Add support for empty files, __init__.py is a common example.

Use p.is_new signal and set it manually with rietveld patches.
Add regression test for +x.

R=dpranke@chromium.org
BUG=
TEST=

Review URL: http://codereview.chromium.org/7054057

git-svn-id: svn://svn.chromium.org/chrome/trunk/tools/depot_tools@87858 0039d316-1c4b-4281-b951-d872f2087c98

apply_issue.py

@@ -22,7 +22,8 @@ import scm
 def main():
   parser = optparse.OptionParser(description=sys.modules[__name__].__doc__)
   parser.add_option(
-      '-v', '--verbose', action='count', help='Prints debugging infos')
+      '-v', '--verbose', action='count', default=0,
+      help='Prints debugging infos')
   parser.add_option(
       '-i', '--issue', type='int', help='Rietveld issue number')
   parser.add_option(
@@ -38,13 +39,10 @@ def main():
       default='http://codereview.chromium.org',
       help='Rietveld server')
   options, args = parser.parse_args()
-  LOG_FORMAT = '%(levelname)s %(filename)s(%(lineno)d): %(message)s'
-  if not options.verbose:
-    logging.basicConfig(level=logging.WARNING, format=LOG_FORMAT)
-  elif options.verbose == 1:
-    logging.basicConfig(level=logging.INFO, format=LOG_FORMAT)
-  elif options.verbose > 1:
-    logging.basicConfig(level=logging.DEBUG, format=LOG_FORMAT)
+  logging.basicConfig(
+      format='%(levelname)s %(filename)s(%(lineno)d): %(message)s',
+      level=[logging.WARNING, logging.INFO, logging.DEBUG][
+          min(2, options.verbose)])
   if args:
     parser.error('Extra argument(s) "%s" not understood' % ' '.join(args))
   if not options.issue:

checkout.py

@@ -127,10 +127,14 @@ class RawCheckout(CheckoutBase):
             with open(os.path.join(filename), 'wb') as f:
               f.write(p.get())
           else:
+            if p.diff_hunks:
               stdout = subprocess2.check_output(
                   ['patch', '-p%s' % p.patchlevel],
                   stdin=p.get(),
                   cwd=self.project_path)
+            elif p.is_new:
+              # There is only a header. Just create the file.
+              open(os.path.join(self.project_path, p.filename), 'w').close()
         for post in post_processor:
           post(self, p)
       except OSError, e:
@@ -258,8 +262,6 @@ class SvnCheckout(CheckoutBase, SvnMixIn):
           stdout += self._check_output_svn(
               ['delete', p.filename, '--force'], credentials=False)
         else:
-          new = not os.path.exists(p.filename)
-
           # svn add while creating directories otherwise svn add on the
           # contained files will silently fail.
           # First, find the root directory that exists.
@@ -278,10 +280,14 @@ class SvnCheckout(CheckoutBase, SvnMixIn):
             with open(os.path.join(self.project_path, p.filename), 'wb') as f:
               f.write(p.get())
           else:
+            if p.diff_hunks:
               cmd = ['patch', '-p%s' % p.patchlevel, '--forward', '--force']
               stdout += subprocess2.check_output(
                   cmd, stdin=p.get(), cwd=self.project_path)
-          if new:
+            elif p.is_new:
+              # There is only a header. Just create the file.
+              open(os.path.join(self.project_path, p.filename), 'w').close()
+          if p.is_new:
             stdout += self._check_output_svn(
                 ['add', p.filename, '--force'], credentials=False)
           for prop in p.svn_properties:
@@ -410,6 +416,8 @@ class GitCheckoutBase(CheckoutBase):
               f.write(p.get())
             stdout += self._check_output_git(['add', p.filename])
           else:
+            # No need to do anything special with p.is_new or if not
+            # p.diff_hunks. git apply manages all that already.
             stdout += self._check_output_git(
                 ['apply', '--index', '-p%s' % p.patchlevel], stdin=p.get())
           for prop in p.svn_properties:

rietveld.py

@@ -142,12 +142,17 @@ class Rietveld(object):
               props,
               is_new=(status[0] == 'A')))
         else:
-          if state['num_chunks']:
+          # Ignores num_chunks since it may only contain an header.
+          try:
             diff = self.get_file_diff(issue, patchset, state['id'])
-          else:
+          except urllib2.HTTPError, e:
+            if e.code == 404:
               raise patch.UnsupportedPatchFormat(
                   filename, 'File doesn\'t have a diff.')
           out.append(patch.FilePatchDiff(filename, diff, props))
+          if status[0] == 'A':
+            # It won't be set for empty file.
+            out[-1].is_new = True
       else:
         # Line too long (N/80)
         # pylint: disable=C0301

tests/patch_test.py

@@ -512,6 +512,15 @@ class PatchTest(unittest.TestCase):
     self.assertEquals(
         [('svn:executable', '*')],
         patch.FilePatchDiff('natsort_test.py', diff, []).svn_properties)
+    diff = (
+        'diff --git a/natsort_test.py b/natsort_test.py\n'
+        'new file mode 100644\n'
+        '--- /dev/null\n'
+        '+++ b/natsort_test.py\n'
+        '@@ -0,0 +1,1 @@\n'
+        '+#!/usr/bin/env python\n')
+    self.assertEquals(
+        [], patch.FilePatchDiff('natsort_test.py', diff, []).svn_properties)
 
 
 if __name__ == '__main__':