add plugins module to handle plugins in configuration file

Signed-off-by: Andreas Schmidt <mail@schmidt-andreas.de>

dotbot/cli.py

@@ -56,7 +56,7 @@ def main():
             log.use_color(False)
         plugin_directories = list(options.plugin_dirs)
         if not options.disable_built_in_plugins:
-            from .plugins import Clean, Link, Shell
+            from .plugins import Clean, Link, Shell, Plugins
         plugin_paths = []
         for directory in plugin_directories:
           for plugin_path in glob.glob(os.path.join(directory, '*.py')):

dotbot/dispatcher.py

@@ -29,6 +29,10 @@ class Dispatcher(object):
                     if plugin.can_handle(action):
                         try:
                             success &= plugin.handle(action, task[action])
+                            if action == 'plugins':
+                                self._load_plugins()
+                                self._log.lowinfo('Plugin list have been update')
+                                self._log.info('New plugin list: %s' % [type(plugin).__name__ for plugin in self._plugins])
                             handled = True
                         except Exception as err:
                             self._log.error(

dotbot/plugins/__init__.py

@@ -1,3 +1,4 @@
 from .clean import Clean
 from .link import Link
 from .shell import Shell
+from .plugins import Plugins

dotbot/plugins/plugins.py

@@ -0,0 +1,37 @@
+import os
+import glob
+import dotbot
+from ..util import module
+
+class Plugins(dotbot.Plugin):
+    '''
+    Plugins configuration
+    '''
+
+    _directive = 'plugins'
+
+    def can_handle(self, directive):
+        return directive == self._directive
+
+    def handle(self, directive, data):
+        if directive != self._directive:
+            raise ValueError('Plugins cannot handle directive %s' % directive)
+        return self._process_plugins(data)
+
+    def _process_plugins(self, plugins):
+        plugin_dirs = []
+        plugin_paths = []
+        for plugin in plugins:
+            if isinstance(plugin, dict):
+                plugin_dirs.append(plugin.get('dir', ''))
+            else:
+                plugin_paths.append(plugin)
+        for directory in plugin_dirs:
+            for plugin_path in glob.glob(os.path.join(directory, '*.py')):
+                plugin_paths.append(plugin_path)
+        for plugin in plugin_paths:
+            abspath = os.path.abspath(plugin)
+            module.load(abspath)
+        return True
+
+# vim: ts=4 sw=4 et