Generate and use LASTCHANGE for blink

tools/export_tarball/export_tarball.py

Index: tools/export_tarball/export_tarball.py
diff --git a/tools/export_tarball/export_tarball.py b/tools/export_tarball/export_tarball.py
index 148162b482d58ad7d71b41bc1a7e123102d3e46e..ec0785c4c4dfe17e44a807561bd8f7ff58886d4c 100755
--- a/tools/export_tarball/export_tarball.py
+++ b/tools/export_tarball/export_tarball.py
@@ -134,11 +134,17 @@ def main(argv):
     print 'Cannot find the src directory ' + GetSourceDirectory()
     return 1
 
-  # This command is from src/DEPS; please keep them in sync.
+  # These two commands are from src/DEPS; please keep them in sync.
   if subprocess.call(['python', 'build/util/lastchange.py', '-o',
                       'build/util/LASTCHANGE'], cwd=GetSourceDirectory()) != 0:
     print 'Could not run build/util/lastchange.py to update LASTCHANGE.'
     return 1
+  if subprocess.call(['python', 'build/util/lastchange.py', '-s',
+                      'src/third_party/WebKit', '-o',

[Paweł Hajdan Jr., 2013/06/14 20:44:00]

Note: this broke the script (could be easily detected by running it:

$ tools/export_tarball/export_tarball.py foo
Traceback (most recent call last):
  File "build/util/lastchange.py", line 236, in <module>
    sys.exit(main())
  File "build/util/lastchange.py", line 228, in main
    WriteIfChanged(out_file, contents)
  File "build/util/lastchange.py", line 185, in WriteIfChanged
    open(file_name, 'w').write(contents)
IOError: [Errno 2] No such file or directory: 'src/build/util/LASTCHANGE.blink'
Could not run build/util/lastchange.py to update LASTCHANGE.blink.

I have a CL to fix it, https://codereview.chromium.org/17105005 . This is just
feedback to avoid similar mistakes in the future. Thanks!

+                      'src/build/util/LASTCHANGE.blink'],
+                     cwd=GetSourceDirectory()) != 0:
+    print 'Could not run build/util/lastchange.py to update LASTCHANGE.blink.'
+    return 1
 
   output_fullname = args[0] + '.tar'
   output_basename = options.basename or os.path.basename(args[0])