def load_rev_number()

in bayesmark/cmd_parse.py [0:0]

• 25 lines of code
• 15 McCabe index (conditional complexity)

def load_rev_number():
    # This function uses a lot of language "power features" that could be considered bad form:
    # 1) does a conditional import to get version
    # 2) uses __file__ to try and extract and git repo version during execution
    # We will let this fly anyway because:
    # 1) The results of this are only used for logging anyway
    # 2) This is a command parsing module of the code and inherently very non-pure and doing IO etc
    # 3) Unclear if there is a cleaner way to do this

    # Get rev from version file (if running inside the pip-installable wheel without the git repo)
    try:
        from bayesmark import version

        rev_file = version.VERSION
    except ImportError:
        rev_file = None
    else:
        rev_file = rev_file.strip()
        rev = rev_file

    # Get rev from git API if inside git repo (and not built wheel from pip install ...)
    wdir = os.path.abspath(os.path.join(os.path.dirname(__file__), ".."))
    try:
        repo = git.Repo(path=wdir, search_parent_directories=False)
    except InvalidGitRepositoryError:
        rev_repo = None
    else:
        rev_repo = repo.head.commit.hexsha
        rev_repo = rev_repo.strip()
        rev = rev_repo

    # Check coherence of what we found
    if (rev_repo is None) and (rev_file is None):
        raise RuntimeError("Must specify version.py if not inside a git repo.")
    if (rev_repo is not None) and (rev_file is not None):
        assert rev_repo == rev_file, "Rev file %s does not match rev git %s" % (rev_file, rev_repo)

    assert rev == rev.strip()
    # We could first enforce is_lower_hex if we want to enforce that
    rev = rev[:7]
    return rev