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dom/canvas/test/webgl-conf/checkout/closure-library/AUTHORS Normal file
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# This is a list of contributors to the Closure Library.
# Names should be added to this file like so:
# Name or Organization <email address>
Google Inc.
Stellar Science Ltd.
Mohamed Mansour <hello@mohamedmansour.com>
Bjorn Tipling <bjorn.tipling@gmail.com>
SameGoal LLC <help@samegoal.com>
Guido Tapia <guido.tapia@gmail.com>
Andrew Mattie <amattie@gmail.com>
Ilia Mirkin <ibmirkin@gmail.com>
Ivan Kozik <ivan.kozik@gmail.com>
Rich Dougherty <rich@rd.gen.nz>
Chad Killingsworth <chadkillingsworth@missouristate.edu>
Dan Pupius <dan.pupius@gmail.com>
Mike Dunn <dunn74@gmail.com>
Kengo Toda <skypencil@gmail.com>

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Closure Library welcomes patches/pulls for features and bugfixes.
For contributors inside Google, follow the instructions given here:
http://go/closure-contributors
For contributors external to Google, follow the instructions given here:
Notes on Contributions to Closure Library
Google Individual Contributor License
In all cases, contributors must sign a contributor license agreement,
either for an individual or corporation, before a patch can be
accepted. Please fill out the agreement for an individual or a
corporation, as appropriate.
https://developers.google.com/open-source/cla/individual
https://developers.google.com/open-source/cla/corporate
If you or your organization is not listed there already, you should
add an entry to the AUTHORS file as part of your patch.
If you plan to add a significant component or large chunk of code, it
is recommended to bring it up on the discussion list for a design
discussion before writing code.
If appropriate, write a unit test that demonstrates your patch. Tests are the
best way to ensure that future contributors do not break your code
accidentally.
To change the Closure Library source, you must submit a pull request
in GitHub. See the GitHub documentation here:
https://help.github.com/categories/63/articles
Closure Library developers monitor outstanding pull requests. They may
request changes on the pull request before accepting. They will also
verify that the CLA has been signed.
Oftentimes, the pull request will not be directly merged, but patched to
the internal Google codebase to verify that unit and integration tests
will Closure pass before submitting (and optionally make changes to
the patch to match style, fix text, or to make the code or comments
clearer). In this case, the issue associated with the pull request
will be closed when the patch pushed to the repository via the MOE
(Make Open Easy) system.
https://code.google.com/p/moe-java/

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dom/canvas/test/webgl-conf/checkout/closure-library/README-Khronos.txt Normal file
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This is a partial snapshot of the Closure library workspace from:
https://github.com/google/closure-library
It contains only the portions needed to type check the ported dEQP
tests, namely:
closure/goog/base.js
closure/goog/deps.js
and supporting scripts in closure/bin/ .
The current version snapshotted here is:
-----
commit 57bdfe0093cc158fb3a58d2c5f7d75ece8c4b45b
Author: Nathan Naze <nanaze@gmail.com>
Date: Fri Apr 24 18:38:26 2015 -0400
fix bad merge

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# Closure Library
Closure Library is a powerful, low-level JavaScript library designed
for building complex and scalable web applications. It is used by many
Google web applications, such as Gmail and Google Docs.
For more information, visit the
[Google Developers](https://developers.google.com/closure/library) or
[GitHub](https://github.com/google/closure-library) sites.

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#!/usr/bin/env python
#
# Copyright 2009 The Closure Library Authors. All Rights Reserved.
#
# Licensed under the Apache License, Version 2.0 (the "License");
# you may not use this file except in compliance with the License.
# You may obtain a copy of the License at
#
# http://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS-IS" BASIS,
# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
# See the License for the specific language governing permissions and
# limitations under the License.
"""Utility for Closure Library dependency calculation.
ClosureBuilder scans source files to build dependency info. From the
dependencies, the script can produce a manifest in dependency order,
a concatenated script, or compiled output from the Closure Compiler.
Paths to files can be expressed as individual arguments to the tool (intended
for use with find and xargs). As a convenience, --root can be used to specify
all JS files below a directory.
usage: %prog [options] [file1.js file2.js ...]
"""
__author__ = 'nnaze@google.com (Nathan Naze)'
import logging
import optparse
import os
import sys
import depstree
import jscompiler
import source
import treescan
def _GetOptionsParser():
"""Get the options parser."""
parser = optparse.OptionParser(__doc__)
parser.add_option('-i',
'--input',
dest='inputs',
action='append',
default=[],
help='One or more input files to calculate dependencies '
'for. The namespaces in this file will be combined with '
'those given with the -n flag to form the set of '
'namespaces to find dependencies for.')
parser.add_option('-n',
'--namespace',
dest='namespaces',
action='append',
default=[],
help='One or more namespaces to calculate dependencies '
'for. These namespaces will be combined with those given '
'with the -i flag to form the set of namespaces to find '
'dependencies for. A Closure namespace is a '
'dot-delimited path expression declared with a call to '
'goog.provide() (e.g. "goog.array" or "foo.bar").')
parser.add_option('--root',
dest='roots',
action='append',
default=[],
help='The paths that should be traversed to build the '
'dependencies.')
parser.add_option('-o',
'--output_mode',
dest='output_mode',
type='choice',
action='store',
choices=['list', 'script', 'compiled'],
default='list',
help='The type of output to generate from this script. '
'Options are "list" for a list of filenames, "script" '
'for a single script containing the contents of all the '
'files, or "compiled" to produce compiled output with '
'the Closure Compiler. Default is "list".')
parser.add_option('-c',
'--compiler_jar',
dest='compiler_jar',
action='store',
help='The location of the Closure compiler .jar file.')
parser.add_option('-f',
'--compiler_flags',
dest='compiler_flags',
default=[],
action='append',
help='Additional flags to pass to the Closure compiler. '
'To pass multiple flags, --compiler_flags has to be '
'specified multiple times.')
parser.add_option('-j',
'--jvm_flags',
dest='jvm_flags',
default=[],
action='append',
help='Additional flags to pass to the JVM compiler. '
'To pass multiple flags, --jvm_flags has to be '
'specified multiple times.')
parser.add_option('--output_file',
dest='output_file',
action='store',
help=('If specified, write output to this path instead of '
'writing to standard output.'))
return parser
def _GetInputByPath(path, sources):
"""Get the source identified by a path.
Args:
path: str, A path to a file that identifies a source.
sources: An iterable collection of source objects.
Returns:
The source from sources identified by path, if found. Converts to
real paths for comparison.
"""
for js_source in sources:
# Convert both to real paths for comparison.
if os.path.realpath(path) == os.path.realpath(js_source.GetPath()):
return js_source
def _GetClosureBaseFile(sources):
"""Given a set of sources, returns the one base.js file.
Note that if zero or two or more base.js files are found, an error message
will be written and the program will be exited.
Args:
sources: An iterable of _PathSource objects.
Returns:
The _PathSource representing the base Closure file.
"""
base_files = [
js_source for js_source in sources if _IsClosureBaseFile(js_source)]
if not base_files:
logging.error('No Closure base.js file found.')
sys.exit(1)
if len(base_files) > 1:
logging.error('More than one Closure base.js files found at these paths:')
for base_file in base_files:
logging.error(base_file.GetPath())
sys.exit(1)
return base_files[0]
def _IsClosureBaseFile(js_source):
"""Returns true if the given _PathSource is the Closure base.js source."""
return (os.path.basename(js_source.GetPath()) == 'base.js' and
js_source.provides == set(['goog']))
class _PathSource(source.Source):
"""Source file subclass that remembers its file path."""
def __init__(self, path):
"""Initialize a source.
Args:
path: str, Path to a JavaScript file. The source string will be read
from this file.
"""
super(_PathSource, self).__init__(source.GetFileContents(path))
self._path = path
def __str__(self):
return 'PathSource %s' % self._path
def GetPath(self):
"""Returns the path."""
return self._path
def _WrapGoogModuleSource(src):
return ('goog.loadModule(function(exports) {{'
'"use strict";'
'{0}'
'\n' # terminate any trailing single line comment.
';return exports'
'}});\n').format(src)
def main():
logging.basicConfig(format=(sys.argv[0] + ': %(message)s'),
level=logging.INFO)
options, args = _GetOptionsParser().parse_args()
# Make our output pipe.
if options.output_file:
out = open(options.output_file, 'w')
else:
out = sys.stdout
sources = set()
logging.info('Scanning paths...')
for path in options.roots:
for js_path in treescan.ScanTreeForJsFiles(path):
sources.add(_PathSource(js_path))
# Add scripts specified on the command line.
for js_path in args:
sources.add(_PathSource(js_path))
logging.info('%s sources scanned.', len(sources))
# Though deps output doesn't need to query the tree, we still build it
# to validate dependencies.
logging.info('Building dependency tree..')
tree = depstree.DepsTree(sources)
input_namespaces = set()
inputs = options.inputs or []
for input_path in inputs:
js_input = _GetInputByPath(input_path, sources)
if not js_input:
logging.error('No source matched input %s', input_path)
sys.exit(1)
input_namespaces.update(js_input.provides)
input_namespaces.update(options.namespaces)
if not input_namespaces:
logging.error('No namespaces found. At least one namespace must be '
'specified with the --namespace or --input flags.')
sys.exit(2)
# The Closure Library base file must go first.
base = _GetClosureBaseFile(sources)
deps = [base] + tree.GetDependencies(input_namespaces)
output_mode = options.output_mode
if output_mode == 'list':
out.writelines([js_source.GetPath() + '\n' for js_source in deps])
elif output_mode == 'script':
for js_source in deps:
src = js_source.GetSource()
if js_source.is_goog_module:
src = _WrapGoogModuleSource(src)
out.write(src + '\n')
elif output_mode == 'compiled':
logging.warning("""\
Closure Compiler now natively understands and orders Closure dependencies and
is prefererred over using this script for performing JavaScript compilation.
Please migrate your codebase.
See:
https://github.com/google/closure-compiler/wiki/Manage-Closure-Dependencies
""")
# Make sure a .jar is specified.
if not options.compiler_jar:
logging.error('--compiler_jar flag must be specified if --output is '
'"compiled"')
sys.exit(2)
# Will throw an error if the compilation fails.
compiled_source = jscompiler.Compile(
options.compiler_jar,
[js_source.GetPath() for js_source in deps],
jvm_flags=options.jvm_flags,
compiler_flags=options.compiler_flags)
logging.info('JavaScript compilation succeeded.')
out.write(compiled_source)
else:
logging.error('Invalid value for --output flag.')
sys.exit(2)
if __name__ == '__main__':
main()

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# Copyright 2009 The Closure Library Authors. All Rights Reserved.
#
# Licensed under the Apache License, Version 2.0 (the "License");
# you may not use this file except in compliance with the License.
# You may obtain a copy of the License at
#
# http://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS-IS" BASIS,
# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
# See the License for the specific language governing permissions and
# limitations under the License.
"""Class to represent a full Closure Library dependency tree.
Offers a queryable tree of dependencies of a given set of sources. The tree
will also do logical validation to prevent duplicate provides and circular
dependencies.
"""
__author__ = 'nnaze@google.com (Nathan Naze)'
class DepsTree(object):
"""Represents the set of dependencies between source files."""
def __init__(self, sources):
"""Initializes the tree with a set of sources.
Args:
sources: A set of JavaScript sources.
Raises:
MultipleProvideError: A namespace is provided by muplitple sources.
NamespaceNotFoundError: A namespace is required but never provided.
"""
self._sources = sources
self._provides_map = dict()
# Ensure nothing was provided twice.
for source in sources:
for provide in source.provides:
if provide in self._provides_map:
raise MultipleProvideError(
provide, [self._provides_map[provide], source])
self._provides_map[provide] = source
# Check that all required namespaces are provided.
for source in sources:
for require in source.requires:
if require not in self._provides_map:
raise NamespaceNotFoundError(require, source)
def GetDependencies(self, required_namespaces):
"""Get source dependencies, in order, for the given namespaces.
Args:
required_namespaces: A string (for one) or list (for one or more) of
namespaces.
Returns:
A list of source objects that provide those namespaces and all
requirements, in dependency order.
Raises:
NamespaceNotFoundError: A namespace is requested but doesn't exist.
CircularDependencyError: A cycle is detected in the dependency tree.
"""
if isinstance(required_namespaces, str):
required_namespaces = [required_namespaces]
deps_sources = []
for namespace in required_namespaces:
for source in DepsTree._ResolveDependencies(
namespace, [], self._provides_map, []):
if source not in deps_sources:
deps_sources.append(source)
return deps_sources
@staticmethod
def _ResolveDependencies(required_namespace, deps_list, provides_map,
traversal_path):
"""Resolve dependencies for Closure source files.
Follows the dependency tree down and builds a list of sources in dependency
order. This function will recursively call itself to fill all dependencies
below the requested namespaces, and then append its sources at the end of
the list.
Args:
required_namespace: String of required namespace.
deps_list: List of sources in dependency order. This function will append
the required source once all of its dependencies are satisfied.
provides_map: Map from namespace to source that provides it.
traversal_path: List of namespaces of our path from the root down the
dependency/recursion tree. Used to identify cyclical dependencies.
This is a list used as a stack -- when the function is entered, the
current namespace is pushed and popped right before returning.
Each recursive call will check that the current namespace does not
appear in the list, throwing a CircularDependencyError if it does.
Returns:
The given deps_list object filled with sources in dependency order.
Raises:
NamespaceNotFoundError: A namespace is requested but doesn't exist.
CircularDependencyError: A cycle is detected in the dependency tree.
"""
source = provides_map.get(required_namespace)
if not source:
raise NamespaceNotFoundError(required_namespace)
if required_namespace in traversal_path:
traversal_path.append(required_namespace) # do this *after* the test
# This must be a cycle.
raise CircularDependencyError(traversal_path)
# If we don't have the source yet, we'll have to visit this namespace and
# add the required dependencies to deps_list.
if source not in deps_list:
traversal_path.append(required_namespace)
for require in source.requires:
# Append all other dependencies before we append our own.
DepsTree._ResolveDependencies(require, deps_list, provides_map,
traversal_path)
deps_list.append(source)
traversal_path.pop()
return deps_list
class BaseDepsTreeError(Exception):
"""Base DepsTree error."""
def __init__(self):
Exception.__init__(self)
class CircularDependencyError(BaseDepsTreeError):
"""Raised when a dependency cycle is encountered."""
def __init__(self, dependency_list):
BaseDepsTreeError.__init__(self)
self._dependency_list = dependency_list
def __str__(self):
return ('Encountered circular dependency:\n%s\n' %
'\n'.join(self._dependency_list))
class MultipleProvideError(BaseDepsTreeError):
"""Raised when a namespace is provided more than once."""
def __init__(self, namespace, sources):
BaseDepsTreeError.__init__(self)
self._namespace = namespace
self._sources = sources
def __str__(self):
source_strs = map(str, self._sources)
return ('Namespace "%s" provided more than once in sources:\n%s\n' %
(self._namespace, '\n'.join(source_strs)))
class NamespaceNotFoundError(BaseDepsTreeError):
"""Raised when a namespace is requested but not provided."""
def __init__(self, namespace, source=None):
BaseDepsTreeError.__init__(self)
self._namespace = namespace
self._source = source
def __str__(self):
msg = 'Namespace "%s" never provided.' % self._namespace
if self._source:
msg += ' Required in %s' % self._source
return msg

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#!/usr/bin/env python
#
# Copyright 2009 The Closure Library Authors. All Rights Reserved.
#
# Licensed under the Apache License, Version 2.0 (the "License");
# you may not use this file except in compliance with the License.
# You may obtain a copy of the License at
#
# http://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS-IS" BASIS,
# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
# See the License for the specific language governing permissions and
# limitations under the License.
"""Generates out a Closure deps.js file given a list of JavaScript sources.
Paths can be specified as arguments or (more commonly) specifying trees
with the flags (call with --help for descriptions).
Usage: depswriter.py [path/to/js1.js [path/to/js2.js] ...]
"""
import logging
import optparse
import os
import posixpath
import shlex
import sys
import source
import treescan
__author__ = 'nnaze@google.com (Nathan Naze)'
def MakeDepsFile(source_map):
"""Make a generated deps file.
Args:
source_map: A dict map of the source path to source.Source object.
Returns:
str, A generated deps file source.
"""
# Write in path alphabetical order
paths = sorted(source_map.keys())
lines = []
for path in paths:
js_source = source_map[path]
# We don't need to add entries that don't provide anything.
if js_source.provides:
lines.append(_GetDepsLine(path, js_source))
return ''.join(lines)
def _GetDepsLine(path, js_source):
"""Get a deps.js file string for a source."""
provides = sorted(js_source.provides)
requires = sorted(js_source.requires)
module = 'true' if js_source.is_goog_module else 'false'
return 'goog.addDependency(\'%s\', %s, %s, %s);\n' % (
path, provides, requires, module)
def _GetOptionsParser():
"""Get the options parser."""
parser = optparse.OptionParser(__doc__)
parser.add_option('--output_file',
dest='output_file',
action='store',
help=('If specified, write output to this path instead of '
'writing to standard output.'))
parser.add_option('--root',
dest='roots',
default=[],
action='append',
help='A root directory to scan for JS source files. '
'Paths of JS files in generated deps file will be '
'relative to this path. This flag may be specified '
'multiple times.')
parser.add_option('--root_with_prefix',
dest='roots_with_prefix',
default=[],
action='append',
help='A root directory to scan for JS source files, plus '
'a prefix (if either contains a space, surround with '
'quotes). Paths in generated deps file will be relative '
'to the root, but preceded by the prefix. This flag '
'may be specified multiple times.')
parser.add_option('--path_with_depspath',
dest='paths_with_depspath',
default=[],
action='append',
help='A path to a source file and an alternate path to '
'the file in the generated deps file (if either contains '
'a space, surround with whitespace). This flag may be '
'specified multiple times.')
return parser
def _NormalizePathSeparators(path):
"""Replaces OS-specific path separators with POSIX-style slashes.
Args:
path: str, A file path.
Returns:
str, The path with any OS-specific path separators (such as backslash on
Windows) replaced with URL-compatible forward slashes. A no-op on systems
that use POSIX paths.
"""
return path.replace(os.sep, posixpath.sep)
def _GetRelativePathToSourceDict(root, prefix=''):
"""Scans a top root directory for .js sources.
Args:
root: str, Root directory.
prefix: str, Prefix for returned paths.
Returns:
dict, A map of relative paths (with prefix, if given), to source.Source
objects.
"""
# Remember and restore the cwd when we're done. We work from the root so
# that paths are relative from the root.
start_wd = os.getcwd()
os.chdir(root)
path_to_source = {}
for path in treescan.ScanTreeForJsFiles('.'):
prefixed_path = _NormalizePathSeparators(os.path.join(prefix, path))
path_to_source[prefixed_path] = source.Source(source.GetFileContents(path))
os.chdir(start_wd)
return path_to_source
def _GetPair(s):
"""Return a string as a shell-parsed tuple. Two values expected."""
try:
# shlex uses '\' as an escape character, so they must be escaped.
s = s.replace('\\', '\\\\')
first, second = shlex.split(s)
return (first, second)
except:
raise Exception('Unable to parse input line as a pair: %s' % s)
def main():
"""CLI frontend to MakeDepsFile."""
logging.basicConfig(format=(sys.argv[0] + ': %(message)s'),
level=logging.INFO)
options, args = _GetOptionsParser().parse_args()
path_to_source = {}
# Roots without prefixes
for root in options.roots:
path_to_source.update(_GetRelativePathToSourceDict(root))
# Roots with prefixes
for root_and_prefix in options.roots_with_prefix:
root, prefix = _GetPair(root_and_prefix)
path_to_source.update(_GetRelativePathToSourceDict(root, prefix=prefix))
# Source paths
for path in args:
path_to_source[path] = source.Source(source.GetFileContents(path))
# Source paths with alternate deps paths
for path_with_depspath in options.paths_with_depspath:
srcpath, depspath = _GetPair(path_with_depspath)
path_to_source[depspath] = source.Source(source.GetFileContents(srcpath))
# Make our output pipe.
if options.output_file:
out = open(options.output_file, 'w')
else:
out = sys.stdout
out.write('// This file was autogenerated by %s.\n' % sys.argv[0])
out.write('// Please do not edit.\n')
out.write(MakeDepsFile(path_to_source))
if __name__ == '__main__':
main()

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# Copyright 2010 The Closure Library Authors. All Rights Reserved.
#
# Licensed under the Apache License, Version 2.0 (the "License");
# you may not use this file except in compliance with the License.
# You may obtain a copy of the License at
#
# http://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS-IS" BASIS,
# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
# See the License for the specific language governing permissions and
# limitations under the License.
"""Utility to use the Closure Compiler CLI from Python."""
import logging
import os
import re
import subprocess
# Pulls just the major and minor version numbers from the first line of
# 'java -version'. Versions are in the format of [0-9]+\.[0-9]+\..* See:
# http://www.oracle.com/technetwork/java/javase/versioning-naming-139433.html
_VERSION_REGEX = re.compile(r'"([0-9]+)\.([0-9]+)')
class JsCompilerError(Exception):
"""Raised if there's an error in calling the compiler."""
pass
def _GetJavaVersionString():
"""Get the version string from the Java VM."""
return subprocess.check_output(['java', '-version'], stderr=subprocess.STDOUT)
def _ParseJavaVersion(version_string):
"""Returns a 2-tuple for the current version of Java installed.
Args:
version_string: String of the Java version (e.g. '1.7.2-ea').
Returns:
The major and minor versions, as a 2-tuple (e.g. (1, 7)).
"""
match = _VERSION_REGEX.search(version_string)
if match:
version = tuple(int(x, 10) for x in match.groups())
assert len(version) == 2
return version
def _JavaSupports32BitMode():
"""Determines whether the JVM supports 32-bit mode on the platform."""
# Suppresses process output to stderr and stdout from showing up in the
# console as we're only trying to determine 32-bit JVM support.
supported = False
try:
devnull = open(os.devnull, 'wb')
return subprocess.call(
['java', '-d32', '-version'], stdout=devnull, stderr=devnull) == 0
except IOError:
pass
else:
devnull.close()
return supported
def _GetJsCompilerArgs(compiler_jar_path, java_version, source_paths,
jvm_flags, compiler_flags):
"""Assembles arguments for call to JsCompiler."""
if java_version < (1, 7):
raise JsCompilerError('Closure Compiler requires Java 1.7 or higher. '
'Please visit http://www.java.com/getjava')
args = ['java']
# Add JVM flags we believe will produce the best performance. See
# https://groups.google.com/forum/#!topic/closure-library-discuss/7w_O9-vzlj4
# Attempt 32-bit mode if available (Java 7 on Mac OS X does not support 32-bit
# mode, for example).
if _JavaSupports32BitMode():
args += ['-d32']
# Prefer the "client" VM.
args += ['-client']
# Add JVM flags, if any
if jvm_flags:
args += jvm_flags
# Add the application JAR.
args += ['-jar', compiler_jar_path]
for path in source_paths:
args += ['--js', path]
# Add compiler flags, if any.
if compiler_flags:
args += compiler_flags
return args
def Compile(compiler_jar_path, source_paths,
jvm_flags=None,
compiler_flags=None):
"""Prepares command-line call to Closure Compiler.
Args:
compiler_jar_path: Path to the Closure compiler .jar file.
source_paths: Source paths to build, in order.
jvm_flags: A list of additional flags to pass on to JVM.
compiler_flags: A list of additional flags to pass on to Closure Compiler.
Returns:
The compiled source, as a string, or None if compilation failed.
"""
java_version = _ParseJavaVersion(_GetJavaVersionString())
args = _GetJsCompilerArgs(
compiler_jar_path, java_version, source_paths, jvm_flags, compiler_flags)
logging.info('Compiling with the following command: %s', ' '.join(args))
try:
return subprocess.check_output(args)
except subprocess.CalledProcessError:
raise JsCompilerError('JavaScript compilation failed.')

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# Copyright 2009 The Closure Library Authors. All Rights Reserved.
#
# Licensed under the Apache License, Version 2.0 (the "License");
# you may not use this file except in compliance with the License.
# You may obtain a copy of the License at
#
# http://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS-IS" BASIS,
# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
# See the License for the specific language governing permissions and
# limitations under the License.
"""Scans a source JS file for its provided and required namespaces.
Simple class to scan a JavaScript file and express its dependencies.
"""
__author__ = 'nnaze@google.com'
import re
_BASE_REGEX_STRING = r'^\s*goog\.%s\(\s*[\'"](.+)[\'"]\s*\)'
_MODULE_REGEX = re.compile(_BASE_REGEX_STRING % 'module')
_PROVIDE_REGEX = re.compile(_BASE_REGEX_STRING % 'provide')
_REQUIRE_REGEX_STRING = (r'^\s*(?:(?:var|let|const)\s+[a-zA-Z_$][a-zA-Z0-9$_]*'
r'\s*=\s*)?goog\.require\(\s*[\'"](.+)[\'"]\s*\)')
_REQUIRES_REGEX = re.compile(_REQUIRE_REGEX_STRING)
class Source(object):
"""Scans a JavaScript source for its provided and required namespaces."""
# Matches a "/* ... */" comment.
# Note: We can't definitively distinguish a "/*" in a string literal without a
# state machine tokenizer. We'll assume that a line starting with whitespace
# and "/*" is a comment.
_COMMENT_REGEX = re.compile(
r"""
^\s* # Start of a new line and whitespace
/\* # Opening "/*"
.*? # Non greedy match of any characters (including newlines)
\*/ # Closing "*/""",
re.MULTILINE | re.DOTALL | re.VERBOSE)
def __init__(self, source):
"""Initialize a source.
Args:
source: str, The JavaScript source.
"""
self.provides = set()
self.requires = set()
self.is_goog_module = False
self._source = source
self._ScanSource()
def GetSource(self):
"""Get the source as a string."""
return self._source
@classmethod
def _StripComments(cls, source):
return cls._COMMENT_REGEX.sub('', source)
@classmethod
def _HasProvideGoogFlag(cls, source):
"""Determines whether the @provideGoog flag is in a comment."""
for comment_content in cls._COMMENT_REGEX.findall(source):
if '@provideGoog' in comment_content:
return True
return False
def _ScanSource(self):
"""Fill in provides and requires by scanning the source."""
stripped_source = self._StripComments(self.GetSource())
source_lines = stripped_source.splitlines()
for line in source_lines:
match = _PROVIDE_REGEX.match(line)
if match:
self.provides.add(match.group(1))
match = _MODULE_REGEX.match(line)
if match:
self.provides.add(match.group(1))
self.is_goog_module = True
match = _REQUIRES_REGEX.match(line)
if match:
self.requires.add(match.group(1))
# Closure's base file implicitly provides 'goog'.
# This is indicated with the @provideGoog flag.
if self._HasProvideGoogFlag(self.GetSource()):
if len(self.provides) or len(self.requires):
raise Exception(
'Base file should not provide or require namespaces.')
self.provides.add('goog')
def GetFileContents(path):
"""Get a file's contents as a string.
Args:
path: str, Path to file.
Returns:
str, Contents of file.
Raises:
IOError: An error occurred opening or reading the file.
"""
fileobj = open(path)
try:
return fileobj.read()
finally:
fileobj.close()

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#!/usr/bin/env python
#
# Copyright 2010 The Closure Library Authors. All Rights Reserved.
#
# Licensed under the Apache License, Version 2.0 (the "License");
# you may not use this file except in compliance with the License.
# You may obtain a copy of the License at
#
# http://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS-IS" BASIS,
# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
# See the License for the specific language governing permissions and
# limitations under the License.
"""Shared utility functions for scanning directory trees."""
import os
import re
__author__ = 'nnaze@google.com (Nathan Naze)'
# Matches a .js file path.
_JS_FILE_REGEX = re.compile(r'^.+\.js$')
def ScanTreeForJsFiles(root):
"""Scans a directory tree for JavaScript files.
Args:
root: str, Path to a root directory.
Returns:
An iterable of paths to JS files, relative to cwd.
"""
return ScanTree(root, path_filter=_JS_FILE_REGEX)
def ScanTree(root, path_filter=None, ignore_hidden=True):
"""Scans a directory tree for files.
Args:
root: str, Path to a root directory.
path_filter: A regular expression filter. If set, only paths matching
the path_filter are returned.
ignore_hidden: If True, do not follow or return hidden directories or files
(those starting with a '.' character).
Yields:
A string path to files, relative to cwd.
"""
def OnError(os_error):
raise os_error
for dirpath, dirnames, filenames in os.walk(root, onerror=OnError):
# os.walk allows us to modify dirnames to prevent decent into particular
# directories. Avoid hidden directories.
for dirname in dirnames:
if ignore_hidden and dirname.startswith('.'):
dirnames.remove(dirname)
for filename in filenames:
# nothing that starts with '.'
if ignore_hidden and filename.startswith('.'):
continue
fullpath = os.path.join(dirpath, filename)
if path_filter and not path_filter.match(fullpath):
continue
yield os.path.normpath(fullpath)

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#!/usr/bin/env python
#
# Copyright 2006 The Closure Library Authors. All Rights Reserved.
#
# Licensed under the Apache License, Version 2.0 (the "License");
# you may not use this file except in compliance with the License.
# You may obtain a copy of the License at
#
# http://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS-IS" BASIS,
# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
# See the License for the specific language governing permissions and
# limitations under the License.
"""Calculates JavaScript dependencies without requiring Google's build system.
This tool is deprecated and is provided for legacy users.
See build/closurebuilder.py and build/depswriter.py for the current tools.
It iterates over a number of search paths and builds a dependency tree. With
the inputs provided, it walks the dependency tree and outputs all the files
required for compilation.
"""
try:
import distutils.version
except ImportError:
# distutils is not available in all environments
distutils = None
import logging
import optparse
import os
import re
import subprocess
import sys
_BASE_REGEX_STRING = '^\s*goog\.%s\(\s*[\'"](.+)[\'"]\s*\)'
req_regex = re.compile(_BASE_REGEX_STRING % 'require')
prov_regex = re.compile(_BASE_REGEX_STRING % 'provide')
ns_regex = re.compile('^ns:((\w+\.)*(\w+))$')
version_regex = re.compile('[\.0-9]+')
def IsValidFile(ref):
"""Returns true if the provided reference is a file and exists."""
return os.path.isfile(ref)
def IsJsFile(ref):
"""Returns true if the provided reference is a Javascript file."""
return ref.endswith('.js')
def IsNamespace(ref):
"""Returns true if the provided reference is a namespace."""
return re.match(ns_regex, ref) is not None
def IsDirectory(ref):
"""Returns true if the provided reference is a directory."""
return os.path.isdir(ref)
def ExpandDirectories(refs):
"""Expands any directory references into inputs.
Description:
Looks for any directories in the provided references. Found directories
are recursively searched for .js files, which are then added to the result
list.
Args:
refs: a list of references such as files, directories, and namespaces
Returns:
A list of references with directories removed and replaced by any
.js files that are found in them. Also, the paths will be normalized.
"""
result = []
for ref in refs:
if IsDirectory(ref):
# Disable 'Unused variable' for subdirs
# pylint: disable=unused-variable
for (directory, subdirs, filenames) in os.walk(ref):
for filename in filenames:
if IsJsFile(filename):
result.append(os.path.join(directory, filename))
else:
result.append(ref)
return map(os.path.normpath, result)
class DependencyInfo(object):
"""Represents a dependency that is used to build and walk a tree."""
def __init__(self, filename):
self.filename = filename
self.provides = []
self.requires = []
def __str__(self):
return '%s Provides: %s Requires: %s' % (self.filename,
repr(self.provides),
repr(self.requires))
def BuildDependenciesFromFiles(files):
"""Build a list of dependencies from a list of files.
Description:
Takes a list of files, extracts their provides and requires, and builds
out a list of dependency objects.
Args:
files: a list of files to be parsed for goog.provides and goog.requires.
Returns:
A list of dependency objects, one for each file in the files argument.
"""
result = []
filenames = set()
for filename in files:
if filename in filenames:
continue
# Python 3 requires the file encoding to be specified
if (sys.version_info[0] < 3):
file_handle = open(filename, 'r')
else:
file_handle = open(filename, 'r', encoding='utf8')
try:
dep = CreateDependencyInfo(filename, file_handle)
result.append(dep)
finally:
file_handle.close()
filenames.add(filename)
return result
def CreateDependencyInfo(filename, source):
"""Create dependency info.
Args:
filename: Filename for source.
source: File-like object containing source.
Returns:
A DependencyInfo object with provides and requires filled.
"""
dep = DependencyInfo(filename)
for line in source:
if re.match(req_regex, line):
dep.requires.append(re.search(req_regex, line).group(1))
if re.match(prov_regex, line):
dep.provides.append(re.search(prov_regex, line).group(1))
return dep
def BuildDependencyHashFromDependencies(deps):
"""Builds a hash for searching dependencies by the namespaces they provide.
Description:
Dependency objects can provide multiple namespaces. This method enumerates
the provides of each dependency and adds them to a hash that can be used
to easily resolve a given dependency by a namespace it provides.
Args:
deps: a list of dependency objects used to build the hash.
Raises:
Exception: If a multiple files try to provide the same namepace.
Returns:
A hash table { namespace: dependency } that can be used to resolve a
dependency by a namespace it provides.
"""
dep_hash = {}
for dep in deps:
for provide in dep.provides:
if provide in dep_hash:
raise Exception('Duplicate provide (%s) in (%s, %s)' % (
provide,
dep_hash[provide].filename,
dep.filename))
dep_hash[provide] = dep
return dep_hash
def CalculateDependencies(paths, inputs):
"""Calculates the dependencies for given inputs.
Description:
This method takes a list of paths (files, directories) and builds a
searchable data structure based on the namespaces that each .js file
provides. It then parses through each input, resolving dependencies
against this data structure. The final output is a list of files,
including the inputs, that represent all of the code that is needed to
compile the given inputs.
Args:
paths: the references (files, directories) that are used to build the
dependency hash.
inputs: the inputs (files, directories, namespaces) that have dependencies
that need to be calculated.
Raises:
Exception: if a provided input is invalid.
Returns:
A list of all files, including inputs, that are needed to compile the given
inputs.
"""
deps = BuildDependenciesFromFiles(paths + inputs)
search_hash = BuildDependencyHashFromDependencies(deps)
result_list = []
seen_list = []
for input_file in inputs:
if IsNamespace(input_file):
namespace = re.search(ns_regex, input_file).group(1)
if namespace not in search_hash:
raise Exception('Invalid namespace (%s)' % namespace)
input_file = search_hash[namespace].filename
if not IsValidFile(input_file) or not IsJsFile(input_file):
raise Exception('Invalid file (%s)' % input_file)
seen_list.append(input_file)
file_handle = open(input_file, 'r')
try:
for line in file_handle:
if re.match(req_regex, line):
require = re.search(req_regex, line).group(1)
ResolveDependencies(require, search_hash, result_list, seen_list)
finally:
file_handle.close()
result_list.append(input_file)
# All files depend on base.js, so put it first.
base_js_path = FindClosureBasePath(paths)
if base_js_path:
result_list.insert(0, base_js_path)
else:
logging.warning('Closure Library base.js not found.')
return result_list
def FindClosureBasePath(paths):
"""Given a list of file paths, return Closure base.js path, if any.
Args:
paths: A list of paths.
Returns:
The path to Closure's base.js file including filename, if found.
"""
for path in paths:
pathname, filename = os.path.split(path)
if filename == 'base.js':
f = open(path)
is_base = False
# Sanity check that this is the Closure base file. Check that this
# is where goog is defined. This is determined by the @provideGoog
# flag.
for line in f:
if '@provideGoog' in line:
is_base = True
break
f.close()
if is_base:
return path
def ResolveDependencies(require, search_hash, result_list, seen_list):
"""Takes a given requirement and resolves all of the dependencies for it.
Description:
A given requirement may require other dependencies. This method
recursively resolves all dependencies for the given requirement.
Raises:
Exception: when require does not exist in the search_hash.
Args:
require: the namespace to resolve dependencies for.
search_hash: the data structure used for resolving dependencies.
result_list: a list of filenames that have been calculated as dependencies.
This variable is the output for this function.
seen_list: a list of filenames that have been 'seen'. This is required
for the dependency->dependant ordering.
"""
if require not in search_hash:
raise Exception('Missing provider for (%s)' % require)
dep = search_hash[require]
if not dep.filename in seen_list:
seen_list.append(dep.filename)
for sub_require in dep.requires:
ResolveDependencies(sub_require, search_hash, result_list, seen_list)
result_list.append(dep.filename)
def GetDepsLine(dep, base_path):
"""Returns a JS string for a dependency statement in the deps.js file.
Args:
dep: The dependency that we're printing.
base_path: The path to Closure's base.js including filename.
"""
return 'goog.addDependency("%s", %s, %s);' % (
GetRelpath(dep.filename, base_path), dep.provides, dep.requires)
def GetRelpath(path, start):
"""Return a relative path to |path| from |start|."""
# NOTE: Python 2.6 provides os.path.relpath, which has almost the same
# functionality as this function. Since we want to support 2.4, we have
# to implement it manually. :(
path_list = os.path.abspath(os.path.normpath(path)).split(os.sep)
start_list = os.path.abspath(
os.path.normpath(os.path.dirname(start))).split(os.sep)
common_prefix_count = 0
for i in range(0, min(len(path_list), len(start_list))):
if path_list[i] != start_list[i]:
break
common_prefix_count += 1
# Always use forward slashes, because this will get expanded to a url,
# not a file path.
return '/'.join(['..'] * (len(start_list) - common_prefix_count) +
path_list[common_prefix_count:])
def PrintLine(msg, out):
out.write(msg)
out.write('\n')
def PrintDeps(source_paths, deps, out):
"""Print out a deps.js file from a list of source paths.
Args:
source_paths: Paths that we should generate dependency info for.
deps: Paths that provide dependency info. Their dependency info should
not appear in the deps file.
out: The output file.
Returns:
True on success, false if it was unable to find the base path
to generate deps relative to.
"""
base_path = FindClosureBasePath(source_paths + deps)
if not base_path:
return False
PrintLine('// This file was autogenerated by calcdeps.py', out)
excludesSet = set(deps)
for dep in BuildDependenciesFromFiles(source_paths + deps):
if not dep.filename in excludesSet:
PrintLine(GetDepsLine(dep, base_path), out)
return True
def PrintScript(source_paths, out):
for index, dep in enumerate(source_paths):
PrintLine('// Input %d' % index, out)
f = open(dep, 'r')
PrintLine(f.read(), out)
f.close()
def GetJavaVersion():
"""Returns the string for the current version of Java installed."""
proc = subprocess.Popen(['java', '-version'], stderr=subprocess.PIPE)
proc.wait()
version_line = proc.stderr.read().splitlines()[0]
return version_regex.search(version_line).group()
def FilterByExcludes(options, files):
"""Filters the given files by the exlusions specified at the command line.
Args:
options: The flags to calcdeps.
files: The files to filter.
Returns:
A list of files.
"""
excludes = []
if options.excludes:
excludes = ExpandDirectories(options.excludes)
excludesSet = set(excludes)
return [i for i in files if not i in excludesSet]
def GetPathsFromOptions(options):
"""Generates the path files from flag options.
Args:
options: The flags to calcdeps.
Returns:
A list of files in the specified paths. (strings).
"""
search_paths = options.paths
if not search_paths:
search_paths = ['.'] # Add default folder if no path is specified.
search_paths = ExpandDirectories(search_paths)
return FilterByExcludes(options, search_paths)
def GetInputsFromOptions(options):
"""Generates the inputs from flag options.
Args:
options: The flags to calcdeps.
Returns:
A list of inputs (strings).
"""
inputs = options.inputs
if not inputs: # Parse stdin
logging.info('No inputs specified. Reading from stdin...')
inputs = filter(None, [line.strip('\n') for line in sys.stdin.readlines()])
logging.info('Scanning files...')
inputs = ExpandDirectories(inputs)
return FilterByExcludes(options, inputs)
def Compile(compiler_jar_path, source_paths, out, flags=None):
"""Prepares command-line call to Closure compiler.
Args:
compiler_jar_path: Path to the Closure compiler .jar file.
source_paths: Source paths to build, in order.
flags: A list of additional flags to pass on to Closure compiler.
"""
args = ['java', '-jar', compiler_jar_path]
for path in source_paths:
args += ['--js', path]
if flags:
args += flags
logging.info('Compiling with the following command: %s', ' '.join(args))
proc = subprocess.Popen(args, stdout=subprocess.PIPE)
(stdoutdata, stderrdata) = proc.communicate()
if proc.returncode != 0:
logging.error('JavaScript compilation failed.')
sys.exit(1)
else:
out.write(stdoutdata)
def main():
"""The entrypoint for this script."""
logging.basicConfig(format='calcdeps.py: %(message)s', level=logging.INFO)
usage = 'usage: %prog [options] arg'
parser = optparse.OptionParser(usage)
parser.add_option('-i',
'--input',
dest='inputs',
action='append',
help='The inputs to calculate dependencies for. Valid '
'values can be files, directories, or namespaces '
'(ns:goog.net.XhrIo). Only relevant to "list" and '
'"script" output.')
parser.add_option('-p',
'--path',
dest='paths',
action='append',
help='The paths that should be traversed to build the '
'dependencies.')
parser.add_option('-d',
'--dep',
dest='deps',
action='append',
help='Directories or files that should be traversed to '
'find required dependencies for the deps file. '
'Does not generate dependency information for names '
'provided by these files. Only useful in "deps" mode.')
parser.add_option('-e',
'--exclude',
dest='excludes',
action='append',
help='Files or directories to exclude from the --path '
'and --input flags')
parser.add_option('-o',
'--output_mode',
dest='output_mode',
action='store',
default='list',
help='The type of output to generate from this script. '
'Options are "list" for a list of filenames, "script" '
'for a single script containing the contents of all the '
'file, "deps" to generate a deps.js file for all '
'paths, or "compiled" to produce compiled output with '
'the Closure compiler.')
parser.add_option('-c',
'--compiler_jar',
dest='compiler_jar',
action='store',
help='The location of the Closure compiler .jar file.')
parser.add_option('-f',
'--compiler_flag',
'--compiler_flags', # for backwards compatability
dest='compiler_flags',
action='append',
help='Additional flag to pass to the Closure compiler. '
'May be specified multiple times to pass multiple flags.')
parser.add_option('--output_file',
dest='output_file',
action='store',
help=('If specified, write output to this path instead of '
'writing to standard output.'))
(options, args) = parser.parse_args()
search_paths = GetPathsFromOptions(options)
if options.output_file:
out = open(options.output_file, 'w')
else:
out = sys.stdout
if options.output_mode == 'deps':
result = PrintDeps(search_paths, ExpandDirectories(options.deps or []), out)
if not result:
logging.error('Could not find Closure Library in the specified paths')
sys.exit(1)
return
inputs = GetInputsFromOptions(options)
logging.info('Finding Closure dependencies...')
deps = CalculateDependencies(search_paths, inputs)
output_mode = options.output_mode
if output_mode == 'script':
PrintScript(deps, out)
elif output_mode == 'list':
# Just print out a dep per line
for dep in deps:
PrintLine(dep, out)
elif output_mode == 'compiled':
# Make sure a .jar is specified.
if not options.compiler_jar:
logging.error('--compiler_jar flag must be specified if --output is '
'"compiled"')
sys.exit(1)
# User friendly version check.
if distutils and not (distutils.version.LooseVersion(GetJavaVersion()) >
distutils.version.LooseVersion('1.6')):
logging.error('Closure Compiler requires Java 1.6 or higher.')
logging.error('Please visit http://www.java.com/getjava')
sys.exit(1)
Compile(options.compiler_jar, deps, out, options.compiler_flags)
else:
logging.error('Invalid value for --output flag.')
sys.exit(1)
if __name__ == '__main__':
main()

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#!/usr/bin/python
#
# Copyright 2010 The Closure Library Authors. All Rights Reserved.
#
# Licensed under the Apache License, Version 2.0 (the "License");
# you may not use this file except in compliance with the License.
# You may obtain a copy of the License at
#
# http://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS-IS" BASIS,
# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
# See the License for the specific language governing permissions and
# limitations under the License.
"""Automatically converts codebases over to goog.scope.
Usage:
cd path/to/my/dir;
../../../../javascript/closure/bin/scopify.py
Scans every file in this directory, recursively. Looks for existing
goog.scope calls, and goog.require'd symbols. If it makes sense to
generate a goog.scope call for the file, then we will do so, and
try to auto-generate some aliases based on the goog.require'd symbols.
Known Issues:
When a file is goog.scope'd, the file contents will be indented +2.
This may put some lines over 80 chars. These will need to be fixed manually.
We will only try to create aliases for capitalized names. We do not check
to see if those names will conflict with any existing locals.
This creates merge conflicts for every line of every outstanding change.
If you intend to run this on your codebase, make sure your team members
know. Better yet, send them this script so that they can scopify their
outstanding changes and "accept theirs".
When an alias is "captured", it can no longer be stubbed out for testing.
Run your tests.
"""
__author__ = 'nicksantos@google.com (Nick Santos)'
import os.path
import re
import sys
REQUIRES_RE = re.compile(r"goog.require\('([^']*)'\)")
# Edit this manually if you want something to "always" be aliased.
# TODO(nicksantos): Add a flag for this.
DEFAULT_ALIASES = {}
def Transform(lines):
"""Converts the contents of a file into javascript that uses goog.scope.
Arguments:
lines: A list of strings, corresponding to each line of the file.
Returns:
A new list of strings, or None if the file was not modified.
"""
requires = []
# Do an initial scan to be sure that this file can be processed.
for line in lines:
# Skip this file if it has already been scopified.
if line.find('goog.scope') != -1:
return None
# If there are any global vars or functions, then we also have
# to skip the whole file. We might be able to deal with this
# more elegantly.
if line.find('var ') == 0 or line.find('function ') == 0:
return None
for match in REQUIRES_RE.finditer(line):
requires.append(match.group(1))
if len(requires) == 0:
return None
# Backwards-sort the requires, so that when one is a substring of another,
# we match the longer one first.
for val in DEFAULT_ALIASES.values():
if requires.count(val) == 0:
requires.append(val)
requires.sort()
requires.reverse()
# Generate a map of requires to their aliases
aliases_to_globals = DEFAULT_ALIASES.copy()
for req in requires:
index = req.rfind('.')
if index == -1:
alias = req
else:
alias = req[(index + 1):]
# Don't scopify lowercase namespaces, because they may conflict with
# local variables.
if alias[0].isupper():
aliases_to_globals[alias] = req
aliases_to_matchers = {}
globals_to_aliases = {}
for alias, symbol in aliases_to_globals.items():
globals_to_aliases[symbol] = alias
aliases_to_matchers[alias] = re.compile('\\b%s\\b' % symbol)
# Insert a goog.scope that aliases all required symbols.
result = []
START = 0
SEEN_REQUIRES = 1
IN_SCOPE = 2
mode = START
aliases_used = set()
insertion_index = None
num_blank_lines = 0
for line in lines:
if mode == START:
result.append(line)
if re.search(REQUIRES_RE, line):
mode = SEEN_REQUIRES
elif mode == SEEN_REQUIRES:
if (line and
not re.search(REQUIRES_RE, line) and
not line.isspace()):
# There should be two blank lines before goog.scope
result += ['\n'] * 2
result.append('goog.scope(function() {\n')
insertion_index = len(result)
result += ['\n'] * num_blank_lines
mode = IN_SCOPE
elif line.isspace():
# Keep track of the number of blank lines before each block of code so
# that we can move them after the goog.scope line if necessary.
num_blank_lines += 1
else:
# Print the blank lines we saw before this code block
result += ['\n'] * num_blank_lines
num_blank_lines = 0
result.append(line)
if mode == IN_SCOPE:
for symbol in requires:
if not symbol in globals_to_aliases:
continue
alias = globals_to_aliases[symbol]
matcher = aliases_to_matchers[alias]
for match in matcher.finditer(line):
# Check to make sure we're not in a string.
# We do this by being as conservative as possible:
# if there are any quote or double quote characters
# before the symbol on this line, then bail out.
before_symbol = line[:match.start(0)]
if before_symbol.count('"') > 0 or before_symbol.count("'") > 0:
continue
line = line.replace(match.group(0), alias)
aliases_used.add(alias)
if line.isspace():
# Truncate all-whitespace lines
result.append('\n')
else:
result.append(line)
if len(aliases_used):
aliases_used = [alias for alias in aliases_used]
aliases_used.sort()
aliases_used.reverse()
for alias in aliases_used:
symbol = aliases_to_globals[alias]
result.insert(insertion_index,
'var %s = %s;\n' % (alias, symbol))
result.append('}); // goog.scope\n')
return result
else:
return None
def TransformFileAt(path):
"""Converts a file into javascript that uses goog.scope.
Arguments:
path: A path to a file.
"""
f = open(path)
lines = Transform(f.readlines())
if lines:
f = open(path, 'w')
for l in lines:
f.write(l)
f.close()
if __name__ == '__main__':
args = sys.argv[1:]
if not len(args):
args = '.'
for file_name in args:
if os.path.isdir(file_name):
for root, dirs, files in os.walk(file_name):
for name in files:
if name.endswith('.js') and \
not os.path.islink(os.path.join(root, name)):
TransformFileAt(os.path.join(root, name))
else:
if file_name.endswith('.js') and \
not os.path.islink(file_name):
TransformFileAt(file_name)

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