diff options
Diffstat (limited to 'deps/npm/node_modules/tar/lib/entry-writer.js')
-rw-r--r-- | deps/npm/node_modules/tar/lib/entry-writer.js | 166 |
1 files changed, 166 insertions, 0 deletions
diff --git a/deps/npm/node_modules/tar/lib/entry-writer.js b/deps/npm/node_modules/tar/lib/entry-writer.js new file mode 100644 index 00000000000..b8a87ea1312 --- /dev/null +++ b/deps/npm/node_modules/tar/lib/entry-writer.js @@ -0,0 +1,166 @@ +module.exports = EntryWriter + +var tar = require("../tar.js") + , TarHeader = require("./header.js") + , Entry = require("./entry.js") + , inherits = require("inherits") + , BlockStream = require("block-stream") + , ExtendedHeaderWriter + , Stream = require("stream").Stream + , EOF = {} + +inherits(EntryWriter, Stream) + +function EntryWriter (props) { + var me = this + + if (!(me instanceof EntryWriter)) { + return new EntryWriter(props) + } + + Stream.apply(this) + + me.writable = true + me.readable = true + + me._stream = new BlockStream(512) + + me._stream.on("data", function (c) { + me.emit("data", c) + }) + + me._stream.on("drain", function () { + me.emit("drain") + }) + + me._stream.on("end", function () { + me.emit("end") + me.emit("close") + }) + + me.props = props + if (props.type === "Directory") { + props.size = 0 + } + props.ustar = "ustar\0" + props.ustarver = "00" + me.path = props.path + + me._buffer = [] + me._didHeader = false + me._meta = false + + me.on("pipe", function () { + me._process() + }) +} + +EntryWriter.prototype.write = function (c) { + // console.error(".. ew write") + if (this._ended) return this.emit("error", new Error("write after end")) + this._buffer.push(c) + this._process() + this._needDrain = this._buffer.length > 0 + return !this._needDrain +} + +EntryWriter.prototype.end = function (c) { + // console.error(".. ew end") + if (c) this._buffer.push(c) + this._buffer.push(EOF) + this._ended = true + this._process() + this._needDrain = this._buffer.length > 0 +} + +EntryWriter.prototype.pause = function () { + // console.error(".. ew pause") + this._paused = true + this.emit("pause") +} + +EntryWriter.prototype.resume = function () { + // console.error(".. ew resume") + this._paused = false + this.emit("resume") + this._process() +} + +EntryWriter.prototype.add = function (entry) { + // console.error(".. ew add") + if (!this.parent) return this.emit("error", new Error("no parent")) + + // make sure that the _header and such is emitted, and clear out + // the _currentEntry link on the parent. + if (!this._ended) this.end() + + return this.parent.add(entry) +} + +EntryWriter.prototype._header = function () { + // console.error(".. ew header") + if (this._didHeader) return + this._didHeader = true + + var headerBlock = TarHeader.encode(this.props) + + if (this.props.needExtended && !this._meta) { + var me = this + + ExtendedHeaderWriter = ExtendedHeaderWriter || + require("./extended-header-writer.js") + + ExtendedHeaderWriter(this.props) + .on("data", function (c) { + me.emit("data", c) + }) + .end() + } + + // console.error(".. .. ew headerBlock emitting") + this.emit("data", headerBlock) + this.emit("header") +} + +EntryWriter.prototype._process = function () { + // console.error(".. .. ew process") + if (!this._didHeader && !this._meta) { + this._header() + } + + if (this._paused || this._processing) { + // console.error(".. .. .. paused=%j, processing=%j", this._paused, this._processing) + return + } + + this._processing = true + + var buf = this._buffer + for (var i = 0; i < buf.length; i ++) { + // console.error(".. .. .. i=%d", i) + + var c = buf[i] + + if (c === EOF) this._stream.end() + else this._stream.write(c) + + if (this._paused) { + // console.error(".. .. .. paused mid-emission") + this._processing = false + if (i < buf.length) { + this._needDrain = true + this._buffer = buf.slice(i + 1) + } + return + } + } + + // console.error(".. .. .. emitted") + this._buffer.length = 0 + this._processing = false + + // console.error(".. .. .. emitting drain") + this.emit("drain") +} + +EntryWriter.prototype.destroy = function () {} |