first commit

build/node_modules/tar/lib/extract.js

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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.
+}