Use optparse in js2c.py for python compatibility

tools/js2c.py

 #!/usr/bin/env python
 #
 # Copyright 2012 the V8 project authors. All rights reserved.
 # Redistribution and use in source and binary forms, with or without
 # modification, are permitted provided that the following conditions are
 # met:
 #
 #     * Redistributions of source code must retain the above copyright
 #       notice, this list of conditions and the following disclaimer.
 #     * Redistributions in binary form must reproduce the above
@@ skipping 14 matching lines @@
 # DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
 # THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
 # (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
 # OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 
 # This is a utility for converting JavaScript source code into C-style
 # char arrays. It is used for embedded JavaScript code in the V8
 # library.
 
 import os, re, sys, string
-import argparse
+import optparse
 import jsmin
 import bz2
 import textwrap
 
 
 class Error(Exception):
   def __init__(self, msg):
     Exception.__init__(self, msg)
 
 
@@ skipping 523 matching lines @@
   # Emit resulting source file.
   output = open(target, "w")
   if emit_js:
     output.write(sources_output)
   else:
     output.write(HEADER_TEMPLATE % metadata)
   output.close()
 
 
 def main():
-  parser = argparse.ArgumentParser()
-  parser.add_argument("out.cc",
-                      help="output filename")
-  parser.add_argument("type",
-                      help="type parameter for NativesCollection template " +
-                           "(see NativeType enum)")
-  parser.add_argument("sources.js",
-                      help="JS internal sources or macros.py.",
-                      nargs="*")
-  parser.add_argument("--raw",
-                      help="file to write the processed sources array to.")
-  parser.add_argument("--startup_blob",
-                      help="file to write the startup blob to.")
-  parser.add_argument("--js",
-                      help="writes a JS file output instead of a C file",
-                      action="store_true")
-
-  args = vars(parser.parse_args())
-  JS2C(args["sources.js"], args["out.cc"], args["type"], args["raw"], args["startup_blob"], args["js"])
+  parser = optparse.OptionParser()
+  parser.add_option("--raw",
+                    help="file to write the processed sources array to.")
+  parser.add_option("--startup_blob",
+                    help="file to write the startup blob to.")
+  parser.add_option("--js",
+                    help="writes a JS file output instead of a C file",
+                    action="store_true")
+  parser.set_usage("""js2c out.cc type sources.js ...
+        out.cc: C code to be generated.
+        type: type parameter for NativesCollection template.
+        sources.js: JS internal sources or macros.py.""")
+  (options, args) = parser.parse_args()
+  JS2C(args[2:],
+       args[0],
+       args[1],
+       options.raw,
+       options.startup_blob,
+       options.js)
 
 
 if __name__ == "__main__":
   main()