diff options
Diffstat (limited to 'node_modules/graceful-fs/graceful-fs.js')
| -rw-r--r-- | node_modules/graceful-fs/graceful-fs.js | 448 |
1 files changed, 0 insertions, 448 deletions
diff --git a/node_modules/graceful-fs/graceful-fs.js b/node_modules/graceful-fs/graceful-fs.js deleted file mode 100644 index 8d5b89e..0000000 --- a/node_modules/graceful-fs/graceful-fs.js +++ /dev/null @@ -1,448 +0,0 @@ -var fs = require('fs') -var polyfills = require('./polyfills.js') -var legacy = require('./legacy-streams.js') -var clone = require('./clone.js') - -var util = require('util') - -/* istanbul ignore next - node 0.x polyfill */ -var gracefulQueue -var previousSymbol - -/* istanbul ignore else - node 0.x polyfill */ -if (typeof Symbol === 'function' && typeof Symbol.for === 'function') { - gracefulQueue = Symbol.for('graceful-fs.queue') - // This is used in testing by future versions - previousSymbol = Symbol.for('graceful-fs.previous') -} else { - gracefulQueue = '___graceful-fs.queue' - previousSymbol = '___graceful-fs.previous' -} - -function noop () {} - -function publishQueue(context, queue) { - Object.defineProperty(context, gracefulQueue, { - get: function() { - return queue - } - }) -} - -var debug = noop -if (util.debuglog) - debug = util.debuglog('gfs4') -else if (/\bgfs4\b/i.test(process.env.NODE_DEBUG || '')) - debug = function() { - var m = util.format.apply(util, arguments) - m = 'GFS4: ' + m.split(/\n/).join('\nGFS4: ') - console.error(m) - } - -// Once time initialization -if (!fs[gracefulQueue]) { - // This queue can be shared by multiple loaded instances - var queue = global[gracefulQueue] || [] - publishQueue(fs, queue) - - // Patch fs.close/closeSync to shared queue version, because we need - // to retry() whenever a close happens *anywhere* in the program. - // This is essential when multiple graceful-fs instances are - // in play at the same time. - fs.close = (function (fs$close) { - function close (fd, cb) { - return fs$close.call(fs, fd, function (err) { - // This function uses the graceful-fs shared queue - if (!err) { - resetQueue() - } - - if (typeof cb === 'function') - cb.apply(this, arguments) - }) - } - - Object.defineProperty(close, previousSymbol, { - value: fs$close - }) - return close - })(fs.close) - - fs.closeSync = (function (fs$closeSync) { - function closeSync (fd) { - // This function uses the graceful-fs shared queue - fs$closeSync.apply(fs, arguments) - resetQueue() - } - - Object.defineProperty(closeSync, previousSymbol, { - value: fs$closeSync - }) - return closeSync - })(fs.closeSync) - - if (/\bgfs4\b/i.test(process.env.NODE_DEBUG || '')) { - process.on('exit', function() { - debug(fs[gracefulQueue]) - require('assert').equal(fs[gracefulQueue].length, 0) - }) - } -} - -if (!global[gracefulQueue]) { - publishQueue(global, fs[gracefulQueue]); -} - -module.exports = patch(clone(fs)) -if (process.env.TEST_GRACEFUL_FS_GLOBAL_PATCH && !fs.__patched) { - module.exports = patch(fs) - fs.__patched = true; -} - -function patch (fs) { - // Everything that references the open() function needs to be in here - polyfills(fs) - fs.gracefulify = patch - - fs.createReadStream = createReadStream - fs.createWriteStream = createWriteStream - var fs$readFile = fs.readFile - fs.readFile = readFile - function readFile (path, options, cb) { - if (typeof options === 'function') - cb = options, options = null - - return go$readFile(path, options, cb) - - function go$readFile (path, options, cb, startTime) { - return fs$readFile(path, options, function (err) { - if (err && (err.code === 'EMFILE' || err.code === 'ENFILE')) - enqueue([go$readFile, [path, options, cb], err, startTime || Date.now(), Date.now()]) - else { - if (typeof cb === 'function') - cb.apply(this, arguments) - } - }) - } - } - - var fs$writeFile = fs.writeFile - fs.writeFile = writeFile - function writeFile (path, data, options, cb) { - if (typeof options === 'function') - cb = options, options = null - - return go$writeFile(path, data, options, cb) - - function go$writeFile (path, data, options, cb, startTime) { - return fs$writeFile(path, data, options, function (err) { - if (err && (err.code === 'EMFILE' || err.code === 'ENFILE')) - enqueue([go$writeFile, [path, data, options, cb], err, startTime || Date.now(), Date.now()]) - else { - if (typeof cb === 'function') - cb.apply(this, arguments) - } - }) - } - } - - var fs$appendFile = fs.appendFile - if (fs$appendFile) - fs.appendFile = appendFile - function appendFile (path, data, options, cb) { - if (typeof options === 'function') - cb = options, options = null - - return go$appendFile(path, data, options, cb) - - function go$appendFile (path, data, options, cb, startTime) { - return fs$appendFile(path, data, options, function (err) { - if (err && (err.code === 'EMFILE' || err.code === 'ENFILE')) - enqueue([go$appendFile, [path, data, options, cb], err, startTime || Date.now(), Date.now()]) - else { - if (typeof cb === 'function') - cb.apply(this, arguments) - } - }) - } - } - - var fs$copyFile = fs.copyFile - if (fs$copyFile) - fs.copyFile = copyFile - function copyFile (src, dest, flags, cb) { - if (typeof flags === 'function') { - cb = flags - flags = 0 - } - return go$copyFile(src, dest, flags, cb) - - function go$copyFile (src, dest, flags, cb, startTime) { - return fs$copyFile(src, dest, flags, function (err) { - if (err && (err.code === 'EMFILE' || err.code === 'ENFILE')) - enqueue([go$copyFile, [src, dest, flags, cb], err, startTime || Date.now(), Date.now()]) - else { - if (typeof cb === 'function') - cb.apply(this, arguments) - } - }) - } - } - - var fs$readdir = fs.readdir - fs.readdir = readdir - var noReaddirOptionVersions = /^v[0-5]\./ - function readdir (path, options, cb) { - if (typeof options === 'function') - cb = options, options = null - - var go$readdir = noReaddirOptionVersions.test(process.version) - ? function go$readdir (path, options, cb, startTime) { - return fs$readdir(path, fs$readdirCallback( - path, options, cb, startTime - )) - } - : function go$readdir (path, options, cb, startTime) { - return fs$readdir(path, options, fs$readdirCallback( - path, options, cb, startTime - )) - } - - return go$readdir(path, options, cb) - - function fs$readdirCallback (path, options, cb, startTime) { - return function (err, files) { - if (err && (err.code === 'EMFILE' || err.code === 'ENFILE')) - enqueue([ - go$readdir, - [path, options, cb], - err, - startTime || Date.now(), - Date.now() - ]) - else { - if (files && files.sort) - files.sort() - - if (typeof cb === 'function') - cb.call(this, err, files) - } - } - } - } - - if (process.version.substr(0, 4) === 'v0.8') { - var legStreams = legacy(fs) - ReadStream = legStreams.ReadStream - WriteStream = legStreams.WriteStream - } - - var fs$ReadStream = fs.ReadStream - if (fs$ReadStream) { - ReadStream.prototype = Object.create(fs$ReadStream.prototype) - ReadStream.prototype.open = ReadStream$open - } - - var fs$WriteStream = fs.WriteStream - if (fs$WriteStream) { - WriteStream.prototype = Object.create(fs$WriteStream.prototype) - WriteStream.prototype.open = WriteStream$open - } - - Object.defineProperty(fs, 'ReadStream', { - get: function () { - return ReadStream - }, - set: function (val) { - ReadStream = val - }, - enumerable: true, - configurable: true - }) - Object.defineProperty(fs, 'WriteStream', { - get: function () { - return WriteStream - }, - set: function (val) { - WriteStream = val - }, - enumerable: true, - configurable: true - }) - - // legacy names - var FileReadStream = ReadStream - Object.defineProperty(fs, 'FileReadStream', { - get: function () { - return FileReadStream - }, - set: function (val) { - FileReadStream = val - }, - enumerable: true, - configurable: true - }) - var FileWriteStream = WriteStream - Object.defineProperty(fs, 'FileWriteStream', { - get: function () { - return FileWriteStream - }, - set: function (val) { - FileWriteStream = val - }, - enumerable: true, - configurable: true - }) - - function ReadStream (path, options) { - if (this instanceof ReadStream) - return fs$ReadStream.apply(this, arguments), this - else - return ReadStream.apply(Object.create(ReadStream.prototype), arguments) - } - - function ReadStream$open () { - var that = this - open(that.path, that.flags, that.mode, function (err, fd) { - if (err) { - if (that.autoClose) - that.destroy() - - that.emit('error', err) - } else { - that.fd = fd - that.emit('open', fd) - that.read() - } - }) - } - - function WriteStream (path, options) { - if (this instanceof WriteStream) - return fs$WriteStream.apply(this, arguments), this - else - return WriteStream.apply(Object.create(WriteStream.prototype), arguments) - } - - function WriteStream$open () { - var that = this - open(that.path, that.flags, that.mode, function (err, fd) { - if (err) { - that.destroy() - that.emit('error', err) - } else { - that.fd = fd - that.emit('open', fd) - } - }) - } - - function createReadStream (path, options) { - return new fs.ReadStream(path, options) - } - - function createWriteStream (path, options) { - return new fs.WriteStream(path, options) - } - - var fs$open = fs.open - fs.open = open - function open (path, flags, mode, cb) { - if (typeof mode === 'function') - cb = mode, mode = null - - return go$open(path, flags, mode, cb) - - function go$open (path, flags, mode, cb, startTime) { - return fs$open(path, flags, mode, function (err, fd) { - if (err && (err.code === 'EMFILE' || err.code === 'ENFILE')) - enqueue([go$open, [path, flags, mode, cb], err, startTime || Date.now(), Date.now()]) - else { - if (typeof cb === 'function') - cb.apply(this, arguments) - } - }) - } - } - - return fs -} - -function enqueue (elem) { - debug('ENQUEUE', elem[0].name, elem[1]) - fs[gracefulQueue].push(elem) - retry() -} - -// keep track of the timeout between retry() calls -var retryTimer - -// reset the startTime and lastTime to now -// this resets the start of the 60 second overall timeout as well as the -// delay between attempts so that we'll retry these jobs sooner -function resetQueue () { - var now = Date.now() - for (var i = 0; i < fs[gracefulQueue].length; ++i) { - // entries that are only a length of 2 are from an older version, don't - // bother modifying those since they'll be retried anyway. - if (fs[gracefulQueue][i].length > 2) { - fs[gracefulQueue][i][3] = now // startTime - fs[gracefulQueue][i][4] = now // lastTime - } - } - // call retry to make sure we're actively processing the queue - retry() -} - -function retry () { - // clear the timer and remove it to help prevent unintended concurrency - clearTimeout(retryTimer) - retryTimer = undefined - - if (fs[gracefulQueue].length === 0) - return - - var elem = fs[gracefulQueue].shift() - var fn = elem[0] - var args = elem[1] - // these items may be unset if they were added by an older graceful-fs - var err = elem[2] - var startTime = elem[3] - var lastTime = elem[4] - - // if we don't have a startTime we have no way of knowing if we've waited - // long enough, so go ahead and retry this item now - if (startTime === undefined) { - debug('RETRY', fn.name, args) - fn.apply(null, args) - } else if (Date.now() - startTime >= 60000) { - // it's been more than 60 seconds total, bail now - debug('TIMEOUT', fn.name, args) - var cb = args.pop() - if (typeof cb === 'function') - cb.call(null, err) - } else { - // the amount of time between the last attempt and right now - var sinceAttempt = Date.now() - lastTime - // the amount of time between when we first tried, and when we last tried - // rounded up to at least 1 - var sinceStart = Math.max(lastTime - startTime, 1) - // backoff. wait longer than the total time we've been retrying, but only - // up to a maximum of 100ms - var desiredDelay = Math.min(sinceStart * 1.2, 100) - // it's been long enough since the last retry, do it again - if (sinceAttempt >= desiredDelay) { - debug('RETRY', fn.name, args) - fn.apply(null, args.concat([startTime])) - } else { - // if we can't do this job yet, push it to the end of the queue - // and let the next iteration check again - fs[gracefulQueue].push(elem) - } - } - - // schedule our next run if one isn't already scheduled - if (retryTimer === undefined) { - retryTimer = setTimeout(retry, 0) - } -} |