create build_frogpad_js.py to help repro bug 1700

frog/scripts/bootstrap/build_frogpad_js.py

+# Copyright 2011 Google Inc. All Rights Reserved.

[ahe, 2012/03/07 13:07:54]

Why is this file in scripts/bootstrap? How is this file contributing to
bootstrapping frog?

Also, why can you not use '<(PRODUCT_DIR)/frog/bin/frog'.

+
+import os
+import platform
+import shutil
+import stat
+import sys
+
+HOME = os.path.dirname(os.path.realpath(__file__))
+HOME = os.path.join(HOME, os.pardir, os.pardir)
+
+sys.path.append(HOME)
+import frog
+
+# Runs frog.dart on the dart vm to compile frogpad.dart to frogpad.js
+def main(args):
+  if len(args) >= 2:
+    product_dir = args[1]
+  else:
+    product_dir = os.path.abspath(os.path.join(os.path.dirname(__file__),
+        '..', '..', '..', 'out/Release_ia32'))

[ngeoffray, 2012/03/07 12:53:44]

out/Release_ia32 is linux only. I think this script should require a product_dir
instead.

+    print product_dir
+
+  vm = os.path.join(product_dir, 'dart')
+  frogpad_dart = os.path.join(product_dir, '..', '..',
+      'tools', 'testing',  'frogpad', 'frogpad.dart')
+  frogpad_js = os.path.join(product_dir, 'frog', 'bin', 'frogpad.js')
+
+  if not os.path.exists(vm):
+    raise Exception("cannot find dart vm '%s'" % vm)
+
+  args = ['frog.py',
+          '--verbose',
+          '--vm=' + vm,
+          '--',
+          '--out=' + frogpad_js,
+          frogpad_dart]
+
+  exit_code = frog.main(args)
+  if exit_code:
+    return exit_code
+
+  if not os.path.exists(frogpad_js):
+    raise Exception("didn't generate '%s'" % frogpad_js)
+
+  return 0
+
+
+if __name__ == '__main__':
+  sys.exit(main(sys.argv))