Fix compatibility with Xcode4.3 git

Xcode 4.3 git returns the version like below:

git version 1.7.7.5 (Apple Git-26)

Modify GIT.AssertVersion to accept such input.

Also modify tests/gclient_scm_test.py to pass tests, but not sure
the fix is collect.

BUG=chromium:115576
TEST=ran tests/gclient_scm_test.py

Review URL: http://codereview.chromium.org/9443047

git-svn-id: svn://svn.chromium.org/chrome/trunk/tools/depot_tools@123399 0039d316-1c4b-4281-b951-d872f2087c98

scm.py

@@ -415,7 +415,9 @@ class GIT(object):
   def AssertVersion(cls, min_version):
     """Asserts git's version is at least min_version."""
     if cls.current_version is None:
-      cls.current_version = cls.Capture(['--version'], '.').split()[-1]
+      current_version = cls.Capture(['--version'], '.')
+      matched = re.search(r'version ([0-9\.]+)', current_version)
+      cls.current_version = matched.group(1)
     current_version_list = map(only_int, cls.current_version.split('.'))
     for min_ver in map(int, min_version.split('.')):
       ver = current_version_list.pop(0)

tests/gclient_scm_test.py

@@ -948,7 +948,7 @@ class ManagedGitWrapperTestCase(BaseGitWrapperTestCase):
         "\n_____ foo at refs/heads/master\n\n"
         "________ running 'git clone --progress -b master --verbose %s %s'"
         " in '%s'\n"
-        "Cloning into %s...\ndone.\n") % (
+        "Cloning into '%s'...\ndone.\n") % (
           join(self.root_dir, '.', '.git'),
           join(root_dir, 'foo'),
           root_dir,
@@ -1263,7 +1263,7 @@ class UnmanagedGitWrapperTestCase(BaseGitWrapperTestCase):
         "\n_____ foo at refs/heads/master\n\n"
         "________ running 'git clone --progress -b master --verbose %s %s'"
         " in '%s'\n"
-        "Cloning into %s...\ndone.\n") % (
+        "Cloning into '%s'...\ndone.\n") % (
           join(self.root_dir, '.', '.git'),
           join(root_dir, 'foo'),
           root_dir,