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import argparse

import logging

import os.path

from typing import Optional

from typing import Tuple

import pre_commit.constants as C

from pre_commit import git

from pre_commit import output

from pre_commit.clientlib import load_manifest

from pre_commit.commands.run import run

from pre_commit.store import Store

from pre_commit.util import cmd_output_b

from pre_commit.util import tmpdir

from pre_commit.util import yaml_dump

from pre_commit.xargs import xargs

logger = logging.getLogger(__name__)

def _repo_ref(tmpdir: str, repo: str, ref: Optional[str]) -> Tuple[str, str]:

# if `ref` is explicitly passed, use it

if ref is not None:

return repo, ref

ref = git.head_rev(repo)

# if it exists on disk, we'll try and clone it with the local changes

if os.path.exists(repo) and git.has_diff('HEAD', repo=repo):

logger.warning('Creating temporary repo with uncommitted changes...')

shadow = os.path.join(tmpdir, 'shadow-repo')

cmd_output_b('git', 'clone', repo, shadow)

cmd_output_b('git', 'checkout', ref, '-b', '_pc_tmp', cwd=shadow)

idx = git.git_path('index', repo=shadow)

objs = git.git_path('objects', repo=shadow)

env = dict(os.environ, GIT_INDEX_FILE=idx, GIT_OBJECT_DIRECTORY=objs)

staged_files = git.get_staged_files(cwd=repo)

if staged_files:

xargs(('git', 'add', '--'), staged_files, cwd=repo, env=env)

cmd_output_b('git', 'add', '-u', cwd=repo, env=env)

git.commit(repo=shadow)

return shadow, git.head_rev(shadow)

else:

return repo, ref

def try_repo(args: argparse.Namespace) -> int:

with tmpdir() as tempdir:

repo, ref = _repo_ref(tempdir, args.repo, args.ref)

store = Store(tempdir)

if args.hook:

hooks = [{'id': args.hook}]

else:

repo_path = store.clone(repo, ref)

manifest = load_manifest(os.path.join(repo_path, C.MANIFEST_FILE))

manifest = sorted(manifest, key=lambda hook: hook['id'])

hooks = [{'id': hook['id']} for hook in manifest]

config = {'repos': [{'repo': repo, 'rev': ref, 'hooks': hooks}]}

config_s = yaml_dump(config)

config_filename = os.path.join(tempdir, C.CONFIG_FILE)

with open(config_filename, 'w') as cfg:

cfg.write(config_s)

output.write_line('=' * 79)

output.write_line('Using config:')

output.write_line('=' * 79)

output.write(config_s)

output.write_line('=' * 79)

return run(config_filename, store, args)

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