From e034eba8271f475150a5da1713e36bd35a21fc26 Mon Sep 17 00:00:00 2001
From: Matthias Dellweg <mdellweg@redhat.com>
Date: Tue, 27 Feb 2024 13:19:15 +0100
Subject: [PATCH] Allow selecting enabled plugins

fixes TBA
---
 CHANGES/+select_plugins.feature      |  1 +
 pulpcore/app/settings.py             | 43 +++++++++++++++++++---------
 staging_docs/admin/learn/settings.md |  5 ++++
 3 files changed, 36 insertions(+), 13 deletions(-)
 create mode 100644 CHANGES/+select_plugins.feature

diff --git a/CHANGES/+select_plugins.feature b/CHANGES/+select_plugins.feature
new file mode 100644
index 0000000000..ca6e2f966f
--- /dev/null
+++ b/CHANGES/+select_plugins.feature
@@ -0,0 +1 @@
+Added ``ENABLED_PLUGINS`` option to allow selecting installed plugins to be enabled.
diff --git a/pulpcore/app/settings.py b/pulpcore/app/settings.py
index 23026460cc..9a58dbc69a 100644
--- a/pulpcore/app/settings.py
+++ b/pulpcore/app/settings.py
@@ -12,9 +12,10 @@
 
 from contextlib import suppress
 from importlib import import_module
+from importlib.metadata import entry_points
+from pkg_resources import iter_entry_points
 from logging import getLogger
 from pathlib import Path
-from pkg_resources import iter_entry_points
 
 from cryptography.fernet import Fernet
 from django.core.exceptions import ImproperlyConfigured
@@ -81,14 +82,6 @@
     "pulpcore.app",
 ]
 
-# Enumerate the installed Pulp plugins during the loading process for use in the status API
-INSTALLED_PULP_PLUGINS = []
-
-for entry_point in iter_entry_points("pulpcore.plugin"):
-    plugin_app_config = entry_point.load()
-    INSTALLED_PULP_PLUGINS.append(entry_point.module_name)
-    INSTALLED_APPS.append(plugin_app_config)
-
 # Optional apps that help with development, or augment Pulp in some non-critical way
 OPTIONAL_APPS = [
     "crispy_forms",
@@ -314,7 +307,7 @@
 
 # HERE STARTS DYNACONF EXTENSION LOAD (Keep at the very bottom of settings.py)
 # Read more at https://dynaconf.readthedocs.io/en/latest/guides/django.html
-from dynaconf import DjangoDynaconf, Validator  # noqa
+from dynaconf import DjangoDynaconf, Dynaconf, Validator  # noqa
 
 # Validators
 content_origin_validator = Validator(
@@ -380,14 +373,38 @@
 )
 
 
+def load_plugin_config_hook(settings):
+    # Enumerate the installed Pulp plugins during the loading process for use in the status API
+    ENABLED_PLUGINS = getattr(settings, "ENABLED_PLUGINS", None)
+    installed_plugins = []
+    installed_plugin_apps = []
+
+    for entry_point in entry_points()["pulpcore.plugin"]:
+        if ENABLED_PLUGINS is not None and entry_point.name not in ENABLED_PLUGINS:
+            continue
+        installed_plugins.append(entry_point.module)
+        installed_plugin_apps.append(entry_point.load())
+
+    plugin_settings = Dynaconf(
+        PRELOAD_FOR_DYNACONF=[
+            f"{module}.app.settings" for module in installed_plugins
+        ]
+    )
+
+    data = {"dynaconf_merge": True}
+    data.update(plugin_settings.as_dict())
+    data.update(settings.as_dict())
+    data["INSTALLED_APPS"].extend(installed_plugin_apps)
+    data["INSTALLED_APPS"].append("dynaconf_merge_unique")
+    return data
+
+
 settings = DjangoDynaconf(
     __name__,
     ENVVAR_PREFIX_FOR_DYNACONF="PULP",
     ENV_SWITCHER_FOR_DYNACONF="PULP_ENV",
-    PRELOAD_FOR_DYNACONF=[
-        "{}.app.settings".format(plugin_name) for plugin_name in INSTALLED_PULP_PLUGINS
-    ],
     ENVVAR_FOR_DYNACONF="PULP_SETTINGS",
+    post_hooks=(load_plugin_config_hook,),
     load_dotenv=False,
     validators=[
         api_root_validator,
diff --git a/staging_docs/admin/learn/settings.md b/staging_docs/admin/learn/settings.md
index 84efeae6eb..8562593672 100644
--- a/staging_docs/admin/learn/settings.md
+++ b/staging_docs/admin/learn/settings.md
@@ -157,6 +157,11 @@ The password for Redis.
 Pulp defines the following settings itself:
 
 
+### ENABLED_PLUGINS
+
+An optional list of plugin names.
+If provided, Pulp will limit loading plugins to this list.
+If omitted, Pulp will load all installed plugins.
 
 ### API_ROOT