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# This Source Code Form is subject to the terms of the Mozilla Public
# License, v. 2.0. If a copy of the MPL was not distributed with this,
# file, You can obtain one at http://mozilla.org/MPL/2.0/.
import subprocess
from pathlib import Path
from typing import Union
# The logic here is far from robust. Improvements are welcome.
def update_mercurial_repo(
hg: str,
repo,
path: Union[str, Path],
revision="default",
hostfingerprints=None,
global_args=None,
):
"""Ensure a HG repository exists at a path and is up to date."""
hostfingerprints = hostfingerprints or {}
path = Path(path)
args = [hg]
if global_args:
args.extend(global_args)
for host, fingerprint in sorted(hostfingerprints.items()):
args.extend(["--config", "hostfingerprints.%s=%s" % (host, fingerprint)])
if path.exists():
subprocess.check_call(args + ["pull", repo], cwd=str(path))
else:
subprocess.check_call(args + ["clone", repo, str(path)])
subprocess.check_call([hg, "update", "-r", revision], cwd=str(path))
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