+# git-cache: Cache git content locally
+#
+# 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, version 3.
+
+
# It would be nice if we could share the nix git cache, but as of the
# time of writing it is transitioning from gitv2 (deprecated) to gitv3
# (not ready yet), and trying to straddle them both is too far into nix
# It would be nice if we could share the nix git cache, but as of the
# time of writing it is transitioning from gitv2 (deprecated) to gitv3
# (not ready yet), and trying to straddle them both is too far into nix
Path = str # eg: "/home/user/.cache/git-cache/v1"
Repo = str # eg: "https://github.com/NixOS/nixpkgs.git"
Ref = str # eg: "master" or "v1.0.0"
Path = str # eg: "/home/user/.cache/git-cache/v1"
Repo = str # eg: "https://github.com/NixOS/nixpkgs.git"
Ref = str # eg: "master" or "v1.0.0"
ancestor: RefOrRev,
force: bool = False) -> None:
if not force and not is_ancestor(repo, descendant, ancestor):
ancestor: RefOrRev,
force: bool = False) -> None:
if not force and not is_ancestor(repo, descendant, ancestor):
subprocess.run(['git', '-C', cachedir, 'fetch'] +
(['--force'] if force else []) +
subprocess.run(['git', '-C', cachedir, 'fetch'] +
(['--force'] if force else []) +
def fetch(repo: Repo, ref: Ref, force: bool = False) -> Tuple[Path, Rev]:
def fetch(repo: Repo, ref: Ref, force: bool = False) -> Tuple[Path, Rev]:
logging.debug('Fetching ref "%s" from %s', ref, repo)
_git_fetch(cachedir, repo, ref, force=force)
logging.debug('Fetching ref "%s" from %s', ref, repo)
_git_fetch(cachedir, repo, ref, force=force)
- with open(os.path.join(cachedir, 'refs', 'heads', ref), encoding='utf-8') as rev_file:
+ rev_path = (['tags', ref.removeprefix('tag ')]
+ if ref.startswith('tag ')
+ else ['heads', ref])
+ with open(os.path.join(cachedir, 'refs', *rev_path), encoding='utf-8') as rev_file:
rev = Rev(rev_file.read(999).strip())
verify_ancestry(repo, ref, rev, force=force)
_log_fetch(repo, ref, rev, force=force)
rev = Rev(rev_file.read(999).strip())
verify_ancestry(repo, ref, rev, force=force)
_log_fetch(repo, ref, rev, force=force)