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94 lines
2.5 KiB
94 lines
2.5 KiB
// give it a tarball and a path, and it'll dump the contents |
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module.exports = Extract |
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var tar = require("../tar.js") |
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, fstream = require("fstream") |
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, inherits = require("inherits") |
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, path = require("path") |
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function Extract (opts) { |
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if (!(this instanceof Extract)) return new Extract(opts) |
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tar.Parse.apply(this) |
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if (typeof opts !== "object") { |
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opts = { path: opts } |
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} |
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// better to drop in cwd? seems more standard. |
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opts.path = opts.path || path.resolve("node-tar-extract") |
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opts.type = "Directory" |
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opts.Directory = true |
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// similar to --strip or --strip-components |
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opts.strip = +opts.strip |
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if (!opts.strip || opts.strip <= 0) opts.strip = 0 |
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this._fst = fstream.Writer(opts) |
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this.pause() |
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var me = this |
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// Hardlinks in tarballs are relative to the root |
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// of the tarball. So, they need to be resolved against |
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// the target directory in order to be created properly. |
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me.on("entry", function (entry) { |
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// if there's a "strip" argument, then strip off that many |
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// path components. |
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if (opts.strip) { |
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var p = entry.path.split("/").slice(opts.strip).join("/") |
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entry.path = entry.props.path = p |
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if (entry.linkpath) { |
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var lp = entry.linkpath.split("/").slice(opts.strip).join("/") |
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entry.linkpath = entry.props.linkpath = lp |
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} |
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} |
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if (entry.type === "Link") { |
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entry.linkpath = entry.props.linkpath = |
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path.join(opts.path, path.join("/", entry.props.linkpath)) |
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} |
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if (entry.type === "SymbolicLink") { |
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var dn = path.dirname(entry.path) || "" |
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var linkpath = entry.props.linkpath |
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var target = path.resolve(opts.path, dn, linkpath) |
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if (target.indexOf(opts.path) !== 0) { |
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linkpath = path.join(opts.path, path.join("/", linkpath)) |
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} |
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entry.linkpath = entry.props.linkpath = linkpath |
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} |
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}) |
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this._fst.on("ready", function () { |
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me.pipe(me._fst, { end: false }) |
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me.resume() |
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}) |
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this._fst.on('error', function(err) { |
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me.emit('error', err) |
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}) |
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this._fst.on('drain', function() { |
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me.emit('drain') |
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}) |
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// this._fst.on("end", function () { |
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// console.error("\nEEEE Extract End", me._fst.path) |
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// }) |
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this._fst.on("close", function () { |
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// console.error("\nEEEE Extract End", me._fst.path) |
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me.emit("finish") |
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me.emit("end") |
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me.emit("close") |
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}) |
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} |
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inherits(Extract, tar.Parse) |
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Extract.prototype._streamEnd = function () { |
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var me = this |
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if (!me._ended || me._entry) me.error("unexpected eof") |
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me._fst.end() |
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// my .end() is coming later. |
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}
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