feat: Allow loading of external modules

example/config.yml

@@ -0,0 +1,8 @@
+load_modules:
+  - external_module_test
+
+enabled_modules:
+  - tags
+  - markdown
+  - templating
+  - test

external_module_test/__init__.py

@@ -0,0 +1,8 @@
+from grimoiressg.modules import available_modules
+
+
+def test(data, context):
+    print("This is test module.")
+
+
+available_modules["test"] = test

grimoiressg/config.py

@@ -1,7 +1,7 @@
 import yaml
 from yaml import Loader
 
-from grimoiressg.modules import available_modules
+from grimoiressg.modules import available_modules, load_external_module
 
 
 def default_config():
@@ -21,9 +21,15 @@ def read_config(context):
         print("No config file given; using default config")
         config = default_config()
     else:
+        print("Loading config file...")
         with open(config_file, "r") as file:
             config = yaml.load(file, Loader) or {}
 
+    for module in config.get("load_modules", []):
+        print(f" Loading external module {module}")
+        load_external_module(module)
+    print()
+
     print("Enabled modules:")
     for module in config.get("enabled_modules", []):
         print(f" - {module}")

grimoiressg/modules/__init__.py

@@ -7,3 +7,7 @@ available_modules = {
     "markdown": compile_markdown,
     "templating": render_templates
 }
+
+
+def load_external_module(module):
+    __import__(module)