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# DExTer : Debugging Experience Tester
# ~~~~~~   ~         ~~         ~   ~~
#
# Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
# See https://llvm.org/LICENSE.txt for license information.
# SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
"""DExTer version output."""

import os
from subprocess import CalledProcessError, check_output, STDOUT
import sys

from dex import __version__


def _git_version():
    dir_ = os.path.dirname(__file__)
    try:
        branch = (check_output(
            ['git', 'rev-parse', '--abbrev-ref', 'HEAD'],
            stderr=STDOUT,
            cwd=dir_).rstrip().decode('utf-8'))
        hash_ = check_output(
            ['git', 'rev-parse', 'HEAD'], stderr=STDOUT,
            cwd=dir_).rstrip().decode('utf-8')
        repo = check_output(
            ['git', 'remote', 'get-url', 'origin'], stderr=STDOUT,
            cwd=dir_).rstrip().decode('utf-8')
        return '[{} {}] ({})'.format(branch, hash_, repo)
    except (OSError, CalledProcessError):
        pass
    return None


def version(name):
    lines = []
    lines.append(' '.join(
        [s for s in [name, __version__, _git_version()] if s]))
    lines.append('  using Python {}'.format(sys.version))
    return '\n'.join(lines)
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