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Reland of Enable whitelist generation for official builds.
Previous: https://codereview.chromium.org/2175413004/ Currently, all resources are included in PAK files when Chrome is built locally. Only official_buildbot.sh uses a resource whitelist. This CL enables local builds to use resource whitelisting by setting the enable_resource_whitelist_generation gn flag to true, or by building an official build. This will allow developers to more easily monitor the changes in APK size for each commit they make. However, a large amount of output is generated (_pragma is used to create warnings to allow whitelisted resources to be listed), so for now the whitelist will only be generated for official builds. This change results in a ~1.5 mb difference when calculating the APK size with resource_sizes.py. BUG=632385 Review-Url: https://codereview.chromium.org/2241383004 Cr-Commit-Position: refs/heads/master@{#413584}
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,44 @@ | ||
| #!/usr/bin/env python | ||
| # Copyright 2016 The Chromium Authors. All rights reserved. | ||
| # Use of this source code is governed by a BSD-style license that can be | ||
| # found in the LICENSE file. | ||
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| """Runs a compilation command. | ||
| This script exists to avoid using complex shell commands in | ||
| gcc_toolchain.gni's tool("cxx") and tool("cc") in case the host running the | ||
| compiler does not have a POSIX-like shell (e.g. Windows). | ||
| """ | ||
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| import argparse | ||
| import sys | ||
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| import wrapper_utils | ||
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| def main(): | ||
| parser = argparse.ArgumentParser(description=__doc__) | ||
| parser.add_argument('--resource-whitelist', | ||
| help='Generate a resource whitelist for this target.', | ||
| metavar='PATH') | ||
| parser.add_argument('command', nargs=argparse.REMAINDER, | ||
| help='Compilation command') | ||
| args = parser.parse_args() | ||
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| returncode, stderr = wrapper_utils.CaptureCommandStderr( | ||
| wrapper_utils.CommandToRun(args.command)) | ||
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| used_resources = wrapper_utils.ExtractResourceIdsFromPragmaWarnings(stderr) | ||
| sys.stderr.write(stderr) | ||
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| if args.resource_whitelist: | ||
| with open(args.resource_whitelist, 'w') as f: | ||
| if used_resources: | ||
| f.write('\n'.join(str(resource) for resource in used_resources)) | ||
| f.write('\n') | ||
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| return returncode | ||
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| if __name__ == "__main__": | ||
| sys.exit(main()) |
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,105 @@ | ||
| # Copyright (c) 2016 The Chromium Authors. All rights reserved. | ||
| # Use of this source code is governed by a BSD-style license that can be | ||
| # found in the LICENSE file. | ||
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| """Helper functions for gcc_toolchain.gni wrappers.""" | ||
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| import os | ||
| import re | ||
| import subprocess | ||
| import shlex | ||
| import sys | ||
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| _BAT_PREFIX = 'cmd /c call ' | ||
| _WHITELIST_RE = re.compile('whitelisted_resource_(?P<resource_id>[0-9]+)') | ||
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| def CommandToRun(command): | ||
| """Generates commands compatible with Windows. | ||
| When running on a Windows host and using a toolchain whose tools are | ||
| actually wrapper scripts (i.e. .bat files on Windows) rather than binary | ||
| executables, the |command| to run has to be prefixed with this magic. | ||
| The GN toolchain definitions take care of that for when GN/Ninja is | ||
| running the tool directly. When that command is passed in to this | ||
| script, it appears as a unitary string but needs to be split up so that | ||
| just 'cmd' is the actual command given to Python's subprocess module. | ||
| Args: | ||
| command: List containing the UNIX style |command|. | ||
| Returns: | ||
| A list containing the Windows version of the |command|. | ||
| """ | ||
| if command[0].startswith(_BAT_PREFIX): | ||
| command = command[0].split(None, 3) + command[1:] | ||
| return command | ||
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| def ResolveRspLinks(inputs): | ||
| """Return a list of files contained in a response file. | ||
| Args: | ||
| inputs: A command containing rsp files. | ||
| Returns: | ||
| A set containing the rsp file content.""" | ||
| rspfiles = [a[1:] for a in inputs if a.startswith('@')] | ||
| resolved = set() | ||
| for rspfile in rspfiles: | ||
| with open(rspfile, 'r') as f: | ||
| resolved.update(shlex.split(f.read())) | ||
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| return resolved | ||
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| def CombineResourceWhitelists(whitelist_candidates, outfile): | ||
| """Combines all whitelists for a resource file into a single whitelist. | ||
| Args: | ||
| whitelist_candidates: List of paths to rsp files containing all targets. | ||
| outfile: Path to save the combined whitelist. | ||
| """ | ||
| whitelists = ('%s.whitelist' % candidate for candidate in whitelist_candidates | ||
| if os.path.exists('%s.whitelist' % candidate)) | ||
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| resources = set() | ||
| for whitelist in whitelists: | ||
| with open(whitelist, 'r') as f: | ||
| resources.update(f.readlines()) | ||
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| with open(outfile, 'w') as f: | ||
| f.writelines(resources) | ||
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| def ExtractResourceIdsFromPragmaWarnings(text): | ||
| """Returns set of resource IDs that are inside unknown pragma warnings. | ||
| Args: | ||
| text: The text that will be scanned for unknown pragma warnings. | ||
| Returns: | ||
| A set containing integers representing resource IDs. | ||
| """ | ||
| used_resources = set() | ||
| lines = text.splitlines() | ||
| for ln in lines: | ||
| match = _WHITELIST_RE.search(ln) | ||
| if match: | ||
| resource_id = int(match.group('resource_id')) | ||
| used_resources.add(resource_id) | ||
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| return used_resources | ||
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| def CaptureCommandStderr(command): | ||
| """Returns the stderr of a command. | ||
| Args: | ||
| args: A list containing the command and arguments. | ||
| cwd: The working directory from where the command should be made. | ||
| env: Environment variables for the new process. | ||
| """ | ||
| child = subprocess.Popen(command, stderr=subprocess.PIPE) | ||
| _, stderr = child.communicate() | ||
| return child.returncode, stderr |
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