gecko/toolkit/mozapps/installer/precompile_cache.js
Jim Blandy 4d6a633bba Bug 914753: Make Emacs file variable header lines correct, or at least consistent. DONTBUILD r=ehsan
The -*- file variable lines -*- establish per-file settings that Emacs will
pick up. This patch makes the following changes to those lines (and touches
nothing else):

 - Never set the buffer's mode.

   Years ago, Emacs did not have a good JavaScript mode, so it made sense
   to use Java or C++ mode in .js files. However, Emacs has had js-mode for
   years now; it's perfectly serviceable, and is available and enabled by
   default in all major Emacs packagings.

   Selecting a mode in the -*- file variable line -*- is almost always the
   wrong thing to do anyway. It overrides Emacs's default choice, which is
   (now) reasonable; and even worse, it overrides settings the user might
   have made in their '.emacs' file for that file extension. It's only
   useful when there's something specific about that particular file that
   makes a particular mode appropriate.

 - Correctly propagate settings that establish the correct indentation
   level for this file: c-basic-offset and js2-basic-offset should be
   js-indent-level. Whatever value they're given should be preserved;
   different parts of our tree use different indentation styles.

 - We don't use tabs in Mozilla JS code. Always set indent-tabs-mode: nil.
   Remove tab-width: settings, at least in files that don't contain tab
   characters.

 - Remove js2-mode settings that belong in the user's .emacs file, like
   js2-skip-preprocessor-directives.
2014-06-24 22:12:07 -07:00

95 lines
3.3 KiB
JavaScript

/* -*- indent-tabs-mode: nil; js-indent-level: 2 -*- */
/* vim:set ts=2 sw=2 sts=2 et: */
/* This Source Code Form is subject to the terms of the Mozilla Public
* License, v. 2.0. If a copy of the MPL was not distributed with this
* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
// 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;
Cu.import("resource://gre/modules/Services.jsm");
const rph = Services.io.getProtocolHandler("resource").QueryInterface(Ci.nsIResProtocolHandler);
function endsWith(str, end) {
return str.slice(-end.length) == end;
}
function jar_entries(jarReader, pattern) {
var entries = [];
var enumerator = jarReader.findEntries(pattern);
while (enumerator.hasMore()) {
entries.push(enumerator.getNext());
}
return entries;
}
function dir_entries(baseDir, subpath, ext) {
var dir = baseDir.clone();
dir.append(subpath);
var enumerator = dir.directoryEntries;
var entries = [];
while (enumerator.hasMoreElements()) {
var file = enumerator.getNext().QueryInterface(Ci.nsIFile);
if (file.isDirectory()) {
entries = entries.concat(dir_entries(dir, file.leafName, ext).map(function(p) subpath + "/" + p));
} else if (endsWith(file.leafName, ext)) {
entries.push(subpath + "/" + file.leafName);
}
}
return entries;
}
function get_modules_under(uri) {
if (uri instanceof Ci.nsIJARURI) {
var jar = uri.QueryInterface(Ci.nsIJARURI);
var jarReader = Cc["@mozilla.org/libjar/zip-reader;1"].createInstance(Ci.nsIZipReader);
var file = jar.JARFile.QueryInterface(Ci.nsIFileURL);
jarReader.open(file.file);
var entries = jar_entries(jarReader, "components/*.js")
.concat(jar_entries(jarReader, "modules/*.js"))
.concat(jar_entries(jarReader, "modules/*.jsm"));
jarReader.close();
return entries;
} else if (uri instanceof Ci.nsIFileURL){
var file = uri.QueryInterface(Ci.nsIFileURL);
return dir_entries(file.file, "components", ".js")
.concat(dir_entries(file.file, "modules", ".js"))
.concat(dir_entries(file.file, "modules", ".jsm"));
} else {
throw "Expected a nsIJARURI or nsIFileURL";
}
}
function load_modules_under(spec, uri) {
var entries = get_modules_under(uri).sort();
// The precompilation of JS here sometimes reports errors, which we don't
// really care about. But if the errors are ever reported to xpcshell's
// error reporter, it will cause it to return an error code, which will break
// automation. Currently they won't be, because the component loader spins up
// its JSContext before xpcshell has time to set its context callback (which
// overrides the error reporter on all newly-created JSContexts). But as we
// move towards a singled-cxed browser, we'll run into this. So let's be
// forward-thinking and deal with it now.
ignoreReportedErrors(true);
for each (let entry in entries) {
try {
dump(spec + entry + "\n");
Cu.import(spec + entry, null);
} catch(e) {}
}
ignoreReportedErrors(false);
}
function resolveResource(spec) {
var uri = Services.io.newURI(spec, null, null);
return Services.io.newURI(rph.resolveURI(uri), null, null);
}
function precompile_startupcache(uri) {
load_modules_under(uri, resolveResource(uri));
}