utils.py 文件源码

def get_version():
    """Derive Ceph release from an installed package."""
    import apt_pkg as apt

    cache = apt_cache()
    package = "ceph"
    try:
        pkg = cache[package]
    except:
        # the package is unknown to the current apt cache.
        e = 'Could not determine version of package with no installation ' \
            'candidate: %s' % package
        error_out(e)

    if not pkg.current_ver:
        # package is known, but no version is currently installed.
        e = 'Could not determine version of uninstalled package: %s' % package
        error_out(e)

    vers = apt.upstream_version(pkg.current_ver.ver_str)

    # x.y match only for 20XX.X
    # and ignore patch level for other packages
    match = re.match('^(\d+)\.(\d+)', vers)

    if match:
        vers = match.group(0)
    return float(vers)