configurable ephemeral mode (#23)

Author: mignaulo

config.yaml

@@ -18,10 +18,12 @@ options:
   mqtt_push: false
   mqtt_frequency: 5
   mqtt_debug: false
+  ephemeral_mode: false
 schema:
   mqtt_push: bool
   mqtt_frequency: int(1,120)
   mqtt_debug: bool
+  ephemeral_mode: bool
   mqtt_host: str?
   mqtt_port: port?
   mqtt_user: str?

docker/entrypoint.sh

@@ -7,6 +7,19 @@ date
 
 # Start MQTT publishing in the background
 CONFIG_PATH=/data/options.json
+if [ -n "$ORB_EPHEMERAL_MODE" ]; then
+  echo "Using ORB_EPHEMERAL_MODE from environment variables"
+else
+  EPHEMERAL_MODE=$(jq -r '.ephemeral_mode // false' "$CONFIG_PATH")
+  if [ "$EPHEMERAL_MODE" = "true" ]; then
+    ORB_EPHEMERAL_MODE="1"
+    export ORB_EPHEMERAL_MODE
+    echo "ORB_EPHEMERAL_MODE is enabled"
+  else
+    echo "ORB_EPHEMERAL_MODE is disabled"
+  fi
+fi
+
 if [ -n "$MQTT_PUSH" ]; then
   echo "Using MQTT_PUSH from environment variables"
 else

translations/en.yaml

@@ -13,6 +13,12 @@ configuration:
     name: Enable Debug Logging
     description: >-
       If set to `true`, debug logging will be enabled for MQTT operations.
+  ephemeral_mode:
+    name: Ephemeral Mode
+    description: >-
+      If set to `true`, Orb will avoid writing runtime data to disk. Enable
+      this for flash-based devices where reducing write cycles matters; data
+      will not persist across restarts.
   mqtt_host:
     name: MQTT Host
     description: >-