Update idlsync.py to pull in dependencies required for chrome api generation.

third_party/chrome/tools/licenses.py

Index: third_party/chrome/tools/licenses.py
diff --git a/third_party/chrome/tools/licenses.py b/third_party/chrome/tools/licenses.py
new file mode 100755
index 0000000000000000000000000000000000000000..10a8d330ec73559bc76c9b8090e411a83e5056da
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+++ b/third_party/chrome/tools/licenses.py
@@ -0,0 +1,469 @@
+#!/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 <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 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('third_party','bison'),
+    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','python_26'),
+    os.path.join('third_party','pywebsocket'),
+    os.path.join('third_party','syzygy'),
+
+    # Chromium code in third_party.
+    os.path.join('third_party','fuzzymatch'),
+
+    # 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.
+PRUNE_DIRS = ('.svn', '.git',             # VCS metadata
+              '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('googleurl'),
+    os.path.join('native_client'),
+    os.path.join('native_client_sdk'),
+    os.path.join('net', 'tools', 'spdyshark'),
+    os.path.join('ppapi'),
+    os.path.join('sandbox', 'linux', 'seccomp-legacy'),
+    os.path.join('sdch', 'open-vcdiff'),
+    os.path.join('testing', 'gmock'),
+    os.path.join('testing', 'gtest'),
+    # 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'),
+    os.path.join('tools', 'grit'),
+    os.path.join('tools', 'gyp'),
+    os.path.join('tools', 'page_cycler', 'acid3'),
+    os.path.join('v8'),
+    # Fake directory so we can include the strongtalk license.
+    os.path.join('v8', 'strongtalk'),
+)
+
+
+# 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('googleurl'): {
+        "Name": "google-url",
+        "URL": "http://code.google.com/p/google-url/",
+        "License": "BSD and MPL 1.1/GPL 2.0/LGPL 2.1",
+        "License File": "LICENSE.txt",
+    },
+    os.path.join('native_client'): {
+        "Name": "native client",
+        "URL": "http://code.google.com/p/nativeclient",
+        "License": "BSD",
+    },
+    os.path.join('sandbox', 'linux', 'seccomp-legacy'): {
+        "Name": "seccompsandbox",
+        "URL": "http://code.google.com/p/seccompsandbox",
+        "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', 'GTM'): {
+        "Name": "Google Toolbox for Mac",
+        "URL": "http://code.google.com/p/google-toolbox-for-mac/",
+        "License": "Apache 2.0",
+        "License File": "COPYING",
+    },
+    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', '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": "/webkit/LICENSE",
+    },
+    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",
+    },
+}
+
+# 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):
+    """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.
+        }
+
+    # Relative path to a file containing some html we're required to place in
+    # about:credits.
+    optional_keys = ["Required Text", "License Android Compatible"]
+
+    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
+
+    if "Required Text" in metadata:
+        required_path = AbsolutePath(path, metadata["Required Text"], root)
+        if required_path is not None:
+            metadata["Required Text"] = required_path
+        else:
+            raise LicenseError("Required text file listed but not found.")
+
+    return metadata
+
+
+def ContainsFiles(path, root):
+    """Determines whether any files exist in a directory or in any of its
+    subdirectories."""
+    for _, _, files in os.walk(os.path.join(root, path)):
+        if files:
+            return True
+    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 = []
+    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.append(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.append(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(root=None):
+    """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 and not key.endswith("_unescaped"):
+                val = cgi.escape(val)
+            template = template.replace('{{%s}}' % key, val)
+        return template
+
+    if root is None:
+      root = os.getcwd()
+    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:
+            print >>sys.stderr, ("WARNING: licensing info for " + path +
+                                 " is incomplete, skipping.")
+            continue
+        if metadata['License File'] == NOT_SHIPPED:
+            print >>sys.stderr, ("Path " + path + " marked as " + NOT_SHIPPED +
+                                 ", skipping.")
+            continue
+        env = {
+            'name': metadata['Name'],
+            'url': metadata['URL'],
+            'license': open(metadata['License File'], 'rb').read(),
+            'license_unescaped': '',
+        }
+        if 'Required Text' in metadata:
+            required_text = open(metadata['Required Text'], 'rb').read()
+            env["license_unescaped"] = required_text
+        entries.append(EvaluateTemplate(entry_template, env))
+
+    file_template = open(os.path.join(root, '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)
+
+
+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())