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#!/usr/bin/env python3
from __future__ import annotations
import argparse
import gzip
import os.path
import shutil
import subprocess
import tarfile
import tempfile
from collections.abc import Sequence
# This is a script for generating the tarred resources for git repo
# dependencies. Currently it's just for "vendoring" ruby support packages.
REPOS = (
('rbenv', 'https://github.com/rbenv/rbenv', '38e1fbb'),
('ruby-build', 'https://github.com/rbenv/ruby-build', '855b963'),
(
'ruby-download',
'https://github.com/garnieretienne/rvm-download',
'09bd7c6',
),
)
def reset(tarinfo: tarfile.TarInfo) -> tarfile.TarInfo:
tarinfo.uid = tarinfo.gid = 0
tarinfo.uname = tarinfo.gname = 'root'
tarinfo.mtime = 0
return tarinfo
def make_archive(name: str, repo: str, ref: str, destdir: str) -> str:
output_path = os.path.join(destdir, f'{name}.tar.gz')
with tempfile.TemporaryDirectory() as tmpdir:
# this ensures that the root directory has umask permissions
gitdir = os.path.join(tmpdir, 'root')
# Clone the repository to the temporary directory
subprocess.check_call(('git', 'clone', repo, gitdir))
subprocess.check_call(('git', '-C', gitdir, 'checkout', ref))
# We don't want the '.git' directory
# It adds a bunch of size to the archive and we don't use it at
# runtime
shutil.rmtree(os.path.join(gitdir, '.git'))
arcs = [(name, gitdir)]
for root, dirs, filenames in os.walk(gitdir):
for filename in dirs + filenames:
abspath = os.path.abspath(os.path.join(root, filename))
relpath = os.path.relpath(abspath, gitdir)
arcs.append((os.path.join(name, relpath), abspath))
arcs.sort()
with gzip.GzipFile(output_path, 'wb', mtime=0) as gzipf:
# https://github.com/python/typeshed/issues/5491
with tarfile.open(fileobj=gzipf, mode='w') as tf: # type: ignore
for arcname, abspath in arcs:
tf.add(
abspath,
arcname=arcname,
recursive=False,
filter=reset,
)
return output_path
def main(argv: Sequence[str] | None = None) -> int:
parser = argparse.ArgumentParser()
parser.add_argument('--dest', default='pre_commit/resources')
args = parser.parse_args(argv)
for archive_name, repo, ref in REPOS:
print(f'Making {archive_name}.tar.gz for {repo}@{ref}')
make_archive(archive_name, repo, ref, args.dest)
return 0
if __name__ == '__main__':
raise SystemExit(main())
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