Make GAE instance bind all interfaces when a variable is set.

tests/local_rietveld.py

 #!/usr/bin/env python
 # Copyright (c) 2011 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.
 
 """Setups a local Rietveld instance to test against a live server for
 integration tests.
 
 It makes sure Google AppEngine SDK is found, download Rietveld and Django code
 if necessary and starts the server on a free inbound TCP port.
@@ skipping 78 matching lines @@
     else:
       pipe = subprocess2.VOID
     cmd = [
         sys.executable,
         self.dev_app,
         '--skip_sdk_update_check',
         '.',
         '--port=%d' % self.port,
         '--datastore_path=' + os.path.join(self.rietveld, 'tmp.db'),
         '-c']
+
+    # CHEAP TRICK
+    # By default you only want to bind on loopback but I'm testing over a
+    # headless computer so it's useful to be able to access the test instance
+    # remotely.
+    if os.environ.get('GAE_LISTEN_ALL', '') == 'true':
+      cmd.extend(('-a', '0.0.0.0'))
+
     self.test_server = subprocess2.Popen(
         cmd, stdout=pipe, stderr=pipe, cwd=self.rietveld)
     # Loop until port 127.0.0.1:port opens or the process dies.
     while not test_port(self.port):
       self.test_server.poll()
       if self.test_server.returncode is not None:
         raise Failure(
             'Test rietveld instance failed early on port %s' %
             self.port)
       time.sleep(0.01)
@@ skipping 17 matching lines @@
     instance.start_server(verbose=options.verbose)
     print 'Local rietveld instance started on port %d' % instance.port
     while True:
       time.sleep(0.1)
   finally:
     instance.stop_server()
 
 
 if __name__ == '__main__':
   main()