enable templates for plugins

InvenTree/InvenTree/settings.py

@@ -320,7 +320,6 @@ TEMPLATES = [
             os.path.join(MEDIA_ROOT, 'report'),
             os.path.join(MEDIA_ROOT, 'label'),
         ],
-        'APP_DIRS': True,
         'OPTIONS': {
             'context_processors': [
                 'django.template.context_processors.debug',
@@ -333,6 +332,13 @@ TEMPLATES = [
                 'InvenTree.context.status_codes',
                 'InvenTree.context.user_roles',
             ],
+            'loaders': [(
+                'django.template.loaders.cached.Loader', [
+                    'django.template.loaders.app_directories.Loader',
+                    'django.template.loaders.filesystem.Loader',
+                    'plugins.loader.PluginTemplateLoader',
+                ])
+            ],
         },
     },
 ]

InvenTree/plugins/integration.py

@@ -214,6 +214,8 @@ class IntegrationPlugin(MixinBase, plugin.InvenTreePlugin):
     def __init__(self):
         super().__init__()
         self.add_mixin('base')
+        self.def_path = inspect.getfile(self.__class__)
+        self.path = os.path.dirname(self.def_path)
 
         self.set_sign_values()
 
@@ -230,8 +232,7 @@ class IntegrationPlugin(MixinBase, plugin.InvenTreePlugin):
 
     def get_plugin_commit(self):
         """get last git commit for plugin"""
-        path = inspect.getfile(self.__class__)
-        return get_git_log(path)
+        return get_git_log(self.def_path)
 
     def set_sign_values(self):
         """add the last commit of the plugins class file into plugins context"""

InvenTree/plugins/loader.py

@@ -0,0 +1,19 @@
+"""
+load templates for loaded plugins
+"""
+from django.conf import settings
+
+from django.template.loaders.filesystem import Loader as FilesystemLoader
+from pathlib import Path
+
+
+class PluginTemplateLoader(FilesystemLoader):
+
+    def get_dirs(self):
+        dirname = 'templates'
+        template_dirs = []
+        for plugin in settings.INTEGRATION_PLUGINS:
+            new_path = Path(plugin.path) / dirname
+            if Path(new_path).is_dir():
+                template_dirs.append(new_path)
+        return tuple(template_dirs)