283 lines
8.3 KiB
JavaScript
283 lines
8.3 KiB
JavaScript
'use strict';
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const fs = require('fs');
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const { Readable } = require('stream');
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const sysPath = require('path');
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const { promisify } = require('util');
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const picomatch = require('picomatch');
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const readdir = promisify(fs.readdir);
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const stat = promisify(fs.stat);
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const lstat = promisify(fs.lstat);
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const realpath = promisify(fs.realpath);
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/**
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* @typedef {Object} EntryInfo
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* @property {String} path
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* @property {String} fullPath
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* @property {fs.Stats=} stats
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* @property {fs.Dirent=} dirent
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* @property {String} basename
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*/
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const BANG = '!';
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const NORMAL_FLOW_ERRORS = new Set(['ENOENT', 'EPERM', 'EACCES', 'ELOOP']);
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const FILE_TYPE = 'files';
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const DIR_TYPE = 'directories';
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const FILE_DIR_TYPE = 'files_directories';
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const EVERYTHING_TYPE = 'all';
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const ALL_TYPES = [FILE_TYPE, DIR_TYPE, FILE_DIR_TYPE, EVERYTHING_TYPE];
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const isNormalFlowError = error => NORMAL_FLOW_ERRORS.has(error.code);
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const normalizeFilter = filter => {
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if (filter === undefined) return;
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if (typeof filter === 'function') return filter;
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if (typeof filter === 'string') {
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const glob = picomatch(filter.trim());
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return entry => glob(entry.basename);
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}
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if (Array.isArray(filter)) {
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const positive = [];
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const negative = [];
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for (const item of filter) {
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const trimmed = item.trim();
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if (trimmed.charAt(0) === BANG) {
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negative.push(picomatch(trimmed.slice(1)));
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} else {
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positive.push(picomatch(trimmed));
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}
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}
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if (negative.length > 0) {
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if (positive.length > 0) {
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return entry =>
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positive.some(f => f(entry.basename)) && !negative.some(f => f(entry.basename));
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}
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return entry => !negative.some(f => f(entry.basename));
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}
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return entry => positive.some(f => f(entry.basename));
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}
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};
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class ReaddirpStream extends Readable {
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static get defaultOptions() {
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return {
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root: '.',
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/* eslint-disable no-unused-vars */
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fileFilter: (path) => true,
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directoryFilter: (path) => true,
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/* eslint-enable no-unused-vars */
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type: FILE_TYPE,
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lstat: false,
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depth: 2147483648,
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alwaysStat: false
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};
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}
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constructor(options = {}) {
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super({
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objectMode: true,
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autoDestroy: true,
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highWaterMark: options.highWaterMark || 4096
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});
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const opts = { ...ReaddirpStream.defaultOptions, ...options };
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const { root, type } = opts;
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this._fileFilter = normalizeFilter(opts.fileFilter);
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this._directoryFilter = normalizeFilter(opts.directoryFilter);
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const statMethod = opts.lstat ? lstat : stat;
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// Use bigint stats if it's windows and stat() supports options (node 10+).
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if (process.platform === 'win32' && stat.length === 3) {
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this._stat = path => statMethod(path, { bigint: true });
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} else {
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this._stat = statMethod;
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}
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this._maxDepth = opts.depth;
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this._wantsDir = [DIR_TYPE, FILE_DIR_TYPE, EVERYTHING_TYPE].includes(type);
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this._wantsFile = [FILE_TYPE, FILE_DIR_TYPE, EVERYTHING_TYPE].includes(type);
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this._wantsEverything = type === EVERYTHING_TYPE;
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this._root = sysPath.resolve(root);
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this._isDirent = ('Dirent' in fs) && !opts.alwaysStat;
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this._statsProp = this._isDirent ? 'dirent' : 'stats';
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this._rdOptions = { encoding: 'utf8', withFileTypes: this._isDirent };
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// Launch stream with one parent, the root dir.
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this.parents = [this._exploreDir(root, 1)];
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this.reading = false;
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this.parent = undefined;
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}
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async _read(batch) {
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if (this.reading) return;
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this.reading = true;
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try {
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while (!this.destroyed && batch > 0) {
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const { path, depth, files = [] } = this.parent || {};
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if (files.length > 0) {
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const slice = files.splice(0, batch).map(dirent => this._formatEntry(dirent, path));
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for (const entry of await Promise.all(slice)) {
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if (this.destroyed) return;
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const entryType = await this._getEntryType(entry);
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if (entryType === 'directory' && this._directoryFilter(entry)) {
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if (depth <= this._maxDepth) {
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this.parents.push(this._exploreDir(entry.fullPath, depth + 1));
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}
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if (this._wantsDir) {
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this.push(entry);
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batch--;
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}
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} else if ((entryType === 'file' || this._includeAsFile(entry)) && this._fileFilter(entry)) {
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if (this._wantsFile) {
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this.push(entry);
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batch--;
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}
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}
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}
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} else {
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const parent = this.parents.pop();
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if (!parent) {
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this.push(null);
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break;
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}
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this.parent = await parent;
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if (this.destroyed) return;
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}
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}
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} catch (error) {
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this.destroy(error);
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} finally {
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this.reading = false;
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}
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}
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async _exploreDir(path, depth) {
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let files;
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try {
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files = await readdir(path, this._rdOptions);
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} catch (error) {
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this._onError(error);
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}
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return {files, depth, path};
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}
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async _formatEntry(dirent, path) {
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let entry;
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try {
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const basename = this._isDirent ? dirent.name : dirent;
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const fullPath = sysPath.resolve(sysPath.join(path, basename));
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entry = {path: sysPath.relative(this._root, fullPath), fullPath, basename};
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entry[this._statsProp] = this._isDirent ? dirent : await this._stat(fullPath);
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} catch (err) {
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this._onError(err);
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}
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return entry;
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}
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_onError(err) {
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if (isNormalFlowError(err) && !this.destroyed) {
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this.emit('warn', err);
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} else {
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this.destroy(err);
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}
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}
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async _getEntryType(entry) {
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// entry may be undefined, because a warning or an error were emitted
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// and the statsProp is undefined
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const stats = entry && entry[this._statsProp];
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if (!stats) {
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return;
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}
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if (stats.isFile()) {
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return 'file';
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}
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if (stats.isDirectory()) {
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return 'directory';
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}
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if (stats && stats.isSymbolicLink()) {
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const full = entry.fullPath;
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try {
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const entryRealPath = await realpath(full);
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const entryRealPathStats = await lstat(entryRealPath);
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if (entryRealPathStats.isFile()) {
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return 'file';
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}
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if (entryRealPathStats.isDirectory()) {
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const len = entryRealPath.length;
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if (full.startsWith(entryRealPath) && full.substr(len, 1) === sysPath.sep) {
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return this._onError(new Error(
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`Circular symlink detected: "${full}" points to "${entryRealPath}"`
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));
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}
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return 'directory';
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}
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} catch (error) {
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this._onError(error);
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}
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}
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}
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_includeAsFile(entry) {
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const stats = entry && entry[this._statsProp];
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return stats && this._wantsEverything && !stats.isDirectory();
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}
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}
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/**
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* @typedef {Object} ReaddirpArguments
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* @property {Function=} fileFilter
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* @property {Function=} directoryFilter
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* @property {String=} type
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* @property {Number=} depth
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* @property {String=} root
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* @property {Boolean=} lstat
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* @property {Boolean=} bigint
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*/
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/**
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* Main function which ends up calling readdirRec and reads all files and directories in given root recursively.
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* @param {String} root Root directory
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* @param {ReaddirpArguments=} options Options to specify root (start directory), filters and recursion depth
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*/
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const readdirp = (root, options = {}) => {
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let type = options.entryType || options.type;
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if (type === 'both') type = FILE_DIR_TYPE; // backwards-compatibility
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if (type) options.type = type;
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if (!root) {
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throw new Error('readdirp: root argument is required. Usage: readdirp(root, options)');
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} else if (typeof root !== 'string') {
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throw new TypeError('readdirp: root argument must be a string. Usage: readdirp(root, options)');
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} else if (type && !ALL_TYPES.includes(type)) {
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throw new Error(`readdirp: Invalid type passed. Use one of ${ALL_TYPES.join(', ')}`);
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}
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options.root = root;
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return new ReaddirpStream(options);
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};
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const readdirpPromise = (root, options = {}) => {
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return new Promise((resolve, reject) => {
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const files = [];
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readdirp(root, options)
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.on('data', entry => files.push(entry))
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.on('end', () => resolve(files))
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.on('error', error => reject(error));
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});
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};
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readdirp.promise = readdirpPromise;
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readdirp.ReaddirpStream = ReaddirpStream;
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readdirp.default = readdirp;
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module.exports = readdirp;
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