make configurations like frog-none do the right thing: call frog, but don't

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 128 matching lines @@
 
 def compileAndRun(options, args, dart):
   nodeArgs = []
   for i in range(len(args)):
     if args[i].endswith('.dart'):
       nodeArgs = args[i+1:]
       args = args[:i+1]
       break
 
   outfile_given = False
+  execute_output = True
   for i in range(len(args)):
     if args[i].startswith('--out'):
       outfile_given = True
       outfile = args[i][6:]
+      execute_output = False
+      break;
+    if args[i] == '--compile-only':
+      execute_output = False
       break;
 
   if options.verbose: print "nodeArgs %s" % ' '.join(nodeArgs);
 
   workdir = options.workdir
   cleanup = False
   if not workdir:
     if not options.html:
       workdir = tempfile.mkdtemp()
       if not options.keep_files:
@@ skipping 30 matching lines @@
   if exit_code:
     if options.verbose: print ("cmd exited with status %d" % exit_code)
     if cleanup: shutil.rmtree(workdir)
     if exit_code < 0:
       print("VM exited with signal %d" % (-exit_code))
       # TODO(ahe): Using 253 to signal a crash to test.dart.
       return 253
     return exit_code
 
   result = 0
-  if not outfile_given:
+  if execute_output:
     if not options.html:
       if ensureJsEngine(options) != 0:
         return 1
       js_cmd = options.js_cmd
       result = execute(js_cmd.split(' ') + [outfile] + nodeArgs)
     else:
       f = open(outhtml, 'w')
       f.write(HTML)
       f.close()
       result = execute([browser, outhtml])
+  elif outfile_given:
+    print 'Compilation succeded. Code generated in: %s' % outfile
   else:
-    print 'Compilation succeded. Code generated in: %s' % outfile
+    print 'Compilation succeded.'
 
   if cleanup: shutil.rmtree(workdir)
   if result != 0:
     return 1
   return 0
 
 if __name__ == '__main__':
   sys.exit(main(sys.argv))