289 lines
9.2 KiB
JavaScript
289 lines
9.2 KiB
JavaScript
/**
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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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pathUtil = require("./util/path-util");
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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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options = (options || {});
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return Object.assign({}, DEFAULT_OPTIONS, options);
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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} options object containing 'ignore', 'ignorePath' and 'patterns' properties
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*/
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constructor(options) {
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options = mergeDefaultOptions(options);
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this.cache = {};
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/**
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* add pattern to node-ignore instance
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* @param {Object} ig, instance of node-ignore
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* @param {string} pattern, pattern do add to ig
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* @returns {array} raw ignore rules
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*/
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function addPattern(ig, pattern) {
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return ig.addPattern(pattern);
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}
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this.defaultPatterns = [].concat(DEFAULT_IGNORE_DIRS, options.patterns || []);
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this.baseDir = options.cwd;
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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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/*
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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.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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addPattern(this.ig.default, [".*", "!../"]);
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}
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addPattern(this.ig.default, this.defaultPatterns);
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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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this.options = options;
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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.baseDir = path.dirname(path.resolve(options.cwd, 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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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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addPattern(this.ig.custom, pattern);
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addPattern(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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addPattern(this.ig.custom, options.ignorePattern);
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addPattern(this.ig.default, options.ignorePattern);
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}
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}
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this.options = options;
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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");
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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 {array} raw ignore rules
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*/
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addIgnoreFile(ig, filePath) {
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ig.ignoreFiles.push(filePath);
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return ig.add(this.readIgnoreFile(filePath));
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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=null] check 'default', 'custom' or both (null)
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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 = pathUtil.getRelativePath(absolutePath, this.baseDir);
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if ((typeof category === "undefined") || (category === "default")) {
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result = result || (this.ig.default.filter([relativePath]).length === 0);
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}
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if ((typeof category === "undefined") || (category === "custom")) {
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result = result || (this.ig.custom.filter([relativePath]).length === 0);
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}
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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 ig = ignore().add(DEFAULT_IGNORE_DIRS);
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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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const base = this.baseDir;
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return function(absolutePath) {
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const relative = pathUtil.getRelativePath(absolutePath, base);
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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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