Update mig.py to take an explicit sdk argument.

third_party/crashpad/crashpad/util/mach/mig.py

 #!/usr/bin/env python
 # coding: utf-8
 
 # Copyright 2014 The Crashpad Authors. All rights reserved.
 #
 # Licensed under the Apache License, Version 2.0 (the "License");
 # you may not use this file except in compliance with the License.
 # You may obtain a copy of the License at
 #
 #     http://www.apache.org/licenses/LICENSE-2.0
 #
 # Unless required by applicable law or agreed to in writing, software
 # distributed under the License is distributed on an "AS IS" BASIS,
 # WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 # See the License for the specific language governing permissions and
 # limitations under the License.
 
+import argparse
 import os
 import re
 import subprocess
 import sys
 
 def FixUserImplementation(implementation):
   """Rewrites a MIG-generated user implementation (.c) file.
 
   Rewrites the file at |implementation| by adding “__attribute__((unused))” to
   the definition of any structure typedefed as “__Reply” by searching for the
@@ skipping 72 matching lines @@
 #ifdef __cplusplus
 }
 #endif
 ''' % (contents, declarations_text)
   file.seek(0)
   file.truncate()
   file.write(contents)
   file.close()
 
 def main(args):
-  if len(args) == 5:
-    (defs_file, user_c, server_c, user_h, server_h) = args
-  elif len(args) == 6:
-    (defs_file, user_c, server_c, user_h, server_h, dev_dir) = args
-    os.environ['DEVELOPER_DIR'] = dev_dir
-  else:
-    assert False, "Wrong number of arguments"
-  subprocess.check_call(['mig',
-                         '-user', user_c,
-                         '-server', server_c,
-                         '-header', user_h,
-                         '-sheader', server_h,
-                         defs_file])
-  FixUserImplementation(user_c)
-  server_declarations = FixServerImplementation(server_c)
-  FixHeader(user_h)
-  FixHeader(server_h, server_declarations)
+  parser = argparse.ArgumentParser()
+  parser.add_argument('--developer-dir', help='Path to Xcode')
+  parser.add_argument('--sdk', help='Path to SDK')
+  parser.add_argument('defs')
+  parser.add_argument('user_c')
+  parser.add_argument('server_c')
+  parser.add_argument('user_h')
+  parser.add_argument('server_h')
+  parsed = parser.parse_args(args)
+
+  command = ['mig',
+             '-user', parsed.user_c,
+             '-server', parsed.server_c,
+             '-header', parsed.user_h,
+             '-sheader', parsed.server_h,
+            ]
+  if parsed.sdk is not None:
+    command.extend(['-isysroot', parsed.sdk])
+  if parsed.developer_dir is not None:
+    os.environ['DEVELOPER_DIR'] = parsed.developer_dir
+  command.append(parsed.defs)
+  subprocess.check_call(command)
+  FixUserImplementation(parsed.user_c)
+  server_declarations = FixServerImplementation(parsed.server_c)
+  FixHeader(parsed.user_h)
+  FixHeader(parsed.server_h, server_declarations)
 
 if __name__ == '__main__':
   sys.exit(main(sys.argv[1:]))