Move enabled modules list to configuration directory

data/etc/plinth/plinth.config

@@ -5,6 +5,7 @@ box_name = FreedomBox
 [Path]
 # directory locations
 file_root = /usr/share/plinth
+config_dir = /etc/plinth
 data_dir = /var/lib/plinth
 log_dir = /var/log/plinth
 pid_dir = /var/run

plinth.config

@@ -5,6 +5,7 @@ box_name = FreedomBox
 [Path]
 # directory locations
 file_root = %(root)s
+config_dir = %(file_root)s/data/etc/plinth
 data_dir = %(file_root)s/data/var/lib/plinth
 log_dir = %(file_root)s/data/var/log/plinth
 pid_dir = %(file_root)s/data/var/run

plinth/cfg.py

@@ -7,6 +7,7 @@ product_name = None
 box_name = None
 root = None
 file_root = None
+config_dir = None
 data_dir = None
 store_file = None
 actions_dir = None
@@ -48,6 +49,7 @@ def read():
                     ('Name', 'box_name'),
                     ('Path', 'root'),
                     ('Path', 'file_root'),
+                    ('Path', 'config_dir'),
                     ('Path', 'data_dir'),
                     ('Path', 'store_file'),
                     ('Path', 'actions_dir'),

plinth/module_loader.py

@@ -41,8 +41,8 @@ def load_modules():
     pre_module_loading.send_robust(sender="module_loader")
     module_names = []
     modules = {}
-    directory = os.path.dirname(os.path.abspath(__file__))
-    for name in os.listdir(os.path.join(directory, 'modules', 'enabled')):
+    module_directory = os.path.join(cfg.config_dir, 'modules-enabled')
+    for name in os.listdir(module_directory):
         full_name = 'plinth.modules.{module}'.format(module=name)
 
         LOGGER.info('Importing %s', full_name)
@@ -144,7 +144,8 @@ def get_template_directories():
     core_directory = os.path.join(directory, 'templates')
 
     directories = set((core_directory,))
-    for name in os.listdir(os.path.join(directory, 'modules', 'enabled')):
+    module_directory = os.path.join(cfg.config_dir, 'modules-enabled')
+    for name in os.listdir(module_directory):
         directories.add(os.path.join(directory, 'modules', name, 'templates'))
 
     return directories