OpenStack Study: version.py

**** CubicPower OpenStack Study ****

def _load_config():

    # Don't load in global context, since we can't assume

    # these modules are accessible when distutils uses

    # this module

    import ConfigParser

    from oslo.config import cfg

    from nova.openstack.common import log as logging

    global loaded, NOVA_VENDOR, NOVA_PRODUCT, NOVA_PACKAGE

    if loaded:

        return

    loaded = True

    cfgfile = cfg.CONF.find_file("release")

    if cfgfile is None:

        return

    try:

        cfg = ConfigParser.RawConfigParser()

        cfg.read(cfgfile)

        NOVA_VENDOR = cfg.get("Nova", "vendor")

        if cfg.has_option("Nova", "vendor"):

            NOVA_VENDOR = cfg.get("Nova", "vendor")

        NOVA_PRODUCT = cfg.get("Nova", "product")

        if cfg.has_option("Nova", "product"):

            NOVA_PRODUCT = cfg.get("Nova", "product")

        NOVA_PACKAGE = cfg.get("Nova", "package")

        if cfg.has_option("Nova", "package"):

            NOVA_PACKAGE = cfg.get("Nova", "package")

    except Exception as ex:

        LOG = logging.getLogger(__name__)

        LOG.error(_("Failed to load %(cfgfile)s: %(ex)s"),

                  {'cfgfile': cfgfile, 'ex': ex})

**** CubicPower OpenStack Study ****

def vendor_string():

    _load_config()

    return NOVA_VENDOR

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def product_string():

    _load_config()

    return NOVA_PRODUCT

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def package_string():

    _load_config()

    return NOVA_PACKAGE

**** CubicPower OpenStack Study ****

def version_string_with_package():

    if package_string() is None:

        return version_info.version_string()

    else:

        return "%s-%s" % (version_info.version_string(), package_string())