629 lines
24 KiB
JavaScript
629 lines
24 KiB
JavaScript
import { watchFile, unwatchFile, watch as fs_watch } from 'fs';
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import { open, stat, lstat, realpath as fsrealpath } from 'fs/promises';
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import * as sysPath from 'path';
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import { type as osType } from 'os';
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export const STR_DATA = 'data';
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export const STR_END = 'end';
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export const STR_CLOSE = 'close';
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export const EMPTY_FN = () => { };
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export const IDENTITY_FN = (val) => val;
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const pl = process.platform;
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export const isWindows = pl === 'win32';
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export const isMacos = pl === 'darwin';
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export const isLinux = pl === 'linux';
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export const isIBMi = osType() === 'OS400';
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export const EVENTS = {
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ALL: 'all',
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READY: 'ready',
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ADD: 'add',
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CHANGE: 'change',
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ADD_DIR: 'addDir',
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UNLINK: 'unlink',
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UNLINK_DIR: 'unlinkDir',
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RAW: 'raw',
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ERROR: 'error',
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};
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const EV = EVENTS;
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const THROTTLE_MODE_WATCH = 'watch';
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const statMethods = { lstat, stat };
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const KEY_LISTENERS = 'listeners';
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const KEY_ERR = 'errHandlers';
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const KEY_RAW = 'rawEmitters';
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const HANDLER_KEYS = [KEY_LISTENERS, KEY_ERR, KEY_RAW];
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// prettier-ignore
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const binaryExtensions = new Set([
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'3dm', '3ds', '3g2', '3gp', '7z', 'a', 'aac', 'adp', 'afdesign', 'afphoto', 'afpub', 'ai',
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'aif', 'aiff', 'alz', 'ape', 'apk', 'appimage', 'ar', 'arj', 'asf', 'au', 'avi',
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'bak', 'baml', 'bh', 'bin', 'bk', 'bmp', 'btif', 'bz2', 'bzip2',
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'cab', 'caf', 'cgm', 'class', 'cmx', 'cpio', 'cr2', 'cur', 'dat', 'dcm', 'deb', 'dex', 'djvu',
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'dll', 'dmg', 'dng', 'doc', 'docm', 'docx', 'dot', 'dotm', 'dra', 'DS_Store', 'dsk', 'dts',
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'dtshd', 'dvb', 'dwg', 'dxf',
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'ecelp4800', 'ecelp7470', 'ecelp9600', 'egg', 'eol', 'eot', 'epub', 'exe',
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'f4v', 'fbs', 'fh', 'fla', 'flac', 'flatpak', 'fli', 'flv', 'fpx', 'fst', 'fvt',
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'g3', 'gh', 'gif', 'graffle', 'gz', 'gzip',
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'h261', 'h263', 'h264', 'icns', 'ico', 'ief', 'img', 'ipa', 'iso',
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'jar', 'jpeg', 'jpg', 'jpgv', 'jpm', 'jxr', 'key', 'ktx',
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'lha', 'lib', 'lvp', 'lz', 'lzh', 'lzma', 'lzo',
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'm3u', 'm4a', 'm4v', 'mar', 'mdi', 'mht', 'mid', 'midi', 'mj2', 'mka', 'mkv', 'mmr', 'mng',
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'mobi', 'mov', 'movie', 'mp3',
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'mp4', 'mp4a', 'mpeg', 'mpg', 'mpga', 'mxu',
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'nef', 'npx', 'numbers', 'nupkg',
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'o', 'odp', 'ods', 'odt', 'oga', 'ogg', 'ogv', 'otf', 'ott',
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'pages', 'pbm', 'pcx', 'pdb', 'pdf', 'pea', 'pgm', 'pic', 'png', 'pnm', 'pot', 'potm',
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'potx', 'ppa', 'ppam',
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'ppm', 'pps', 'ppsm', 'ppsx', 'ppt', 'pptm', 'pptx', 'psd', 'pya', 'pyc', 'pyo', 'pyv',
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'qt',
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'rar', 'ras', 'raw', 'resources', 'rgb', 'rip', 'rlc', 'rmf', 'rmvb', 'rpm', 'rtf', 'rz',
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's3m', 's7z', 'scpt', 'sgi', 'shar', 'snap', 'sil', 'sketch', 'slk', 'smv', 'snk', 'so',
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'stl', 'suo', 'sub', 'swf',
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'tar', 'tbz', 'tbz2', 'tga', 'tgz', 'thmx', 'tif', 'tiff', 'tlz', 'ttc', 'ttf', 'txz',
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'udf', 'uvh', 'uvi', 'uvm', 'uvp', 'uvs', 'uvu',
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'viv', 'vob',
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'war', 'wav', 'wax', 'wbmp', 'wdp', 'weba', 'webm', 'webp', 'whl', 'wim', 'wm', 'wma',
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'wmv', 'wmx', 'woff', 'woff2', 'wrm', 'wvx',
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'xbm', 'xif', 'xla', 'xlam', 'xls', 'xlsb', 'xlsm', 'xlsx', 'xlt', 'xltm', 'xltx', 'xm',
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'xmind', 'xpi', 'xpm', 'xwd', 'xz',
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'z', 'zip', 'zipx',
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]);
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const isBinaryPath = (filePath) => binaryExtensions.has(sysPath.extname(filePath).slice(1).toLowerCase());
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// TODO: emit errors properly. Example: EMFILE on Macos.
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const foreach = (val, fn) => {
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if (val instanceof Set) {
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val.forEach(fn);
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}
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else {
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fn(val);
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}
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};
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const addAndConvert = (main, prop, item) => {
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let container = main[prop];
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if (!(container instanceof Set)) {
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main[prop] = container = new Set([container]);
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}
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container.add(item);
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};
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const clearItem = (cont) => (key) => {
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const set = cont[key];
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if (set instanceof Set) {
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set.clear();
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}
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else {
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delete cont[key];
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}
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};
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const delFromSet = (main, prop, item) => {
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const container = main[prop];
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if (container instanceof Set) {
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container.delete(item);
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}
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else if (container === item) {
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delete main[prop];
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}
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};
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const isEmptySet = (val) => (val instanceof Set ? val.size === 0 : !val);
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const FsWatchInstances = new Map();
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/**
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* Instantiates the fs_watch interface
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* @param path to be watched
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* @param options to be passed to fs_watch
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* @param listener main event handler
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* @param errHandler emits info about errors
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* @param emitRaw emits raw event data
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* @returns {NativeFsWatcher}
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*/
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function createFsWatchInstance(path, options, listener, errHandler, emitRaw) {
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const handleEvent = (rawEvent, evPath) => {
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listener(path);
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emitRaw(rawEvent, evPath, { watchedPath: path });
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// emit based on events occurring for files from a directory's watcher in
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// case the file's watcher misses it (and rely on throttling to de-dupe)
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if (evPath && path !== evPath) {
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fsWatchBroadcast(sysPath.resolve(path, evPath), KEY_LISTENERS, sysPath.join(path, evPath));
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}
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};
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try {
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return fs_watch(path, {
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persistent: options.persistent,
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}, handleEvent);
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}
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catch (error) {
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errHandler(error);
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return undefined;
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}
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}
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/**
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* Helper for passing fs_watch event data to a collection of listeners
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* @param fullPath absolute path bound to fs_watch instance
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*/
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const fsWatchBroadcast = (fullPath, listenerType, val1, val2, val3) => {
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const cont = FsWatchInstances.get(fullPath);
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if (!cont)
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return;
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foreach(cont[listenerType], (listener) => {
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listener(val1, val2, val3);
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});
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};
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/**
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* Instantiates the fs_watch interface or binds listeners
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* to an existing one covering the same file system entry
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* @param path
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* @param fullPath absolute path
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* @param options to be passed to fs_watch
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* @param handlers container for event listener functions
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*/
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const setFsWatchListener = (path, fullPath, options, handlers) => {
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const { listener, errHandler, rawEmitter } = handlers;
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let cont = FsWatchInstances.get(fullPath);
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let watcher;
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if (!options.persistent) {
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watcher = createFsWatchInstance(path, options, listener, errHandler, rawEmitter);
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if (!watcher)
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return;
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return watcher.close.bind(watcher);
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}
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if (cont) {
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addAndConvert(cont, KEY_LISTENERS, listener);
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addAndConvert(cont, KEY_ERR, errHandler);
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addAndConvert(cont, KEY_RAW, rawEmitter);
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}
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else {
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watcher = createFsWatchInstance(path, options, fsWatchBroadcast.bind(null, fullPath, KEY_LISTENERS), errHandler, // no need to use broadcast here
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fsWatchBroadcast.bind(null, fullPath, KEY_RAW));
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if (!watcher)
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return;
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watcher.on(EV.ERROR, async (error) => {
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const broadcastErr = fsWatchBroadcast.bind(null, fullPath, KEY_ERR);
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if (cont)
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cont.watcherUnusable = true; // documented since Node 10.4.1
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// Workaround for https://github.com/joyent/node/issues/4337
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if (isWindows && error.code === 'EPERM') {
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try {
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const fd = await open(path, 'r');
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await fd.close();
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broadcastErr(error);
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}
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catch (err) {
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// do nothing
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}
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}
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else {
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broadcastErr(error);
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}
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});
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cont = {
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listeners: listener,
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errHandlers: errHandler,
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rawEmitters: rawEmitter,
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watcher,
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};
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FsWatchInstances.set(fullPath, cont);
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}
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// const index = cont.listeners.indexOf(listener);
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// removes this instance's listeners and closes the underlying fs_watch
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// instance if there are no more listeners left
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return () => {
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delFromSet(cont, KEY_LISTENERS, listener);
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delFromSet(cont, KEY_ERR, errHandler);
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delFromSet(cont, KEY_RAW, rawEmitter);
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if (isEmptySet(cont.listeners)) {
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// Check to protect against issue gh-730.
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// if (cont.watcherUnusable) {
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cont.watcher.close();
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// }
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FsWatchInstances.delete(fullPath);
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HANDLER_KEYS.forEach(clearItem(cont));
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// @ts-ignore
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cont.watcher = undefined;
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Object.freeze(cont);
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}
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};
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};
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// fs_watchFile helpers
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// object to hold per-process fs_watchFile instances
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// (may be shared across chokidar FSWatcher instances)
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const FsWatchFileInstances = new Map();
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/**
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* Instantiates the fs_watchFile interface or binds listeners
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* to an existing one covering the same file system entry
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* @param path to be watched
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* @param fullPath absolute path
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* @param options options to be passed to fs_watchFile
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* @param handlers container for event listener functions
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* @returns closer
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*/
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const setFsWatchFileListener = (path, fullPath, options, handlers) => {
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const { listener, rawEmitter } = handlers;
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let cont = FsWatchFileInstances.get(fullPath);
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// let listeners = new Set();
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// let rawEmitters = new Set();
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const copts = cont && cont.options;
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if (copts && (copts.persistent < options.persistent || copts.interval > options.interval)) {
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// "Upgrade" the watcher to persistence or a quicker interval.
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// This creates some unlikely edge case issues if the user mixes
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// settings in a very weird way, but solving for those cases
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// doesn't seem worthwhile for the added complexity.
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// listeners = cont.listeners;
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// rawEmitters = cont.rawEmitters;
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unwatchFile(fullPath);
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cont = undefined;
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}
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if (cont) {
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addAndConvert(cont, KEY_LISTENERS, listener);
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addAndConvert(cont, KEY_RAW, rawEmitter);
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}
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else {
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// TODO
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// listeners.add(listener);
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// rawEmitters.add(rawEmitter);
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cont = {
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listeners: listener,
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rawEmitters: rawEmitter,
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options,
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watcher: watchFile(fullPath, options, (curr, prev) => {
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foreach(cont.rawEmitters, (rawEmitter) => {
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rawEmitter(EV.CHANGE, fullPath, { curr, prev });
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});
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const currmtime = curr.mtimeMs;
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if (curr.size !== prev.size || currmtime > prev.mtimeMs || currmtime === 0) {
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foreach(cont.listeners, (listener) => listener(path, curr));
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}
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}),
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};
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FsWatchFileInstances.set(fullPath, cont);
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}
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// const index = cont.listeners.indexOf(listener);
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// Removes this instance's listeners and closes the underlying fs_watchFile
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// instance if there are no more listeners left.
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return () => {
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delFromSet(cont, KEY_LISTENERS, listener);
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delFromSet(cont, KEY_RAW, rawEmitter);
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if (isEmptySet(cont.listeners)) {
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FsWatchFileInstances.delete(fullPath);
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unwatchFile(fullPath);
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cont.options = cont.watcher = undefined;
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Object.freeze(cont);
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}
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};
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};
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/**
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* @mixin
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*/
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export class NodeFsHandler {
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constructor(fsW) {
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this.fsw = fsW;
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this._boundHandleError = (error) => fsW._handleError(error);
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}
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/**
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* Watch file for changes with fs_watchFile or fs_watch.
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* @param path to file or dir
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* @param listener on fs change
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* @returns closer for the watcher instance
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*/
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_watchWithNodeFs(path, listener) {
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const opts = this.fsw.options;
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const directory = sysPath.dirname(path);
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const basename = sysPath.basename(path);
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const parent = this.fsw._getWatchedDir(directory);
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parent.add(basename);
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const absolutePath = sysPath.resolve(path);
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const options = {
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persistent: opts.persistent,
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};
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if (!listener)
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listener = EMPTY_FN;
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let closer;
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if (opts.usePolling) {
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const enableBin = opts.interval !== opts.binaryInterval;
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options.interval = enableBin && isBinaryPath(basename) ? opts.binaryInterval : opts.interval;
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closer = setFsWatchFileListener(path, absolutePath, options, {
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listener,
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rawEmitter: this.fsw._emitRaw,
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});
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}
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else {
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closer = setFsWatchListener(path, absolutePath, options, {
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listener,
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errHandler: this._boundHandleError,
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rawEmitter: this.fsw._emitRaw,
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});
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}
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return closer;
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}
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/**
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* Watch a file and emit add event if warranted.
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* @returns closer for the watcher instance
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*/
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_handleFile(file, stats, initialAdd) {
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if (this.fsw.closed) {
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return;
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}
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const dirname = sysPath.dirname(file);
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const basename = sysPath.basename(file);
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const parent = this.fsw._getWatchedDir(dirname);
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// stats is always present
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let prevStats = stats;
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// if the file is already being watched, do nothing
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if (parent.has(basename))
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return;
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const listener = async (path, newStats) => {
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if (!this.fsw._throttle(THROTTLE_MODE_WATCH, file, 5))
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return;
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if (!newStats || newStats.mtimeMs === 0) {
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try {
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const newStats = await stat(file);
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if (this.fsw.closed)
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return;
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// Check that change event was not fired because of changed only accessTime.
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const at = newStats.atimeMs;
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const mt = newStats.mtimeMs;
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if (!at || at <= mt || mt !== prevStats.mtimeMs) {
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this.fsw._emit(EV.CHANGE, file, newStats);
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}
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if ((isMacos || isLinux) && prevStats.ino !== newStats.ino) {
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this.fsw._closeFile(path);
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prevStats = newStats;
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const closer = this._watchWithNodeFs(file, listener);
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if (closer)
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this.fsw._addPathCloser(path, closer);
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}
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else {
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prevStats = newStats;
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}
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}
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catch (error) {
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// Fix issues where mtime is null but file is still present
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this.fsw._remove(dirname, basename);
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}
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// add is about to be emitted if file not already tracked in parent
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}
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else if (parent.has(basename)) {
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// Check that change event was not fired because of changed only accessTime.
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const at = newStats.atimeMs;
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const mt = newStats.mtimeMs;
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if (!at || at <= mt || mt !== prevStats.mtimeMs) {
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this.fsw._emit(EV.CHANGE, file, newStats);
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}
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prevStats = newStats;
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}
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};
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// kick off the watcher
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const closer = this._watchWithNodeFs(file, listener);
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// emit an add event if we're supposed to
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if (!(initialAdd && this.fsw.options.ignoreInitial) && this.fsw._isntIgnored(file)) {
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if (!this.fsw._throttle(EV.ADD, file, 0))
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return;
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this.fsw._emit(EV.ADD, file, stats);
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}
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return closer;
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}
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/**
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* Handle symlinks encountered while reading a dir.
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|
* @param entry returned by readdirp
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|
* @param directory path of dir being read
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* @param path of this item
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* @param item basename of this item
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* @returns true if no more processing is needed for this entry.
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*/
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async _handleSymlink(entry, directory, path, item) {
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if (this.fsw.closed) {
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return;
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}
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const full = entry.fullPath;
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const dir = this.fsw._getWatchedDir(directory);
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if (!this.fsw.options.followSymlinks) {
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// watch symlink directly (don't follow) and detect changes
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this.fsw._incrReadyCount();
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let linkPath;
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try {
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linkPath = await fsrealpath(path);
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}
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catch (e) {
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this.fsw._emitReady();
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return true;
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}
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if (this.fsw.closed)
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return;
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if (dir.has(item)) {
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if (this.fsw._symlinkPaths.get(full) !== linkPath) {
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this.fsw._symlinkPaths.set(full, linkPath);
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this.fsw._emit(EV.CHANGE, path, entry.stats);
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}
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}
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else {
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dir.add(item);
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this.fsw._symlinkPaths.set(full, linkPath);
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this.fsw._emit(EV.ADD, path, entry.stats);
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}
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this.fsw._emitReady();
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return true;
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}
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// don't follow the same symlink more than once
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if (this.fsw._symlinkPaths.has(full)) {
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return true;
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}
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this.fsw._symlinkPaths.set(full, true);
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}
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_handleRead(directory, initialAdd, wh, target, dir, depth, throttler) {
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// Normalize the directory name on Windows
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directory = sysPath.join(directory, '');
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throttler = this.fsw._throttle('readdir', directory, 1000);
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if (!throttler)
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return;
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const previous = this.fsw._getWatchedDir(wh.path);
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const current = new Set();
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let stream = this.fsw._readdirp(directory, {
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fileFilter: (entry) => wh.filterPath(entry),
|
|
directoryFilter: (entry) => wh.filterDir(entry),
|
|
});
|
|
if (!stream)
|
|
return;
|
|
stream
|
|
.on(STR_DATA, async (entry) => {
|
|
if (this.fsw.closed) {
|
|
stream = undefined;
|
|
return;
|
|
}
|
|
const item = entry.path;
|
|
let path = sysPath.join(directory, item);
|
|
current.add(item);
|
|
if (entry.stats.isSymbolicLink() &&
|
|
(await this._handleSymlink(entry, directory, path, item))) {
|
|
return;
|
|
}
|
|
if (this.fsw.closed) {
|
|
stream = undefined;
|
|
return;
|
|
}
|
|
// Files that present in current directory snapshot
|
|
// but absent in previous are added to watch list and
|
|
// emit `add` event.
|
|
if (item === target || (!target && !previous.has(item))) {
|
|
this.fsw._incrReadyCount();
|
|
// ensure relativeness of path is preserved in case of watcher reuse
|
|
path = sysPath.join(dir, sysPath.relative(dir, path));
|
|
this._addToNodeFs(path, initialAdd, wh, depth + 1);
|
|
}
|
|
})
|
|
.on(EV.ERROR, this._boundHandleError);
|
|
return new Promise((resolve, reject) => {
|
|
if (!stream)
|
|
return reject();
|
|
stream.once(STR_END, () => {
|
|
if (this.fsw.closed) {
|
|
stream = undefined;
|
|
return;
|
|
}
|
|
const wasThrottled = throttler ? throttler.clear() : false;
|
|
resolve(undefined);
|
|
// Files that absent in current directory snapshot
|
|
// but present in previous emit `remove` event
|
|
// and are removed from @watched[directory].
|
|
previous
|
|
.getChildren()
|
|
.filter((item) => {
|
|
return item !== directory && !current.has(item);
|
|
})
|
|
.forEach((item) => {
|
|
this.fsw._remove(directory, item);
|
|
});
|
|
stream = undefined;
|
|
// one more time for any missed in case changes came in extremely quickly
|
|
if (wasThrottled)
|
|
this._handleRead(directory, false, wh, target, dir, depth, throttler);
|
|
});
|
|
});
|
|
}
|
|
/**
|
|
* Read directory to add / remove files from `@watched` list and re-read it on change.
|
|
* @param dir fs path
|
|
* @param stats
|
|
* @param initialAdd
|
|
* @param depth relative to user-supplied path
|
|
* @param target child path targeted for watch
|
|
* @param wh Common watch helpers for this path
|
|
* @param realpath
|
|
* @returns closer for the watcher instance.
|
|
*/
|
|
async _handleDir(dir, stats, initialAdd, depth, target, wh, realpath) {
|
|
const parentDir = this.fsw._getWatchedDir(sysPath.dirname(dir));
|
|
const tracked = parentDir.has(sysPath.basename(dir));
|
|
if (!(initialAdd && this.fsw.options.ignoreInitial) && !target && !tracked) {
|
|
this.fsw._emit(EV.ADD_DIR, dir, stats);
|
|
}
|
|
// ensure dir is tracked (harmless if redundant)
|
|
parentDir.add(sysPath.basename(dir));
|
|
this.fsw._getWatchedDir(dir);
|
|
let throttler;
|
|
let closer;
|
|
const oDepth = this.fsw.options.depth;
|
|
if ((oDepth == null || depth <= oDepth) && !this.fsw._symlinkPaths.has(realpath)) {
|
|
if (!target) {
|
|
await this._handleRead(dir, initialAdd, wh, target, dir, depth, throttler);
|
|
if (this.fsw.closed)
|
|
return;
|
|
}
|
|
closer = this._watchWithNodeFs(dir, (dirPath, stats) => {
|
|
// if current directory is removed, do nothing
|
|
if (stats && stats.mtimeMs === 0)
|
|
return;
|
|
this._handleRead(dirPath, false, wh, target, dir, depth, throttler);
|
|
});
|
|
}
|
|
return closer;
|
|
}
|
|
/**
|
|
* Handle added file, directory, or glob pattern.
|
|
* Delegates call to _handleFile / _handleDir after checks.
|
|
* @param path to file or ir
|
|
* @param initialAdd was the file added at watch instantiation?
|
|
* @param priorWh depth relative to user-supplied path
|
|
* @param depth Child path actually targeted for watch
|
|
* @param target Child path actually targeted for watch
|
|
*/
|
|
async _addToNodeFs(path, initialAdd, priorWh, depth, target) {
|
|
const ready = this.fsw._emitReady;
|
|
if (this.fsw._isIgnored(path) || this.fsw.closed) {
|
|
ready();
|
|
return false;
|
|
}
|
|
const wh = this.fsw._getWatchHelpers(path);
|
|
if (priorWh) {
|
|
wh.filterPath = (entry) => priorWh.filterPath(entry);
|
|
wh.filterDir = (entry) => priorWh.filterDir(entry);
|
|
}
|
|
// evaluate what is at the path we're being asked to watch
|
|
try {
|
|
const stats = await statMethods[wh.statMethod](wh.watchPath);
|
|
if (this.fsw.closed)
|
|
return;
|
|
if (this.fsw._isIgnored(wh.watchPath, stats)) {
|
|
ready();
|
|
return false;
|
|
}
|
|
const follow = this.fsw.options.followSymlinks;
|
|
let closer;
|
|
if (stats.isDirectory()) {
|
|
const absPath = sysPath.resolve(path);
|
|
const targetPath = follow ? await fsrealpath(path) : path;
|
|
if (this.fsw.closed)
|
|
return;
|
|
closer = await this._handleDir(wh.watchPath, stats, initialAdd, depth, target, wh, targetPath);
|
|
if (this.fsw.closed)
|
|
return;
|
|
// preserve this symlink's target path
|
|
if (absPath !== targetPath && targetPath !== undefined) {
|
|
this.fsw._symlinkPaths.set(absPath, targetPath);
|
|
}
|
|
}
|
|
else if (stats.isSymbolicLink()) {
|
|
const targetPath = follow ? await fsrealpath(path) : path;
|
|
if (this.fsw.closed)
|
|
return;
|
|
const parent = sysPath.dirname(wh.watchPath);
|
|
this.fsw._getWatchedDir(parent).add(wh.watchPath);
|
|
this.fsw._emit(EV.ADD, wh.watchPath, stats);
|
|
closer = await this._handleDir(parent, stats, initialAdd, depth, path, wh, targetPath);
|
|
if (this.fsw.closed)
|
|
return;
|
|
// preserve this symlink's target path
|
|
if (targetPath !== undefined) {
|
|
this.fsw._symlinkPaths.set(sysPath.resolve(path), targetPath);
|
|
}
|
|
}
|
|
else {
|
|
closer = this._handleFile(wh.watchPath, stats, initialAdd);
|
|
}
|
|
ready();
|
|
if (closer)
|
|
this.fsw._addPathCloser(path, closer);
|
|
return false;
|
|
}
|
|
catch (error) {
|
|
if (this.fsw._handleError(error)) {
|
|
ready();
|
|
return path;
|
|
}
|
|
}
|
|
}
|
|
}
|
|
//# sourceMappingURL=handler.js.map
|