# Copyright (C) The Arvados Authors. All rights reserved.
#
# SPDX-License-Identifier: Apache-2.0

import subprocess
import time
import os
import re

def git_version_at_commit():
    curdir = os.path.dirname(os.path.abspath(__file__))
    myhash = subprocess.check_output(['git', 'log', '-n1', '--first-parent',
                                       '--format=%H', curdir]).strip()
    myversion = subprocess.check_output([curdir+'/../../build/version-at-commit.sh', myhash]).strip().decode()
    return myversion

def save_version(setup_dir, module, v):
  with open(os.path.join(setup_dir, module, "_version.py"), 'wt') as fp:
      return fp.write("__version__ = '%s'\n" % v)

def read_version(setup_dir, module):
  with open(os.path.join(setup_dir, module, "_version.py"), 'rt') as fp:
      return re.match("__version__ = '(.*)'$", fp.read()).groups()[0]

def get_version(setup_dir, module):
    env_version = os.environ.get("ARVADOS_BUILDING_VERSION")

    if env_version:
        save_version(setup_dir, module, env_version)
    else:
        try:
            save_version(setup_dir, module, git_version_at_commit())
        except (subprocess.CalledProcessError, OSError):
            pass

    return read_version(setup_dir, module)