def _bundle_v3(tmp_out_dir, in_path, out_path, manifest_out_path, args,
excludes, external_paths):
if not os.path.exists(tmp_out_dir):
os.makedirs(tmp_out_dir)
path_to_plugin = os.path.join(
os.path.abspath(_HERE_PATH), 'tools', 'rollup_plugin.js')
rollup_config_file = _generate_rollup_config(tmp_out_dir, path_to_plugin,
in_path, args.host, excludes,
external_paths)
rollup_args = [os.path.join(in_path, f) for f in args.js_module_in_files]
# Confirm names are as expected. This is necessary to avoid having to replace
# import statements in the generated output files.
# TODO(rbpotter): Is it worth adding import statement replacement to support
# arbitrary names?
bundled_paths = []
for index, js_file in enumerate(args.js_module_in_files):
base_file_name = os.path.basename(js_file)
expected_name = '%s.rollup.js' % base_file_name[:-len('.js')]
assert args.js_out_files[index] == expected_name, \
'Output file corresponding to %s should be named %s' % \
(js_file, expected_name)
bundled_paths.append(os.path.join(tmp_out_dir, expected_name))
# This indicates that rollup is expected to generate a shared chunk file as
# well as one file per module. Set its name using --chunkFileNames. Note:
# Currently, this only supports 2 entry points, which generate 2 corresponding
# outputs and 1 shared output.
if (len(args.js_out_files) == 3):
assert len(args.js_module_in_files) == 2, \
'Expect 2 module entry points for generating 3 outputs'
shared_file_name = args.js_out_files[2]
rollup_args += [ '--chunkFileNames', shared_file_name ]
bundled_paths.append(os.path.join(tmp_out_dir, shared_file_name))
node.RunNode(
[node_modules.PathToRollup()] + rollup_args + [
'--format', 'esm',
'--dir', tmp_out_dir,
'--entryFileNames', '[name].rollup.js',
'--sourcemap', '--sourcemapExcludeSources',
'--config', rollup_config_file,
'--silent',
])
# Create the manifest file from the sourcemaps generated by rollup.
generated_paths = _generate_manifest_file(tmp_out_dir, in_path,
manifest_out_path)
assert len(generated_paths) == len(bundled_paths), \
'unexpected number of bundles - %s - generated by rollup' % \
(len(generated_paths))
for bundled_file in bundled_paths:
with open(bundled_file, 'r') as f:
output = f.read()
assert "<if expr" not in output, \
'Unexpected <if expr> found in bundled output. Check that all ' + \
'input files using such expressions are preprocessed.'
return bundled_paths
def _bundle_v3(tmp_out_dir, in_path, out_path, manifest_out_path, args,
excludes):
if not os.path.exists(tmp_out_dir):
os.makedirs(tmp_out_dir)
path_to_plugin = os.path.join(os.path.abspath(_HERE_PATH), 'tools',
'rollup_plugin.js')
rollup_config_file = _generate_rollup_config(tmp_out_dir, path_to_plugin,
in_path, args.host, excludes)
bundled_paths = []
for index, js_module_in_file in enumerate(args.js_module_in_files):
js_out_file = args.js_out_files[index]
rollup_js_out_file = '%s.rollup.js' % js_out_file[:-3]
rollup_js_out_path = os.path.join(tmp_out_dir, rollup_js_out_file)
node.RunNode([node_modules.PathToRollup()] + [
'--format',
'esm',
'--input',
os.path.join(in_path, js_module_in_file),
'--file',
rollup_js_out_path,
'--sourcemap',
'--sourcemapExcludeSources',
'--config',
rollup_config_file,
'--silent',
])
# Create the manifest file from the sourcemap generated by rollup.
_generate_manifest_file(rollup_js_out_file, tmp_out_dir, in_path,
manifest_out_path)
bundled_paths.append(rollup_js_out_path)
return bundled_paths
def _bundle_v3(tmp_out_dir, in_path, out_path, manifest_out_path, args,
excludes):
if not os.path.exists(tmp_out_dir):
os.makedirs(tmp_out_dir)
path_to_plugin = os.path.join(
os.path.abspath(_HERE_PATH), 'tools', 'rollup_plugin.js')
rollup_config_file = _generate_rollup_config(tmp_out_dir, path_to_plugin,
in_path, args.host, excludes)
bundled_paths = []
for index, js_module_in_file in enumerate(args.js_module_in_files):
js_out_file = args.js_out_files[index]
rollup_js_out_file = '%s.rollup.js' % js_out_file[:-3]
rollup_js_out_path = os.path.join(tmp_out_dir, rollup_js_out_file)
node.RunNode(
[node_modules.PathToRollup()] + [
'--format', 'esm',
'--input', os.path.join(in_path, js_module_in_file),
'--file', rollup_js_out_path,
'--sourcemap', '--sourcemapExcludeSources',
'--config', rollup_config_file,
'--silent',
])
# Copy the HTML file and replace the script name.
html_file = args.html_in_files[index]
html_out_file = args.html_out_files[index]
with open(os.path.join(in_path, html_file), 'r') as f:
output = f.read()
output = output.replace(js_module_in_file, js_out_file);
with open(os.path.join(out_path, html_out_file), 'w') as f:
f.write(output)
f.close()
# Create the manifest file from the sourcemap generated by rollup.
_generate_manifest_file(rollup_js_out_file, tmp_out_dir, in_path,
manifest_out_path)
bundled_paths.append(rollup_js_out_path)
return bundled_paths
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')
node.RunNode([
node_modules.PathToRollup(),
# 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)