390 lines
11 KiB
JavaScript
390 lines
11 KiB
JavaScript
module.exports = Writer
|
|
|
|
var fs = require('graceful-fs')
|
|
var inherits = require('inherits')
|
|
var rimraf = require('rimraf')
|
|
var mkdir = require('mkdirp')
|
|
var path = require('path')
|
|
var umask = process.platform === 'win32' ? 0 : process.umask()
|
|
var getType = require('./get-type.js')
|
|
var Abstract = require('./abstract.js')
|
|
|
|
// Must do this *before* loading the child classes
|
|
inherits(Writer, Abstract)
|
|
|
|
Writer.dirmode = parseInt('0777', 8) & (~umask)
|
|
Writer.filemode = parseInt('0666', 8) & (~umask)
|
|
|
|
var DirWriter = require('./dir-writer.js')
|
|
var LinkWriter = require('./link-writer.js')
|
|
var FileWriter = require('./file-writer.js')
|
|
var ProxyWriter = require('./proxy-writer.js')
|
|
|
|
// props is the desired state. current is optionally the current stat,
|
|
// provided here so that subclasses can avoid statting the target
|
|
// more than necessary.
|
|
function Writer (props, current) {
|
|
var self = this
|
|
|
|
if (typeof props === 'string') {
|
|
props = { path: props }
|
|
}
|
|
|
|
// polymorphism.
|
|
// call fstream.Writer(dir) to get a DirWriter object, etc.
|
|
var type = getType(props)
|
|
var ClassType = Writer
|
|
|
|
switch (type) {
|
|
case 'Directory':
|
|
ClassType = DirWriter
|
|
break
|
|
case 'File':
|
|
ClassType = FileWriter
|
|
break
|
|
case 'Link':
|
|
case 'SymbolicLink':
|
|
ClassType = LinkWriter
|
|
break
|
|
case null:
|
|
default:
|
|
// Don't know yet what type to create, so we wrap in a proxy.
|
|
ClassType = ProxyWriter
|
|
break
|
|
}
|
|
|
|
if (!(self instanceof ClassType)) return new ClassType(props)
|
|
|
|
// now get down to business.
|
|
|
|
Abstract.call(self)
|
|
|
|
if (!props.path) self.error('Must provide a path', null, true)
|
|
|
|
// props is what we want to set.
|
|
// set some convenience properties as well.
|
|
self.type = props.type
|
|
self.props = props
|
|
self.depth = props.depth || 0
|
|
self.clobber = props.clobber === false ? props.clobber : true
|
|
self.parent = props.parent || null
|
|
self.root = props.root || (props.parent && props.parent.root) || self
|
|
|
|
self._path = self.path = path.resolve(props.path)
|
|
if (process.platform === 'win32') {
|
|
self.path = self._path = self.path.replace(/\?/g, '_')
|
|
if (self._path.length >= 260) {
|
|
self._swallowErrors = true
|
|
self._path = '\\\\?\\' + self.path.replace(/\//g, '\\')
|
|
}
|
|
}
|
|
self.basename = path.basename(props.path)
|
|
self.dirname = path.dirname(props.path)
|
|
self.linkpath = props.linkpath || null
|
|
|
|
props.parent = props.root = null
|
|
|
|
// console.error("\n\n\n%s setting size to", props.path, props.size)
|
|
self.size = props.size
|
|
|
|
if (typeof props.mode === 'string') {
|
|
props.mode = parseInt(props.mode, 8)
|
|
}
|
|
|
|
self.readable = false
|
|
self.writable = true
|
|
|
|
// buffer until ready, or while handling another entry
|
|
self._buffer = []
|
|
self.ready = false
|
|
|
|
self.filter = typeof props.filter === 'function' ? props.filter : null
|
|
|
|
// start the ball rolling.
|
|
// this checks what's there already, and then calls
|
|
// self._create() to call the impl-specific creation stuff.
|
|
self._stat(current)
|
|
}
|
|
|
|
// Calling this means that it's something we can't create.
|
|
// Just assert that it's already there, otherwise raise a warning.
|
|
Writer.prototype._create = function () {
|
|
var self = this
|
|
fs[self.props.follow ? 'stat' : 'lstat'](self._path, function (er) {
|
|
if (er) {
|
|
return self.warn('Cannot create ' + self._path + '\n' +
|
|
'Unsupported type: ' + self.type, 'ENOTSUP')
|
|
}
|
|
self._finish()
|
|
})
|
|
}
|
|
|
|
Writer.prototype._stat = function (current) {
|
|
var self = this
|
|
var props = self.props
|
|
var stat = props.follow ? 'stat' : 'lstat'
|
|
var who = self._proxy || self
|
|
|
|
if (current) statCb(null, current)
|
|
else fs[stat](self._path, statCb)
|
|
|
|
function statCb (er, current) {
|
|
if (self.filter && !self.filter.call(who, who, current)) {
|
|
self._aborted = true
|
|
self.emit('end')
|
|
self.emit('close')
|
|
return
|
|
}
|
|
|
|
// if it's not there, great. We'll just create it.
|
|
// if it is there, then we'll need to change whatever differs
|
|
if (er || !current) {
|
|
return create(self)
|
|
}
|
|
|
|
self._old = current
|
|
var currentType = getType(current)
|
|
|
|
// if it's a type change, then we need to clobber or error.
|
|
// if it's not a type change, then let the impl take care of it.
|
|
if (currentType !== self.type || self.type === 'File' && current.nlink > 1) {
|
|
return rimraf(self._path, function (er) {
|
|
if (er) return self.error(er)
|
|
self._old = null
|
|
create(self)
|
|
})
|
|
}
|
|
|
|
// otherwise, just handle in the app-specific way
|
|
// this creates a fs.WriteStream, or mkdir's, or whatever
|
|
create(self)
|
|
}
|
|
}
|
|
|
|
function create (self) {
|
|
// console.error("W create", self._path, Writer.dirmode)
|
|
|
|
// XXX Need to clobber non-dirs that are in the way,
|
|
// unless { clobber: false } in the props.
|
|
mkdir(path.dirname(self._path), Writer.dirmode, function (er, made) {
|
|
// console.error("W created", path.dirname(self._path), er)
|
|
if (er) return self.error(er)
|
|
|
|
// later on, we have to set the mode and owner for these
|
|
self._madeDir = made
|
|
return self._create()
|
|
})
|
|
}
|
|
|
|
function endChmod (self, want, current, path, cb) {
|
|
var wantMode = want.mode
|
|
var chmod = want.follow || self.type !== 'SymbolicLink'
|
|
? 'chmod' : 'lchmod'
|
|
|
|
if (!fs[chmod]) return cb()
|
|
if (typeof wantMode !== 'number') return cb()
|
|
|
|
var curMode = current.mode & parseInt('0777', 8)
|
|
wantMode = wantMode & parseInt('0777', 8)
|
|
if (wantMode === curMode) return cb()
|
|
|
|
fs[chmod](path, wantMode, cb)
|
|
}
|
|
|
|
function endChown (self, want, current, path, cb) {
|
|
// Don't even try it unless root. Too easy to EPERM.
|
|
if (process.platform === 'win32') return cb()
|
|
if (!process.getuid || process.getuid() !== 0) return cb()
|
|
if (typeof want.uid !== 'number' &&
|
|
typeof want.gid !== 'number') return cb()
|
|
|
|
if (current.uid === want.uid &&
|
|
current.gid === want.gid) return cb()
|
|
|
|
var chown = (self.props.follow || self.type !== 'SymbolicLink')
|
|
? 'chown' : 'lchown'
|
|
if (!fs[chown]) return cb()
|
|
|
|
if (typeof want.uid !== 'number') want.uid = current.uid
|
|
if (typeof want.gid !== 'number') want.gid = current.gid
|
|
|
|
fs[chown](path, want.uid, want.gid, cb)
|
|
}
|
|
|
|
function endUtimes (self, want, current, path, cb) {
|
|
if (!fs.utimes || process.platform === 'win32') return cb()
|
|
|
|
var utimes = (want.follow || self.type !== 'SymbolicLink')
|
|
? 'utimes' : 'lutimes'
|
|
|
|
if (utimes === 'lutimes' && !fs[utimes]) {
|
|
utimes = 'utimes'
|
|
}
|
|
|
|
if (!fs[utimes]) return cb()
|
|
|
|
var curA = current.atime
|
|
var curM = current.mtime
|
|
var meA = want.atime
|
|
var meM = want.mtime
|
|
|
|
if (meA === undefined) meA = curA
|
|
if (meM === undefined) meM = curM
|
|
|
|
if (!isDate(meA)) meA = new Date(meA)
|
|
if (!isDate(meM)) meA = new Date(meM)
|
|
|
|
if (meA.getTime() === curA.getTime() &&
|
|
meM.getTime() === curM.getTime()) return cb()
|
|
|
|
fs[utimes](path, meA, meM, cb)
|
|
}
|
|
|
|
// XXX This function is beastly. Break it up!
|
|
Writer.prototype._finish = function () {
|
|
var self = this
|
|
|
|
if (self._finishing) return
|
|
self._finishing = true
|
|
|
|
// console.error(" W Finish", self._path, self.size)
|
|
|
|
// set up all the things.
|
|
// At this point, we're already done writing whatever we've gotta write,
|
|
// adding files to the dir, etc.
|
|
var todo = 0
|
|
var errState = null
|
|
var done = false
|
|
|
|
if (self._old) {
|
|
// the times will almost *certainly* have changed.
|
|
// adds the utimes syscall, but remove another stat.
|
|
self._old.atime = new Date(0)
|
|
self._old.mtime = new Date(0)
|
|
// console.error(" W Finish Stale Stat", self._path, self.size)
|
|
setProps(self._old)
|
|
} else {
|
|
var stat = self.props.follow ? 'stat' : 'lstat'
|
|
// console.error(" W Finish Stating", self._path, self.size)
|
|
fs[stat](self._path, function (er, current) {
|
|
// console.error(" W Finish Stated", self._path, self.size, current)
|
|
if (er) {
|
|
// if we're in the process of writing out a
|
|
// directory, it's very possible that the thing we're linking to
|
|
// doesn't exist yet (especially if it was intended as a symlink),
|
|
// so swallow ENOENT errors here and just soldier on.
|
|
if (er.code === 'ENOENT' &&
|
|
(self.type === 'Link' || self.type === 'SymbolicLink') &&
|
|
process.platform === 'win32') {
|
|
self.ready = true
|
|
self.emit('ready')
|
|
self.emit('end')
|
|
self.emit('close')
|
|
self.end = self._finish = function () {}
|
|
return
|
|
} else return self.error(er)
|
|
}
|
|
setProps(self._old = current)
|
|
})
|
|
}
|
|
|
|
return
|
|
|
|
function setProps (current) {
|
|
todo += 3
|
|
endChmod(self, self.props, current, self._path, next('chmod'))
|
|
endChown(self, self.props, current, self._path, next('chown'))
|
|
endUtimes(self, self.props, current, self._path, next('utimes'))
|
|
}
|
|
|
|
function next (what) {
|
|
return function (er) {
|
|
// console.error(" W Finish", what, todo)
|
|
if (errState) return
|
|
if (er) {
|
|
er.fstream_finish_call = what
|
|
return self.error(errState = er)
|
|
}
|
|
if (--todo > 0) return
|
|
if (done) return
|
|
done = true
|
|
|
|
// we may still need to set the mode/etc. on some parent dirs
|
|
// that were created previously. delay end/close until then.
|
|
if (!self._madeDir) return end()
|
|
else endMadeDir(self, self._path, end)
|
|
|
|
function end (er) {
|
|
if (er) {
|
|
er.fstream_finish_call = 'setupMadeDir'
|
|
return self.error(er)
|
|
}
|
|
// all the props have been set, so we're completely done.
|
|
self.emit('end')
|
|
self.emit('close')
|
|
}
|
|
}
|
|
}
|
|
}
|
|
|
|
function endMadeDir (self, p, cb) {
|
|
var made = self._madeDir
|
|
// everything *between* made and path.dirname(self._path)
|
|
// needs to be set up. Note that this may just be one dir.
|
|
var d = path.dirname(p)
|
|
|
|
endMadeDir_(self, d, function (er) {
|
|
if (er) return cb(er)
|
|
if (d === made) {
|
|
return cb()
|
|
}
|
|
endMadeDir(self, d, cb)
|
|
})
|
|
}
|
|
|
|
function endMadeDir_ (self, p, cb) {
|
|
var dirProps = {}
|
|
Object.keys(self.props).forEach(function (k) {
|
|
dirProps[k] = self.props[k]
|
|
|
|
// only make non-readable dirs if explicitly requested.
|
|
if (k === 'mode' && self.type !== 'Directory') {
|
|
dirProps[k] = dirProps[k] | parseInt('0111', 8)
|
|
}
|
|
})
|
|
|
|
var todo = 3
|
|
var errState = null
|
|
fs.stat(p, function (er, current) {
|
|
if (er) return cb(errState = er)
|
|
endChmod(self, dirProps, current, p, next)
|
|
endChown(self, dirProps, current, p, next)
|
|
endUtimes(self, dirProps, current, p, next)
|
|
})
|
|
|
|
function next (er) {
|
|
if (errState) return
|
|
if (er) return cb(errState = er)
|
|
if (--todo === 0) return cb()
|
|
}
|
|
}
|
|
|
|
Writer.prototype.pipe = function () {
|
|
this.error("Can't pipe from writable stream")
|
|
}
|
|
|
|
Writer.prototype.add = function () {
|
|
this.error("Can't add to non-Directory type")
|
|
}
|
|
|
|
Writer.prototype.write = function () {
|
|
return true
|
|
}
|
|
|
|
function objectToString (d) {
|
|
return Object.prototype.toString.call(d)
|
|
}
|
|
|
|
function isDate (d) {
|
|
return typeof d === 'object' && objectToString(d) === '[object Date]'
|
|
}
|