gecko-dev/browser/installer/precompile_cache.js

/* -*- Mode: Java; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
/* vim:set ts=2 sw=2 sts=2 et: */
/* ***** BEGIN LICENSE BLOCK *****
 * Version: MPL 1.1/GPL 2.0/LGPL 2.1
 *
 * The contents of this file are subject to the Mozilla Public License Version
 * 1.1 (the "License"); you may not use this file except in compliance with
 * the License. You may obtain a copy of the License at
 * http://www.mozilla.org/MPL/
 *
 * Software distributed under the License is distributed on an "AS IS" basis,
 * WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
 * for the specific language governing rights and limitations under the
 * License.
 *
 * The Original Code is mozilla.org code.
 *
 * The Initial Developer of the Original Code is
 * Mozilla Foundation.
 * Portions created by the Initial Developer are Copyright (C) 2010
 * the Initial Developer. All Rights Reserved.
 * 
 * Contributor(s):
 *  Taras Glek <tglek@mozilla.com>
 *
 * Alternatively, the contents of this file may be used under the terms of
 * either the GNU General Public License Version 2 or later (the "GPL"), or
 * the GNU Lesser General Public License Version 2.1 or later (the "LGPL"),
 * in which case the provisions of the GPL or the LGPL are applicable instead
 * of those above. If you wish to allow use of your version of this file only
 * under the terms of either the GPL or the LGPL, and not to allow others to
 * use your version of this file under the terms of the MPL, indicate your
 * decision by deleting the provisions above and replace them with the notice
 * and other provisions required by the GPL or the LGPL. If you do not delete
 * the provisions above, a recipient may use your version of this file under
 * the terms of any one of the MPL, the GPL or the LGPL.
 *
 * ***** END LICENSE BLOCK ***** */

// see http://mxr.mozilla.org/mozilla-central/source/services/sync/Weave.js#76

const Cc = Components.classes;
const Ci = Components.interfaces;
const Cu = Components.utils;

function setenv(name, val) {
  try {
        var environment = Components.classes["@mozilla.org/process/environment;1"].
          getService(Components.interfaces.nsIEnvironment);
        environment.set(name, val);
  }
  catch(e) {
    displayError("setenv", e);
  }
}

function load(url) {
  print(url)
  try {
    Cu.import(url, null)
  } catch(e) {
    dump("Failed to import "+url + ":"+e+"\n");
  }
}

function load_entries(entries, prefix) {
  while(entries.hasMore()) {
    var c = entries.getNext();
    load(prefix + c);
  }
}

function getGreDir() {
  return Cc["@mozilla.org/file/directory_service;1"].getService(Ci.nsIProperties).get("GreD", Ci.nsIFile);
}

function openJar(file) {
  var zipreader = Cc["@mozilla.org/libjar/zip-reader;1"].createInstance(Ci.nsIZipReader);
  zipreader.open(file);
  return zipreader;
}

// Check that files can be read from after closing zipreader
function populate_omnijar() {
  var file = getGreDir();
  file.append("omni.jar");
  setenv("MOZ_STARTUP_CACHE", file.path);
  zipreader = openJar(file);

  load_entries(zipreader.findEntries("components/*js"), "resource://gre/");
  load_entries(zipreader.findEntries("modules/*jsm"), "resource://gre/");

  // the sync part below doesn't work as smoothly
  let ioService = Cc["@mozilla.org/network/io-service;1"].getService(Ci.nsIIOService);
  let uri = ioService.newURI("resource:///modules/services-sync/",
                             null, null);
  let resProt = ioService.getProtocolHandler("resource")
    .QueryInterface(Ci.nsIResProtocolHandler);
  resProt.setSubstitution("services-sync", uri);

  var entries = zipreader.findEntries("modules/services-sync/*js");
  while(entries.hasMore()) {
    var c = entries.getNext();
    load("resource://services-sync/" + c.replace("modules/services-sync/", ""));
  }
  zipreader.close();
}

function extract_files(jar, pattern, dest) {
  var entries = jar.findEntries(pattern);
  while(entries.hasMore()) {
    var c = entries.getNext();
    var file = dest.clone();
    for each(name in c.split("/"))
      file.append(name);

    if (!file.parent.exists()) { 
      file.parent.create(1 /* Ci.nsIFile.DIRECTORY doesn't work*/, 0700);
      print("Created " + file.parent.path)
    }

    if (jar.getEntry(c).isDirectory)
      continue;
    
    try {
      jar.extract(c, file);
      print("extracted "+file.path+":"+file.fileSize);
    }catch(e) {
      // This shouldn't happen, but if it does it means the cache entry will be generated at runtime
      // instead of at package-time.
      print("Failed to extract " + file.path);
      print(e)
    }
  }

}

function extract_jsloader_to_dist_bin() {
  var dist_bin = getGreDir().parent;
  dist_bin.append("bin");

  var file = getGreDir();
  file.append("omni.jar");

  var zipReader = openJar(file);
  // this should really be zipReader.extract(...), but that method is too broken
  extract_files(zipReader, "jsloader/*", dist_bin);
  zipReader.close();
}