def __enter__(self):
log.debug("About to lock {}".format(self.lockfile))
if not self._acquire(block=False):
log.warning("Retrying lock acquisition on {}.".format(
self.lockfile))
self._acquire(block=True)
log.debug("Received lock on {}".format(self.lockfile))
def __commit_exists(self):
try:
cmd(self.__bare_path(), [
"git", "cat-file", "-e", "{}^{{commit}}".format(self.revision)
])
return True
except subprocess.CalledProcessError as e:
log.debug(
"Did not find commit {} and instead got output: {}".format(
self.revision, e.output))
return False
def cmd(cwd, command):
log.debug("Running {} in {}".format(
" ".join(command),
cwd
))
result = subprocess.run(command,
cwd=cwd,
stdout=subprocess.PIPE,
universal_newlines=True,
check=True)
log.debug("command output: {}".format(result.stdout))
return result
def make_archive(self):
if not self.__exists():
log.warning("Fetching tag '{}' from {}".format(
self.tag, self.cache.repository))
with self.cache.lock():
bare_path = self.__bare_path()
ref = "refs/tags/{}".format(self.tag)
setup_bare(bare_path)
try:
cmd(bare_path, [
"git", "fetch", "--depth=1", self.cache.repository, ref
])
except subprocess.CalledProcessError as e:
log.debug(
"Did not find tag {}, instead got output: {}".format(
self.tag, e.output))
raise NixError("tag-not-found",
"Tag {} not found".format(self.tag))
archive_ref(bare_path, "FETCH_HEAD", self.__archive_path())
return self.__archive_path()
def setup_bare(path):
if not os.path.isdir(path):
log.debug("About to init a bare repository at {}".format(path))
cmd(None, ["git", "init", "--bare", path])
def __exit__(self, *args):
log.debug("Releasing lock {}".format(self.lockfile))
self._release()