#!/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.) """ import cgi import os import sys # Paths from the root of the tree to directories to skip. PRUNE_PATHS = set([ # Same module occurs in crypto/third_party/nss and net/third_party/nss, so # skip this one. os.path.join('third_party','nss'), # Placeholder directory only, not third-party code. os.path.join('third_party','adobe'), # 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','cygwin'), 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','pylib'), os.path.join('third_party','pywebsocket'), os.path.join('third_party','qunit'), os.path.join('third_party','sinonjs'), os.path.join('third_party','syzygy'), os.path.join('tools', 'profile_chrome', 'third_party'), # Chromium code in third_party. os.path.join('third_party','fuzzymatch'), 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'), # Redistribution does not require attribution in documentation. os.path.join('third_party','directxsdk'), os.path.join('third_party','platformsdk_win2008_6_1'), os.path.join('third_party','platformsdk_win7'), ]) # 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 ADDITIONAL_PATHS = ( os.path.join('breakpad'), 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('net', 'tools', 'spdyshark'), os.path.join('sdch', 'open-vcdiff'), os.path.join('testing', 'gmock'), os.path.join('testing', 'gtest'), os.path.join('tools', 'grit'), 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('sdch', 'open-vcdiff'): { "Name": "open-vcdiff", "URL": "http://code.google.com/p/open-vcdiff", "License": "Apache 2.0, MIT, GPL v2 and custom licenses", "License Android Compatible": "yes", }, 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', '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', 'ots'): { "Name": "OTS (OpenType Sanitizer)", "URL": "http://code.google.com/p/ots/", "License": "BSD", }, os.path.join('third_party', 'pdfium'): { "Name": "PDFium", "URL": "http://code.google.com/p/pdfium/", "License": "BSD", }, os.path.join('third_party', 'pdfsqueeze'): { "Name": "pdfsqueeze", "URL": "http://code.google.com/p/pdfsqueeze/", "License": "Apache 2.0", "License File": "COPYING", }, 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', 'trace-viewer'): { "Name": "trace-viewer", "URL": "http://code.google.com/p/trace-viewer", "License": "BSD", "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', 'WebKit'): { "Name": "WebKit", "URL": "http://webkit.org/", "License": "BSD and GPL v2", # Absolute path here is resolved as relative to the source root. "License File": "/third_party/WebKit/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', 'grit'): { "Name": "grit", "URL": "http://code.google.com/p/grit-i18n", "License": "BSD", "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/src/third_party/fdlibm/LICENSE", "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", }, } # Special value for 'License File' field used to indicate that the license file # should not be used in about:credits. NOT_SHIPPED = "NOT_SHIPPED" 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") for line in open(readme_path): line = line.strip() if not line: break for key in metadata.keys() + optional_keys: field = key + ": " if line.startswith(field): metadata[key] = line[len(field):] # Check that all expected metadata is present. for key, value in metadata.iteritems(): if not value: raise LicenseError("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: raise LicenseError("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 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) if dirpath not in prune_paths: third_party_dirs.add(dirpath) # 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 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 = FindThirdPartyDirs(PRUNE_PATHS, root) third_party_dirs = FilterDirsWithFiles(third_party_dirs, root) errors = [] for path in sorted(third_party_dirs): try: metadata = ParseDir(path, root) except LicenseError, e: errors.append((path, e.args[0])) continue for path, error in sorted(errors): print path + ": " + error return len(errors) == 0 def GenerateCredits(): """Generate about:credits.""" if len(sys.argv) not in (2, 3): print 'usage: licenses.py credits [output_file]' return False 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 = cgi.escape(val) template = template.replace('{{%s}}' % key, val) return template root = os.path.join(os.path.dirname(__file__), '..') third_party_dirs = FindThirdPartyDirs(PRUNE_PATHS, root) entry_template = open(os.path.join(root, 'chrome', 'browser', 'resources', 'about_credits_entry.tmpl'), 'rb').read() entries = [] for path in sorted(third_party_dirs): try: metadata = ParseDir(path, root) except LicenseError: # TODO(phajdan.jr): Convert to fatal error (http://crbug.com/39240). continue if metadata['License File'] == NOT_SHIPPED: continue env = { 'name': metadata['Name'], 'url': metadata['URL'], 'license': open(metadata['License File'], 'rb').read(), } entries.append(EvaluateTemplate(entry_template, env)) file_template = open(os.path.join(root, 'chrome', 'browser', 'resources', 'about_credits.tmpl'), 'rb').read() template_contents = "" template_contents += EvaluateTemplate(file_template, {'entries': '\n'.join(entries)}, escape=False) if len(sys.argv) == 3: with open(sys.argv[2], 'w') as output_file: output_file.write(template_contents) elif len(sys.argv) == 2: print template_contents return True def main(): command = 'help' if len(sys.argv) > 1: command = sys.argv[1] if command == 'scan': if not ScanThirdPartyDirs(): return 1 elif command == 'credits': if not GenerateCredits(): return 1 else: print __doc__ return 1 if __name__ == '__main__': sys.exit(main())