382 lines
13 KiB
JavaScript
382 lines
13 KiB
JavaScript
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/**
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* @fileoverview Responsible for loading ignore config files and managing ignore patterns
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* @author Jonathan Rajavuori
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*/
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"use strict";
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//------------------------------------------------------------------------------
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// Requirements
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//------------------------------------------------------------------------------
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const fs = require("fs"),
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path = require("path"),
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ignore = require("ignore"),
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pathUtils = require("./path-utils");
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const debug = require("debug")("eslint:ignored-paths");
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//------------------------------------------------------------------------------
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// Constants
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//------------------------------------------------------------------------------
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const ESLINT_IGNORE_FILENAME = ".eslintignore";
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/**
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* Adds `"*"` at the end of `"node_modules/"`,
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* so that subtle directories could be re-included by .gitignore patterns
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* such as `"!node_modules/should_not_ignored"`
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*/
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const DEFAULT_IGNORE_DIRS = [
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"/node_modules/*",
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"/bower_components/*"
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];
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const DEFAULT_OPTIONS = {
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dotfiles: false,
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cwd: process.cwd()
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};
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//------------------------------------------------------------------------------
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// Helpers
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//------------------------------------------------------------------------------
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/**
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* Find a file in the current directory.
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* @param {string} cwd Current working directory
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* @param {string} name File name
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* @returns {string} Path of ignore file or an empty string.
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*/
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function findFile(cwd, name) {
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const ignoreFilePath = path.resolve(cwd, name);
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return fs.existsSync(ignoreFilePath) && fs.statSync(ignoreFilePath).isFile() ? ignoreFilePath : "";
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}
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/**
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* Find an ignore file in the current directory.
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* @param {string} cwd Current working directory
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* @returns {string} Path of ignore file or an empty string.
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*/
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function findIgnoreFile(cwd) {
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return findFile(cwd, ESLINT_IGNORE_FILENAME);
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}
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/**
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* Find an package.json file in the current directory.
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* @param {string} cwd Current working directory
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* @returns {string} Path of package.json file or an empty string.
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*/
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function findPackageJSONFile(cwd) {
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return findFile(cwd, "package.json");
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}
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/**
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* Merge options with defaults
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* @param {Object} options Options to merge with DEFAULT_OPTIONS constant
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* @returns {Object} Merged options
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*/
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function mergeDefaultOptions(options) {
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return Object.assign({}, DEFAULT_OPTIONS, options);
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}
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/* eslint-disable valid-jsdoc */
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/**
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* Normalize the path separators in a given string.
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* On Windows environment, this replaces `\` by `/`.
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* Otherwrise, this does nothing.
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* @param {string} str The path string to normalize.
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* @returns {string} The normalized path.
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*/
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const normalizePathSeps = path.sep === "/"
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? (str => str)
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: ((seps, str) => str.replace(seps, "/")).bind(null, new RegExp(`\\${path.sep}`, "gu"));
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/* eslint-enable valid-jsdoc */
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/**
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* Converts a glob pattern to a new glob pattern relative to a different directory
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* @param {string} globPattern The glob pattern, relative the the old base directory
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* @param {string} relativePathToOldBaseDir A relative path from the new base directory to the old one
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* @returns {string} A glob pattern relative to the new base directory
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*/
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function relativize(globPattern, relativePathToOldBaseDir) {
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if (relativePathToOldBaseDir === "") {
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return globPattern;
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}
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const prefix = globPattern.startsWith("!") ? "!" : "";
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const globWithoutPrefix = globPattern.replace(/^!/u, "");
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if (globWithoutPrefix.startsWith("/")) {
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return `${prefix}/${normalizePathSeps(relativePathToOldBaseDir)}${globWithoutPrefix}`;
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}
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return globPattern;
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}
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//------------------------------------------------------------------------------
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// Public Interface
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//------------------------------------------------------------------------------
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/**
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* IgnoredPaths class
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*/
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class IgnoredPaths {
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/**
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* @param {Object} providedOptions object containing 'ignore', 'ignorePath' and 'patterns' properties
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*/
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constructor(providedOptions) {
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const options = mergeDefaultOptions(providedOptions);
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this.cache = {};
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this.defaultPatterns = [].concat(DEFAULT_IGNORE_DIRS, options.patterns || []);
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this.ignoreFileDir = options.ignore !== false && options.ignorePath
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? path.dirname(path.resolve(options.cwd, options.ignorePath))
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: options.cwd;
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this.options = options;
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this._baseDir = null;
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this.ig = {
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custom: ignore(),
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default: ignore()
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};
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this.defaultPatterns.forEach(pattern => this.addPatternRelativeToCwd(this.ig.default, pattern));
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if (options.dotfiles !== true) {
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/*
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* ignore files beginning with a dot, but not files in a parent or
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* ancestor directory (which in relative format will begin with `../`).
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*/
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this.addPatternRelativeToCwd(this.ig.default, ".*");
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this.addPatternRelativeToCwd(this.ig.default, "!../");
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}
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/*
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* Add a way to keep track of ignored files. This was present in node-ignore
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* 2.x, but dropped for now as of 3.0.10.
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*/
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this.ig.custom.ignoreFiles = [];
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this.ig.default.ignoreFiles = [];
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if (options.ignore !== false) {
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let ignorePath;
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if (options.ignorePath) {
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debug("Using specific ignore file");
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try {
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fs.statSync(options.ignorePath);
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ignorePath = options.ignorePath;
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} catch (e) {
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e.message = `Cannot read ignore file: ${options.ignorePath}\nError: ${e.message}`;
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throw e;
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}
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} else {
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debug(`Looking for ignore file in ${options.cwd}`);
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ignorePath = findIgnoreFile(options.cwd);
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try {
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fs.statSync(ignorePath);
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debug(`Loaded ignore file ${ignorePath}`);
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} catch (e) {
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debug("Could not find ignore file in cwd");
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}
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}
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if (ignorePath) {
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debug(`Adding ${ignorePath}`);
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this.addIgnoreFile(this.ig.custom, ignorePath);
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this.addIgnoreFile(this.ig.default, ignorePath);
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} else {
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try {
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// if the ignoreFile does not exist, check package.json for eslintIgnore
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const packageJSONPath = findPackageJSONFile(options.cwd);
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if (packageJSONPath) {
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let packageJSONOptions;
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try {
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packageJSONOptions = JSON.parse(fs.readFileSync(packageJSONPath, "utf8"));
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} catch (e) {
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debug("Could not read package.json file to check eslintIgnore property");
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e.messageTemplate = "failed-to-read-json";
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e.messageData = {
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path: packageJSONPath,
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message: e.message
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};
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throw e;
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}
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if (packageJSONOptions.eslintIgnore) {
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if (Array.isArray(packageJSONOptions.eslintIgnore)) {
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packageJSONOptions.eslintIgnore.forEach(pattern => {
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this.addPatternRelativeToIgnoreFile(this.ig.custom, pattern);
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this.addPatternRelativeToIgnoreFile(this.ig.default, pattern);
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});
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} else {
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throw new TypeError("Package.json eslintIgnore property requires an array of paths");
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}
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}
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}
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} catch (e) {
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debug("Could not find package.json to check eslintIgnore property");
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throw e;
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}
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}
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if (options.ignorePattern) {
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this.addPatternRelativeToCwd(this.ig.custom, options.ignorePattern);
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this.addPatternRelativeToCwd(this.ig.default, options.ignorePattern);
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}
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}
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}
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/*
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* If `ignoreFileDir` is a subdirectory of `cwd`, all paths will be normalized to be relative to `cwd`.
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* Otherwise, all paths will be normalized to be relative to `ignoreFileDir`.
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* This ensures that the final normalized ignore rule will not contain `..`, which is forbidden in
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* ignore rules.
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*/
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addPatternRelativeToCwd(ig, pattern) {
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const baseDir = this.getBaseDir();
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const cookedPattern = baseDir === this.options.cwd
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? pattern
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: relativize(pattern, path.relative(baseDir, this.options.cwd));
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ig.addPattern(cookedPattern);
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debug("addPatternRelativeToCwd:\n original = %j\n cooked = %j", pattern, cookedPattern);
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}
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addPatternRelativeToIgnoreFile(ig, pattern) {
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const baseDir = this.getBaseDir();
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const cookedPattern = baseDir === this.ignoreFileDir
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? pattern
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: relativize(pattern, path.relative(baseDir, this.ignoreFileDir));
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ig.addPattern(cookedPattern);
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debug("addPatternRelativeToIgnoreFile:\n original = %j\n cooked = %j", pattern, cookedPattern);
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}
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// Detect the common ancestor
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getBaseDir() {
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if (!this._baseDir) {
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const a = path.resolve(this.options.cwd);
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const b = path.resolve(this.ignoreFileDir);
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let lastSepPos = 0;
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// Set the shorter one (it's the common ancestor if one includes the other).
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this._baseDir = a.length < b.length ? a : b;
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// Set the common ancestor.
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for (let i = 0; i < a.length && i < b.length; ++i) {
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if (a[i] !== b[i]) {
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this._baseDir = a.slice(0, lastSepPos);
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break;
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}
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if (a[i] === path.sep) {
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lastSepPos = i;
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}
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}
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// If it's only Windows drive letter, it needs \
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if (/^[A-Z]:$/u.test(this._baseDir)) {
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this._baseDir += "\\";
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}
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debug("baseDir = %j", this._baseDir);
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}
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return this._baseDir;
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}
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/**
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* read ignore filepath
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* @param {string} filePath, file to add to ig
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* @returns {Array} raw ignore rules
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*/
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readIgnoreFile(filePath) {
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if (typeof this.cache[filePath] === "undefined") {
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this.cache[filePath] = fs.readFileSync(filePath, "utf8").split(/\r?\n/gu).filter(Boolean);
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}
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return this.cache[filePath];
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}
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/**
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* add ignore file to node-ignore instance
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* @param {Object} ig instance of node-ignore
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* @param {string} filePath file to add to ig
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* @returns {void}
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*/
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addIgnoreFile(ig, filePath) {
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ig.ignoreFiles.push(filePath);
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this
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.readIgnoreFile(filePath)
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.forEach(ignoreRule => this.addPatternRelativeToIgnoreFile(ig, ignoreRule));
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}
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/**
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* Determine whether a file path is included in the default or custom ignore patterns
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* @param {string} filepath Path to check
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* @param {string} [category=undefined] check 'default', 'custom' or both (undefined)
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* @returns {boolean} true if the file path matches one or more patterns, false otherwise
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*/
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contains(filepath, category) {
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let result = false;
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const absolutePath = path.resolve(this.options.cwd, filepath);
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const relativePath = pathUtils.getRelativePath(absolutePath, this.getBaseDir());
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if (typeof category === "undefined") {
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result = (this.ig.default.filter([relativePath]).length === 0) ||
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(this.ig.custom.filter([relativePath]).length === 0);
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} else {
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result = (this.ig[category].filter([relativePath]).length === 0);
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}
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debug("contains:");
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debug(" target = %j", filepath);
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debug(" result = %j", result);
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return result;
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}
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/**
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* Returns a list of dir patterns for glob to ignore
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* @returns {function()} method to check whether a folder should be ignored by glob.
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*/
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getIgnoredFoldersGlobChecker() {
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const baseDir = this.getBaseDir();
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const ig = ignore();
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DEFAULT_IGNORE_DIRS.forEach(ignoreDir => this.addPatternRelativeToCwd(ig, ignoreDir));
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if (this.options.dotfiles !== true) {
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// Ignore hidden folders. (This cannot be ".*", or else it's not possible to unignore hidden files)
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ig.add([".*/*", "!../*"]);
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}
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if (this.options.ignore) {
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ig.add(this.ig.custom);
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}
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const filter = ig.createFilter();
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return function(absolutePath) {
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const relative = pathUtils.getRelativePath(absolutePath, baseDir);
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if (!relative) {
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return false;
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}
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return !filter(relative);
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};
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}
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}
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module.exports = IgnoredPaths;
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