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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 os
import sys
import subprocess
from error import GitError
GIT = 'git'
MIN_GIT_VERSION = (1, 5, 4)
GIT_DIR = 'GIT_DIR'
REPO_TRACE = 'REPO_TRACE'
LAST_GITDIR = None
LAST_CWD = None
try:
TRACE = os.environ[REPO_TRACE] == '1'
except KeyError:
TRACE = False
class _GitCall(object):
def version(self):
p = GitCommand(None, ['--version'], capture_stdout=True)
if p.Wait() == 0:
return p.stdout
return None
def __getattr__(self, name):
name = name.replace('_','-')
def fun(*cmdv):
command = [name]
command.extend(cmdv)
return GitCommand(None, command).Wait() == 0
return fun
git = _GitCall()
class GitCommand(object):
def __init__(self,
project,
cmdv,
bare = False,
provide_stdin = False,
capture_stdout = False,
capture_stderr = False,
disable_editor = False,
cwd = None,
gitdir = None):
env = dict(os.environ)
for e in [REPO_TRACE,
GIT_DIR,
'GIT_ALTERNATE_OBJECT_DIRECTORIES',
'GIT_OBJECT_DIRECTORY',
'GIT_WORK_TREE',
'GIT_GRAFT_FILE',
'GIT_INDEX_FILE']:
if e in env:
del env[e]
if disable_editor:
env['GIT_EDITOR'] = ':'
if project:
if not cwd:
cwd = project.worktree
if not gitdir:
gitdir = project.gitdir
command = [GIT]
if bare:
if gitdir:
env[GIT_DIR] = gitdir
cwd = None
command.extend(cmdv)
if provide_stdin:
stdin = subprocess.PIPE
else:
stdin = None
if capture_stdout:
stdout = subprocess.PIPE
else:
stdout = None
if capture_stderr:
stderr = subprocess.PIPE
else:
stderr = None
if TRACE:
global LAST_CWD
global LAST_GITDIR
dbg = ''
if cwd and LAST_CWD != cwd:
if LAST_GITDIR or LAST_CWD:
dbg += '\n'
dbg += ': cd %s\n' % cwd
LAST_CWD = cwd
if GIT_DIR in env and LAST_GITDIR != env[GIT_DIR]:
if LAST_GITDIR or LAST_CWD:
dbg += '\n'
dbg += ': export GIT_DIR=%s\n' % env[GIT_DIR]
LAST_GITDIR = env[GIT_DIR]
dbg += ': '
dbg += ' '.join(command)
if stdin == subprocess.PIPE:
dbg += ' 0<|'
if stdout == subprocess.PIPE:
dbg += ' 1>|'
if stderr == subprocess.PIPE:
dbg += ' 2>|'
print >>sys.stderr, dbg
try:
p = subprocess.Popen(command,
cwd = cwd,
env = env,
stdin = stdin,
stdout = stdout,
stderr = stderr)
except Exception, e:
raise GitError('%s: %s' % (command[1], e))
self.process = p
self.stdin = p.stdin
def Wait(self):
p = self.process
if p.stdin:
p.stdin.close()
self.stdin = None
if p.stdout:
self.stdout = p.stdout.read()
p.stdout.close()
else:
p.stdout = None
if p.stderr:
self.stderr = p.stderr.read()
p.stderr.close()
else:
p.stderr = None
return self.process.wait()
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