isolates in frog: playing with API improvements

frog/frog.py

 #!/usr/bin/env python
 # Copyright (c) 2011, the Dart project authors.  Please see the AUTHORS file
 # for details. All rights reserved. Use of this source code is governed by a
 # BSD-style license that can be found in the LICENSE file.
 
 """Command line wrapper to run the frog compiler under the Dart VM"""
 
 # TODO(jimhug): This is a temporary hack to enable running on the VM.  We need
 #   the ability to get command-line arguments, to return exit codes, and to
 #   communicate with spawned processes in the VM for this to go away.
@@ skipping 24 matching lines @@
 
 def GetDart():
   # Get the release version.
   return utils.GetDartRunner('release', 'ia32', 'vm')
 
 def GetD8():
   return join(dirname(GetDart()), 'd8')
 
 D8 = GetD8()
 
+# The following environment variable is needed for isolate tests to work.
+# TODO(sigmund): delete this and the 'env' parameter in 'execute' when we remove
+# dependencies to nodejs
+os.environ['NODE_MODULE_CONTEXTS'] = '1'
+
 def execute(cmd):
   """Execute a command in a subprocess. """
   try:
-    proc = subprocess.Popen(cmd, stdout=sys.stdout, stderr=sys.stderr)
+    proc = subprocess.Popen(cmd, stdout=sys.stdout, stderr=sys.stderr,
+        env=os.environ)
     return proc.wait()
   except Exception as e:
     print 'Exception when executing: ' + ' '.join(cmd)
     print e
     return 1
 
 def parseOptions(args):
   optionParser = optparse.OptionParser()
 
   optionParser.add_option('--work', dest='workdir',
@@ skipping 146 matching lines @@
   else:
     print 'Compilation succeded. Code generated in: %s' % outfile
 
   if cleanup: shutil.rmtree(workdir)
   if result != 0:
     return 1
   return 0
 
 if __name__ == '__main__':
   sys.exit(main(sys.argv))