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#!/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.
import argparse
import itertools
import os
import platform
import re
import sys
import tempfile
_HERE_PATH = os.path.dirname(__file__)
_SRC_PATH = os.path.normpath(os.path.join(_HERE_PATH, '..', '..', '..'))
_CWD = os.getcwd() # NOTE(dbeam): this is typically out/<gn_name>/.
sys.path.append(os.path.join(_SRC_PATH, 'third_party', 'node'))
import node
import node_modules
_RESOURCES_PATH = os.path.join(_SRC_PATH, 'ui', 'webui', 'resources')
_CR_ELEMENTS_PATH = os.path.join(_RESOURCES_PATH, 'cr_elements')
_CSS_RESOURCES_PATH = os.path.join(_RESOURCES_PATH, 'css')
_HTML_RESOURCES_PATH = os.path.join(_RESOURCES_PATH, 'html')
_JS_RESOURCES_PATH = os.path.join(_RESOURCES_PATH, 'js')
_POLYMER_PATH = os.path.join(
_SRC_PATH, 'third_party', 'polymer', 'v1_0', 'components-chromium')
_VULCANIZE_BASE_ARGS = [
# These files are already combined and minified.
'--exclude', 'chrome://resources/html/polymer.html',
'--exclude', 'web-animations-next-lite.min.js',
# These files are dynamically created by C++.
'--exclude', 'load_time_data.js',
'--exclude', 'strings.js',
'--exclude', 'text_defaults.css',
'--exclude', 'text_defaults_md.css',
'--inline-css',
'--inline-scripts',
'--strip-comments',
]
_URL_MAPPINGS = [
('chrome://resources/cr_elements/', _CR_ELEMENTS_PATH),
('chrome://resources/css/', _CSS_RESOURCES_PATH),
('chrome://resources/html/', _HTML_RESOURCES_PATH),
('chrome://resources/js/', _JS_RESOURCES_PATH),
('chrome://resources/polymer/v1_0/', _POLYMER_PATH)
]
_VULCANIZE_REDIRECT_ARGS = list(itertools.chain.from_iterable(map(
lambda m: ['--redirect', '"%s|%s"' % (m[0], m[1])], _URL_MAPPINGS)))
_PAK_UNPACK_FOLDER = 'flattened'
def _undo_mapping(mappings, url):
for (redirect_url, file_path) in mappings:
if url.startswith(redirect_url):
return url.replace(redirect_url, file_path + os.sep)
# TODO(dbeam): can we make this stricter?
return url
def _request_list_path(out_path, html_out_file):
return os.path.join(out_path, html_out_file + '_requestlist.txt')
# Get a list of all files that were bundled with Vulcanize and update the
# depfile accordingly such that Ninja knows when to trigger re-vulcanization.
def _update_dep_file(in_folder, args):
in_path = os.path.join(_CWD, in_folder)
out_path = os.path.join(_CWD, args.out_folder)
# Prior call to vulcanize already generated the deps list, grab it from there.
request_list_path = _request_list_path(out_path, args.html_out_file)
request_list = open(request_list_path, 'r').read().splitlines()
if platform.system() == 'Windows':
# TODO(dbeam): UGH. For some reason Vulcanize is interpreting the target
# file path as a URL and using the drive letter (e.g. D:\) as a protocol.
# This is a little insane, but we're fixing here by normalizing case (which
# really shouldn't matter, these are all file paths and generally are all
# lower case) and writing from / to \ (file path) and then back again. This
# is compounded by NodeJS having a bug in url.resolve() that handles
# chrome:// protocol URLs poorly as well as us using startswith() to strip
# file paths (which isn't crazy awesome either). Don't remove unless you
# really really know what you're doing.
norm = lambda u: u.lower().replace('/', '\\')
request_list = [norm(u).replace(norm(in_path), '').replace('\\', '/')
for u in request_list]
# Undo the URL mappings applied by vulcanize to get file paths relative to
# current working directory.
url_mappings = _URL_MAPPINGS + [
('/', os.path.relpath(in_path, _CWD)),
('chrome://%s/' % args.host, os.path.relpath(in_path, _CWD)),
]
deps = [_undo_mapping(url_mappings, u) for u in request_list]
deps = map(os.path.normpath, deps)
# If the input was a .pak file, the generated depfile should not list files
# already in the .pak file.
if args.input.endswith('.pak'):
filter_url = os.path.join(args.out_folder, _PAK_UNPACK_FOLDER)
deps = [d for d in deps if not d.startswith(filter_url)]
with open(os.path.join(_CWD, args.depfile), 'w') as f:
deps_file_header = os.path.join(args.out_folder, args.html_out_file)
f.write(deps_file_header + ': ' + ' '.join(deps))
def _vulcanize(in_folder, args):
in_path = os.path.normpath(os.path.join(_CWD, in_folder))
out_path = os.path.join(_CWD, args.out_folder)
html_out_path = os.path.join(out_path, args.html_out_file)
js_out_path = os.path.join(out_path, args.js_out_file)
exclude_args = []
for f in args.exclude or []:
exclude_args.append('--exclude')
exclude_args.append(f)
output = node.RunNode(
[node_modules.PathToVulcanize()] +
_VULCANIZE_BASE_ARGS + _VULCANIZE_REDIRECT_ARGS + exclude_args +
['--out-request-list', _request_list_path(out_path, args.html_out_file),
'--redirect', '"/|%s"' % in_path,
'--redirect', '"chrome://%s/|%s"' % (args.host, in_path),
# TODO(dpapad): Figure out why vulcanize treats the input path
# differently on Windows VS Linux/Mac.
os.path.join(
in_path if platform.system() == 'Windows' else os.sep,
args.html_in_file)])
# Grit includes are not supported, use HTML imports instead.
output = output.replace('<include src="', '<include src-disabled="')
if args.insert_in_head:
assert '<head>' in output
# NOTE(dbeam): Vulcanize eats <base> tags after processing. This undoes
# that by adding a <base> tag to the (post-processed) generated output.
output = output.replace('<head>', '<head>' + args.insert_in_head)
with tempfile.NamedTemporaryFile(mode='wt+', delete=False) as tmp:
tmp.write(output)
try:
node.RunNode([node_modules.PathToCrisper(),
'--source', tmp.name,
'--script-in-head', 'false',
'--html', html_out_path,
'--js', js_out_path])
node.RunNode([node_modules.PathToUglifyJs(), js_out_path,
'--comments', '"/Copyright|license|LICENSE|\<\/?if/"',
'--output', js_out_path])
finally:
os.remove(tmp.name)
def main(argv):
parser = argparse.ArgumentParser()
parser.add_argument('--depfile', required=True)
parser.add_argument('--exclude', nargs='*')
parser.add_argument('--host', required=True)
parser.add_argument('--html_in_file', required=True)
parser.add_argument('--html_out_file', required=True)
parser.add_argument('--input', required=True)
parser.add_argument('--insert_in_head')
parser.add_argument('--js_out_file', required=True)
parser.add_argument('--out_folder', required=True)
args = parser.parse_args(argv)
# NOTE(dbeam): on Windows, GN can send dirs/like/this. When joined, you might
# get dirs/like/this\file.txt. This looks odd to windows. Normalize to right
# the slashes.
args.depfile = os.path.normpath(args.depfile)
args.input = os.path.normpath(args.input)
args.out_folder = os.path.normpath(args.out_folder)
vulcanize_input_folder = args.input
# If a .pak file was specified, unpack that file first and pass the output to
# vulcanize.
if args.input.endswith('.pak'):
import unpack_pak
output_folder = os.path.join(args.out_folder, _PAK_UNPACK_FOLDER)
unpack_pak.unpack(args.input, output_folder)
vulcanize_input_folder = output_folder
_vulcanize(vulcanize_input_folder, args)
_update_dep_file(vulcanize_input_folder, args)
if __name__ == '__main__':
main(sys.argv[1:])
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