diff options
Diffstat (limited to 'node_modules/tar-stream/extract.js')
| -rw-r--r-- | node_modules/tar-stream/extract.js | 257 |
1 files changed, 0 insertions, 257 deletions
diff --git a/node_modules/tar-stream/extract.js b/node_modules/tar-stream/extract.js deleted file mode 100644 index 1a2a4450e..000000000 --- a/node_modules/tar-stream/extract.js +++ /dev/null @@ -1,257 +0,0 @@ -var util = require('util') -var bl = require('bl') -var headers = require('./headers') - -var Writable = require('readable-stream').Writable -var PassThrough = require('readable-stream').PassThrough - -var noop = function () {} - -var overflow = function (size) { - size &= 511 - return size && 512 - size -} - -var emptyStream = function (self, offset) { - var s = new Source(self, offset) - s.end() - return s -} - -var mixinPax = function (header, pax) { - if (pax.path) header.name = pax.path - if (pax.linkpath) header.linkname = pax.linkpath - if (pax.size) header.size = parseInt(pax.size, 10) - header.pax = pax - return header -} - -var Source = function (self, offset) { - this._parent = self - this.offset = offset - PassThrough.call(this) -} - -util.inherits(Source, PassThrough) - -Source.prototype.destroy = function (err) { - this._parent.destroy(err) -} - -var Extract = function (opts) { - if (!(this instanceof Extract)) return new Extract(opts) - Writable.call(this, opts) - - opts = opts || {} - - this._offset = 0 - this._buffer = bl() - this._missing = 0 - this._partial = false - this._onparse = noop - this._header = null - this._stream = null - this._overflow = null - this._cb = null - this._locked = false - this._destroyed = false - this._pax = null - this._paxGlobal = null - this._gnuLongPath = null - this._gnuLongLinkPath = null - - var self = this - var b = self._buffer - - var oncontinue = function () { - self._continue() - } - - var onunlock = function (err) { - self._locked = false - if (err) return self.destroy(err) - if (!self._stream) oncontinue() - } - - var onstreamend = function () { - self._stream = null - var drain = overflow(self._header.size) - if (drain) self._parse(drain, ondrain) - else self._parse(512, onheader) - if (!self._locked) oncontinue() - } - - var ondrain = function () { - self._buffer.consume(overflow(self._header.size)) - self._parse(512, onheader) - oncontinue() - } - - var onpaxglobalheader = function () { - var size = self._header.size - self._paxGlobal = headers.decodePax(b.slice(0, size)) - b.consume(size) - onstreamend() - } - - var onpaxheader = function () { - var size = self._header.size - self._pax = headers.decodePax(b.slice(0, size)) - if (self._paxGlobal) self._pax = Object.assign({}, self._paxGlobal, self._pax) - b.consume(size) - onstreamend() - } - - var ongnulongpath = function () { - var size = self._header.size - this._gnuLongPath = headers.decodeLongPath(b.slice(0, size), opts.filenameEncoding) - b.consume(size) - onstreamend() - } - - var ongnulonglinkpath = function () { - var size = self._header.size - this._gnuLongLinkPath = headers.decodeLongPath(b.slice(0, size), opts.filenameEncoding) - b.consume(size) - onstreamend() - } - - var onheader = function () { - var offset = self._offset - var header - try { - header = self._header = headers.decode(b.slice(0, 512), opts.filenameEncoding) - } catch (err) { - self.emit('error', err) - } - b.consume(512) - - if (!header) { - self._parse(512, onheader) - oncontinue() - return - } - if (header.type === 'gnu-long-path') { - self._parse(header.size, ongnulongpath) - oncontinue() - return - } - if (header.type === 'gnu-long-link-path') { - self._parse(header.size, ongnulonglinkpath) - oncontinue() - return - } - if (header.type === 'pax-global-header') { - self._parse(header.size, onpaxglobalheader) - oncontinue() - return - } - if (header.type === 'pax-header') { - self._parse(header.size, onpaxheader) - oncontinue() - return - } - - if (self._gnuLongPath) { - header.name = self._gnuLongPath - self._gnuLongPath = null - } - - if (self._gnuLongLinkPath) { - header.linkname = self._gnuLongLinkPath - self._gnuLongLinkPath = null - } - - if (self._pax) { - self._header = header = mixinPax(header, self._pax) - self._pax = null - } - - self._locked = true - - if (!header.size || header.type === 'directory') { - self._parse(512, onheader) - self.emit('entry', header, emptyStream(self, offset), onunlock) - return - } - - self._stream = new Source(self, offset) - - self.emit('entry', header, self._stream, onunlock) - self._parse(header.size, onstreamend) - oncontinue() - } - - this._onheader = onheader - this._parse(512, onheader) -} - -util.inherits(Extract, Writable) - -Extract.prototype.destroy = function (err) { - if (this._destroyed) return - this._destroyed = true - - if (err) this.emit('error', err) - this.emit('close') - if (this._stream) this._stream.emit('close') -} - -Extract.prototype._parse = function (size, onparse) { - if (this._destroyed) return - this._offset += size - this._missing = size - if (onparse === this._onheader) this._partial = false - this._onparse = onparse -} - -Extract.prototype._continue = function () { - if (this._destroyed) return - var cb = this._cb - this._cb = noop - if (this._overflow) this._write(this._overflow, undefined, cb) - else cb() -} - -Extract.prototype._write = function (data, enc, cb) { - if (this._destroyed) return - - var s = this._stream - var b = this._buffer - var missing = this._missing - if (data.length) this._partial = true - - // we do not reach end-of-chunk now. just forward it - - if (data.length < missing) { - this._missing -= data.length - this._overflow = null - if (s) return s.write(data, cb) - b.append(data) - return cb() - } - - // end-of-chunk. the parser should call cb. - - this._cb = cb - this._missing = 0 - - var overflow = null - if (data.length > missing) { - overflow = data.slice(missing) - data = data.slice(0, missing) - } - - if (s) s.end(data) - else b.append(data) - - this._overflow = overflow - this._onparse() -} - -Extract.prototype._final = function (cb) { - if (this._partial) return this.destroy(new Error('Unexpected end of data')) - cb() -} - -module.exports = Extract |