Make git try work on Windows.

This mirrors the git-cl changes by first moving git-try
to git_try.py (which git cl already had), then copying
git-cl to git-try and updating all references to git-cl
and git_cl.py to the corresponding git try references.

The main issue is that in the MINGW/Msysgit case we want
to use the Python in depot_tools since that is 100%
compatible with the Command Prompt.  Hence we need
to call it directly and then pass it the name of the
git_try.py script.

Note that 'git-try' will not (ever) work on Windows,
and users should only ever run 'git try'.  Hence the
need to modify the output of the command to avoid
further confusion.
Review URL: http://codereview.chromium.org/7114002

git-svn-id: svn://svn.chromium.org/chrome/trunk/tools/depot_tools@89031 0039d316-1c4b-4281-b951-d872f2087c98

git-try

-#!/usr/bin/python
-# Copyright (c) 2010 The Chromium Authors. All rights reserved.
+#!/bin/sh
+# Copyright (c) 2011 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.
-"""Wrapper for trychange.py for git checkout."""
 
-import logging
-import sys
+base_dir=$(dirname "$0")
 
-import breakpad  # pylint: disable=W0611
+# Test if this script is running under a MSys install.  If it is, we will
+# hardcode the path to Python where possible.
+OUTPUT="$(uname | grep 'MINGW')"
+MINGW=$?
 
-import gclient_utils
-from scm import GIT
-import third_party.upload
-import trychange
-
-
-def GetRietveldIssueNumber():
-  try:
-    return GIT.Capture(
-        ['config', 'branch.%s.rietveldissue' % GIT.GetBranch(None)])
-  except gclient_utils.Error:
-    return None
-
-
-def GetRietveldPatchsetNumber():
-  try:
-    return GIT.Capture(
-        ['config', 'branch.%s.rietveldpatchset' % GIT.GetBranch(None)])
-  except gclient_utils.Error:
-    return None
-
-
-def GetRietveldServerUrl():
-  try:
-    return GIT.Capture(['config', 'rietveld.server']).strip()
-  except gclient_utils.Error:
-    return None
-
-
-if __name__ == '__main__':
-  args = sys.argv[1:]
-  patchset = GetRietveldPatchsetNumber()
-  if patchset:
-    args.extend([
-        '--issue', GetRietveldIssueNumber(),
-        '--patchset', patchset,
-    ])
-  else:
-    rietveld_url = GetRietveldServerUrl()
-    if rietveld_url:
-      args.extend(['--rietveld_url', GetRietveldServerUrl()])
-  # Hack around a limitation in logging.
-  logging.getLogger().handlers = []
-  try:
-    sys.exit(trychange.TryChange(
-        args, file_list=[], swallow_exception=False,
-        prog='git-try',
-        extra_epilog='\n'
-                     'git-try will diff against your tracked branch and will '
-                     'detect your rietveld\n'
-                     'code review if you are using git-cl\n'))
-  except third_party.upload.ClientLoginError, e:
-    print('Got an exception while trying to log in to Rietveld.')
-    print(str(e))
+if [ -d "$base_dir/python_bin" -a $MINGW = 0 ]; then
+  exec "$base_dir/python_bin/python.exe" "$base_dir"/git_try.py "$@"
+else
+  exec "$base_dir/git_try.py" "$@"
+fi

git_try.py

+#!/usr/bin/python
+# Copyright (c) 2011 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.
+"""Wrapper for trychange.py for git checkout."""
+
+import logging
+import sys
+
+import breakpad  # pylint: disable=W0611
+
+import gclient_utils
+from scm import GIT
+import third_party.upload
+import trychange
+
+
+def GetRietveldIssueNumber():
+  try:
+    return GIT.Capture(
+        ['config', 'branch.%s.rietveldissue' % GIT.GetBranch(None)])
+  except gclient_utils.Error:
+    return None
+
+
+def GetRietveldPatchsetNumber():
+  try:
+    return GIT.Capture(
+        ['config', 'branch.%s.rietveldpatchset' % GIT.GetBranch(None)])
+  except gclient_utils.Error:
+    return None
+
+
+def GetRietveldServerUrl():
+  try:
+    return GIT.Capture(['config', 'rietveld.server']).strip()
+  except gclient_utils.Error:
+    return None
+
+
+if __name__ == '__main__':
+  args = sys.argv[1:]
+  patchset = GetRietveldPatchsetNumber()
+  if patchset:
+    args.extend([
+        '--issue', GetRietveldIssueNumber(),
+        '--patchset', patchset,
+    ])
+  else:
+    rietveld_url = GetRietveldServerUrl()
+    if rietveld_url:
+      args.extend(['--rietveld_url', GetRietveldServerUrl()])
+  # Hack around a limitation in logging.
+  logging.getLogger().handlers = []
+  try:
+    sys.exit(trychange.TryChange(
+        args, file_list=[], swallow_exception=False,
+        prog='git-try',
+        extra_epilog='\n'
+                     'git try will diff against your tracked branch and will '
+                     'detect your rietveld\n'
+                     'code review if you are using git-cl\n'))
+  except third_party.upload.ClientLoginError, e:
+    print('Got an exception while trying to log in to Rietveld.')
+    print(str(e))