#!/usr/bin/env python # Copyright (c) 2012 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. """Utility for checking and processing licensing information in third_party directories. Usage: licenses.py Commands: scan scan third_party directories, verifying that we have licensing info credits generate about:credits on stdout (You can also import this as a module.) """ from __future__ import print_function import argparse import codecs import json import os import shutil import re import subprocess import sys import tempfile if sys.version_info.major == 2: import cgi as html else: import html # TODO(agrieve): Move build_utils.WriteDepFile into a non-android directory. _REPOSITORY_ROOT = os.path.abspath(os.path.dirname(os.path.dirname(__file__))) sys.path.insert(0, os.path.join(_REPOSITORY_ROOT, 'build/android/gyp')) from util import build_utils # Paths from the root of the tree to directories to skip. PRUNE_PATHS = set([ # Placeholder directory only, not third-party code. os.path.join('third_party','adobe'), # Will remove it once converted private sdk using cipd. os.path.join('third_party','android_tools_internal'), # Build files only, not third-party code. os.path.join('third_party','widevine'), # Only binaries, used during development. os.path.join('third_party','valgrind'), # Used for development and test, not in the shipping product. os.path.join('build','secondary'), os.path.join('third_party','bison'), os.path.join('third_party','blanketjs'), os.path.join('third_party','chromite'), os.path.join('third_party','cygwin'), os.path.join('third_party','gles2_conform'), os.path.join('third_party','gnu_binutils'), os.path.join('third_party','gold'), os.path.join('third_party','gperf'), os.path.join('third_party','lighttpd'), os.path.join('third_party','llvm'), os.path.join('third_party','llvm-build'), os.path.join('third_party','mingw-w64'), os.path.join('third_party','nacl_sdk_binaries'), os.path.join('third_party','pefile'), os.path.join('third_party','perl'), os.path.join('third_party','psyco_win32'), os.path.join('third_party','pyelftools'), os.path.join('third_party','pylib'), os.path.join('third_party','pywebsocket'), os.path.join('third_party','syzygy'), # Chromium code. os.path.join('tools', 'swarming_client'), # Stuff pulled in from chrome-internal for official builds/tools. os.path.join('third_party', 'clear_cache'), os.path.join('third_party', 'gnu'), os.path.join('third_party', 'googlemac'), os.path.join('third_party', 'pcre'), os.path.join('third_party', 'psutils'), os.path.join('third_party', 'sawbuck'), # See crbug.com/350472 os.path.join('chrome', 'browser', 'resources', 'chromeos', 'quickoffice'), # Chrome for Android proprietary code. os.path.join('clank'), # Redistribution does not require attribution in documentation. os.path.join('third_party','directxsdk'), # For testing only, presents on some bots. os.path.join('isolate_deps_dir'), # Mock test data. os.path.join('tools', 'binary_size', 'libsupersize', 'testdata'), # Overrides some WebRTC files, same license. Skip this one. os.path.join('third_party', 'webrtc_overrides'), ]) # Directories we don't scan through. VCS_METADATA_DIRS = ('.svn', '.git') PRUNE_DIRS = (VCS_METADATA_DIRS + ('out', 'Debug', 'Release', # build files 'layout_tests')) # lots of subdirs # A third_party directory can define this file, containing a list of # subdirectories to process in addition to itself. Intended for directories # that contain multiple others as transitive dependencies. ADDITIONAL_PATHS_FILENAME = 'additional_readme_paths.json' ADDITIONAL_PATHS = ( os.path.join('chrome', 'common', 'extensions', 'docs', 'examples'), os.path.join('chrome', 'test', 'chromeos', 'autotest'), os.path.join('chrome', 'test', 'data'), os.path.join('native_client'), os.path.join('testing', 'gmock'), os.path.join('testing', 'gtest'), os.path.join('third_party', 'boringssl', 'src', 'third_party', 'fiat'), os.path.join('tools', 'gyp'), os.path.join('tools', 'page_cycler', 'acid3'), os.path.join('url', 'third_party', 'mozilla'), os.path.join('v8'), # Fake directories to include the strongtalk and fdlibm licenses. os.path.join('v8', 'strongtalk'), os.path.join('v8', 'fdlibm'), ) # Directories where we check out directly from upstream, and therefore # can't provide a README.chromium. Please prefer a README.chromium # wherever possible. SPECIAL_CASES = { os.path.join('native_client'): { "Name": "native client", "URL": "http://code.google.com/p/nativeclient", "License": "BSD", }, os.path.join('testing', 'gmock'): { "Name": "gmock", "URL": "http://code.google.com/p/googlemock", "License": "BSD", "License File": "NOT_SHIPPED", }, os.path.join('testing', 'gtest'): { "Name": "gtest", "URL": "http://code.google.com/p/googletest", "License": "BSD", "License File": "NOT_SHIPPED", }, os.path.join('third_party', 'angle'): { "Name": "Almost Native Graphics Layer Engine", "URL": "http://code.google.com/p/angleproject/", "License": "BSD", }, os.path.join('third_party', 'angle', 'third_party', 'vulkan-headers'): { "Name": "Vulkan-Headers", "URL": "https://github.com/KhronosGroup/Vulkan-Headers", "License": "Apache 2.0", "License File": "src/LICENSE.txt", }, os.path.join('third_party', 'cros_system_api'): { "Name": "Chromium OS system API", "URL": "http://www.chromium.org/chromium-os", "License": "BSD", # Absolute path here is resolved as relative to the source root. "License File": "/LICENSE.chromium_os", }, os.path.join('third_party', 'lss'): { "Name": "linux-syscall-support", "URL": "http://code.google.com/p/linux-syscall-support/", "License": "BSD", "License File": "/LICENSE", }, os.path.join('third_party', 'pdfium'): { "Name": "PDFium", "URL": "http://code.google.com/p/pdfium/", "License": "BSD", }, os.path.join('third_party', 'ppapi'): { "Name": "ppapi", "URL": "http://code.google.com/p/ppapi/", }, os.path.join('third_party', 'scons-2.0.1'): { "Name": "scons-2.0.1", "URL": "http://www.scons.org", "License": "MIT", "License File": "NOT_SHIPPED", }, os.path.join('third_party', 'catapult'): { "Name": "catapult", "URL": "https://github.com/catapult-project/catapult", "License": "BSD", "License File": "NOT_SHIPPED", }, os.path.join('third_party', 'crashpad', 'crashpad', 'third_party', 'lss'): { "Name": "linux-syscall-support", "URL": "https://chromium.googlesource.com/linux-syscall-support/", "License": "BSD", "License File": "NOT_SHIPPED", }, os.path.join('third_party', 'crashpad', 'crashpad', 'third_party', 'mini_chromium'): { "Name": "mini_chromium", "URL": "https://chromium.googlesource.com/chromium/mini_chromium/", "License": "BSD", "License File": "NOT_SHIPPED", }, os.path.join('third_party', 'crashpad', 'crashpad', 'third_party', 'xnu'): { "Name": "xnu", "URL": "https://opensource.apple.com/source/xnu/", "License": "Apple Public Source License 2.0", "License File": "APPLE_LICENSE", }, os.path.join('third_party', 'crashpad', 'crashpad', 'third_party', 'zlib'): { "Name": "zlib", "URL": "https://zlib.net/", "License": "zlib", "License File": "NOT_SHIPPED", }, os.path.join('third_party', 'v8-i18n'): { "Name": "Internationalization Library for v8", "URL": "http://code.google.com/p/v8-i18n/", "License": "Apache 2.0", }, os.path.join('third_party', 'blink'): { # about:credits doesn't show "Blink" but "WebKit". # Blink is a fork of WebKit, and Chromium project has maintained it # since the fork. about:credits needs to mention the code before # the fork. "Name": "WebKit", "URL": "http://webkit.org/", "License": "BSD and LGPL v2 and LGPL v2.1", # Absolute path here is resolved as relative to the source root. "License File": "/third_party/blink/LICENSE_FOR_ABOUT_CREDITS", }, os.path.join('third_party', 'webpagereplay'): { "Name": "webpagereplay", "URL": "http://code.google.com/p/web-page-replay", "License": "Apache 2.0", "License File": "NOT_SHIPPED", }, os.path.join('tools', 'gyp'): { "Name": "gyp", "URL": "http://code.google.com/p/gyp", "License": "BSD", "License File": "NOT_SHIPPED", }, os.path.join('v8'): { "Name": "V8 JavaScript Engine", "URL": "http://code.google.com/p/v8", "License": "BSD", }, os.path.join('v8', 'strongtalk'): { "Name": "Strongtalk", "URL": "http://www.strongtalk.org/", "License": "BSD", # Absolute path here is resolved as relative to the source root. "License File": "/v8/LICENSE.strongtalk", }, os.path.join('v8', 'fdlibm'): { "Name": "fdlibm", "URL": "http://www.netlib.org/fdlibm/", "License": "Freely Distributable", # Absolute path here is resolved as relative to the source root. "License File" : "/v8/LICENSE.fdlibm", "License Android Compatible" : "yes", }, os.path.join('third_party', 'khronos_glcts'): { # These sources are not shipped, are not public, and it isn't # clear why they're tripping the license check. "Name": "khronos_glcts", "URL": "http://no-public-url", "License": "Khronos", "License File": "NOT_SHIPPED", }, os.path.join('tools', 'telemetry', 'third_party', 'gsutil'): { "Name": "gsutil", "URL": "https://cloud.google.com/storage/docs/gsutil", "License": "Apache 2.0", "License File": "NOT_SHIPPED", }, os.path.join('third_party', 'swiftshader'): { "Name": "SwiftShader", "URL": "https://swiftshader.googlesource.com/SwiftShader", "License": "Apache 2.0 and compatible licenses", "License Android Compatible": "yes", "License File": "/third_party/swiftshader/LICENSE.txt", }, } # Special value for 'License File' field used to indicate that the license file # should not be used in about:credits. NOT_SHIPPED = "NOT_SHIPPED" # Paths for libraries that we have checked are not shipped on iOS. These are # left out of the licenses file primarily because we don't want to cause a # firedrill due to someone thinking that Chrome for iOS is using LGPL code # when it isn't. # This is a temporary hack; the real solution is crbug.com/178215 KNOWN_NON_IOS_LIBRARIES = set([ os.path.join('base', 'third_party', 'symbolize'), os.path.join('base', 'third_party', 'xdg_mime'), os.path.join('base', 'third_party', 'xdg_user_dirs'), os.path.join('buildtools', 'third_party', 'libc++'), os.path.join('buildtools', 'third_party', 'libc++abi'), os.path.join('chrome', 'installer', 'mac', 'third_party', 'bsdiff'), os.path.join('chrome', 'installer', 'mac', 'third_party', 'xz'), os.path.join('chrome', 'test', 'data', 'third_party', 'kraken'), os.path.join('chrome', 'test', 'data', 'third_party', 'spaceport'), os.path.join('chrome', 'third_party', 'mock4js'), os.path.join('chrome', 'third_party', 'mozilla_security_manager'), os.path.join('third_party', 'angle'), os.path.join('third_party', 'apple_apsl'), os.path.join('third_party', 'apple_sample_code'), os.path.join('third_party', 'ashmem'), os.path.join('third_party', 'blink'), os.path.join('third_party', 'bspatch'), os.path.join('third_party', 'cacheinvalidation'), os.path.join('third_party', 'cld'), os.path.join('third_party', 'flot'), os.path.join('third_party', 'gtk+'), os.path.join('third_party', 'iaccessible2'), os.path.join('third_party', 'iccjpeg'), os.path.join('third_party', 'isimpledom'), os.path.join('third_party', 'jsoncpp'), os.path.join('third_party', 'khronos'), os.path.join('third_party', 'libXNVCtrl'), os.path.join('third_party', 'libevent'), os.path.join('third_party', 'libjpeg'), os.path.join('third_party', 'libovr'), os.path.join('third_party', 'libusb'), os.path.join('third_party', 'libxslt'), os.path.join('third_party', 'lss'), os.path.join('third_party', 'lzma_sdk'), os.path.join('third_party', 'mesa'), os.path.join('third_party', 'motemplate'), os.path.join('third_party', 'mozc'), os.path.join('third_party', 'mozilla'), os.path.join('third_party', 'npapi'), os.path.join('third_party', 'ots'), os.path.join('third_party', 'perfetto'), os.path.join('third_party', 'ppapi'), os.path.join('third_party', 'qcms'), os.path.join('third_party', 're2'), os.path.join('third_party', 'safe_browsing'), os.path.join('third_party', 'smhasher'), os.path.join('third_party', 'sudden_motion_sensor'), os.path.join('third_party', 'swiftshader'), os.path.join('third_party', 'swig'), os.path.join('third_party', 'talloc'), os.path.join('third_party', 'tcmalloc'), os.path.join('third_party', 'usb_ids'), os.path.join('third_party', 'v8-i18n'), os.path.join('third_party', 'wtl'), os.path.join('third_party', 'yasm'), os.path.join('v8', 'strongtalk'), ]) class LicenseError(Exception): """We raise this exception when a directory's licensing info isn't fully filled out.""" pass def AbsolutePath(path, filename, root): """Convert a path in README.chromium to be absolute based on the source root.""" if filename.startswith('/'): # Absolute-looking paths are relative to the source root # (which is the directory we're run from). absolute_path = os.path.join(root, filename[1:]) else: absolute_path = os.path.join(root, path, filename) if os.path.exists(absolute_path): return absolute_path return None def ParseDir(path, root, require_license_file=True, optional_keys=None): """Examine a third_party/foo component and extract its metadata.""" # Parse metadata fields out of README.chromium. # We examine "LICENSE" for the license file by default. metadata = { "License File": "LICENSE", # Relative path to license text. "Name": None, # Short name (for header on about:credits). "URL": None, # Project home page. "License": None, # Software license. } if optional_keys is None: optional_keys = [] if path in SPECIAL_CASES: metadata.update(SPECIAL_CASES[path]) else: # Try to find README.chromium. readme_path = os.path.join(root, path, 'README.chromium') if not os.path.exists(readme_path): raise LicenseError("missing README.chromium or licenses.py " "SPECIAL_CASES entry in %s\n" % path) for line in open(readme_path): line = line.strip() if not line: break for key in list(metadata.keys()) + optional_keys: field = key + ": " if line.startswith(field): metadata[key] = line[len(field):] # Check that all expected metadata is present. errors = [] for key, value in metadata.items(): if not value: errors.append("couldn't find '" + key + "' line " "in README.chromium or licences.py " "SPECIAL_CASES") # Special-case modules that aren't in the shipping product, so don't need # their license in about:credits. if metadata["License File"] != NOT_SHIPPED: # Check that the license file exists. for filename in (metadata["License File"], "COPYING"): license_path = AbsolutePath(path, filename, root) if license_path is not None: break if require_license_file and not license_path: errors.append("License file not found. " "Either add a file named LICENSE, " "import upstream's COPYING if available, " "or add a 'License File:' line to " "README.chromium with the appropriate path.") metadata["License File"] = license_path if errors: raise LicenseError("Errors in %s:\n %s\n" % (path, ";\n ".join(errors))) return metadata def ContainsFiles(path, root): """Determines whether any files exist in a directory or in any of its subdirectories.""" for _, dirs, files in os.walk(os.path.join(root, path)): if files: return True for vcs_metadata in VCS_METADATA_DIRS: if vcs_metadata in dirs: dirs.remove(vcs_metadata) return False def FilterDirsWithFiles(dirs_list, root): # If a directory contains no files, assume it's a DEPS directory for a # project not used by our current configuration and skip it. return [x for x in dirs_list if ContainsFiles(x, root)] def FindThirdPartyDirs(prune_paths, root): """Find all third_party directories underneath the source root.""" third_party_dirs = set() for path, dirs, files in os.walk(root): path = path[len(root)+1:] # Pretty up the path. if path in prune_paths: dirs[:] = [] continue # Prune out directories we want to skip. # (Note that we loop over PRUNE_DIRS so we're not iterating over a # list that we're simultaneously mutating.) for skip in PRUNE_DIRS: if skip in dirs: dirs.remove(skip) if os.path.basename(path) == 'third_party': # Add all subdirectories that are not marked for skipping. for dir in dirs: dirpath = os.path.join(path, dir) additional_paths_file = os.path.join( root, dirpath, ADDITIONAL_PATHS_FILENAME) if dirpath not in prune_paths: third_party_dirs.add(dirpath) if os.path.exists(additional_paths_file): with open(additional_paths_file) as paths_file: extra_paths = json.load(paths_file) third_party_dirs.update([ os.path.join(dirpath, p) for p in extra_paths]) # Don't recurse into any subdirs from here. dirs[:] = [] continue # Don't recurse into paths in ADDITIONAL_PATHS, like we do with regular # third_party/foo paths. if path in ADDITIONAL_PATHS: dirs[:] = [] for dir in ADDITIONAL_PATHS: if dir not in prune_paths: third_party_dirs.add(dir) return third_party_dirs def FindThirdPartyDirsWithFiles(root): third_party_dirs = FindThirdPartyDirs(PRUNE_PATHS, root) return FilterDirsWithFiles(third_party_dirs, root) # Many builders do not contain 'gn' in their PATH, so use the GN binary from # //buildtools. def _GnBinary(): exe = 'gn' if sys.platform.startswith('linux'): subdir = 'linux64' elif sys.platform == 'darwin': subdir = 'mac' elif sys.platform == 'win32': subdir, exe = 'win', 'gn.exe' else: raise RuntimeError("Unsupported platform '%s'." % sys.platform) return os.path.join(_REPOSITORY_ROOT, 'buildtools', subdir, exe) def GetThirdPartyDepsFromGNDepsOutput(gn_deps, target_os): """Returns third_party/foo directories given the output of "gn desc deps". Note that it always returns the direct sub-directory of third_party where README.chromium and LICENSE files are, so that it can be passed to ParseDir(). e.g.: third_party/cld_3/src/src/BUILD.gn -> third_party/cld_3 It returns relative paths from _REPOSITORY_ROOT, not absolute paths. """ third_party_deps = set() for absolute_build_dep in gn_deps.split(): relative_build_dep = os.path.relpath( absolute_build_dep, _REPOSITORY_ROOT) m = re.search( r'^((.+[/\\])?third_party[/\\][^/\\]+[/\\])(.+[/\\])?BUILD\.gn$', relative_build_dep) if not m: continue third_party_path = m.group(1) if any(third_party_path.startswith(p + os.sep) for p in PRUNE_PATHS): continue if (target_os == 'ios' and any(third_party_path.startswith(p + os.sep) for p in KNOWN_NON_IOS_LIBRARIES)): # Skip over files that are known not to be used on iOS. continue third_party_deps.add(third_party_path[:-1]) return third_party_deps def FindThirdPartyDeps(gn_out_dir, gn_target, target_os): if not gn_out_dir: raise RuntimeError("--gn-out-dir is required if --gn-target is used.") # Generate gn project in temp directory and use it to find dependencies. # Current gn directory cannot be used when we run this script in a gn action # rule, because gn doesn't allow recursive invocations due to potential side # effects. tmp_dir = None try: tmp_dir = tempfile.mkdtemp(dir = gn_out_dir) shutil.copy(os.path.join(gn_out_dir, "args.gn"), tmp_dir) subprocess.check_output([_GnBinary(), "gen", tmp_dir]) gn_deps = subprocess.check_output([ _GnBinary(), "desc", tmp_dir, gn_target, "deps", "--as=buildfile", "--all"]) if isinstance(gn_deps, bytes): gn_deps = gn_deps.decode("utf-8") finally: if tmp_dir and os.path.exists(tmp_dir): shutil.rmtree(tmp_dir) return GetThirdPartyDepsFromGNDepsOutput(gn_deps, target_os) def ScanThirdPartyDirs(root=None): """Scan a list of directories and report on any problems we find.""" if root is None: root = os.getcwd() third_party_dirs = FindThirdPartyDirsWithFiles(root) errors = [] for path in sorted(third_party_dirs): try: metadata = ParseDir(path, root) except LicenseError as e: errors.append((path, e.args[0])) continue for path, error in sorted(errors): print(path + ": " + error) return len(errors) == 0 def GenerateCredits( file_template_file, entry_template_file, output_file, target_os, gn_out_dir, gn_target, depfile=None): """Generate about:credits.""" def EvaluateTemplate(template, env, escape=True): """Expand a template with variables like {{foo}} using a dictionary of expansions.""" for key, val in env.items(): if escape: val = html.escape(val) val = val.replace("*/", "* /") template = template.replace('{{%s}}' % key, val) return template def MetadataToTemplateEntry(metadata, entry_template): env = { 'name': metadata['Name'], 'name-sanitized': metadata['Name'].replace(' ', '-'), 'url': metadata['URL'], 'license': open(metadata['License File']).read(), 'license-type': metadata['License'] } return { 'name': metadata['Name'], 'content': EvaluateTemplate(entry_template, env), 'license_file': metadata['License File'], } if gn_target: third_party_dirs = FindThirdPartyDeps(gn_out_dir, gn_target, target_os) # Sanity-check to raise a build error if invalid gn_... settings are # somehow passed to this script. if not third_party_dirs: raise RuntimeError("No deps found.") else: third_party_dirs = FindThirdPartyDirs(PRUNE_PATHS, _REPOSITORY_ROOT) if not file_template_file: file_template_file = os.path.join(_REPOSITORY_ROOT, 'components', 'about_ui', 'resources', 'about_credits.tmpl') if not entry_template_file: entry_template_file = os.path.join(_REPOSITORY_ROOT, 'components', 'about_ui', 'resources', 'about_credits_entry.tmpl') entry_template = open(entry_template_file).read() entries = [] # Start from Chromium's LICENSE file chromium_license_metadata = { 'Name': 'The Chromium Project', 'URL': 'http://www.chromium.org', 'License': 'BSD 3-clause "New" or "Revised" License', 'License File': os.path.join(_REPOSITORY_ROOT, 'LICENSE') } entries.append(MetadataToTemplateEntry(chromium_license_metadata, entry_template)) for path in third_party_dirs: try: metadata = ParseDir(path, _REPOSITORY_ROOT) except LicenseError: # TODO(phajdan.jr): Convert to fatal error (http://crbug.com/39240). continue if metadata['License File'] == NOT_SHIPPED: continue if target_os == 'ios' and not gn_target: # Skip over files that are known not to be used on iOS. But # skipping is unnecessary if GN was used to query the actual # dependencies. # TODO(lambroslambrou): Remove this step once the iOS build is # updated to provide --gn-target to this script. if path in KNOWN_NON_IOS_LIBRARIES: continue entries.append(MetadataToTemplateEntry(metadata, entry_template)) entries.sort(key=lambda entry: (entry['name'].lower(), entry['content'])) for entry_id, entry in enumerate(entries): entry['content'] = entry['content'].replace('{{id}}', str(entry_id)) entries_contents = '\n'.join([entry['content'] for entry in entries]) file_template = open(file_template_file).read() template_contents = "" template_contents += EvaluateTemplate(file_template, {'entries': entries_contents}, escape=False) if output_file: changed = True try: old_output = open(output_file, 'r').read() if old_output == template_contents: changed = False except: pass if changed: with open(output_file, 'w') as output: output.write(template_contents) else: print(template_contents) if depfile: assert output_file # Add in build.ninja so that the target will be considered dirty whenever # gn gen is run. Otherwise, it will fail to notice new files being added. # This is still no perfect, as it will fail if no build files are changed, # but a new README.chromium / LICENSE is added. This shouldn't happen in # practice however. license_file_list = (entry['license_file'] for entry in entries) license_file_list = (os.path.relpath(p) for p in license_file_list) license_file_list = sorted(set(license_file_list)) build_utils.WriteDepfile(depfile, output_file, license_file_list + ['build.ninja']) return True def _ReadFile(path): """Reads a file from disk. Args: path: The path of the file to read, relative to the root of the repository. Returns: The contents of the file as a string. """ with codecs.open(os.path.join(_REPOSITORY_ROOT, path), 'r', 'utf-8') as f: return f.read() def GenerateLicenseFile(output_file, gn_out_dir, gn_target, target_os): """Generate a plain-text LICENSE file which can be used when you ship a part of Chromium code (specified by gn_target) as a stand-alone library (e.g., //ios/web_view). The LICENSE file contains licenses of both Chromium and third-party libraries which gn_target depends on. """ third_party_dirs = FindThirdPartyDeps(gn_out_dir, gn_target, target_os) # Start with Chromium's LICENSE file. content = [_ReadFile('LICENSE')] # Add necessary third_party. for directory in sorted(third_party_dirs): metadata = ParseDir( directory, _REPOSITORY_ROOT, require_license_file=True) content.append('-' * 20) content.append(directory.split(os.sep)[-1]) content.append('-' * 20) license_file = metadata['License File'] if license_file and license_file != NOT_SHIPPED: content.append(_ReadFile(license_file)) content_text = '\n'.join(content) if output_file: with codecs.open(output_file, 'w', 'utf-8') as output: output.write(content_text) else: print(content_text) def main(): parser = argparse.ArgumentParser() parser.add_argument('--file-template', help='Template HTML to use for the license page.') parser.add_argument('--entry-template', help='Template HTML to use for each license.') parser.add_argument('--target-os', help='OS that this build is targeting.') parser.add_argument('--gn-out-dir', help='GN output directory for scanning dependencies.') parser.add_argument('--gn-target', help='GN target to scan for dependencies.') parser.add_argument('command', choices=['help', 'scan', 'credits', 'license_file']) parser.add_argument('output_file', nargs='?') build_utils.AddDepfileOption(parser) args = parser.parse_args() if args.command == 'scan': if not ScanThirdPartyDirs(): return 1 elif args.command == 'credits': if not GenerateCredits(args.file_template, args.entry_template, args.output_file, args.target_os, args.gn_out_dir, args.gn_target, args.depfile): return 1 elif args.command == 'license_file': try: GenerateLicenseFile( args.output_file, args.gn_out_dir, args.gn_target, args.target_os) except LicenseError as e: print("Failed to parse README.chromium: {}".format(e)) return 1 else: print(__doc__) return 1 if __name__ == '__main__': sys.exit(main())