def install()

in skywalking/plugins/__init__.py [0:0]

• 30 lines of code
• 10 McCabe index (conditional complexity)

def install():
    disable_patterns = config.agent_disable_plugins
    if isinstance(disable_patterns, str):
        disable_patterns = [re.compile(p.strip()) for p in disable_patterns.split(',') if p.strip()]
    else:
        disable_patterns = [re.compile(p.strip()) for p in disable_patterns if p.strip()]
    for importer, modname, _ispkg in pkgutil.iter_modules(skywalking.plugins.__path__):
        if any(pattern.match(modname) for pattern in disable_patterns):
            logger.info("plugin %s is disabled and thus won't be installed", modname)
            continue
        logger.debug('installing plugin %s', modname)
        plugin = importer.find_module(modname).load_module(modname)

        # todo: refactor the version checker, currently it doesn't really work as intended
        supported = pkg_version_check(plugin)
        if not supported:
            logger.debug("check version for plugin %s's corresponding package failed, thus "
                         "won't be installed", modname)
            continue

        if not hasattr(plugin, 'install') or inspect.ismethod(plugin.install):
            logger.warning("no `install` method in plugin %s, thus the plugin won't be installed", modname)
            continue

        # noinspection PyBroadException
        try:
            plugin.install()
            logger.debug('Successfully installed plugin %s', modname)
        except Exception:
            logger.warning(
                'Plugin %s failed to install, please ignore this warning '
                'if the package is not used in your application.',
                modname
            )
            traceback.print_exc() if logger.isEnabledFor(logging.DEBUG) else None