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Mini Shell
Mini Shell
'use strict';
const fs = require('fs');
const { Readable } = require('stream');
const sysPath = require('path');
const { promisify } = require('util');
const picomatch = require('picomatch');
const readdir = promisify(fs.readdir);
const stat = promisify(fs.stat);
const lstat = promisify(fs.lstat);
const realpath = promisify(fs.realpath);
/**
* @typedef {Object} EntryInfo
* @property {String} path
* @property {String} fullPath
* @property {fs.Stats=} stats
* @property {fs.Dirent=} dirent
* @property {String} basename
*/
const BANG = '!';
const RECURSIVE_ERROR_CODE = 'READDIRP_RECURSIVE_ERROR';
const NORMAL_FLOW_ERRORS = new Set(['ENOENT', 'EPERM', 'EACCES', 'ELOOP', RECURSIVE_ERROR_CODE]);
const FILE_TYPE = 'files';
const DIR_TYPE = 'directories';
const FILE_DIR_TYPE = 'files_directories';
const EVERYTHING_TYPE = 'all';
const ALL_TYPES = [FILE_TYPE, DIR_TYPE, FILE_DIR_TYPE, EVERYTHING_TYPE];
const isNormalFlowError = error => NORMAL_FLOW_ERRORS.has(error.code);
const [maj, min] = process.versions.node.split('.').slice(0, 2).map(n => Number.parseInt(n, 10));
const wantBigintFsStats = process.platform === 'win32' && (maj > 10 || (maj === 10 && min >= 5));
const normalizeFilter = filter => {
if (filter === undefined) return;
if (typeof filter === 'function') return filter;
if (typeof filter === 'string') {
const glob = picomatch(filter.trim());
return entry => glob(entry.basename);
}
if (Array.isArray(filter)) {
const positive = [];
const negative = [];
for (const item of filter) {
const trimmed = item.trim();
if (trimmed.charAt(0) === BANG) {
negative.push(picomatch(trimmed.slice(1)));
} else {
positive.push(picomatch(trimmed));
}
}
if (negative.length > 0) {
if (positive.length > 0) {
return entry =>
positive.some(f => f(entry.basename)) && !negative.some(f => f(entry.basename));
}
return entry => !negative.some(f => f(entry.basename));
}
return entry => positive.some(f => f(entry.basename));
}
};
class ReaddirpStream extends Readable {
static get defaultOptions() {
return {
root: '.',
/* eslint-disable no-unused-vars */
fileFilter: (path) => true,
directoryFilter: (path) => true,
/* eslint-enable no-unused-vars */
type: FILE_TYPE,
lstat: false,
depth: 2147483648,
alwaysStat: false
};
}
constructor(options = {}) {
super({
objectMode: true,
autoDestroy: true,
highWaterMark: options.highWaterMark || 4096
});
const opts = { ...ReaddirpStream.defaultOptions, ...options };
const { root, type } = opts;
this._fileFilter = normalizeFilter(opts.fileFilter);
this._directoryFilter = normalizeFilter(opts.directoryFilter);
const statMethod = opts.lstat ? lstat : stat;
// Use bigint stats if it's windows and stat() supports options (node 10+).
if (wantBigintFsStats) {
this._stat = path => statMethod(path, { bigint: true });
} else {
this._stat = statMethod;
}
this._maxDepth = opts.depth;
this._wantsDir = [DIR_TYPE, FILE_DIR_TYPE, EVERYTHING_TYPE].includes(type);
this._wantsFile = [FILE_TYPE, FILE_DIR_TYPE, EVERYTHING_TYPE].includes(type);
this._wantsEverything = type === EVERYTHING_TYPE;
this._root = sysPath.resolve(root);
this._isDirent = ('Dirent' in fs) && !opts.alwaysStat;
this._statsProp = this._isDirent ? 'dirent' : 'stats';
this._rdOptions = { encoding: 'utf8', withFileTypes: this._isDirent };
// Launch stream with one parent, the root dir.
this.parents = [this._exploreDir(root, 1)];
this.reading = false;
this.parent = undefined;
}
async _read(batch) {
if (this.reading) return;
this.reading = true;
try {
while (!this.destroyed && batch > 0) {
const { path, depth, files = [] } = this.parent || {};
if (files.length > 0) {
const slice = files.splice(0, batch).map(dirent => this._formatEntry(dirent, path));
for (const entry of await Promise.all(slice)) {
if (this.destroyed) return;
const entryType = await this._getEntryType(entry);
if (entryType === 'directory' && this._directoryFilter(entry)) {
if (depth <= this._maxDepth) {
this.parents.push(this._exploreDir(entry.fullPath, depth + 1));
}
if (this._wantsDir) {
this.push(entry);
batch--;
}
} else if ((entryType === 'file' || this._includeAsFile(entry)) && this._fileFilter(entry)) {
if (this._wantsFile) {
this.push(entry);
batch--;
}
}
}
} else {
const parent = this.parents.pop();
if (!parent) {
this.push(null);
break;
}
this.parent = await parent;
if (this.destroyed) return;
}
}
} catch (error) {
this.destroy(error);
} finally {
this.reading = false;
}
}
async _exploreDir(path, depth) {
let files;
try {
files = await readdir(path, this._rdOptions);
} catch (error) {
this._onError(error);
}
return { files, depth, path };
}
async _formatEntry(dirent, path) {
let entry;
try {
const basename = this._isDirent ? dirent.name : dirent;
const fullPath = sysPath.resolve(sysPath.join(path, basename));
entry = { path: sysPath.relative(this._root, fullPath), fullPath, basename };
entry[this._statsProp] = this._isDirent ? dirent : await this._stat(fullPath);
} catch (err) {
this._onError(err);
}
return entry;
}
_onError(err) {
if (isNormalFlowError(err) && !this.destroyed) {
this.emit('warn', err);
} else {
this.destroy(err);
}
}
async _getEntryType(entry) {
// entry may be undefined, because a warning or an error were emitted
// and the statsProp is undefined
const stats = entry && entry[this._statsProp];
if (!stats) {
return;
}
if (stats.isFile()) {
return 'file';
}
if (stats.isDirectory()) {
return 'directory';
}
if (stats && stats.isSymbolicLink()) {
const full = entry.fullPath;
try {
const entryRealPath = await realpath(full);
const entryRealPathStats = await lstat(entryRealPath);
if (entryRealPathStats.isFile()) {
return 'file';
}
if (entryRealPathStats.isDirectory()) {
const len = entryRealPath.length;
if (full.startsWith(entryRealPath) && full.substr(len, 1) === sysPath.sep) {
const recursiveError = new Error(
`Circular symlink detected: "${full}" points to "${entryRealPath}"`
);
recursiveError.code = RECURSIVE_ERROR_CODE;
return this._onError(recursiveError);
}
return 'directory';
}
} catch (error) {
this._onError(error);
}
}
}
_includeAsFile(entry) {
const stats = entry && entry[this._statsProp];
return stats && this._wantsEverything && !stats.isDirectory();
}
}
/**
* @typedef {Object} ReaddirpArguments
* @property {Function=} fileFilter
* @property {Function=} directoryFilter
* @property {String=} type
* @property {Number=} depth
* @property {String=} root
* @property {Boolean=} lstat
* @property {Boolean=} bigint
*/
/**
* Main function which ends up calling readdirRec and reads all files and directories in given root recursively.
* @param {String} root Root directory
* @param {ReaddirpArguments=} options Options to specify root (start directory), filters and recursion depth
*/
const readdirp = (root, options = {}) => {
let type = options.entryType || options.type;
if (type === 'both') type = FILE_DIR_TYPE; // backwards-compatibility
if (type) options.type = type;
if (!root) {
throw new Error('readdirp: root argument is required. Usage: readdirp(root, options)');
} else if (typeof root !== 'string') {
throw new TypeError('readdirp: root argument must be a string. Usage: readdirp(root, options)');
} else if (type && !ALL_TYPES.includes(type)) {
throw new Error(`readdirp: Invalid type passed. Use one of ${ALL_TYPES.join(', ')}`);
}
options.root = root;
return new ReaddirpStream(options);
};
const readdirpPromise = (root, options = {}) => {
return new Promise((resolve, reject) => {
const files = [];
readdirp(root, options)
.on('data', entry => files.push(entry))
.on('end', () => resolve(files))
.on('error', error => reject(error));
});
};
readdirp.promise = readdirpPromise;
readdirp.ReaddirpStream = ReaddirpStream;
readdirp.default = readdirp;
module.exports = readdirp;
Zerion Mini Shell 1.0