adding update mod check on mod script to avoid it always updating mods

Author: SQLJames

CHANGELOG.md

@@ -5,6 +5,7 @@
 #### Non-Breaking Changes
 
 - Fixing mod download script to encode spaces properly, fixes [Issue 42](https://github.com/SQLJames/factorio-server-charts/issues/42)
+- Adding update mod check on mod script to avoid it always updating mods, fixes part of[Issue 45](https://github.com/SQLJames/factorio-server-charts/issues/45)
 
 ### V2.2.0
 

charts/factorio-server-charts/templates/deployment.yaml

@@ -97,6 +97,9 @@ spec:
           securityContext:
             {{- toYaml . | nindent 12 }}
           {{- end }}
+          env:
+          - name: UPDATE_MODS_ON_START
+            value: {{ .Values.factorioServer.update_mods_on_start | quote }}
           volumeMounts:
             - name: datadir
               mountPath: /factorio

charts/factorio-server-charts/templates/mod-downloader-configmap.yaml

@@ -11,6 +11,13 @@ data:
   # credit to the factoriotools/factorio-docker team, most of this logic came from them
   # https://github.com/factoriotools/factorio-docker/blob/master/docker/files/update-mods.sh
   mod-downloader.sh: |
+    FLAG_FILE="/factorio/mods/.mod_update_complete"
+
+    # Check if flag file exists and UPDATE_MODS_ON_START is not true
+    if [[ -f "$FLAG_FILE" && "${UPDATE_MODS_ON_START}" != "true" ]]; then
+        echo "Mod update already completed previously. Skipping."
+        exit 0
+    fi
     modDir=/factorio/mods
     MOD_BASE_URL="https://mods.factorio.com"
     declare -a officialMods
@@ -109,7 +116,9 @@ data:
         done
       fi
     fi
-
+    # Mark the update as complete by creating the flag file
+    touch "$FLAG_FILE"
+    echo "Mod update completed."