Add a python script to generate the chromium .pak resource files.

This is necessary, because the pak files must be available
when qmake checks for the dependencies for RESOURCES in lib.pro.

Change-Id: Ia173c70746402b2fee09bfa035a9f8780e88cc94
Reviewed-by: Andras Becsi <andras.becsi@digia.com>

build/scripts/build_resources.py

+#!/usr/bin/env python
+
+#############################################################################
+#
+# Copyright (C) 2013 Digia Plc and/or its subsidiary(-ies).
+# Contact: http://www.qt-project.org/legal
+#
+# This file is part of the QtWebEngine module of the Qt Toolkit.
+#
+# $QT_BEGIN_LICENSE:LGPL$
+# Commercial License Usage
+# Licensees holding valid commercial Qt licenses may use this file in
+# accordance with the commercial license agreement provided with the
+# Software or, alternatively, in accordance with the terms contained in
+# a written agreement between you and Digia.  For licensing terms and
+# conditions see http://qt.digia.com/licensing.  For further information
+# use the contact form at http://qt.digia.com/contact-us.
+#
+# GNU Lesser General Public License Usage
+# Alternatively, this file may be used under the terms of the GNU Lesser
+# General Public License version 2.1 as published by the Free Software
+# Foundation and appearing in the file LICENSE.LGPL included in the
+# packaging of this file.  Please review the following information to
+# ensure the GNU Lesser General Public License version 2.1 requirements
+# will be met: http://www.gnu.org/licenses/old-licenses/lgpl-2.1.html.
+#
+# In addition, as a special exception, Digia gives you certain additional
+# rights.  These rights are described in the Digia Qt LGPL Exception
+# version 1.1, included in the file LGPL_EXCEPTION.txt in this package.
+#
+# GNU General Public License Usage
+# Alternatively, this file may be used under the terms of the GNU
+# General Public License version 3.0 as published by the Free Software
+# Foundation and appearing in the file LICENSE.GPL included in the
+# packaging of this file.  Please review the following information to
+# ensure the GNU General Public License version 3.0 requirements will be
+# met: http://www.gnu.org/copyleft/gpl.html.
+#
+#
+# $QT_END_LICENSE$
+#
+#############################################################################
+
+import glob
+import os
+import subprocess
+import sys
+import string
+import time
+
+qtwebengine_src = os.path.abspath(os.path.join(os.path.dirname(__file__), "../.."))
+
+chrome_src = os.environ.get('CHROMIUM_SRC_DIR')
+if chrome_src:
+  chrome_src = os.path.abspath(chrome_src)
+if not chrome_src or not os.path.isdir(chrome_src):
+  chrome_src = os.path.join(qtwebengine_src, 'chromium')
+  print 'CHROMIUM_SRC_DIR not set, falling back to ' + chrome_src
+
+grit_tool = os.path.join(chrome_src, 'tools/grit/grit.py')
+resources_subdir = os.path.join(qtwebengine_src, 'resources')
+
+def checkNeedForRebuild(grd_file):
+    grit_files = subprocess.check_output(['python', grit_tool, '-i', grd_file, 'buildinfo']).splitlines()
+
+    dependencies = [grd_file]
+    data_packages = []
+    for line in grit_files:
+        if line.startswith('input|'):
+            dependencies.append(line.split('|')[1])
+        if line.startswith('data_package|'):
+            data_packages.append(line.split('|')[1])
+
+    target_timestamp = 0
+    for data_package in data_packages:
+        data_package_file = os.path.join(resources_subdir, data_package)
+        if not os.path.isfile(data_package_file):
+            return True
+
+        data_package_timestamp = os.path.getmtime(data_package_file)
+        if data_package_timestamp < target_timestamp or target_timestamp == 0:
+            target_timestamp = data_package_timestamp
+
+    for dependency in dependencies:
+        dependency_timestamp = os.path.getmtime(dependency)
+        if (dependency_timestamp > target_timestamp):
+            return True
+    return False
+
+def rebuildPakFile(grd_file):
+    print 'Rebuilding resource file for:' + grd_file
+    resource_ids_file = os.path.join(chrome_src, 'tools/gritsettings/resource_ids')
+    subprocess.call(['python', grit_tool, '-i', grd_file, 'build', '-f', resource_ids_file, '-o', resources_subdir])
+
+def rebuildIfNeeded(grd_file):
+    grd_file = os.path.join(chrome_src, grd_file)
+    if checkNeedForRebuild(grd_file):
+        rebuildPakFile(grd_file)
+
+
+# The grd_file is specified relative to the chromium source directory.
+rebuildIfNeeded('net/base/net_resources.grd')

lib/lib.pro

@@ -3,7 +3,6 @@
 # our gyp_generator.prf feature to the CONFIG variable since it is processed backwards
 CONFIG = gyp_generator $$CONFIG
 GYPDEPENDENCIES += ../shared/shared.gyp:qtwebengine_shared
-GYPDEPENDENCIES += ../chromium/net/net.gyp:net_resources
 GYPINCLUDES += ../qtwebengine.gypi
 
 TEMPLATE = lib
@@ -22,6 +21,8 @@ CONFIG(release, debug|release): DEFINES += NDEBUG
 QT += widgets quick
 
 RESOURCES += lib_resources.qrc
+# We need this to find the include files generated for the .pak resource files.
+INCLUDEPATH += $$absolute_path(../resources, $$PWD)
 
 SOURCES = \
         backing_store_qt.cpp \

lib/lib_resources.qrc

 <!DOCTYPE RCC><RCC version="1.0">
 <qresource prefix="data">
-    <file alias="resources.pak">/Users/zeno/work/qtwebengine/out/Release/gen/net/net_resources.pak</file>
+    <file alias="resources.pak">../resources/net_resources.pak</file>
 </qresource>
-</RCC>
\ No newline at end of file
+</RCC>

qtwebengine.pro

@@ -4,7 +4,8 @@ CONFIG += ordered
 
 # The first three subdirs contain dummy .pro files that are used by qmake
 # to generate a corresponding .gyp file
-SUBDIRS = shared \
+SUBDIRS = resources \
+          shared \
           lib \
           process \
           build \ # This is where we use the generated qt_generated.gypi and run gyp

resources/resources.pro

+# This is a dummy .pro file used to prepare chromium .pak resource files.
+# These files will then be bundled using the Qt Resource System.
+TEMPLATE = subdirs
+
+system(python ../build/scripts/build_resources.py)
+
+