Re-save XIB files using Xcode 4.4.1 on Mac OS X 10.8.1.

This also adds a PRESUBMIT check to enforce the policy described here:
http://dev.chromium.org/developers/design-documents/mac-xib-files

BUG=149763
TEST=Build chrome target on 10.6 with Xcode 3.2. Chromium.app launches and works.
TBR=mark@chromium.org

Review URL: https://chromiumcodereview.appspot.com/10950010

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@157690 0039d316-1c4b-4281-b951-d872f2087c98

chrome/app/nibs/PRESUBMIT.py

@@ -0,0 +1,84 @@
+# Copyright (c) 2012 The Chromium Authors. All rights reserved.
+# Use of this source code is governed by a BSD-style license that can be
+# found in the LICENSE file.
+
+"""Presubmit script to verify that XIB changes are done with the right version.
+
+See http://dev.chromium.org/developers/design-documents/mac-xib-files for more
+information.
+"""
+
+import re
+
+# Minimum is Mac OS X 10.8.1 (12B19).
+HUMAN_DARWIN_VERSION = '10.8.x, x >= 1'
+ALLOWED_DARWIN_VERSION = 12  # Darwin 12 = 10.8.
+MINIMUM_DARWIN_RELEASE = 'B'  # Release B = 10.8.1.
+
+MINIMUM_IB_VERSION = 2549  # Xcode 4.4.1.
+MAXIMUM_IB_VERSION = 2800  # Xcode 4.5.x.
+HUMAN_IB_VERSION = '4.4.x, x >= 1'
+
+SYSTEM_VERSION_RE = r'<string key="IBDocument\.SystemVersion">' + \
+    '([0-9]{,2})([A-Z])([0-9]+)</string>'
+
+IB_VERSION_RE = \
+    r'<string key="IBDocument\.InterfaceBuilderVersion">([0-9]+)</string>'
+
+def _CheckXIBSystemAndXcodeVersions(input_api, output_api, error_type):
+  affected_xibs = [x for x in input_api.AffectedFiles()
+      if x.LocalPath().endswith('.xib')]
+
+  incorrect_system_versions = []
+  incorrect_ib_versions = []
+
+  for xib in affected_xibs:
+    system_version = None
+    ib_version = None
+    for line in xib.NewContents():
+      m = re.search(SYSTEM_VERSION_RE, line)
+      if m:
+        system_version = (m.group(1), m.group(2), m.group(3))
+
+      m = re.search(IB_VERSION_RE, line)
+      if m:
+        ib_version = m.group(1)
+
+      if system_version is not None and ib_version is not None:
+        break
+
+    if system_version is None:
+      incorrect_system_versions.append(xib.LocalPath())
+      continue
+    if int(system_version[0]) != ALLOWED_DARWIN_VERSION:
+      incorrect_system_versions.append(xib.LocalPath())
+      continue
+    if system_version[1] < MINIMUM_DARWIN_RELEASE:
+      incorrect_system_versions.append(xib.LocalPath())
+      continue
+
+    if ib_version is None or int(ib_version) < MINIMUM_IB_VERSION or \
+       int(ib_version) >= MAXIMUM_IB_VERSION:
+      incorrect_ib_versions.append(xib.LocalPath())
+      continue
+
+  problems = []
+  if incorrect_system_versions:
+    problems.append(error_type(
+        'XIB files need to be saved on Mac OS X ' + HUMAN_DARWIN_VERSION,
+        items=incorrect_system_versions))
+  if incorrect_ib_versions:
+    problems.append(error_type(
+        'XIB files need to be saved using Xcode ' + HUMAN_IB_VERSION,
+        items=incorrect_ib_versions))
+  return problems
+
+def CheckChangeOnUpload(input_api, output_api):
+  # Allow uploads to happen even if the presubmit fails, so that contributors
+  # can ask their reviewer or another person to re-save the XIBs for them.
+  return _CheckXIBSystemAndXcodeVersions(input_api, output_api,
+      error_type=output_api.PresubmitPromptWarning)
+
+def CheckChangeOnCommit(input_api, output_api):
+  return _CheckXIBSystemAndXcodeVersions(input_api, output_api,
+      error_type=output_api.PresubmitError)