def _optimize(in_folder, args):
in_path = os.path.normpath(os.path.join(_CWD,
in_folder)).replace('\\', '/')
out_path = os.path.join(_CWD, args.out_folder).replace('\\', '/')
manifest_out_path = _request_list_path(out_path, args.host_url)
tmp_out_dir = tempfile.mkdtemp(dir=out_path).replace('\\', '/')
excludes = _BASE_EXCLUDES + [
# This file is dynamically created by C++. Need to specify an exclusion
# URL for both the relative URL and chrome:// URL syntax.
'strings.js',
'strings.m.js',
'%s/strings.js' % args.host_url,
'%s/strings.m.js' % args.host_url,
]
excludes.extend(args.exclude or [])
external_paths = args.external_paths or []
try:
if args.js_module_in_files:
pcb_out_paths = [
os.path.join(tmp_out_dir, f) for f in args.js_out_files
]
bundled_paths = _bundle_v3(tmp_out_dir, in_path, out_path,
manifest_out_path, args, excludes,
external_paths)
else:
# Ensure Polymer 2 and Polymer 3 request lists don't collide.
manifest_out_path = _request_list_path(out_path,
args.host_url[:-1] + '-v2/')
pcb_out_paths = [
os.path.join(out_path, f) for f in args.html_out_files
]
bundled_paths = _bundle_v2(tmp_out_dir, in_path, out_path,
manifest_out_path, args, excludes)
# Run polymer-css-build.
node.RunNode([node_modules.PathToPolymerCssBuild()] +
['--polymer-version', '2'] +
['--no-inline-includes', '-f'] + bundled_paths + ['-o'] +
pcb_out_paths)
# Pass the JS files through Uglify and write the output to its final
# destination.
for index, js_out_file in enumerate(args.js_out_files):
node.RunNode([
node_modules.PathToTerser(),
os.path.join(tmp_out_dir, js_out_file), '--comments',
'/Copyright|license|LICENSE|\<\/?if/', '--output',
os.path.join(out_path, js_out_file)
])
finally:
shutil.rmtree(tmp_out_dir)
return manifest_out_path
def Minify(source):
# Open two temporary files, so that uglify can read the input from one and
# write its output to the other.
with tempfile.NamedTemporaryFile(suffix='.js') as infile, \
tempfile.NamedTemporaryFile(suffix='.js') as outfile:
infile.write(source)
infile.flush()
node.RunNode([
node_modules.PathToTerser(), infile.name, '--output', outfile.name
])
result = outfile.read()
return result
def main(argv):
parser = argparse.ArgumentParser()
parser.add_argument('--out_folder', required=True)
args = parser.parse_args(argv)
node.RunNode([
node_modules.PathToTerser(),
os.path.join(_HERE_PATH, 'lottie_worker.js'), '--ascii_only=true',
'-b', 'beautify=false', '--compress', '--mangle',
'reserved=[\'$\',\'onmessage\',\'postMessage\']', '--output',
os.path.join(args.out_folder, 'lottie_worker.min.js')
])
def main():
polymer_dir = os.path.join(_HERE_PATH, 'components-chromium', 'polymer2')
# Final HTML bundle.
polymer_html = os.path.join(polymer_dir, 'polymer.html')
# Final JS bundle.
polymer_js = os.path.join(polymer_dir, 'polymer-extracted.js')
# Move the entire checkout to a temp location.
tmp_dir = os.path.join(_HERE_PATH, 'components-chromium', 'polymer2temp')
if os.path.exists(tmp_dir):
shutil.rmtree(tmp_dir)
shutil.move(polymer_dir, tmp_dir)
tmp_out_dir = os.path.join(tmp_dir, 'out')
os.makedirs(tmp_out_dir)
try:
# Combine everything to a single HTML bundle file.
node.RunNode([
node_modules.PathToBundler(),
'--strip-comments',
'--inline-scripts',
'--inline-css',
'--out-file',
os.path.join(tmp_out_dir, 'polymer.html'),
os.path.join(tmp_dir, 'polymer.html'),
])
# Extract the JS to a separate file named polymer-extracted.js.
extract_inline_scripts.ExtractFrom(
os.path.join(tmp_out_dir, 'polymer.html'))
# Minify the JS bundle.
extracted_js = os.path.join(tmp_out_dir, 'polymer-extracted.js')
node.RunNode([
node_modules.PathToTerser(), extracted_js, '--comments',
'/Copyright|license|LICENSE/', '--output', extracted_js
])
# Copy generated bundled JS/HTML files back to the original location.
os.makedirs(polymer_dir)
shutil.move(os.path.join(tmp_out_dir, 'polymer.html'), polymer_html)
shutil.move(extracted_js, polymer_js)
# Copy a few more files.
shutil.move(os.path.join(tmp_dir, 'bower.json'), polymer_dir)
shutil.move(os.path.join(tmp_dir, 'LICENSE.txt'), polymer_dir)
finally:
# Delete component-chromium/shadycss since it ends up in the bundle.
shutil.rmtree(
os.path.join(_HERE_PATH, 'components-chromium', 'shadycss'))
shutil.rmtree(tmp_dir)
def __StripJsComments(filename):
"""Returns the minified contents of a JavaScript file with comments and
grit directives removed.
Args:
filename: The name of the file to read.
Returns:
A string consisting of the minified file contents with comments and grit
directives removed.
"""
with open(filename) as f:
text = f.read()
text = re.sub('<if .*?>', '', text, flags=re.IGNORECASE)
text = re.sub('</if>', '', text, flags=re.IGNORECASE)
return node.RunNode([node_modules.PathToTerser(), filename])
def _optimize(in_folder, args):
in_path = os.path.normpath(os.path.join(_CWD,
in_folder)).replace('\\', '/')
out_path = os.path.join(_CWD, args.out_folder).replace('\\', '/')
manifest_out_path = _request_list_path(out_path, args.target_name)
tmp_out_dir = tempfile.mkdtemp(dir=out_path).replace('\\', '/')
excludes = _BASE_EXCLUDES + [
# This file is dynamically created by C++. Should always be imported with a
# relative path.
'strings.m.js',
]
excludes.extend(args.exclude or [])
external_paths = args.external_paths or []
try:
pcb_out_paths = [
os.path.join(tmp_out_dir, f) for f in args.js_out_files
]
bundled_paths = _bundle_v3(tmp_out_dir, in_path, out_path,
manifest_out_path, args, excludes,
external_paths)
# Run polymer-css-build.
node.RunNode([node_modules.PathToPolymerCssBuild()] +
['--polymer-version', '2'] +
['--no-inline-includes', '-f'] + bundled_paths + ['-o'] +
pcb_out_paths)
# Pass the JS files through Terser and write the output to its final
# destination.
for index, js_out_file in enumerate(args.js_out_files):
node.RunNode([
node_modules.PathToTerser(),
os.path.join(tmp_out_dir, js_out_file), '--comments',
'/Copyright|license|LICENSE|\<\/?if/', '--output',
os.path.join(out_path, js_out_file)
])
finally:
shutil.rmtree(tmp_out_dir)
return manifest_out_path
def _build(in_folder, args):
in_path = os.path.normpath(os.path.join(_CWD,
in_folder)).replace('\\', '/')
out_path = os.path.join(_CWD, args.out_folder).replace('\\', '/')
request_list_path = _request_list_path(out_path, args.host_url)
tmp_out_dir = tempfile.mkdtemp(dir=out_path).replace('\\', '/')
excludes = _BASE_EXCLUDES + [
# This file is dynamically created by C++. Need to specify an exclusion
# URL for both the relative URL and chrome:// URL syntax.
'strings.js',
'strings.m.js',
'%s/strings.js' % args.host_url,
'%s/strings.m.js' % args.host_url,
]
excludes.extend(args.exclude or [])
external_paths = args.external_paths or []
try:
if args.js_module_in_files:
bundled_paths = build(tmp_out_dir, in_path, out_path,
request_list_path, args, excludes,
external_paths)
# Pass the JS files through Uglify and write the output to its final
# destination.
for index, js_out_file in enumerate(args.js_out_files):
node.RunNode([
node_modules.PathToTerser(),
os.path.join(tmp_out_dir, js_out_file), '--comments',
'/Copyright|license|LICENSE|\<\/?if/', '--output',
os.path.join(out_path, js_out_file)
])
finally:
shutil.rmtree(tmp_out_dir)
return request_list_path
def main():
polymer_dir = os.path.join(_HERE_PATH, 'components-chromium', 'polymer')
# Copy the top-level Polymer file that holds all dependencies. This file is
# not distributed via NPM, it only exists within third_party/polymer
# repository.
shutil.copy(os.path.join(polymer_dir, '..', '..', 'polymer.js'),
polymer_dir)
# Move the entire checkout to a temp location.
tmp_dir = os.path.join(_HERE_PATH, 'components-chromium', 'polymer_temp')
if os.path.exists(tmp_dir):
shutil.rmtree(tmp_dir)
shutil.move(polymer_dir, tmp_dir)
tmp_out_dir = os.path.join(tmp_dir, 'out')
os.makedirs(tmp_out_dir)
try:
# Combine everything to a single JS bundle file.
bundled_js = os.path.join(tmp_out_dir, 'polymer_bundled.js')
path_to_rollup = os.path.join('node_modules', 'rollup', 'bin',
'rollup')
node.RunNode([
path_to_rollup,
# See https://github.com/rollup/rollup/issues/1955
'--silent',
'--format',
'esm',
'--input',
os.path.join(tmp_dir, 'polymer.js'),
'--file',
bundled_js,
])
# Minify the JS bundle.
minified_js = os.path.join(tmp_out_dir, 'polymer_bundled.min.js')
node.RunNode([
node_modules.PathToTerser(),
bundled_js,
# TODO(dpapad): Figure out a way to deduplicate LICENSE headers. In the
# meantime exclude such comments to reduce file size.
'--comments',
'false',
#'--comments', '/Copyright|license|LICENSE/',
'--output',
minified_js
])
# Copy generated JS bundle back to the original location.
os.makedirs(polymer_dir)
shutil.move(minified_js, polymer_dir)
# Copy LICENSE file.
shutil.copy(os.path.join(tmp_dir, 'LICENSE.txt'), polymer_dir)
# Copy files needed for type checking.
# - |bundled_js| is the JS bundle with JS type annotations.
# - various externs files
shutil.copy(bundled_js, polymer_dir)
externs_to_copy = [
os.path.join(tmp_dir, 'externs', 'closure-types.js'),
os.path.join(tmp_dir, 'externs', 'polymer-dom-api-externs.js'),
os.path.join(tmp_dir, 'externs', 'polymer-externs.js'),
os.path.join(tmp_dir, 'externs', 'webcomponents-externs.js'),
os.path.join(polymer_dir, '..', 'shadycss', 'externs',
'shadycss-externs.js'),
]
externs_dir = os.path.join(polymer_dir, 'externs')
os.makedirs(externs_dir)
for extern in externs_to_copy:
shutil.copy(extern, externs_dir)
finally:
# Delete component-chromium/shadycss since it ends up in the bundle.
shutil.rmtree(
os.path.join(_HERE_PATH, 'components-chromium', 'shadycss'))
shutil.rmtree(tmp_dir)