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#
# Copyright (C) 2016 Intel Corporation
#
# Released under the MIT license (see COPYING.MIT)
#
"""Git repository interactions"""
import os
from oeqa.utils.commands import runCmd
class GitError(Exception):
"""Git error handling"""
pass
class GitRepo(object):
"""Class representing a Git repository clone"""
def __init__(self, path, is_topdir=False):
git_dir = self._run_git_cmd_at(['rev-parse', '--git-dir'], path)
git_dir = git_dir if os.path.isabs(git_dir) else os.path.join(path, git_dir)
self.git_dir = os.path.realpath(git_dir)
if self._run_git_cmd_at(['rev-parse', '--is-bare-repository'], path) == 'true':
self.bare = True
self.top_dir = self.git_dir
else:
self.bare = False
self.top_dir = self._run_git_cmd_at(['rev-parse', '--show-toplevel'],
path)
realpath = os.path.realpath(path)
if is_topdir and realpath != self.top_dir:
raise GitError("{} is not a Git top directory".format(realpath))
@staticmethod
def _run_git_cmd_at(git_args, cwd, **kwargs):
"""Run git command at a specified directory"""
git_cmd = 'git ' if isinstance(git_args, str) else ['git']
git_cmd += git_args
ret = runCmd(git_cmd, ignore_status=True, cwd=cwd, **kwargs)
if ret.status:
cmd_str = git_cmd if isinstance(git_cmd, str) \
else ' '.join(git_cmd)
raise GitError("'{}' failed with exit code {}: {}".format(
cmd_str, ret.status, ret.output))
return ret.output.strip()
@staticmethod
def init(path, bare=False):
"""Initialize a new Git repository"""
cmd = ['init']
if bare:
cmd.append('--bare')
GitRepo._run_git_cmd_at(cmd, cwd=path)
return GitRepo(path, is_topdir=True)
def run_cmd(self, git_args, env_update=None):
"""Run Git command"""
env = None
if env_update:
env = os.environ.copy()
env.update(env_update)
return self._run_git_cmd_at(git_args, self.top_dir, env=env)
def rev_parse(self, revision):
"""Do git rev-parse"""
try:
return self.run_cmd(['rev-parse', '--verify', revision])
except GitError:
# Revision does not exist
return None
def get_current_branch(self):
"""Get current branch"""
try:
# Strip 11 chars, i.e. 'refs/heads' from the beginning
return self.run_cmd(['symbolic-ref', 'HEAD'])[11:]
except GitError:
return None
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