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-rw-r--r--src/plugin_manager.py116
1 files changed, 116 insertions, 0 deletions
diff --git a/src/plugin_manager.py b/src/plugin_manager.py
new file mode 100644
index 00000000..df96e9ab
--- /dev/null
+++ b/src/plugin_manager.py
@@ -0,0 +1,116 @@
+import imp
+import os
+import sys
+from config import config
+from gettext import gettext as _
+
+plugins_dir = config.get('plugins_dir', '')
+plugins_dir = plugins_dir or\
+ os.path.join(os.environ.get('XDG_DATA_HOME') or\
+ os.path.join(os.environ.get('HOME'), '.local', 'share'),
+ 'poezio', 'plugins')
+
+config_home = os.environ.get("XDG_CONFIG_HOME")
+if not config_home:
+ config_home = os.path.join(os.environ.get('HOME'), '.config')
+plugins_conf_dir = os.path.join(config_home, 'poezio', 'plugins')
+
+try:
+ os.makedirs(plugins_dir)
+except OSError:
+ pass
+
+try:
+ os.makedirs(plugins_conf_dir)
+except OSError:
+ pass
+
+sys.path.append(plugins_dir)
+
+class PluginManager(object):
+ def __init__(self, core):
+ self.core = core
+ self.modules = {} # module name -> module object
+ self.plugins = {} # module name -> plugin object
+ self.commands = {} # module name -> dict of commands loaded for the module
+ self.event_handlers = {} # module name -> list of event_name/handler pairs loaded for the module
+
+ def load(self, name):
+ if name in self.plugins:
+ self.unload(name)
+
+ try:
+ if name in self.modules:
+ imp.acquire_lock()
+ module = imp.reload(self.modules[name])
+ imp.release_lock()
+ else:
+ file, filename, info = imp.find_module(name, [plugins_dir])
+ imp.acquire_lock()
+ module = imp.load_module(name, file, filename, info)
+ imp.release_lock()
+ except Exception as e:
+ import traceback
+ self.core.information(_("Could not load plugin: ") + traceback.format_exc(), 'Error')
+ return
+ finally:
+ if imp.lock_held():
+ imp.release_lock()
+
+ self.modules[name] = module
+ self.commands[name] = {}
+ self.event_handlers[name] = []
+ self.plugins[name] = module.Plugin(self, self.core, plugins_conf_dir)
+
+ def unload(self, name):
+ if name in self.plugins:
+ try:
+ for command in self.commands[name].keys():
+ del self.core.commands[command]
+ for event_name, handler in self.event_handlers[name]:
+ self.core.xmpp.del_event_handler(event_name, handler)
+
+ self.plugins[name].unload()
+ del self.plugins[name]
+ del self.commands[name]
+ del self.event_handlers[name]
+ except Exception as e:
+ import traceback
+ self.core.information(_("Could not unload plugin (may not be safe to try again): ") + traceback.format_exc())
+
+ def add_command(self, module_name, name, handler, help, completion=None):
+ if name in self.core.commands:
+ raise Exception(_("Command '%s' already exists") % (name,))
+
+ commands = self.commands[module_name]
+ commands[name] = (handler, help, completion)
+ self.core.commands[name] = (handler, help, completion)
+
+ def add_event_handler(self, module_name, event_name, handler):
+ eh = self.event_handlers[module_name]
+ eh.append((event_name, handler))
+ self.core.xmpp.add_event_handler(event_name, handler)
+
+ def del_event_handler(self, module_name, event_name, handler):
+ self.core.xmpp.del_event_handler(event_name, handler)
+ eh = self.event_handlers[module_name]
+ eh = list(filter(lambda e : e != (event_name, handler), eh))
+
+ def completion_load(self, the_input):
+ """
+ completion function that completes the name of the plugins, from
+ all .py files in plugins_dir
+ """
+ try:
+ names = os.listdir(plugins_dir)
+ except OSError as e:
+ self.core.information(_('Completion failed: %s' % e), 'Error')
+ return
+ plugins_files = [name[:-3] for name in names if name.endswith('.py')]
+ return the_input.auto_completion(plugins_files, '')
+
+ def completion_unload(self, the_input):
+ """
+ completion function that completes the name of the plugins that are loaded
+ """
+ return the_input.auto_completion(list(self.plugins.keys()), '')