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# Copyright (C) 2008 The Android Open Source Project
#
# 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.
import functools
import io
import multiprocessing
from command import DEFAULT_LOCAL_JOBS, PagedCommand, WORKER_BATCH_SIZE
class Diff(PagedCommand):
common = True
helpSummary = "Show changes between commit and working tree"
helpUsage = """
%prog [<project>...]
The -u option causes '%prog' to generate diff output with file paths
relative to the repository root, so the output can be applied
to the Unix 'patch' command.
"""
PARALLEL_JOBS = DEFAULT_LOCAL_JOBS
def _Options(self, p):
super()._Options(p)
p.add_option('-u', '--absolute',
dest='absolute', action='store_true',
help='Paths are relative to the repository root')
def _DiffHelper(self, absolute, project):
"""Obtains the diff for a specific project.
Args:
absolute: Paths are relative to the root.
project: Project to get status of.
Returns:
The status of the project.
"""
buf = io.StringIO()
ret = project.PrintWorkTreeDiff(absolute, output_redir=buf)
return (ret, buf.getvalue())
def Execute(self, opt, args):
ret = 0
all_projects = self.GetProjects(args)
# NB: Multiprocessing is heavy, so don't spin it up for one job.
if len(all_projects) == 1 or opt.jobs == 1:
for project in all_projects:
if not project.PrintWorkTreeDiff(opt.absolute):
ret = 1
else:
with multiprocessing.Pool(opt.jobs) as pool:
states = pool.imap(functools.partial(self._DiffHelper, opt.absolute),
all_projects, WORKER_BATCH_SIZE)
for (state, output) in states:
if output:
print(output, end='')
if not state:
ret = 1
return ret
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