Add support for wrapping the standalone JavaScript.

create_wrapped_standalone_js.py

+# Copyright 2015 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.
+
+"""Wraps the standalone JavaScript inside a templated outer JavaScript.
+
+Chrome needs to wrap the standalone JavaScript so it does not access the real
+window object, which is done in the wrapper JS. The output of this script is
+the file which is included in the Chrome builds.
+"""
+
+import optparse
+import sys
+
+def main(argv):
+  parser = optparse.OptionParser()
+  parser.add_option('-t', '--templatefile',
+      help='The path to the output JavaScript template.')
+  parser.add_option('-i', '--infile',
+      help='The path to the standalone JavaScript to inject into the template.')
+  parser.add_option('-o', '--outfile',
+      help='The path to the output JavaScript.')
+  options, _ = parser.parse_args(argv)
+
+  templatepath = options.templatefile
+  inpath = options.infile
+  outpath = options.outfile
+
+  if templatepath:
+    templatefile = open(templatepath, 'r')
+  else:
+    print 'Please provide path to the template file'
+    return 1
+
+  if inpath:
+    infile = open(inpath, 'r')
+  else:
+    print 'Reading input from stdin'
+    infile = sys.stdin
+
+  if outpath:
+    outfile = open(outpath, 'w')
+  else:
+    outfile = sys.stdout
+
+  standalone_js = infile.read()
+  template_js = templatefile.read()
+  output_js = template_js.replace('$$DISTILLER_JAVASCRIPT', standalone_js)
+  outfile.write(output_js)
+  return 0
+
+if __name__ == '__main__':
+  sys.exit(main(sys.argv))