anvil/anvil/patcher.py

69 lines
2.3 KiB
Python

# vim: tabstop=4 shiftwidth=4 softtabstop=4
# Copyright (C) 2012 Yahoo! Inc. All Rights Reserved.
#
# Licensed under the Apache License, Version 2.0 (the "License"); you may
# not use this file except in compliance with the License. You may obtain
# a copy of the License at
#
# http://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
# WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
# License for the specific language governing permissions and limitations
# under the License.
from anvil import log as logging
from anvil import shell as sh
from anvil import utils
LOG = logging.getLogger(__name__)
PATCH_CMD = ['patch', '-p1']
GIT_PATCH_CMD = ['git', 'am']
def _is_patch(path, patch_ext='.patch'):
if not path.endswith(patch_ext):
return False
if not sh.isfile(path):
return False
return True
def expand_patches(paths, patch_ext='.patch'):
if not paths:
return []
all_paths = []
# Expand patch files/dirs
for path in paths:
path = sh.abspth(path)
if sh.isdir(path):
all_paths.extend([p for p in sh.listdir(path, files_only=True)])
else:
all_paths.append(path)
# Now filter on valid patches
return [p for p in all_paths if _is_patch(p, patch_ext=patch_ext)]
def apply_patches(patch_files, working_dir):
if not sh.isdir(working_dir):
LOG.warn("Can only apply patches 'inside' a directory and not '%s'",
working_dir)
return
already_applied = set()
for patch_ext, patch_cmd in [('.patch', PATCH_CMD), ('.git_patch', GIT_PATCH_CMD)]:
apply_files = expand_patches(patch_files, patch_ext=patch_ext)
apply_files = [p for p in apply_files if p not in already_applied]
if not apply_files:
continue
with utils.chdir(working_dir):
for p in apply_files:
LOG.debug("Applying patch %s using command %s in directory %s",
p, patch_cmd, working_dir)
patch_contents = sh.load_file(p)
if len(patch_contents):
sh.execute(patch_cmd, process_input=patch_contents)
already_applied.add(p)