# Copyright (C) 2007 Chris Ball <chris@printf.net>
#
# This program is free software; you can redistribute it and/or modify
# it under the terms of the GNU General Public License as published by
# the Free Software Foundation; either version 2 of the License, or
# (at your option) any later version.
#
# This program is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
# GNU General Public License for more details.
#
# You should have received a copy of the GNU General Public License
# along with this program; if not, write to the Free Software
# Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
import os
import tempfile
from rcs import invoke
def strip_git(filename):
# Find the base path of the GIT tree, in order to strip that leading
# path from arguments to git -- it doesn't like absolute paths.
if os.path.isabs(filename):
filename = filename[len(git_repo_for_path('.'))+1:]
return filename
def invoke_client(*args, **kwargs):
directory = kwargs['directory']
expect = kwargs.get('expect', (0, 1))
cl_args = ["git"]
cl_args.extend(args)
status,output,error = invoke(cl_args, expect, cwd=directory)
return status, output
def add_id(filename, paranoid=False):
filename = strip_git(filename)
invoke_client("add", filename, directory=git_repo_for_path('.'))
def delete_id(filename):
filename = strip_git(filename)
invoke_client("rm", filename, directory=git_repo_for_path('.'))
def mkdir(path, paranoid=False):
os.mkdir(path)
def set_file_contents(path, contents):
add = not os.path.exists(path)
file(path, "wb").write(contents)
if add:
add_id(path)
def detect(path):
"""Detect whether a directory is revision-controlled using GIT"""
path = os.path.realpath(path)
old_path = None
while True:
if os.path.exists(os.path.join(path, ".git")):
return True
if path == old_path:
return False
old_path = path
path = os.path.dirname(path)
def precommit(directory):
pass
def commit(directory, summary, body=None):
if body is not None:
summary += '\n' + body
descriptor, filename = tempfile.mkstemp()
try:
temp_file = os.fdopen(descriptor, 'wb')
temp_file.write(summary)
temp_file.close()
invoke_client('commit', '-a', '-F', filename, directory=directory)
finally:
os.unlink(filename)
def postcommit(directory):
pass
# In order to diff the bug database, you need a way to check out arbitrary
# previous revisions and a mechanism for locating the bug_dir in the revision
# you've checked out.
#
# Copying the Mercurial implementation, this feature is implemented by four
# functions:
#
# git_dir_for_path : find '.git' for a git tree.
#
# export : check out a commit 'spec' from git-repo 'bug_dir' into a dir
# 'revision_dir'
#
# find_or_make_export : check out a commit 'spec' from git repo 'directory' to
# any location you please and return the path to the checkout
#
# path_in_reference : return a path to the bug_dir of the commit 'spec'
def git_repo_for_path(path):
"""Find the root of the deepest repository containing path."""
# Assume that nothing funny is going on; in particular, that we aren't
# dealing with a bare repo.
return os.path.dirname(git_dir_for_path(path))
def git_dir_for_path(path):
"""Find the git-dir of the deepest repo containing path."""
return invoke_client("rev-parse", "--git-dir", directory=path)[1].rstrip()
def export(spec, bug_dir, revision_dir):
"""Check out commit 'spec' from the git repo containing bug_dir into
'revision_dir'."""
if not os.path.exists(revision_dir):
os.makedirs(revision_dir)
invoke_client("init", directory=revision_dir)
invoke_client("pull", git_dir_for_path(bug_dir), directory=revision_dir)
invoke_client("checkout", '-f', spec, directory=revision_dir)
def find_or_make_export(spec, directory):
"""Checkout 'spec' from the repo at 'directory' by hook or by crook and
return the path to the working copy."""
home = os.path.expanduser("~")
revision_root = os.path.join(home, ".be_revs")
if not os.path.exists(revision_root):
os.mkdir(revision_root)
revision_dir = os.path.join(revision_root, spec)
if not os.path.exists(revision_dir):
export(spec, directory, revision_dir)
return revision_dir
def path_in_reference(bug_dir, spec):
"""Check out 'spec' and return the path to its bug_dir."""
spec = spec or 'HEAD'
spec = invoke_client('rev-parse', spec, directory=bug_dir)[1].rstrip()
# This is a really hairy computation.
# The theory is that we can't possibly be working out of a bare repo;
# hence, we get the rel_bug_dir by chopping off dirname(git_dir_for_path(bug_dir))
# + '/'.
rel_bug_dir = strip_git(bug_dir)
export_root = find_or_make_export(spec, directory=bug_dir)
return os.path.join(export_root, rel_bug_dir)
name = "git"
