More changes to support hermetic Xcode toolchain in GN.

third_party/WebKit/Source/build/scripts/gperf.py

Index: third_party/WebKit/Source/build/scripts/gperf.py
diff --git a/third_party/WebKit/Source/build/scripts/gperf.py b/third_party/WebKit/Source/build/scripts/gperf.py
index 040cec67d3bb8b8d65a29f7693d8f04f28bba107..a75474c9175907e65a8b93c59f0ea84fd94213b5 100644
--- a/third_party/WebKit/Source/build/scripts/gperf.py
+++ b/third_party/WebKit/Source/build/scripts/gperf.py
@@ -2,11 +2,23 @@
 # Use of this source code is governed by a BSD-style license that can be
 # found in the LICENSE file.
 
-# Invokes gperf for the GN build. The first argument is the path to gperf.
+# Invokes gperf for the GN build.
+# Usage: gperf.py [--developer_dir PATH_TO_XCODE] gperf ...
 # TODO(brettw) this can be removed once the run_executable rules have been
 # checked in for the GN build.
 
+import os
 import subprocess
 import sys
 
-subprocess.check_call(sys.argv[1:])
+
+def main():
+    argument_start = 1
+    if sys.argv[1] == "--developer_dir":

[Nico, 2016/10/08 19:03:37]

i'd use argparse. it's maybe two lines more code and much nicer.

[erikchen, 2016/10/10 19:20:57]

Done.

+        os.environ['DEVELOPER_DIR'] = sys.argv[2]
+        argument_start = 3
+
+    subprocess.check_call(sys.argv[argument_start:])
+
+if __name__ == '__main__':
+    main()