Add input content checking to some build scripts

build/android/gyp/dex.py

Index: build/android/gyp/dex.py
diff --git a/build/android/dex.py b/build/android/gyp/dex.py
similarity index 71%
rename from build/android/dex.py
rename to build/android/gyp/dex.py
index 00c2c527422bc96788ad7f2e8d0f8f1910fb46e8..69d3d96ac29d0b00e58c905cf276104edf9cab4d 100755
--- a/build/android/dex.py
+++ b/build/android/gyp/dex.py
@@ -9,13 +9,26 @@ import optparse
 import os
 import sys
 
+from util import md5_check
+
+BUILD_ANDROID_DIR = os.path.join(os.path.dirname(__file__), '..')
+sys.path.append(BUILD_ANDROID_DIR)
+
 from pylib import build_utils

[Yaron, 2013/04/03 22:05:35]

Is build_utils moving to the gyp dir in another patch?

[cjhopman, 2013/04/03 22:17:56]

Yes.

 
 
 def DoDex(options, paths):
   dx_binary = os.path.join(options.android_sdk_root, 'platform-tools', 'dx')
   dex_cmd = [dx_binary, '--dex', '--output', options.dex_path] + paths
-  build_utils.CheckCallDie(dex_cmd)
+
+  md5_stamp = '%s.md5' % options.dex_path
+  md5_checker = md5_check.Md5Checker(
+      stamp=md5_stamp, inputs=paths, command=dex_cmd)
+  if md5_checker.IsStale():
+    build_utils.CheckCallDie(dex_cmd)
+  else:
+    build_utils.Touch(options.dex_path)
+  md5_checker.Write()
 
 
 def main(argv):