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# 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 __future__ import absolute_import
from exec_util import exec_cmd
import os
import sys
# Git must be in the system PATH.
git_exe = 'git'
def is_checkout(path):
""" Returns true if the path represents a git checkout. """
return os.path.isdir(os.path.join(path, '.git'))
def get_hash(path='.', branch='HEAD'):
""" Returns the git hash for the specified branch/tag/hash. """
cmd = "%s rev-parse %s" % (git_exe, 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 = "%s config --get remote.origin.url" % git_exe
result = exec_cmd(cmd, path)
if result['out'] != '':
return result['out'].strip()
return 'Unknown'
def get_commit_number(path='.', branch='HEAD'):
""" Returns the number of commits in the specified branch/tag/hash. """
cmd = "%s rev-list --count %s" % (git_exe, branch)
result = exec_cmd(cmd, path)
if result['out'] != '':
return result['out'].strip()
return '0'
def get_changed_files(path, hash):
""" Retrieves the list of changed files. """
if hash == 'unstaged':
cmd = "%s diff --name-only" % git_exe
elif hash == 'staged':
cmd = "%s diff --name-only --cached" % git_exe
else:
cmd = "%s diff-tree --no-commit-id --name-only -r %s" % (git_exe, hash)
result = exec_cmd(cmd, path)
if result['out'] != '':
files = result['out']
if sys.platform == 'win32':
# Convert to Unix line endings.
files = files.replace('\r\n', '\n')
return files.strip().split("\n")
return []
def write_indented_output(output):
""" Apply a fixed amount of intent to lines before printing. """
if output == '':
return
for line in output.split('\n'):
line = line.strip()
if len(line) == 0:
continue
sys.stdout.write('\t%s\n' % line)
def git_apply_patch_file(patch_path, patch_dir):
""" Apply |patch_path| to files in |patch_dir|. """
patch_name = os.path.basename(patch_path)
sys.stdout.write('\nApply %s in %s\n' % (patch_name, patch_dir))
if not os.path.isfile(patch_path):
sys.stdout.write('... patch file does not exist.\n')
return 'fail'
patch_string = open(patch_path, 'rb').read()
if sys.platform == 'win32':
# Convert the patch to Unix line endings. This is necessary to avoid
# whitespace errors with git apply.
patch_string = patch_string.replace(b'\r\n', b'\n')
# Git apply fails silently if not run relative to a respository root.
if not is_checkout(patch_dir):
sys.stdout.write('... patch directory is not a repository root.\n')
return 'fail'
config = '-p0 --ignore-whitespace'
# Output patch contents.
cmd = '%s apply %s --numstat' % (git_exe, config)
result = exec_cmd(cmd, patch_dir, patch_string)
write_indented_output(result['out'].replace('<stdin>', patch_name))
# Reverse check to see if the patch has already been applied.
cmd = '%s apply %s --reverse --check' % (git_exe, config)
result = exec_cmd(cmd, patch_dir, patch_string)
if result['err'].find('error:') < 0:
sys.stdout.write('... already applied (skipping).\n')
return 'skip'
# Normal check to see if the patch can be applied cleanly.
cmd = '%s apply %s --check' % (git_exe, config)
result = exec_cmd(cmd, patch_dir, patch_string)
if result['err'].find('error:') >= 0:
sys.stdout.write('... failed to apply:\n')
write_indented_output(result['err'].replace('<stdin>', patch_name))
return 'fail'
# Apply the patch file. This should always succeed because the previous
# command succeeded.
cmd = '%s apply %s' % (git_exe, config)
result = exec_cmd(cmd, patch_dir, patch_string)
if result['err'] == '':
sys.stdout.write('... successfully applied.\n')
else:
sys.stdout.write('... successfully applied (with warnings):\n')
write_indented_output(result['err'].replace('<stdin>', patch_name))
return 'apply'
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