| #!/usr/bin/env vpython3 |
| |
| # Copyright 2016 The WebRTC project authors. All Rights Reserved. |
| # |
| # Use of this source code is governed by a BSD-style license |
| # that can be found in the LICENSE file in the root of the source |
| # tree. An additional intellectual property rights grant can be found |
| # in the file PATENTS. All contributing project authors may |
| # be found in the AUTHORS file in the root of the source tree. |
| """Generates license markdown for a prebuilt version of WebRTC. |
| |
| Licenses are taken from dependent libraries which are determined by |
| GN desc command `gn desc` on all targets specified via `--target` argument. |
| |
| One can see all dependencies by invoking this command: |
| $ gn.py desc --all --format=json <out_directory> <target> | \ |
| vpython3 -m json.tool |
| (see "deps" subarray) |
| |
| Libraries are mapped to licenses via LIB_TO_LICENSES_DICT dictionary. |
| |
| """ |
| |
| import sys |
| import argparse |
| import json |
| import logging |
| import os |
| import re |
| import subprocess |
| from html import escape |
| |
| # Third_party library to licences mapping. Keys are names of the libraries |
| # (right after the `third_party/` prefix) |
| LIB_TO_LICENSES_DICT = { |
| 'abseil-cpp': ['third_party/abseil-cpp/LICENSE'], |
| 'android_ndk': ['third_party/android_ndk/NOTICE'], |
| 'android_sdk': ['third_party/android_sdk/LICENSE'], |
| 'auto': [ |
| 'third_party/android_deps/libs/' |
| 'com_google_auto_service_auto_service/LICENSE' |
| ], |
| 'boringssl': ['third_party/boringssl/src/LICENSE'], |
| 'crc32c': ['third_party/crc32c/src/LICENSE'], |
| 'cpu_features': ['third_party/cpu_features/src/LICENSE'], |
| 'dav1d': ['third_party/dav1d/LICENSE'], |
| 'errorprone': [ |
| 'third_party/android_deps/libs/' |
| 'com_google_errorprone_error_prone_core/LICENSE' |
| ], |
| 'fiat': ['third_party/boringssl/src/third_party/fiat/LICENSE'], |
| 'guava': ['third_party/android_deps/libs/com_google_guava_guava/LICENSE'], |
| 'ijar': ['third_party/ijar/LICENSE'], |
| 'jsoncpp': ['third_party/jsoncpp/LICENSE'], |
| 'libaom': ['third_party/libaom/source/libaom/LICENSE'], |
| 'libc++': ['buildtools/third_party/libc++/trunk/LICENSE.TXT'], |
| 'libc++abi': ['buildtools/third_party/libc++abi/trunk/LICENSE.TXT'], |
| 'libevent': ['third_party/libevent/LICENSE'], |
| 'libjpeg_turbo': ['third_party/libjpeg_turbo/LICENSE.md'], |
| 'libsrtp': ['third_party/libsrtp/LICENSE'], |
| 'libunwind': ['buildtools/third_party/libunwind/trunk/LICENSE.TXT'], |
| 'libvpx': ['third_party/libvpx/source/libvpx/LICENSE'], |
| 'libyuv': ['third_party/libyuv/LICENSE'], |
| 'nasm': ['third_party/nasm/LICENSE'], |
| 'opus': ['third_party/opus/src/COPYING'], |
| 'pffft': ['third_party/pffft/LICENSE'], |
| 'protobuf': ['third_party/protobuf/LICENSE'], |
| 'rnnoise': ['third_party/rnnoise/COPYING'], |
| 'webrtc': ['LICENSE'], |
| 'zlib': ['third_party/zlib/LICENSE'], |
| 'base64': ['rtc_base/third_party/base64/LICENSE'], |
| 'sigslot': ['rtc_base/third_party/sigslot/LICENSE'], |
| 'portaudio': ['modules/third_party/portaudio/LICENSE'], |
| 'fft': ['modules/third_party/fft/LICENSE'], |
| 'g711': ['modules/third_party/g711/LICENSE'], |
| 'g722': ['modules/third_party/g722/LICENSE'], |
| 'ooura': ['common_audio/third_party/ooura/LICENSE'], |
| 'spl_sqrt_floor': ['common_audio/third_party/spl_sqrt_floor/LICENSE'], |
| 'kotlin_stdlib': ['third_party/kotlin_stdlib/LICENSE'], |
| |
| # TODO(bugs.webrtc.org/1110): Remove this hack. This is not a lib. |
| # For some reason it is listed as so in _GetThirdPartyLibraries. |
| 'android_deps': [], |
| # This is not a library but a collection of libraries. |
| 'androidx': [], |
| |
| # Compile time dependencies, no license needed: |
| 'ow2_asm': [], |
| 'jdk': [], |
| } |
| |
| # Third_party library _regex_ to licences mapping. Keys are regular expression |
| # with names of the libraries (right after the `third_party/` prefix) |
| LIB_REGEX_TO_LICENSES_DICT = { |
| 'android_deps:android_support_annotations.*': [ |
| 'third_party/android_deps/libs/' + |
| 'com_android_support_support_annotations/LICENSE' |
| ], |
| |
| # Internal dependencies, licenses are already included by other dependencies |
| 'android_deps:com_android_support_support_annotations.*': [], |
| } |
| |
| |
| SCRIPT_DIR = os.path.dirname(os.path.realpath(__file__)) |
| WEBRTC_ROOT = os.path.abspath(os.path.join(SCRIPT_DIR, os.pardir, os.pardir)) |
| SRC_DIR = os.path.dirname(os.path.dirname(SCRIPT_DIR)) |
| |
| # Chromium, and potentially other repositories, embed us in the location |
| # "//third_party/webrtc". When this is the case, we expect that some of the |
| # tools we need are *actually* in their build folder, thus we need to move up |
| # to the *true* source root, when we're embedded like this. |
| if SRC_DIR.endswith(os.path.join('third_party', 'webrtc')): |
| SRC_DIR = os.path.abspath(os.path.join(SRC_DIR, os.pardir, os.pardir)) |
| sys.path.append(os.path.join(SRC_DIR, 'build')) |
| import find_depot_tools |
| |
| THIRD_PARTY_LIB_SIMPLE_NAME_REGEX = r'^.*/third_party/([\w\-+]+).*$' |
| THIRD_PARTY_LIB_REGEX_TEMPLATE = r'^.*/third_party/%s$' |
| |
| |
| class LicenseBuilder: |
| def __init__(self, |
| buildfile_dirs, |
| targets, |
| lib_to_licenses_dict=None, |
| lib_regex_to_licenses_dict=None): |
| if lib_to_licenses_dict is None: |
| lib_to_licenses_dict = LIB_TO_LICENSES_DICT |
| |
| if lib_regex_to_licenses_dict is None: |
| lib_regex_to_licenses_dict = LIB_REGEX_TO_LICENSES_DICT |
| |
| self.buildfile_dirs = buildfile_dirs |
| self.targets = targets |
| self.lib_to_licenses_dict = lib_to_licenses_dict |
| self.lib_regex_to_licenses_dict = lib_regex_to_licenses_dict |
| |
| self.common_licenses_dict = self.lib_to_licenses_dict.copy() |
| self.common_licenses_dict.update(self.lib_regex_to_licenses_dict) |
| |
| @staticmethod |
| def _ParseLibraryName(dep): |
| """Returns library name after third_party |
| |
| Input one of: |
| //a/b/third_party/libname:c |
| //a/b/third_party/libname:c(//d/e/f:g) |
| //a/b/third_party/libname/c:d(//e/f/g:h) |
| |
| Outputs libname or None if this is not a third_party dependency. |
| """ |
| groups = re.match(THIRD_PARTY_LIB_SIMPLE_NAME_REGEX, dep) |
| return groups.group(1) if groups else None |
| |
| def _ParseLibrary(self, dep): |
| """Returns library simple or regex name that matches `dep` after third_party |
| |
| This method matches `dep` dependency against simple names in |
| LIB_TO_LICENSES_DICT and regular expression names in |
| LIB_REGEX_TO_LICENSES_DICT keys |
| |
| Outputs matched dict key or None if this is not a third_party dependency. |
| """ |
| libname = LicenseBuilder._ParseLibraryName(dep) |
| |
| for lib_regex in self.lib_regex_to_licenses_dict: |
| if re.match(THIRD_PARTY_LIB_REGEX_TEMPLATE % lib_regex, dep): |
| return lib_regex |
| |
| return libname |
| |
| @staticmethod |
| def _RunGN(buildfile_dir, target): |
| cmd = [ |
| sys.executable, |
| os.path.join(find_depot_tools.DEPOT_TOOLS_PATH, 'gn.py'), |
| 'desc', |
| '--all', |
| '--format=json', |
| os.path.abspath(buildfile_dir), |
| target, |
| ] |
| logging.debug('Running: %r', cmd) |
| output_json = subprocess.check_output(cmd, cwd=WEBRTC_ROOT).decode('UTF-8') |
| logging.debug('Output: %s', output_json) |
| return output_json |
| |
| def _GetThirdPartyLibraries(self, buildfile_dir, target): |
| output = json.loads(LicenseBuilder._RunGN(buildfile_dir, target)) |
| libraries = set() |
| for described_target in list(output.values()): |
| third_party_libs = (self._ParseLibrary(dep) |
| for dep in described_target['deps']) |
| libraries |= set(lib for lib in third_party_libs if lib) |
| return libraries |
| |
| def GenerateLicenseText(self, output_dir): |
| # Get a list of third_party libs from gn. For fat libraries we must consider |
| # all architectures, hence the multiple buildfile directories. |
| third_party_libs = set() |
| for buildfile in self.buildfile_dirs: |
| for target in self.targets: |
| third_party_libs |= self._GetThirdPartyLibraries(buildfile, target) |
| assert len(third_party_libs) > 0 |
| |
| missing_licenses = third_party_libs - set(self.common_licenses_dict.keys()) |
| if missing_licenses: |
| error_msg = 'Missing licenses for following third_party targets: %s' % \ |
| ', '.join(sorted(missing_licenses)) |
| logging.error(error_msg) |
| raise Exception(error_msg) |
| |
| # Put webrtc at the front of the list. |
| license_libs = sorted(third_party_libs) |
| license_libs.insert(0, 'webrtc') |
| |
| logging.info('List of licenses: %s', ', '.join(license_libs)) |
| |
| # Generate markdown. |
| output_license_file = open(os.path.join(output_dir, 'LICENSE.md'), 'w+') |
| for license_lib in license_libs: |
| if len(self.common_licenses_dict[license_lib]) == 0: |
| logging.info('Skipping compile time or internal dependency: %s', |
| license_lib) |
| continue # Compile time dependency |
| |
| output_license_file.write('# %s\n' % license_lib) |
| output_license_file.write('```\n') |
| for path in self.common_licenses_dict[license_lib]: |
| license_path = os.path.join(WEBRTC_ROOT, path) |
| with open(license_path, 'r') as license_file: |
| license_text = escape(license_file.read(), quote=True) |
| output_license_file.write(license_text) |
| output_license_file.write('\n') |
| output_license_file.write('```\n\n') |
| |
| output_license_file.close() |
| |
| |
| def main(): |
| parser = argparse.ArgumentParser(description='Generate WebRTC LICENSE.md') |
| parser.add_argument('--verbose', |
| action='store_true', |
| default=False, |
| help='Debug logging.') |
| parser.add_argument('--target', |
| required=True, |
| action='append', |
| default=[], |
| help='Name of the GN target to generate a license for') |
| parser.add_argument('output_dir', help='Directory to output LICENSE.md to.') |
| parser.add_argument('buildfile_dirs', |
| nargs='+', |
| help='Directories containing gn generated ninja files') |
| args = parser.parse_args() |
| |
| logging.basicConfig(level=logging.DEBUG if args.verbose else logging.INFO) |
| |
| builder = LicenseBuilder(args.buildfile_dirs, args.target) |
| builder.GenerateLicenseText(args.output_dir) |
| |
| |
| if __name__ == '__main__': |
| sys.exit(main()) |