aaac7fed
 liuqimichale
add
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// give it a tarball and a path, and it'll dump the contents
module.exports = Extract
var tar = require("../tar.js")
, fstream = require("fstream")
, inherits = require("inherits")
, path = require("path")
function Extract (opts) {
if (!(this instanceof Extract)) return new Extract(opts)
tar.Parse.apply(this)
if (typeof opts !== "object") {
opts = { path: opts }
}
// better to drop in cwd? seems more standard.
opts.path = opts.path || path.resolve("node-tar-extract")
opts.type = "Directory"
opts.Directory = true
// similar to --strip or --strip-components
opts.strip = +opts.strip
if (!opts.strip || opts.strip <= 0) opts.strip = 0
this._fst = fstream.Writer(opts)
this.pause()
var me = this
// Hardlinks in tarballs are relative to the root
// of the tarball. So, they need to be resolved against
// the target directory in order to be created properly.
me.on("entry", function (entry) {
// if there's a "strip" argument, then strip off that many
// path components.
if (opts.strip) {
var p = entry.path.split("/").slice(opts.strip).join("/")
entry.path = entry.props.path = p
if (entry.linkpath) {
var lp = entry.linkpath.split("/").slice(opts.strip).join("/")
entry.linkpath = entry.props.linkpath = lp
}
}
if (entry.type === "Link") {
entry.linkpath = entry.props.linkpath =
path.join(opts.path, path.join("/", entry.props.linkpath))
}
if (entry.type === "SymbolicLink") {
var dn = path.dirname(entry.path) || ""
var linkpath = entry.props.linkpath
var target = path.resolve(opts.path, dn, linkpath)
if (target.indexOf(opts.path) !== 0) {
linkpath = path.join(opts.path, path.join("/", linkpath))
}
entry.linkpath = entry.props.linkpath = linkpath
}
})
this._fst.on("ready", function () {
me.pipe(me._fst, { end: false })
me.resume()
})
this._fst.on('error', function(err) {
me.emit('error', err)
})
this._fst.on('drain', function() {
me.emit('drain')
})
// this._fst.on("end", function () {
// console.error("\nEEEE Extract End", me._fst.path)
// })
this._fst.on("close", function () {
// console.error("\nEEEE Extract End", me._fst.path)
me.emit("finish")
me.emit("end")
me.emit("close")
})
}
inherits(Extract, tar.Parse)
Extract.prototype._streamEnd = function () {
var me = this
if (!me._ended || me._entry) me.error("unexpected eof")
me._fst.end()
// my .end() is coming later.
}
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