o {fU@sddlmZmZmZeZdgZddlZddlZddl Z ddl Z ddl Z ddl Z ddl mZdZeeur5eneZGdddZdS))absolute_importprint_functionunicode_literals PluginManagerN)Plugin c@sFeZdZdZddZddZeddZdd Zd d Z dd dZ d S)rzFind and load plugins. Plugins are stored in files named '*_plugin.py' in the list of directories given to the constructor. cCs6||_t|trtdt|t||_d|_dS)NzExpected sequence, got {}) _app isinstance STR_TYPES TypeErrorformattypelist _plugin_dirs_plugins)selfapp plugin_dirsr=s z2PluginManager.get_plugin_files..zNo such plugin directory: {}NzPlugin modules in {}: {}) roslistdirOSErrorerrnoENOENTloggingdebugr SPACEjoinsortedpath)rdirname basenameserrorrrrrget_plugin_files8s(     zPluginManager.get_plugin_filesccs|D]}|VqdSN)r))rrrrr plugin_filesKs zPluginManager.plugin_filesc csXdd}ddt||D}td|tdd|D|D]}|Vq#dS) z-Find and instantiate all plugins in a module.cSst|o t|to |tuSr*)inspectisclass issubclassr)targetrrr is_pluginRs z.PluginManager._find_plugins..is_plugincSsg|]\}}|qSrr)rnamememberrrrrWsz/PluginManager._find_plugins..zPlugins in {}: {}css|]}t|VqdSr*)strrpluginrrr \sz.PluginManager._find_plugins..N)r, getmembersr r!r r"r#)rmoduler0plugin_classes plugin_classrrr _find_pluginsPs  zPluginManager._find_pluginsc Cstd|tjtj|\}}|tjvrtj|St |d;}zt |||ddt j f}Wn"t yT}ztd||WYd}~WddSd}~ww|WdS1sawYdS)zLoad a module from a filename.zLoading module from file {}rz.pyzFailed to load plugin '{}' ({})N)r r!r rr%splitextbasenamesysmodulesopenimp load_module PY_SOURCE Exceptionwarning)rr module_nameignorefpr8r(rrr _load_module`s(     $zPluginManager._load_moduleNc sdurg|jdurCg|_t|j}t|}t|D]'\}}|dur)||||||}||D]}||j|j |q3qfdd|jD} t d | | S)aReturn all plugins that have been found. Loaded plugins are cached, so they will only be loaded once. `condition` is matched against each plugin to determine whether it will be returned or not. A `condition` of the string '*' matches all plugins. The default condition matches all default plugins, since by default, plugins have a condition of the empty list. If `condition` matches the plugin's condition exactly, the plugin is returned. The plugin's condition can also be a sequence, and if `condition` is in that sequence, the plugin is returned. Note that even though loaded plugins are cached, calling `get_plugin()` with different a `condition` can return a different set of plugins. If `callback` is specified, it is called after each plugin has been found, with the following arguments: filename, index of filename in list of files to be examined (starting with 0), and total number of files to be examined. The purpose of this is to allow the callback to inform the user in case things take a long time. Ncs,g|]}|jks|jvsdkr|qS)* conditionr4rLrrrs  z-PluginManager.get_plugins..z#plugins for condition '{}' are '{}') rrr+len enumeraterJr;set_applicationrappendr r!r ) rrMcallback filenamestotalirr8r5pluginsrrLr get_pluginss*      zPluginManager.get_plugins)NN) __name__ __module__ __qualname____doc__rr)propertyr+r;rJrWrrrrr's  $) __future__rrrr __metaclass____all__rrBr?rr,r janitor.plugincore.pluginrr"r3bytesr rrrrrs