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author | Florian Dold <florian.dold@gmail.com> | 2016-10-10 03:43:44 +0200 |
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committer | Florian Dold <florian.dold@gmail.com> | 2016-10-10 03:43:44 +0200 |
commit | abd94a7f5a50f43c797a11b53549ae48fff667c3 (patch) | |
tree | ab8ed457f65cdd72e13e0571d2975729428f1551 /node_modules/graceful-fs/graceful-fs.js | |
parent | a0247c6a3fd6a09a41a7e35a3441324c4dcb58be (diff) | |
download | wallet-core-abd94a7f5a50f43c797a11b53549ae48fff667c3.tar.xz |
add node_modules to address #4364
Diffstat (limited to 'node_modules/graceful-fs/graceful-fs.js')
-rw-r--r-- | node_modules/graceful-fs/graceful-fs.js | 262 |
1 files changed, 262 insertions, 0 deletions
diff --git a/node_modules/graceful-fs/graceful-fs.js b/node_modules/graceful-fs/graceful-fs.js new file mode 100644 index 000000000..33b30d2e9 --- /dev/null +++ b/node_modules/graceful-fs/graceful-fs.js @@ -0,0 +1,262 @@ +var fs = require('fs') +var polyfills = require('./polyfills.js') +var legacy = require('./legacy-streams.js') +var queue = [] + +var util = require('util') + +function noop () {} + +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) + } + +if (/\bgfs4\b/i.test(process.env.NODE_DEBUG || '')) { + process.on('exit', function() { + debug(queue) + require('assert').equal(queue.length, 0) + }) +} + +module.exports = patch(require('./fs.js')) +if (process.env.TEST_GRACEFUL_FS_GLOBAL_PATCH) { + module.exports = patch(fs) +} + +// Always patch fs.close/closeSync, because we want 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. +module.exports.close = +fs.close = (function (fs$close) { return function (fd, cb) { + return fs$close.call(fs, fd, function (err) { + if (!err) + retry() + + if (typeof cb === 'function') + cb.apply(this, arguments) + }) +}})(fs.close) + +module.exports.closeSync = +fs.closeSync = (function (fs$closeSync) { return function (fd) { + // Note that graceful-fs also retries when fs.closeSync() fails. + // Looks like a bug to me, although it's probably a harmless one. + var rval = fs$closeSync.apply(fs, arguments) + retry() + return rval +}})(fs.closeSync) + +function patch (fs) { + // Everything that references the open() function needs to be in here + polyfills(fs) + fs.gracefulify = patch + fs.FileReadStream = ReadStream; // Legacy name. + fs.FileWriteStream = WriteStream; // Legacy name. + 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$readFile (path, options, cb) { + return fs$readFile(path, options, function (err) { + if (err && (err.code === 'EMFILE' || err.code === 'ENFILE')) + enqueue([go$readFile, [path, options, cb]]) + else { + if (typeof cb === 'function') + cb.apply(this, arguments) + retry() + } + }) + } + } + + var fs$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) { + return fs$writeFile(path, data, options, function (err) { + if (err && (err.code === 'EMFILE' || err.code === 'ENFILE')) + enqueue([go$writeFile, [path, data, options, cb]]) + else { + if (typeof cb === 'function') + cb.apply(this, arguments) + retry() + } + }) + } + } + + 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) { + return fs$appendFile(path, data, options, function (err) { + if (err && (err.code === 'EMFILE' || err.code === 'ENFILE')) + enqueue([go$appendFile, [path, data, options, cb]]) + else { + if (typeof cb === 'function') + cb.apply(this, arguments) + retry() + } + }) + } + } + + var fs$readdir = fs.readdir + fs.readdir = readdir + function readdir (path, options, cb) { + var args = [path] + if (typeof options !== 'function') { + args.push(options) + } else { + cb = options + } + args.push(go$readdir$cb) + + return go$readdir(args) + + function go$readdir$cb (err, files) { + if (files && files.sort) + files.sort() + + if (err && (err.code === 'EMFILE' || err.code === 'ENFILE')) + enqueue([go$readdir, [args]]) + else { + if (typeof cb === 'function') + cb.apply(this, arguments) + retry() + } + } + } + + function go$readdir (args) { + return fs$readdir.apply(fs, args) + } + + if (process.version.substr(0, 4) === 'v0.8') { + var legStreams = legacy(fs) + ReadStream = legStreams.ReadStream + WriteStream = legStreams.WriteStream + } + + var fs$ReadStream = fs.ReadStream + ReadStream.prototype = Object.create(fs$ReadStream.prototype) + ReadStream.prototype.open = ReadStream$open + + var fs$WriteStream = fs.WriteStream + WriteStream.prototype = Object.create(fs$WriteStream.prototype) + WriteStream.prototype.open = WriteStream$open + + fs.ReadStream = ReadStream + fs.WriteStream = WriteStream + + function ReadStream (path, options) { + if (this instanceof ReadStream) + return fs$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$open () { + var that = this + open(that.path, that.flags, that.mode, function (err, fd) { + if (err) { + that.destroy() + that.emit('error', err) + } else { + that.fd = fd + that.emit('open', fd) + } + }) + } + + function createReadStream (path, options) { + return new ReadStream(path, options) + } + + function createWriteStream (path, options) { + return new WriteStream(path, options) + } + + var fs$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) { + return fs$open(path, flags, mode, function (err, fd) { + if (err && (err.code === 'EMFILE' || err.code === 'ENFILE')) + enqueue([go$open, [path, flags, mode, cb]]) + else { + if (typeof cb === 'function') + cb.apply(this, arguments) + retry() + } + }) + } + } + + return fs +} + +function enqueue (elem) { + debug('ENQUEUE', elem[0].name, elem[1]) + queue.push(elem) +} + +function retry () { + var elem = queue.shift() + if (elem) { + debug('RETRY', elem[0].name, elem[1]) + elem[0].apply(null, elem[1]) + } +} |