Allow plugins to be enabled, disabled, and applied via env vars.

kolibri/plugins/__init__.py

@@ -39,6 +39,24 @@ def __init__(self):
                 )
         self.save()
         logger.info("Initialized plugins.json")
+        if self.ENV_VAR_APPLIED_PLUGINS:
+            logger.info(
+                "Applied plugins from environment variable: {}".format(
+                    self.ENV_VAR_APPLIED_PLUGINS
+                )
+            )
+        if self.ENV_VAR_ENABLED_PLUGINS:
+            logger.info(
+                "Enabled plugins from environment variable: {}".format(
+                    self.ENV_VAR_ENABLED_PLUGINS
+                )
+            )
+        if self.ENV_VAR_DISABLED_PLUGINS:
+            logger.info(
+                "Disabled plugins from environment variable: {}".format(
+                    self.ENV_VAR_DISABLED_PLUGINS
+                )
+            )
 
     def set_defaults(self):
         self.update(
@@ -55,9 +73,40 @@ def set_defaults(self):
             }
         )
 
+    @property
+    def ENV_VAR_APPLIED_PLUGINS(self):
+        return [
+            p.strip()
+            for p in os.environ.get("KOLIBRI_PLUGIN_APPLY", "").split(",")
+            if p.strip()
+        ]
+
+    @property
+    def ENV_VAR_ENABLED_PLUGINS(self):
+        return set(
+            p.strip()
+            for p in os.environ.get("KOLIBRI_PLUGIN_ENABLE", "").split(",")
+            if p.strip()
+        )
+
+    @property
+    def ENV_VAR_DISABLED_PLUGINS(self):
+        return set(
+            p.strip()
+            for p in os.environ.get("KOLIBRI_PLUGIN_DISABLE", "").split(",")
+            if p.strip()
+        )
+
     @property
     def ACTIVE_PLUGINS(self):
-        return list(self["INSTALLED_PLUGINS"] - self["DISABLED_PLUGINS"])
+        if self.ENV_VAR_APPLIED_PLUGINS:
+            return self.ENV_VAR_APPLIED_PLUGINS
+        return list(
+            (self["INSTALLED_PLUGINS"] - self["DISABLED_PLUGINS"]).union(
+                self.ENV_VAR_ENABLED_PLUGINS
+            )
+            - self.ENV_VAR_DISABLED_PLUGINS
+        )
 
     def update(self, new_values):
         """

kolibri/utils/env.py

@@ -48,6 +48,24 @@ def settings_module():
             See the sd_notify(3) man page for more details.
         """,
     },
+    "KOLIBRI_PLUGIN_APPLY": {
+        "description": """
+            A comma-separated list of plugins to apply. If this variable is set,
+            only the specified plugins will be applied.
+        """,
+    },
+    "KOLIBRI_PLUGIN_ENABLE": {
+        "description": """
+            A comma-separated list of plugins to enable. If this variable is set,
+            the specified plugins will be enabled, overriding plugins disabled via the CLI.
+        """,
+    },
+    "KOLIBRI_PLUGIN_DISABLE": {
+        "description": """
+            A comma-separated list of plugins to disable. If this variable is set,
+            the specified plugins will be disabled, overriding plugins enabled via the CLI.
+        """,
+    },
 }