| #!/usr/bin/python |
| # Copyright (c) 2010 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 <command> |
| |
| 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 both the top-level third_party and others. |
| os.path.join('base','third_party','icu'), |
| |
| # Assume for now that breakpad has their licensing in order. |
| os.path.join('breakpad'), |
| |
| # This is just a tiny vsprops file, presumably written by the googleurl |
| # authors. Not third-party code. |
| os.path.join('googleurl','third_party','icu'), |
| |
| # Assume for now that native client has their licensing in order. |
| os.path.join('native_client'), |
| |
| # Same module occurs in chrome/ and in net/, so skip one of them. |
| os.path.join('net','third_party','mozilla_security_manager'), |
| |
| # Same module occurs in base/, net/, and src/ so skip all but one of them. |
| os.path.join('third_party','nss'), |
| os.path.join('net','third_party','nss'), |
| |
| # We don't bundle o3d samples into our resulting binaries. |
| os.path.join('o3d','samples'), |
| |
| # Not in the public Chromium tree. |
| os.path.join('third_party','adobe'), |
| |
| # Written as part of Chromium. |
| os.path.join('third_party','fuzzymatch'), |
| |
| # Same license as Chromium. |
| os.path.join('third_party','lss'), |
| |
| # Only binaries, used during development. |
| os.path.join('third_party','valgrind'), |
| |
| # Two directories that are the same as those in base/third_party. |
| os.path.join('v8','src','third_party','dtoa'), |
| os.path.join('v8','src','third_party','valgrind'), |
| |
| # Used for development and test, not in the shipping product. |
| os.path.join('third_party','cygwin'), |
| os.path.join('third_party','lighttpd'), |
| # Filed http://code.google.com/p/nativeclient/issues/detail?id=1323 |
| # to get clarification about using mingw-w64 from NaCl in Chromium: |
| os.path.join('third_party','mingw-w64'), |
| os.path.join('third_party','pefile'), |
| os.path.join('third_party','python_26'), |
| |
| # 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'), |
| |
| # Harfbuzz-ng is not currently shipping in any product: |
| os.path.join('third_party','harfbuzz-ng'), |
| ]) |
| |
| # Directories we don't scan through. |
| PRUNE_DIRS = ('.svn', '.git', # VCS metadata |
| 'out', 'Debug', 'Release', # build files |
| 'layout_tests') # lots of subdirs |
| |
| ADDITIONAL_PATHS = ( |
| # The directory with the word list for Chinese and Japanese segmentation |
| # with different license terms than ICU. |
| os.path.join('third_party','icu','source','data','brkitr'), |
| ) |
| |
| |
| # 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('third_party', 'angle'): { |
| "Name": "Almost Native Graphics Layer Engine", |
| "URL": "http://code.google.com/p/angleproject/", |
| }, |
| os.path.join('third_party', 'lss'): { |
| "Name": "linux-syscall-support", |
| "URL": "http://code.google.com/p/lss/", |
| }, |
| os.path.join('third_party', 'ots'): { |
| "Name": "OTS (OpenType Sanitizer)", |
| "URL": "http://code.google.com/p/ots/", |
| }, |
| os.path.join('third_party', 'ppapi'): { |
| "Name": "ppapi", |
| "URL": "http://code.google.com/p/ppapi/", |
| }, |
| os.path.join('third_party', 'pywebsocket'): { |
| "Name": "pywebsocket", |
| "URL": "http://code.google.com/p/pywebsocket/", |
| }, |
| os.path.join('third_party', 'WebKit'): { |
| "Name": "WebKit", |
| "URL": "http://webkit.org/", |
| # Absolute path here is resolved as relative to the source root. |
| "License File": "/webkit/LICENSE", |
| }, |
| os.path.join('third_party', 'GTM'): { |
| "Name": "Google Toolbox for Mac", |
| "URL": "http://code.google.com/p/google-toolbox-for-mac/", |
| "License File": "COPYING", |
| }, |
| # Filed issue pdfsqueeze:2 with dmaclach to get an honest LICESNE |
| # file in the pdfsqueeze repo. |
| # pdfsqueeze is Apache Licensed, reuse the same file from GTM: |
| os.path.join('third_party', 'pdfsqueeze'): { |
| "Name": "pdfsqueeze", |
| "URL": "http://code.google.com/p/pdfsqueeze/", |
| "License File": os.path.join('..','GTM','COPYING'), |
| }, |
| } |
| |
| class LicenseError(Exception): |
| """We raise this exception when a directory's licensing info isn't |
| fully filled out.""" |
| pass |
| |
| |
| def ParseDir(path): |
| """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. |
| } |
| |
| if path in SPECIAL_CASES: |
| metadata.update(SPECIAL_CASES[path]) |
| else: |
| # Try to find README.chromium. |
| readme_path = os.path.join(path, 'README.chromium') |
| if not os.path.exists(readme_path): |
| raise LicenseError("missing README.chromium") |
| |
| for line in open(readme_path): |
| line = line.strip() |
| if not line: |
| break |
| for key in metadata.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") |
| |
| # Check that the license file exists. |
| for filename in (metadata["License File"], "COPYING"): |
| if filename.startswith('/'): |
| # Absolute-looking paths are relative to the source root |
| # (which is the directory we're run from). |
| license_path = os.path.join(os.getcwd(), filename[1:]) |
| else: |
| license_path = os.path.join(path, filename) |
| if os.path.exists(license_path): |
| metadata["License File"] = license_path |
| break |
| license_path = None |
| |
| if 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.") |
| |
| return metadata |
| |
| |
| def FindThirdPartyDirs(): |
| """Find all third_party directories underneath the current directory.""" |
| third_party_dirs = [] |
| for path, dirs, files in os.walk('.'): |
| path = path[len('./'):] # 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.append(dirpath) |
| |
| # Don't recurse into any subdirs from here. |
| dirs[:] = [] |
| continue |
| |
| for dir in ADDITIONAL_PATHS: |
| third_party_dirs.append(dir) |
| |
| return third_party_dirs |
| |
| def ScanThirdPartyDirs(): |
| """Scan a list of directories and report on any problems we find.""" |
| third_party_dirs = FindThirdPartyDirs() |
| |
| errors = [] |
| for path in sorted(third_party_dirs): |
| try: |
| metadata = ParseDir(path) |
| 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, dumping the result to stdout.""" |
| |
| 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 |
| |
| third_party_dirs = FindThirdPartyDirs() |
| |
| entry_template = open('chrome/browser/resources/about_credits_entry.tmpl', |
| 'rb').read() |
| entries = [] |
| for path in sorted(third_party_dirs): |
| try: |
| metadata = ParseDir(path) |
| except LicenseError: |
| print >>sys.stderr, ("WARNING: licensing info for " + path + |
| " is incomplete, skipping.") |
| continue |
| env = { |
| 'name': metadata['Name'], |
| 'url': metadata['URL'], |
| 'license': open(metadata['License File'], 'rb').read(), |
| } |
| entries.append(EvaluateTemplate(entry_template, env)) |
| |
| file_template = open('chrome/browser/resources/about_credits.tmpl', |
| 'rb').read() |
| print "<!-- Generated by licenses.py; do not edit. -->" |
| print EvaluateTemplate(file_template, {'entries': '\n'.join(entries)}, |
| escape=False) |
| |
| if __name__ == '__main__': |
| command = 'help' |
| if len(sys.argv) > 1: |
| command = sys.argv[1] |
| |
| if command == 'scan': |
| if not ScanThirdPartyDirs(): |
| sys.exit(1) |
| elif command == 'credits': |
| if not GenerateCredits(): |
| sys.exit(1) |
| else: |
| print __doc__ |
| sys.exit(1) |
