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import os
import re
import subprocess
import sys
from gitosis import util
class GitError(Exception):
"""git failed"""
def __str__(self):
return '%s: %s' % (self.__doc__, ': '.join(self.args))
class GitInitError(Exception):
"""git init failed"""
def init(
path,
template=None,
_git=None,
):
if _git is None:
_git = 'git'
util.mkdir(path, 0750)
args = [_git, 'init']
if template is not None:
args.append('--template=%s' % template)
returncode = subprocess.call(
args=args,
cwd=path,
stdout=sys.stderr,
close_fds=True,
env=dict(GIT_DIR='.'),
)
if returncode != 0:
raise GitInitError('exit status %d' % returncode)
class GitFastImportError(GitError):
"""git fast-import failed"""
pass
def fast_import(
git_dir,
commit_msg,
committer,
files,
):
"""
Create an initial commit.
"""
init(path=git_dir)
child = subprocess.Popen(
args=['git', 'fast-import', '--quiet', '--date-format=now'],
cwd=git_dir,
stdin=subprocess.PIPE,
close_fds=True,
env=dict(GIT_DIR=git_dir),
)
files = list(files)
for index, (path, content) in enumerate(files):
child.stdin.write("""\
blob
mark :%(mark)d
data %(len)d
%(content)s
""" % dict(
mark=index+1,
len=len(content),
content=content,
))
child.stdin.write("""\
commit refs/heads/master
committer %(committer)s now
data %(commit_msg_len)d
%(commit_msg)s
""" % dict(
committer=committer,
commit_msg_len=len(commit_msg),
commit_msg=commit_msg,
))
for index, (path, content) in enumerate(files):
child.stdin.write('M 100644 :%d %s\n' % (index+1, path))
child.stdin.close()
returncode = child.wait()
if returncode != 0:
raise GitFastImportError(
'git fast-import failed', 'exit status %d' % returncode)
class GitExportError(GitError):
"""Export failed"""
pass
class GitReadTreeError(GitExportError):
"""git read-tree failed"""
class GitCheckoutIndexError(GitExportError):
"""git checkout-index failed"""
def export(git_dir, path):
# it's a literal prefix for git, a trailing slash is needed to
# extract to the subdirectory
path = os.path.join(path, '')
returncode = subprocess.call(
args=['git', 'read-tree', 'HEAD'],
close_fds=True,
env=dict(GIT_DIR=git_dir),
)
if returncode != 0:
raise GitReadTreeError('exit status %d' % returncode)
returncode = subprocess.call(
args=[
'git',
'checkout-index',
'-a',
'-f',
'--prefix=%s' % path,
],
close_fds=True,
env=dict(GIT_DIR=git_dir),
)
if returncode != 0:
raise GitCheckoutIndexError('exit status %d' % returncode)
class GitHasInitialCommitError(GitError):
"""Check for initial commit failed"""
class GitRevParseError(GitError):
"""rev-parse failed"""
def has_initial_commit(git_dir):
child = subprocess.Popen(
args=['git', 'rev-parse', 'HEAD'],
cwd=git_dir,
stdout=subprocess.PIPE,
close_fds=True,
env=dict(GIT_DIR='.'),
)
got = child.stdout.read()
returncode = child.wait()
if returncode != 0:
raise GitRevParseError('exit status %d' % returncode)
if got == 'HEAD\n':
return False
elif re.match('^[0-9a-f]{40}\n$', got):
return True
else:
raise GitHasInitialCommitError('Unknown git HEAD: %r' % got)
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