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"""Git utilities, adopted from mypy's git utilities (https://github.com/python/mypy/blob/master/mypy/git.py)."""
from __future__ import annotations
import os
import subprocess
def is_git_repo(dir: str) -> bool:
"""Is the given directory version-controlled with git?"""
return os.path.exists(os.path.join(dir, '.git'))
def have_git() -> bool:
"""Can we run the git executable?"""
try:
subprocess.check_output(['git', '--help'])
return True
except subprocess.CalledProcessError:
return False
except OSError:
return False
def git_revision(dir: str) -> str:
"""Get the SHA-1 of the HEAD of a git repository."""
return subprocess.check_output(['git', 'rev-parse', '--short', 'HEAD'], cwd=dir).decode('utf-8').strip()
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