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repocache.py
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repocache.py
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import string
from pathlib import Path
import subprocess as sp
class RepoCache(object):
PATH = Path("repocache/")
def __init__(self):
if not self.PATH.exists():
self.PATH.mkdir()
assert self.PATH.is_dir()
@staticmethod
def repo_name(url):
if url.endswith("/"):
url = url[:-1]
if url.endswith(".git"):
url = url[:-4]
owner, name = url.replace("+", "").rsplit("/")[-2:]
while "__" in owner:
owner = owner.replace("__", "_")
return f"{owner}__{name}"
def latest_hash(self, url):
return sp.check_output(["git", "rev-parse", "HEAD"], cwd=self.PATH).strip().decode("utf-8")
def _clone(self, name, url):
try:
sp.run(
["git", "clone", url, name],
cwd=self.PATH,
check=True, stdout=sp.DEVNULL
)
except sp.CalledProcessError as err:
raise Exception("Error cloning repository {0}: {1}".format(name, err))
def _pull(self, name):
try:
sp.run(
["git", "pull"],
cwd=(self.PATH / name),
check=True, stdout=sp.DEVNULL
)
except sp.CalledProcessError as err:
raise Exception("Error pulling from repository {0}: {1}".format(name, err))
def _download(self, name, url, pull=True):
if (self.PATH / name).exists():
if pull:
self._pull(name)
else:
self._clone(name, url)
def get(self, url, pull=True):
name = RepoCache.repo_name(url)
self._download(name, url, pull)
return self.PATH / name
def get_cached(self, url):
return (self.PATH / RepoCache.repo_name(url)).resolve(strict=True)