Create js_library and js_binary templates for closure compiling.

third_party/closure_compiler/js_library.py

+# Copyright 2017 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.
+"""Generates a file describing the js_library to be used by js_binary action.
+
+This script takes in a list of sources and dependencies as described by a
+js_library action.  It creates a file listing the sources and dependencies
+that can later be used by a js_binary action to compile the javascript.
+"""
+
+from argparse import ArgumentParser
+
+
+def main():
+  parser = ArgumentParser()
+  parser.add_argument('-s', '--sources', nargs='*', default=[],
+                      help='List of js source files')
+  parser.add_argument('-o', '--output', help='Write list to output')
+  parser.add_argument('-d', '--deps', nargs='*', default=[],
+                      help='List of js_library dependencies')
+  args = parser.parse_args()
+
+  with open(args.output, 'w') as out:
+    out.write('sources:\n%s\ndeps:\n%s' % ('\n'.join(args.sources),
+                                           '\n'.join(args.deps)))
+
+
+if __name__ == '__main__':
+  main()