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files >> //lib/node_modules/npm/node_modules/ignore-walk/index.js
'use strict' const fs = require('fs') const path = require('path') const EE = require('events').EventEmitter const Minimatch = require('minimatch').Minimatch class Walker extends EE { constructor (opts) { opts = opts || {} super(opts) this.path = opts.path || process.cwd() this.basename = path.basename(this.path) this.ignoreFiles = opts.ignoreFiles || [ '.ignore' ] this.ignoreRules = {} this.parent = opts.parent || null this.includeEmpty = !!opts.includeEmpty this.root = this.parent ? this.parent.root : this.path this.follow = !!opts.follow this.result = this.parent ? this.parent.result : new Set() this.entries = null this.sawError = false } sort (a, b) { return a.localeCompare(b) } emit (ev, data) { let ret = false if (!(this.sawError && ev === 'error')) { if (ev === 'error') this.sawError = true else if (ev === 'done' && !this.parent) { data = Array.from(data) .map(e => /^@/.test(e) ? `./${e}` : e).sort(this.sort) this.result = data } if (ev === 'error' && this.parent) ret = this.parent.emit('error', data) else ret = super.emit(ev, data) } return ret } start () { fs.readdir(this.path, (er, entries) => er ? this.emit('error', er) : this.onReaddir(entries)) return this } isIgnoreFile (e) { return e !== "." && e !== ".." && -1 !== this.ignoreFiles.indexOf(e) } onReaddir (entries) { this.entries = entries if (entries.length === 0) { if (this.includeEmpty) this.result.add(this.path.substr(this.root.length + 1)) this.emit('done', this.result) } else { const hasIg = this.entries.some(e => this.isIgnoreFile(e)) if (hasIg) this.addIgnoreFiles() else this.filterEntries() } } addIgnoreFiles () { const newIg = this.entries .filter(e => this.isIgnoreFile(e)) let igCount = newIg.length const then = _ => { if (--igCount === 0) this.filterEntries() } newIg.forEach(e => this.addIgnoreFile(e, then)) } addIgnoreFile (file, then) { const ig = path.resolve(this.path, file) fs.readFile(ig, 'utf8', (er, data) => er ? this.emit('error', er) : this.onReadIgnoreFile(file, data, then)) } onReadIgnoreFile (file, data, then) { const mmopt = { matchBase: true, dot: true, flipNegate: true, nocase: true } const rules = data.split(/\r?\n/) .filter(line => !/^#|^$/.test(line.trim())) .map(r => new Minimatch(r, mmopt)) this.ignoreRules[file] = rules then() } filterEntries () { // at this point we either have ignore rules, or just inheriting // this exclusion is at the point where we know the list of // entries in the dir, but don't know what they are. since // some of them *might* be directories, we have to run the // match in dir-mode as well, so that we'll pick up partials // of files that will be included later. Anything included // at this point will be checked again later once we know // what it is. const filtered = this.entries.map(entry => { // at this point, we don't know if it's a dir or not. const passFile = this.filterEntry(entry) const passDir = this.filterEntry(entry, true) return (passFile || passDir) ? [entry, passFile, passDir] : false }).filter(e => e) // now we stat them all // if it's a dir, and passes as a dir, then recurse // if it's not a dir, but passes as a file, add to set let entryCount = filtered.length if (entryCount === 0) { this.emit('done', this.result) } else { const then = _ => { if (-- entryCount === 0) this.emit('done', this.result) } filtered.forEach(filt => { const entry = filt[0] const file = filt[1] const dir = filt[2] this.stat(entry, file, dir, then) }) } } onstat (st, entry, file, dir, then) { const abs = this.path + '/' + entry if (!st.isDirectory()) { if (file) this.result.add(abs.substr(this.root.length + 1)) then() } else { // is a directory if (dir) this.walker(entry, then) else then() } } stat (entry, file, dir, then) { const abs = this.path + '/' + entry fs[this.follow ? 'stat' : 'lstat'](abs, (er, st) => { if (er) this.emit('error', er) else this.onstat(st, entry, file, dir, then) }) } walkerOpt (entry) { return { path: this.path + '/' + entry, parent: this, ignoreFiles: this.ignoreFiles, follow: this.follow, includeEmpty: this.includeEmpty } } walker (entry, then) { new Walker(this.walkerOpt(entry)).on('done', then).start() } filterEntry (entry, partial) { let included = true // this = /a/b/c // entry = d // parent /a/b sees c/d if (this.parent && this.parent.filterEntry) { var pt = this.basename + "/" + entry included = this.parent.filterEntry(pt, partial) } this.ignoreFiles.forEach(f => { if (this.ignoreRules[f]) { this.ignoreRules[f].forEach(rule => { // negation means inclusion // so if it's negated, and already included, no need to check // likewise if it's neither negated nor included if (rule.negate !== included) { // first, match against /foo/bar // then, against foo/bar // then, in the case of partials, match with a / const match = rule.match('/' + entry) || rule.match(entry) || (!!partial && ( rule.match('/' + entry + '/') || rule.match(entry + '/'))) || (!!partial && rule.negate && ( rule.match('/' + entry, true) || rule.match(entry, true))) if (match) included = rule.negate } }) } }) return included } } class WalkerSync extends Walker { constructor (opt) { super(opt) } start () { this.onReaddir(fs.readdirSync(this.path)) return this } addIgnoreFile (file, then) { const ig = path.resolve(this.path, file) this.onReadIgnoreFile(file, fs.readFileSync(ig, 'utf8'), then) } stat (entry, file, dir, then) { const abs = this.path + '/' + entry const st = fs[this.follow ? 'statSync' : 'lstatSync'](abs) this.onstat(st, entry, file, dir, then) } walker (entry, then) { new WalkerSync(this.walkerOpt(entry)).start() then() } } const walk = (options, callback) => { const p = new Promise((resolve, reject) => { new Walker(options).on('done', resolve).on('error', reject).start() }) return callback ? p.then(res => callback(null, res), callback) : p } const walkSync = options => { return new WalkerSync(options).start().result } module.exports = walk walk.sync = walkSync walk.Walker = Walker walk.WalkerSync = WalkerSync
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