🐛 Update: Added support for the 'find' command in settings.local.json. Enhanced logging for various modules, including initialization and performance metrics. Improved SQLite database optimization and ensured better tracking of user interactions and system processes. 📚
This commit is contained in:
448
network-visualization/node_modules/graceful-fs/graceful-fs.js
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448
network-visualization/node_modules/graceful-fs/graceful-fs.js
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var fs = require('fs')
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var polyfills = require('./polyfills.js')
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var legacy = require('./legacy-streams.js')
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var clone = require('./clone.js')
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var util = require('util')
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/* istanbul ignore next - node 0.x polyfill */
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var gracefulQueue
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var previousSymbol
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/* istanbul ignore else - node 0.x polyfill */
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if (typeof Symbol === 'function' && typeof Symbol.for === 'function') {
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gracefulQueue = Symbol.for('graceful-fs.queue')
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// This is used in testing by future versions
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previousSymbol = Symbol.for('graceful-fs.previous')
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} else {
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gracefulQueue = '___graceful-fs.queue'
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previousSymbol = '___graceful-fs.previous'
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}
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function noop () {}
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function publishQueue(context, queue) {
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Object.defineProperty(context, gracefulQueue, {
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get: function() {
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return queue
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}
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})
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}
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var debug = noop
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if (util.debuglog)
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debug = util.debuglog('gfs4')
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else if (/\bgfs4\b/i.test(process.env.NODE_DEBUG || ''))
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debug = function() {
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var m = util.format.apply(util, arguments)
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m = 'GFS4: ' + m.split(/\n/).join('\nGFS4: ')
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console.error(m)
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}
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// Once time initialization
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if (!fs[gracefulQueue]) {
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// This queue can be shared by multiple loaded instances
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var queue = global[gracefulQueue] || []
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publishQueue(fs, queue)
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// Patch fs.close/closeSync to shared queue version, because we need
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// to retry() whenever a close happens *anywhere* in the program.
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// This is essential when multiple graceful-fs instances are
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// in play at the same time.
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fs.close = (function (fs$close) {
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function close (fd, cb) {
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return fs$close.call(fs, fd, function (err) {
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// This function uses the graceful-fs shared queue
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if (!err) {
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resetQueue()
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}
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if (typeof cb === 'function')
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cb.apply(this, arguments)
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})
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}
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Object.defineProperty(close, previousSymbol, {
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value: fs$close
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})
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return close
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})(fs.close)
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fs.closeSync = (function (fs$closeSync) {
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function closeSync (fd) {
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// This function uses the graceful-fs shared queue
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fs$closeSync.apply(fs, arguments)
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resetQueue()
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}
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Object.defineProperty(closeSync, previousSymbol, {
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value: fs$closeSync
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})
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return closeSync
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})(fs.closeSync)
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if (/\bgfs4\b/i.test(process.env.NODE_DEBUG || '')) {
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process.on('exit', function() {
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debug(fs[gracefulQueue])
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require('assert').equal(fs[gracefulQueue].length, 0)
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})
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}
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}
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if (!global[gracefulQueue]) {
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publishQueue(global, fs[gracefulQueue]);
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}
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module.exports = patch(clone(fs))
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if (process.env.TEST_GRACEFUL_FS_GLOBAL_PATCH && !fs.__patched) {
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module.exports = patch(fs)
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fs.__patched = true;
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}
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function patch (fs) {
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// Everything that references the open() function needs to be in here
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polyfills(fs)
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fs.gracefulify = patch
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fs.createReadStream = createReadStream
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fs.createWriteStream = createWriteStream
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var fs$readFile = fs.readFile
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fs.readFile = readFile
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function readFile (path, options, cb) {
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if (typeof options === 'function')
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cb = options, options = null
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return go$readFile(path, options, cb)
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function go$readFile (path, options, cb, startTime) {
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return fs$readFile(path, options, function (err) {
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if (err && (err.code === 'EMFILE' || err.code === 'ENFILE'))
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enqueue([go$readFile, [path, options, cb], err, startTime || Date.now(), Date.now()])
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else {
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if (typeof cb === 'function')
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cb.apply(this, arguments)
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}
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})
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}
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}
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var fs$writeFile = fs.writeFile
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fs.writeFile = writeFile
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function writeFile (path, data, options, cb) {
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if (typeof options === 'function')
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cb = options, options = null
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return go$writeFile(path, data, options, cb)
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function go$writeFile (path, data, options, cb, startTime) {
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return fs$writeFile(path, data, options, function (err) {
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if (err && (err.code === 'EMFILE' || err.code === 'ENFILE'))
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enqueue([go$writeFile, [path, data, options, cb], err, startTime || Date.now(), Date.now()])
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else {
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if (typeof cb === 'function')
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cb.apply(this, arguments)
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}
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})
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}
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}
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var fs$appendFile = fs.appendFile
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if (fs$appendFile)
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fs.appendFile = appendFile
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function appendFile (path, data, options, cb) {
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if (typeof options === 'function')
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cb = options, options = null
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return go$appendFile(path, data, options, cb)
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function go$appendFile (path, data, options, cb, startTime) {
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return fs$appendFile(path, data, options, function (err) {
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if (err && (err.code === 'EMFILE' || err.code === 'ENFILE'))
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enqueue([go$appendFile, [path, data, options, cb], err, startTime || Date.now(), Date.now()])
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else {
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if (typeof cb === 'function')
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cb.apply(this, arguments)
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}
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})
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}
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}
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var fs$copyFile = fs.copyFile
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if (fs$copyFile)
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fs.copyFile = copyFile
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function copyFile (src, dest, flags, cb) {
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if (typeof flags === 'function') {
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cb = flags
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flags = 0
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}
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return go$copyFile(src, dest, flags, cb)
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function go$copyFile (src, dest, flags, cb, startTime) {
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return fs$copyFile(src, dest, flags, function (err) {
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if (err && (err.code === 'EMFILE' || err.code === 'ENFILE'))
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enqueue([go$copyFile, [src, dest, flags, cb], err, startTime || Date.now(), Date.now()])
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else {
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if (typeof cb === 'function')
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cb.apply(this, arguments)
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}
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})
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}
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}
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var fs$readdir = fs.readdir
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fs.readdir = readdir
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var noReaddirOptionVersions = /^v[0-5]\./
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function readdir (path, options, cb) {
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if (typeof options === 'function')
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cb = options, options = null
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var go$readdir = noReaddirOptionVersions.test(process.version)
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? function go$readdir (path, options, cb, startTime) {
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return fs$readdir(path, fs$readdirCallback(
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path, options, cb, startTime
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))
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}
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: function go$readdir (path, options, cb, startTime) {
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return fs$readdir(path, options, fs$readdirCallback(
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path, options, cb, startTime
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))
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}
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return go$readdir(path, options, cb)
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function fs$readdirCallback (path, options, cb, startTime) {
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return function (err, files) {
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if (err && (err.code === 'EMFILE' || err.code === 'ENFILE'))
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enqueue([
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go$readdir,
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[path, options, cb],
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err,
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startTime || Date.now(),
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Date.now()
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])
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else {
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if (files && files.sort)
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files.sort()
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if (typeof cb === 'function')
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cb.call(this, err, files)
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}
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}
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}
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}
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if (process.version.substr(0, 4) === 'v0.8') {
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var legStreams = legacy(fs)
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ReadStream = legStreams.ReadStream
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WriteStream = legStreams.WriteStream
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}
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var fs$ReadStream = fs.ReadStream
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if (fs$ReadStream) {
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ReadStream.prototype = Object.create(fs$ReadStream.prototype)
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ReadStream.prototype.open = ReadStream$open
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}
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var fs$WriteStream = fs.WriteStream
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if (fs$WriteStream) {
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WriteStream.prototype = Object.create(fs$WriteStream.prototype)
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WriteStream.prototype.open = WriteStream$open
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}
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Object.defineProperty(fs, 'ReadStream', {
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get: function () {
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return ReadStream
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},
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set: function (val) {
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ReadStream = val
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},
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enumerable: true,
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configurable: true
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})
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Object.defineProperty(fs, 'WriteStream', {
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get: function () {
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return WriteStream
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},
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set: function (val) {
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WriteStream = val
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},
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enumerable: true,
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configurable: true
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})
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// legacy names
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var FileReadStream = ReadStream
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Object.defineProperty(fs, 'FileReadStream', {
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get: function () {
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return FileReadStream
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},
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set: function (val) {
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FileReadStream = val
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},
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enumerable: true,
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configurable: true
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})
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var FileWriteStream = WriteStream
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Object.defineProperty(fs, 'FileWriteStream', {
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get: function () {
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return FileWriteStream
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},
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set: function (val) {
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FileWriteStream = val
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},
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enumerable: true,
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configurable: true
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})
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function ReadStream (path, options) {
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if (this instanceof ReadStream)
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return fs$ReadStream.apply(this, arguments), this
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else
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return ReadStream.apply(Object.create(ReadStream.prototype), arguments)
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}
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function ReadStream$open () {
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var that = this
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open(that.path, that.flags, that.mode, function (err, fd) {
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if (err) {
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if (that.autoClose)
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that.destroy()
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that.emit('error', err)
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} else {
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that.fd = fd
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that.emit('open', fd)
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that.read()
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}
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})
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}
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function WriteStream (path, options) {
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if (this instanceof WriteStream)
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return fs$WriteStream.apply(this, arguments), this
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else
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return WriteStream.apply(Object.create(WriteStream.prototype), arguments)
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}
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function WriteStream$open () {
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var that = this
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open(that.path, that.flags, that.mode, function (err, fd) {
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if (err) {
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that.destroy()
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that.emit('error', err)
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} else {
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that.fd = fd
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that.emit('open', fd)
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}
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})
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}
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function createReadStream (path, options) {
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return new fs.ReadStream(path, options)
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}
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function createWriteStream (path, options) {
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return new fs.WriteStream(path, options)
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}
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var fs$open = fs.open
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fs.open = open
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function open (path, flags, mode, cb) {
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if (typeof mode === 'function')
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cb = mode, mode = null
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return go$open(path, flags, mode, cb)
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function go$open (path, flags, mode, cb, startTime) {
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return fs$open(path, flags, mode, function (err, fd) {
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if (err && (err.code === 'EMFILE' || err.code === 'ENFILE'))
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enqueue([go$open, [path, flags, mode, cb], err, startTime || Date.now(), Date.now()])
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else {
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if (typeof cb === 'function')
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cb.apply(this, arguments)
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}
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})
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}
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}
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return fs
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}
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function enqueue (elem) {
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debug('ENQUEUE', elem[0].name, elem[1])
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fs[gracefulQueue].push(elem)
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retry()
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}
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// keep track of the timeout between retry() calls
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var retryTimer
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// reset the startTime and lastTime to now
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// this resets the start of the 60 second overall timeout as well as the
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// delay between attempts so that we'll retry these jobs sooner
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function resetQueue () {
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var now = Date.now()
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for (var i = 0; i < fs[gracefulQueue].length; ++i) {
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// entries that are only a length of 2 are from an older version, don't
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// bother modifying those since they'll be retried anyway.
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if (fs[gracefulQueue][i].length > 2) {
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fs[gracefulQueue][i][3] = now // startTime
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fs[gracefulQueue][i][4] = now // lastTime
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}
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}
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// call retry to make sure we're actively processing the queue
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retry()
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}
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function retry () {
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// clear the timer and remove it to help prevent unintended concurrency
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clearTimeout(retryTimer)
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retryTimer = undefined
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if (fs[gracefulQueue].length === 0)
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return
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var elem = fs[gracefulQueue].shift()
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var fn = elem[0]
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var args = elem[1]
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// these items may be unset if they were added by an older graceful-fs
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var err = elem[2]
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var startTime = elem[3]
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var lastTime = elem[4]
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// if we don't have a startTime we have no way of knowing if we've waited
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// long enough, so go ahead and retry this item now
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if (startTime === undefined) {
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debug('RETRY', fn.name, args)
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fn.apply(null, args)
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} else if (Date.now() - startTime >= 60000) {
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// it's been more than 60 seconds total, bail now
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debug('TIMEOUT', fn.name, args)
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var cb = args.pop()
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if (typeof cb === 'function')
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cb.call(null, err)
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} else {
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// the amount of time between the last attempt and right now
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var sinceAttempt = Date.now() - lastTime
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// the amount of time between when we first tried, and when we last tried
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// rounded up to at least 1
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var sinceStart = Math.max(lastTime - startTime, 1)
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// backoff. wait longer than the total time we've been retrying, but only
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// up to a maximum of 100ms
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var desiredDelay = Math.min(sinceStart * 1.2, 100)
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// it's been long enough since the last retry, do it again
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if (sinceAttempt >= desiredDelay) {
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debug('RETRY', fn.name, args)
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fn.apply(null, args.concat([startTime]))
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} else {
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// if we can't do this job yet, push it to the end of the queue
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// and let the next iteration check again
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fs[gracefulQueue].push(elem)
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}
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}
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// schedule our next run if one isn't already scheduled
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if (retryTimer === undefined) {
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retryTimer = setTimeout(retry, 0)
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}
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}
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Reference in New Issue
Block a user