Update scripts to support git checkouts of CEF and/or Chromium.

git-svn-id: https://chromiumembedded.googlecode.com/svn/trunk@1664 5089003a-bbd8-11dd-ad1f-f1f9622dbc98

tools/git_util.py

@@ -1,26 +1,44 @@
-# Copyright (c) 2012 The Chromium Embedded Framework Authors. All rights
+# Copyright (c) 2014 The Chromium Embedded Framework Authors. All rights
 # reserved. Use of this source code is governed by a BSD-style license that
 # can be found in the LICENSE file
 
-from subprocess import Popen, PIPE
-import sys
+from exec_util import exec_cmd
+import os
 
-def get_svn_revision(path=".", branch="master"):
-    svn_rev = "None"
-    cmd = ("git log --grep=^git-svn-id: -n 1 %s" % branch).split()
-    try:
-        process = Popen(cmd, cwd=path, stdout = PIPE, stderr = PIPE,
-                        shell=(sys.platform == 'win32'))
-        for line in process.stdout:
-            if line.find("git-svn-id") > 0:
-                svn_rev = line.split("@")[1].split()[0]
-                break
-    except IOError, (errno, strerror):
-        sys.stderr.write('Failed to read git log: ' + strerror + "\n")
-        raise
-    return svn_rev
+def is_checkout(path):
+  """ Returns true if the path represents a git checkout. """
+  return os.path.exists(os.path.join(path, '.git'))
 
-def get_changed_files(path="."):
+def get_hash(path = '.', branch = 'master'):
+  """ Returns the git hash for the specified branch/tag/hash. """
+  cmd = "git rev-parse %s" % (branch)
+  result = exec_cmd(cmd, path)
+  if result['out'] != '':
+    return result['out'].strip()
+  return 'Unknown'
+
+def get_url(path = '.'):
+  """ Returns the origin url for the specified path. """
+  cmd = "git config --get remote.origin.url"
+  result = exec_cmd(cmd, path)
+  if result['out'] != '':
+    return result['out'].strip()
+  return 'Unknown'
+
+def get_svn_revision(path = '.', branch = 'master'):
+  """ Returns the SVN revision associated with the specified path and git
+      branch/tag/hash. """
+  svn_rev = "None"
+  cmd = "git log --grep=^git-svn-id: -n 1 %s" % (branch)
+  result = exec_cmd(cmd, path)
+  if result['err'] == '':
+    for line in result['out'].split('\n'):
+      if line.find("git-svn-id") > 0:
+        svn_rev = line.split("@")[1].split()[0]
+        break
+  return svn_rev
+
+def get_changed_files(path = '.'):
   """ Retrieves the list of changed files. """
   # not implemented
   return []