e.w != nil {
+			_, err = e.w.WriteLevel(e.level, e.buf)
+		}
+	}
+	putEvent(e)
+	return
+}
+
+// Enabled return false if the *Event is going to be filtered out by
+// log level or sampling.
+func (e *Event) Enabled() bool {
+	return e != nil && e.level != Disabled
+}
+
+// Discard disables the event so Msg(f) won't print it.
+func (e *Event) Discard() *Event {
+	if e == nil {
+		return e
+	}
+	e.level = Disabled
+	return nil
+}
+
+// Msg sends the *Event with msg added as the message field if not empty.
+//
+// NOTICE: once this method is called, the *Event should be disposed.
+// Calling Msg twice can have unexpected result.
+func (e *Event) Msg(msg string) {
+	if e == nil {
+		return
+	}
+	e.msg(msg)
+}
+
+// Send is equivalent to calling Msg("").
+//
+// NOTICE: once this method is called, the *Event should be disposed.
+func (e *Event) Send() {
+	if e == nil {
+		return
+	}
+	e.msg("")
+}
+
+// Msgf sends the event with formatted msg added as the message field if not empty.
+//
+// NOTICE: once this method is called, the *Event should be disposed.
+// Calling Msgf twice can have unexpected result.
+func (e *Event) Msgf(format string, v ...interface{}) {
+	if e == nil {
+		return
+	}
+	e.msg(fmt.Sprintf(format, v...))
+}
+
+func (e *Event) msg(msg string) {
+	for _, hook := range e.ch {
+		hook.Run(e, e.level, msg)
+	}
+	if msg != "" {
+		e.buf = enc.AppendString(enc.AppendKey(e.buf, MessageFieldName), msg)
+	}
+	if e.done != nil {
+		defer e.done(msg)
+	}
+	if err := e.write(); err != nil {
+		if ErrorHandler != nil {
+			ErrorHandler(err)
+		} else {
+			fmt.Fprintf(os.Stderr, "zerolog: could not write event: %v\n", err)
+		}
+	}
+}
+
+// Fields is a helper function to use a map or slice to set fields using type assertion.
+// Only map[string]interface{} and []interface{} are accepted. []interface{} must
+// alternate string keys and arbitrary values, and extraneous ones are ignored.
+func (e *Event) Fields(fields interface{}) *Event {
+	if e == nil {
+		return e
+	}
+	e.buf = appendFields(e.buf, fields)
+	return e
+}
+
+// Dict adds the field key with a dict to the event context.
+// Use zerolog.Dict() to create the dictionary.
+func (e *Event) Dict(key string, dict *Event) *Event {
+	if e == nil {
+		return e
+	}
+	dict.buf = enc.AppendEndMarker(dict.buf)
+	e.buf = append(enc.AppendKey(e.buf, key), dict.buf...)
+	putEvent(dict)
+	return e
+}
+
+// Dict creates an Event to be used with the *Event.Dict method.
+// Call usual field methods like Str, Int etc to add fields to this
+// event and give it as argument the *Event.Dict method.
+func Dict() *Event {
+	return newEvent(nil, 0)
+}
+
+// Array adds the field key with an array to the event context.
+// Use zerolog.Arr() to create the array or pass a type that
+// implement the LogArrayMarshaler interface.
+func (e *Event) Array(key string, arr LogArrayMarshaler) *Event {
+	if e == nil {
+		return e
+	}
+	e.buf = enc.AppendKey(e.buf, key)
+	var a *Array
+	if aa, ok := arr.(*Array); ok {
+		a = aa
+	} else {
+		a = Arr()
+		arr.MarshalZerologArray(a)
+	}
+	e.buf = a.write(e.buf)
+	return e
+}
+
+func (e *Event) appendObject(obj LogObjectMarshaler) {
+	e.buf = enc.AppendBeginMarker(e.buf)
+	obj.MarshalZerologObject(e)
+	e.buf = enc.AppendEndMarker(e.buf)
+}
+
+// Object marshals an object that implement the LogObjectMarshaler interface.
+func (e *Event) Object(key string, obj LogObjectMarshaler) *Event {
+	if e == nil {
+		return e
+	}
+	e.buf = enc.AppendKey(e.buf, key)
+	if obj == nil {
+		e.buf = enc.AppendNil(e.buf)
+
+		return e
+	}
+
+	e.appendObject(obj)
+	return e
+}
+
+// Func allows an anonymous func to run only if the event is enabled.
+func (e *Event) Func(f func(e *Event)) *Event {
+	if e != nil && e.Enabled() {
+		f(e)
+	}
+	return e
+}
+
+// EmbedObject marshals an object that implement the LogObjectMarshaler interface.
+func (e *Event) EmbedObject(obj LogObjectMarshaler) *Event {
+	if e == nil {
+		return e
+	}
+	if obj == nil {
+		return e
+	}
+	obj.MarshalZerologObject(e)
+	return e
+}
+
+// Str adds the field key with val as a string to the *Event context.
+func (e *Event) Str(key, val string) *Event {
+	if e == nil {
+		return e
+	}
+	e.buf = enc.AppendString(enc.AppendKey(e.buf, key), val)
+	return e
+}
+
+// Strs adds the field key with vals as a []string to the *Event context.
+func (e *Event) Strs(key string, vals []string) *Event {
+	if e == nil {
+		return e
+	}
+	e.buf = enc.AppendStrings(enc.AppendKey(e.buf, key), vals)
+	return e
+}
+
+// Stringer adds the field key with val.String() (or null if val is nil) to the *Event context.
+func (e *Event) Stringer(key string, val fmt.Stringer) *Event {
+	if e == nil {
+		return e
+	}
+
+	if val != nil {
+		e.buf = enc.AppendString(enc.AppendKey(e.buf, key), val.String())
+		return e
+	}
+
+	e.buf = enc.AppendInterface(enc.AppendKey(e.buf, key), nil)
+	return e
+}
+
+// Bytes adds the field key with val as a string to the *Event context.
+//
+// Runes outside of normal ASCII ranges will be hex-encoded in the resulting
+// JSON.
+func (e *Event) Bytes(key string, val []byte) *Event {
+	if e == nil {
+		return e
+	}
+	e.buf = enc.AppendBytes(enc.AppendKey(e.buf, key), val)
+	return e
+}
+
+// Hex adds the field key with val as a hex string to the *Event context.
+func (e *Event) Hex(key string, val []byte) *Event {
+	if e == nil {
+		return e
+	}
+	e.buf = enc.AppendHex(enc.AppendKey(e.buf, key), val)
+	return e
+}
+
+// RawJSON adds already encoded JSON to the log line under key.
+//
+// No sanity check is performed on b; it must not contain carriage returns and
+// be valid JSON.
+func (e *Event) RawJSON(key string, b []byte) *Event {
+	if e == nil {
+		return e
+	}
+	e.buf = appendJSON(enc.AppendKey(e.buf, key), b)
+	return e
+}
+
+// AnErr adds the field key with serialized err to the *Event context.
+// If err is nil, no field is added.
+func (e *Event) AnErr(key string, err error) *Event {
+	if e == nil {
+		return e
+	}
+	switch m := ErrorMarshalFunc(err).(type) {
+	case nil:
+		return e
+	case LogObjectMarshaler:
+		return e.Object(key, m)
+	case error:
+		if m == nil || isNilValue(m) {
+			return e
+		} else {
+			return e.Str(key, m.Error())
+		}
+	case string:
+		return e.Str(key, m)
+	default:
+		return e.Interface(key, m)
+	}
+}
+
+// Errs adds the field key with errs as an array of serialized errors to the
+// *Event context.
+func (e *Event) Errs(key string, errs []error) *Event {
+	if e == nil {
+		return e
+	}
+	arr := Arr()
+	for _, err := range errs {
+		switch m := ErrorMarshalFunc(err).(type) {
+		case LogObjectMarshaler:
+			arr = arr.Object(m)
+		case error:
+			arr = arr.Err(m)
+		case string:
+			arr = arr.Str(m)
+		default:
+			arr = arr.Interface(m)
+		}
+	}
+
+	return e.Array(key, arr)
+}
+
+// Err adds the field "error" with serialized err to the *Event context.
+// If err is nil, no field is added.
+//
+// To customize the key name, change zerolog.ErrorFieldName.
+//
+// If Stack() has been called before and zerolog.ErrorStackMarshaler is defined,
+// the err is passed to ErrorStackMarshaler and the result is appended to the
+// zerolog.ErrorStackFieldName.
+func (e *Event) Err(err error) *Event {
+	if e == nil {
+		return e
+	}
+	if e.stack && ErrorStackMarshaler != nil {
+		switch m := ErrorStackMarshaler(err).(type) {
+		case nil:
+		case LogObjectMarshaler:
+			e.Object(ErrorStackFieldName, m)
+		case error:
+			if m != nil && !isNilValue(m) {
+				e.Str(ErrorStackFieldName, m.Error())
+			}
+		case string:
+			e.Str(ErrorStackFieldName, m)
+		default:
+			e.Interface(ErrorStackFieldName, m)
+		}
+	}
+	return e.AnErr(ErrorFieldName, err)
+}
+
+// Stack enables stack trace printing for the error passed to Err().
+//
+// ErrorStackMarshaler must be set for this method to do something.
+func (e *Event) Stack() *Event {
+	if e != nil {
+		e.stack = true
+	}
+	return e
+}
+
+// Bool adds the field key with val as a bool to the *Event context.
+func (e *Event) Bool(key string, b bool) *Event {
+	if e == nil {
+		return e
+	}
+	e.buf = enc.AppendBool(enc.AppendKey(e.buf, key), b)
+	return e
+}
+
+// Bools adds the field key with val as a []bool to the *Event context.
+func (e *Event) Bools(key string, b []bool) *Event {
+	if e == nil {
+		return e
+	}
+	e.buf = enc.AppendBools(enc.AppendKey(e.buf, key), b)
+	return e
+}
+
+// Int adds the field key with i as a int to the *Event context.
+func (e *Event) Int(key string, i int) *Event {
+	if e == nil {
+		return e
+	}
+	e.buf = enc.AppendInt(enc.AppendKey(e.buf, key), i)
+	return e
+}
+
+// Ints adds the field key with i as a []int to the *Event context.
+func (e *Event) Ints(key string, i []int) *Event {
+	if e == nil {
+		return e
+	}
+	e.buf = enc.AppendInts(enc.AppendKey(e.buf, key), i)
+	return e
+}
+
+// Int8 adds the field key with i as a int8 to the *Event context.
+func (e *Event) Int8(key string, i int8) *Event {
+	if e == nil {
+		return e
+	}
+	e.buf = enc.AppendInt8(enc.AppendKey(e.buf, key), i)
+	return e
+}
+
+// Ints8 adds the field key with i as a []int8 to the *Event context.
+func (e *Event) Ints8(key string, i []int8) *Event {
+	if e == nil {
+		return e
+	}
+	e.buf = enc.AppendInts8(enc.AppendKey(e.buf, key), i)
+	return e
+}
+
+// Int16 adds the field key with i as a int16 to the *Event context.
+func (e *Event) Int16(key string, i int16) *Event {
+	if e == nil {
+		return e
+	}
+	e.buf = enc.AppendInt16(enc.AppendKey(e.buf, key), i)
+	return e
+}
+
+// Ints16 adds the field key with i as a []int16 to the *Event context.
+func (e *Event) Ints16(key string, i []int16) *Event {
+	if e == nil {
+		return e
+	}
+	e.buf = enc.AppendInts16(enc.AppendKey(e.buf, key), i)
+	return e
+}
+
+// Int32 adds the field key with i as a int32 to the *Event context.
+func (e *Event) Int32(key string, i int32) *Event {
+	if e == nil {
+		return e
+	}
+	e.buf = enc.AppendInt32(enc.AppendKey(e.buf, key), i)
+	return e
+}
+
+// Ints32 adds the field key with i as a []int32 to the *Event context.
+func (e *Event) Ints32(key string, i []int32) *Event {
+	if e == nil {
+		return e
+	}
+	e.buf = enc.AppendInts32(enc.AppendKey(e.buf, key), i)
+	return e
+}
+
+// Int64 adds the field key with i as a int64 to the *Event context.
+func (e *Event) Int64(key string, i int64) *Event {
+	if e == nil {
+		return e
+	}
+	e.buf = enc.AppendInt64(enc.AppendKey(e.buf, key), i)
+	return e
+}
+
+// Ints64 adds the field key with i as a []int64 to the *Event context.
+func (e *Event) Ints64(key string, i []int64) *Event {
+	if e == nil {
+		return e
+	}
+	e.buf = enc.AppendInts64(enc.AppendKey(e.buf, key), i)
+	return e
+}
+
+// Uint adds the field key with i as a uint to the *Event context.
+func (e *Event) Uint(key string, i uint) *Event {
+	if e == nil {
+		return e
+	}
+	e.buf = enc.AppendUint(enc.AppendKey(e.buf, key), i)
+	return e
+}
+
+// Uints adds the field key with i as a []int to the *Event context.
+func (e *Event) Uints(key string, i []uint) *Event {
+	if e == nil {
+		return e
+	}
+	e.buf = enc.AppendUints(enc.AppendKey(e.buf, key), i)
+	return e
+}
+
+// Uint8 adds the field key with i as a uint8 to the *Event context.
+func (e *Event) Uint8(key string, i uint8) *Event {
+	if e == nil {
+		return e
+	}
+	e.buf = enc.AppendUint8(enc.AppendKey(e.buf, key), i)
+	return e
+}
+
+// Uints8 adds the field key with i as a []int8 to the *Event context.
+func (e *Event) Uints8(key string, i []uint8) *Event {
+	if e == nil {
+		return e
+	}
+	e.buf = enc.AppendUints8(enc.AppendKey(e.buf, key), i)
+	return e
+}
+
+// Uint16 adds the field key with i as a uint16 to the *Event context.
+func (e *Event) Uint16(key string, i uint16) *Event {
+	if e == nil {
+		return e
+	}
+	e.buf = enc.AppendUint16(enc.AppendKey(e.buf, key), i)
+	return e
+}
+
+// Uints16 adds the field key with i as a []int16 to the *Event context.
+func (e *Event) Uints16(key string, i []uint16) *Event {
+	if e == nil {
+		return e
+	}
+	e.buf = enc.AppendUints16(enc.AppendKey(e.buf, key), i)
+	return e
+}
+
+// Uint32 adds the field key with i as a uint32 to the *Event context.
+func (e *Event) Uint32(key string, i uint32) *Event {
+	if e == nil {
+		return e
+	}
+	e.buf = enc.AppendUint32(enc.AppendKey(e.buf, key), i)
+	return e
+}
+
+// Uints32 adds the field key with i as a []int32 to the *Event context.
+func (e *Event) Uints32(key string, i []uint32) *Event {
+	if e == nil {
+		return e
+	}
+	e.buf = enc.AppendUints32(enc.AppendKey(e.buf, key), i)
+	return e
+}
+
+// Uint64 adds the field key with i as a uint64 to the *Event context.
+func (e *Event) Uint64(key string, i uint64) *Event {
+	if e == nil {
+		return e
+	}
+	e.buf = enc.AppendUint64(enc.AppendKey(e.buf, key), i)
+	return e
+}
+
+// Uints64 adds the field key with i as a []int64 to the *Event context.
+func (e *Event) Uints64(key string, i []uint64) *Event {
+	if e == nil {
+		return e
+	}
+	e.buf = enc.AppendUints64(enc.AppendKey(e.buf, key), i)
+	return e
+}
+
+// Float32 adds the field key with f as a float32 to the *Event context.
+func (e *Event) Float32(key string, f float32) *Event {
+	if e == nil {
+		return e
+	}
+	e.buf = enc.AppendFloat32(enc.AppendKey(e.buf, key), f)
+	return e
+}
+
+// Floats32 adds the field key with f as a []float32 to the *Event context.
+func (e *Event) Floats32(key string, f []float32) *Event {
+	if e == nil {
+		return e
+	}
+	e.buf = enc.AppendFloats32(enc.AppendKey(e.buf, key), f)
+	return e
+}
+
+// Float64 adds the field key with f as a float64 to the *Event context.
+func (e *Event) Float64(key string, f float64) *Event {
+	if e == nil {
+		return e
+	}
+	e.buf = enc.AppendFloat64(enc.AppendKey(e.buf, key), f)
+	return e
+}
+
+// Floats64 adds the field key with f as a []float64 to the *Event context.
+func (e *Event) Floats64(key string, f []float64) *Event {
+	if e == nil {
+		return e
+	}
+	e.buf = enc.AppendFloats64(enc.AppendKey(e.buf, key), f)
+	return e
+}
+
+// Timestamp adds the current local time as UNIX timestamp to the *Event context with the "time" key.
+// To customize the key name, change zerolog.TimestampFieldName.
+//
+// NOTE: It won't dedupe the "time" key if the *Event (or *Context) has one
+// already.
+func (e *Event) Timestamp() *Event {
+	if e == nil {
+		return e
+	}
+	e.buf = enc.AppendTime(enc.AppendKey(e.buf, TimestampFieldName), TimestampFunc(), TimeFieldFormat)
+	return e
+}
+
+// Time adds the field key with t formated as string using zerolog.TimeFieldFormat.
+func (e *Event) Time(key string, t time.Time) *Event {
+	if e == nil {
+		return e
+	}
+	e.buf = enc.AppendTime(enc.AppendKey(e.buf, key), t, TimeFieldFormat)
+	return e
+}
+
+// Times adds the field key with t formated as string using zerolog.TimeFieldFormat.
+func (e *Event) Times(key string, t []time.Time) *Event {
+	if e == nil {
+		return e
+	}
+	e.buf = enc.AppendTimes(enc.AppendKey(e.buf, key), t, TimeFieldFormat)
+	return e
+}
+
+// Dur adds the field key with duration d stored as zerolog.DurationFieldUnit.
+// If zerolog.DurationFieldInteger is true, durations are rendered as integer
+// instead of float.
+func (e *Event) Dur(key string, d time.Duration) *Event {
+	if e == nil {
+		return e
+	}
+	e.buf = enc.AppendDuration(enc.AppendKey(e.buf, key), d, DurationFieldUnit, DurationFieldInteger)
+	return e
+}
+
+// Durs adds the field key with duration d stored as zerolog.DurationFieldUnit.
+// If zerolog.DurationFieldInteger is true, durations are rendered as integer
+// instead of float.
+func (e *Event) Durs(key string, d []time.Duration) *Event {
+	if e == nil {
+		return e
+	}
+	e.buf = enc.AppendDurations(enc.AppendKey(e.buf, key), d, DurationFieldUnit, DurationFieldInteger)
+	return e
+}
+
+// TimeDiff adds the field key with positive duration between time t and start.
+// If time t is not greater than start, duration will be 0.
+// Duration format follows the same principle as Dur().
+func (e *Event) TimeDiff(key string, t time.Time, start time.Time) *Event {
+	if e == nil {
+		return e
+	}
+	var d time.Duration
+	if t.After(start) {
+		d = t.Sub(start)
+	}
+	e.buf = enc.AppendDuration(enc.AppendKey(e.buf, key), d, DurationFieldUnit, DurationFieldInteger)
+	return e
+}
+
+// Interface adds the field key with i marshaled using reflection.
+func (e *Event) Interface(key string, i interface{}) *Event {
+	if e == nil {
+		return e
+	}
+	if obj, ok := i.(LogObjectMarshaler); ok {
+		return e.Object(key, obj)
+	}
+	e.buf = enc.AppendInterface(enc.AppendKey(e.buf, key), i)
+	return e
+}
+
+// CallerSkipFrame instructs any future Caller calls to skip the specified number of frames.
+// This includes those added via hooks from the context.
+func (e *Event) CallerSkipFrame(skip int) *Event {
+	if e == nil {
+		return e
+	}
+	e.skipFrame += skip
+	return e
+}
+
+// Caller adds the file:line of the caller with the zerolog.CallerFieldName key.
+// The argument skip is the number of stack frames to ascend
+// Skip If not passed, use the global variable CallerSkipFrameCount
+func (e *Event) Caller(skip ...int) *Event {
+	sk := CallerSkipFrameCount
+	if len(skip) > 0 {
+		sk = skip[0] + CallerSkipFrameCount
+	}
+	return e.caller(sk)
+}
+
+func (e *Event) caller(skip int) *Event {
+	if e == nil {
+		return e
+	}
+	_, file, line, ok := runtime.Caller(skip + e.skipFrame)
+	if !ok {
+		return e
+	}
+	e.buf = enc.AppendString(enc.AppendKey(e.buf, CallerFieldName), CallerMarshalFunc(file, line))
+	return e
+}
+
+// IPAddr adds IPv4 or IPv6 Address to the event
+func (e *Event) IPAddr(key string, ip net.IP) *Event {
+	if e == nil {
+		return e
+	}
+	e.buf = enc.AppendIPAddr(enc.AppendKey(e.buf, key), ip)
+	return e
+}
+
+// IPPrefix adds IPv4 or IPv6 Prefix (address and mask) to the event
+func (e *Event) IPPrefix(key string, pfx net.IPNet) *Event {
+	if e == nil {
+		return e
+	}
+	e.buf = enc.AppendIPPrefix(enc.AppendKey(e.buf, key), pfx)
+	return e
+}
+
+// MACAddr adds MAC address to the event
+func (e *Event) MACAddr(key string, ha net.HardwareAddr) *Event {
+	if e == nil {
+		return e
+	}
+	e.buf = enc.AppendMACAddr(enc.AppendKey(e.buf, key), ha)
+	return e
+}

vendor/github.com/rs/zerolog/fields.go

@@ -0,0 +1,277 @@
+package zerolog
+
+import (
+	"encoding/json"
+	"net"
+	"sort"
+	"time"
+	"unsafe"
+)
+
+func isNilValue(i interface{}) bool {
+	return (*[2]uintptr)(unsafe.Pointer(&i))[1] == 0
+}
+
+func appendFields(dst []byte, fields interface{}) []byte {
+	switch fields := fields.(type) {
+	case []interface{}:
+		if n := len(fields); n&0x1 == 1 { // odd number
+			fields = fields[:n-1]
+		}
+		dst = appendFieldList(dst, fields)
+	case map[string]interface{}:
+		keys := make([]string, 0, len(fields))
+		for key := range fields {
+			keys = append(keys, key)
+		}
+		sort.Strings(keys)
+		kv := make([]interface{}, 2)
+		for _, key := range keys {
+			kv[0], kv[1] = key, fields[key]
+			dst = appendFieldList(dst, kv)
+		}
+	}
+	return dst
+}
+
+func appendFieldList(dst []byte, kvList []interface{}) []byte {
+	for i, n := 0, len(kvList); i < n; i += 2 {
+		key, val := kvList[i], kvList[i+1]
+		if key, ok := key.(string); ok {
+			dst = enc.AppendKey(dst, key)
+		} else {
+			continue
+		}
+		if val, ok := val.(LogObjectMarshaler); ok {
+			e := newEvent(nil, 0)
+			e.buf = e.buf[:0]
+			e.appendObject(val)
+			dst = append(dst, e.buf...)
+			putEvent(e)
+			continue
+		}
+		switch val := val.(type) {
+		case string:
+			dst = enc.AppendString(dst, val)
+		case []byte:
+			dst = enc.AppendBytes(dst, val)
+		case error:
+			switch m := ErrorMarshalFunc(val).(type) {
+			case LogObjectMarshaler:
+				e := newEvent(nil, 0)
+				e.buf = e.buf[:0]
+				e.appendObject(m)
+				dst = append(dst, e.buf...)
+				putEvent(e)
+			case error:
+				if m == nil || isNilValue(m) {
+					dst = enc.AppendNil(dst)
+				} else {
+					dst = enc.AppendString(dst, m.Error())
+				}
+			case string:
+				dst = enc.AppendString(dst, m)
+			default:
+				dst = enc.AppendInterface(dst, m)
+			}
+		case []error:
+			dst = enc.AppendArrayStart(dst)
+			for i, err := range val {
+				switch m := ErrorMarshalFunc(err).(type) {
+				case LogObjectMarshaler:
+					e := newEvent(nil, 0)
+					e.buf = e.buf[:0]
+					e.appendObject(m)
+					dst = append(dst, e.buf...)
+					putEvent(e)
+				case error:
+					if m == nil || isNilValue(m) {
+						dst = enc.AppendNil(dst)
+					} else {
+						dst = enc.AppendString(dst, m.Error())
+					}
+				case string:
+					dst = enc.AppendString(dst, m)
+				default:
+					dst = enc.AppendInterface(dst, m)
+				}
+
+				if i < (len(val) - 1) {
+					enc.AppendArrayDelim(dst)
+				}
+			}
+			dst = enc.AppendArrayEnd(dst)
+		case bool:
+			dst = enc.AppendBool(dst, val)
+		case int:
+			dst = enc.AppendInt(dst, val)
+		case int8:
+			dst = enc.AppendInt8(dst, val)
+		case int16:
+			dst = enc.AppendInt16(dst, val)
+		case int32:
+			dst = enc.AppendInt32(dst, val)
+		case int64:
+			dst = enc.AppendInt64(dst, val)
+		case uint:
+			dst = enc.AppendUint(dst, val)
+		case uint8:
+			dst = enc.AppendUint8(dst, val)
+		case uint16:
+			dst = enc.AppendUint16(dst, val)
+		case uint32:
+			dst = enc.AppendUint32(dst, val)
+		case uint64:
+			dst = enc.AppendUint64(dst, val)
+		case float32:
+			dst = enc.AppendFloat32(dst, val)
+		case float64:
+			dst = enc.AppendFloat64(dst, val)
+		case time.Time:
+			dst = enc.AppendTime(dst, val, TimeFieldFormat)
+		case time.Duration:
+			dst = enc.AppendDuration(dst, val, DurationFieldUnit, DurationFieldInteger)
+		case *string:
+			if val != nil {
+				dst = enc.AppendString(dst, *val)
+			} else {
+				dst = enc.AppendNil(dst)
+			}
+		case *bool:
+			if val != nil {
+				dst = enc.AppendBool(dst, *val)
+			} else {
+				dst = enc.AppendNil(dst)
+			}
+		case *int:
+			if val != nil {
+				dst = enc.AppendInt(dst, *val)
+			} else {
+				dst = enc.AppendNil(dst)
+			}
+		case *int8:
+			if val != nil {
+				dst = enc.AppendInt8(dst, *val)
+			} else {
+				dst = enc.AppendNil(dst)
+			}
+		case *int16:
+			if val != nil {
+				dst = enc.AppendInt16(dst, *val)
+			} else {
+				dst = enc.AppendNil(dst)
+			}
+		case *int32:
+			if val != nil {
+				dst = enc.AppendInt32(dst, *val)
+			} else {
+				dst = enc.AppendNil(dst)
+			}
+		case *int64:
+			if val != nil {
+				dst = enc.AppendInt64(dst, *val)
+			} else {
+				dst = enc.AppendNil(dst)
+			}
+		case *uint:
+			if val != nil {
+				dst = enc.AppendUint(dst, *val)
+			} else {
+				dst = enc.AppendNil(dst)
+			}
+		case *uint8:
+			if val != nil {
+				dst = enc.AppendUint8(dst, *val)
+			} else {
+				dst = enc.AppendNil(dst)
+			}
+		case *uint16:
+			if val != nil {
+				dst = enc.AppendUint16(dst, *val)
+			} else {
+				dst = enc.AppendNil(dst)
+			}
+		case *uint32:
+			if val != nil {
+				dst = enc.AppendUint32(dst, *val)
+			} else {
+				dst = enc.AppendNil(dst)
+			}
+		case *uint64:
+			if val != nil {
+				dst = enc.AppendUint64(dst, *val)
+			} else {
+				dst = enc.AppendNil(dst)
+			}
+		case *float32:
+			if val != nil {
+				dst = enc.AppendFloat32(dst, *val)
+			} else {
+				dst = enc.AppendNil(dst)
+			}
+		case *float64:
+			if val != nil {
+				dst = enc.AppendFloat64(dst, *val)
+			} else {
+				dst = enc.AppendNil(dst)
+			}
+		case *time.Time:
+			if val != nil {
+				dst = enc.AppendTime(dst, *val, TimeFieldFormat)
+			} else {
+				dst = enc.AppendNil(dst)
+			}
+		case *time.Duration:
+			if val != nil {
+				dst = enc.AppendDuration(dst, *val, DurationFieldUnit, DurationFieldInteger)
+			} else {
+				dst = enc.AppendNil(dst)
+			}
+		case []string:
+			dst = enc.AppendStrings(dst, val)
+		case []bool:
+			dst = enc.AppendBools(dst, val)
+		case []int:
+			dst = enc.AppendInts(dst, val)
+		case []int8:
+			dst = enc.AppendInts8(dst, val)
+		case []int16:
+			dst = enc.AppendInts16(dst, val)
+		case []int32:
+			dst = enc.AppendInts32(dst, val)
+		case []int64:
+			dst = enc.AppendInts64(dst, val)
+		case []uint:
+			dst = enc.AppendUints(dst, val)
+		// case []uint8:
+		// 	dst = enc.AppendUints8(dst, val)
+		case []uint16:
+			dst = enc.AppendUints16(dst, val)
+		case []uint32:
+			dst = enc.AppendUints32(dst, val)
+		case []uint64:
+			dst = enc.AppendUints64(dst, val)
+		case []float32:
+			dst = enc.AppendFloats32(dst, val)
+		case []float64:
+			dst = enc.AppendFloats64(dst, val)
+		case []time.Time:
+			dst = enc.AppendTimes(dst, val, TimeFieldFormat)
+		case []time.Duration:
+			dst = enc.AppendDurations(dst, val, DurationFieldUnit, DurationFieldInteger)
+		case nil:
+			dst = enc.AppendNil(dst)
+		case net.IP:
+			dst = enc.AppendIPAddr(dst, val)
+		case net.IPNet:
+			dst = enc.AppendIPPrefix(dst, val)
+		case net.HardwareAddr:
+			dst = enc.AppendMACAddr(dst, val)
+		case json.RawMessage:
+			dst = appendJSON(dst, val)
+		default:
+			dst = enc.AppendInterface(dst, val)
+		}
+	}
+	return dst
+}

vendor/github.com/rs/zerolog/globals.go

@@ -0,0 +1,138 @@
+package zerolog
+
+import (
+	"encoding/json"
+	"strconv"
+	"sync/atomic"
+	"time"
+)
+
+const (
+	// TimeFormatUnix defines a time format that makes time fields to be
+	// serialized as Unix timestamp integers.
+	TimeFormatUnix = ""
+
+	// TimeFormatUnixMs defines a time format that makes time fields to be
+	// serialized as Unix timestamp integers in milliseconds.
+	TimeFormatUnixMs = "UNIXMS"
+
+	// TimeFormatUnixMicro defines a time format that makes time fields to be
+	// serialized as Unix timestamp integers in microseconds.
+	TimeFormatUnixMicro = "UNIXMICRO"
+)
+
+var (
+	// TimestampFieldName is the field name used for the timestamp field.
+	TimestampFieldName = "time"
+
+	// LevelFieldName is the field name used for the level field.
+	LevelFieldName = "level"
+
+	// LevelTraceValue is the value used for the trace level field.
+	LevelTraceValue = "trace"
+	// LevelDebugValue is the value used for the debug level field.
+	LevelDebugValue = "debug"
+	// LevelInfoValue is the value used for the info level field.
+	LevelInfoValue = "info"
+	// LevelWarnValue is the value used for the warn level field.
+	LevelWarnValue = "warn"
+	// LevelErrorValue is the value used for the error level field.
+	LevelErrorValue = "error"
+	// LevelFatalValue is the value used for the fatal level field.
+	LevelFatalValue = "fatal"
+	// LevelPanicValue is the value used for the panic level field.
+	LevelPanicValue = "panic"
+
+	// LevelFieldMarshalFunc allows customization of global level field marshaling.
+	LevelFieldMarshalFunc = func(l Level) string {
+		return l.String()
+	}
+
+	// MessageFieldName is the field name used for the message field.
+	MessageFieldName = "message"
+
+	// ErrorFieldName is the field name used for error fields.
+	ErrorFieldName = "error"
+
+	// CallerFieldName is the field name used for caller field.
+	CallerFieldName = "caller"
+
+	// CallerSkipFrameCount is the number of stack frames to skip to find the caller.
+	CallerSkipFrameCount = 2
+
+	// CallerMarshalFunc allows customization of global caller marshaling
+	CallerMarshalFunc = func(file string, line int) string {
+		return file + ":" + strconv.Itoa(line)
+	}
+
+	// ErrorStackFieldName is the field name used for error stacks.
+	ErrorStackFieldName = "stack"
+
+	// ErrorStackMarshaler extract the stack from err if any.
+	ErrorStackMarshaler func(err error) interface{}
+
+	// ErrorMarshalFunc allows customization of global error marshaling
+	ErrorMarshalFunc = func(err error) interface{} {
+		return err
+	}
+
+	// InterfaceMarshalFunc allows customization of interface marshaling.
+	// Default: "encoding/json.Marshal"
+	InterfaceMarshalFunc = json.Marshal
+
+	// TimeFieldFormat defines the time format of the Time field type. If set to
+	// TimeFormatUnix, TimeFormatUnixMs or TimeFormatUnixMicro, the time is formatted as an UNIX
+	// timestamp as integer.
+	TimeFieldFormat = time.RFC3339
+
+	// TimestampFunc defines the function called to generate a timestamp.
+	TimestampFunc = time.Now
+
+	// DurationFieldUnit defines the unit for time.Duration type fields added
+	// using the Dur method.
+	DurationFieldUnit = time.Millisecond
+
+	// DurationFieldInteger renders Dur fields as integer instead of float if
+	// set to true.
+	DurationFieldInteger = false
+
+	// ErrorHandler is called whenever zerolog fails to write an event on its
+	// output. If not set, an error is printed on the stderr. This handler must
+	// be thread safe and non-blocking.
+	ErrorHandler func(err error)
+
+	// DefaultContextLogger is returned from Ctx() if there is no logger associated
+	// with the context.
+	DefaultContextLogger *Logger
+)
+
+var (
+	gLevel          = new(int32)
+	disableSampling = new(int32)
+)
+
+// SetGlobalLevel sets the global override for log level. If this
+// values is raised, all Loggers will use at least this value.
+//
+// To globally disable logs, set GlobalLevel to Disabled.
+func SetGlobalLevel(l Level) {
+	atomic.StoreInt32(gLevel, int32(l))
+}
+
+// GlobalLevel returns the current global log level
+func GlobalLevel() Level {
+	return Level(atomic.LoadInt32(gLevel))
+}
+
+// DisableSampling will disable sampling in all Loggers if true.
+func DisableSampling(v bool) {
+	var i int32
+	if v {
+		i = 1
+	}
+	atomic.StoreInt32(disableSampling, i)
+}
+
+func samplingDisabled() bool {
+	return atomic.LoadInt32(disableSampling) == 1
+}

vendor/github.com/rs/zerolog/go112.go

@@ -0,0 +1,7 @@
+// +build go1.12
+
+package zerolog
+
+// Since go 1.12, some auto generated init functions are hidden from
+// runtime.Caller.
+const contextCallerSkipFrameCount = 2