Added DLC_SPACE_AGE environment variable (#519)

* Added DLC_SPACE_AGE environment variable to enable or disable dlc related mods

Took 53 minutes

* 🎨

Took 2 minutes

docker/files/docker-dlc.sh

@@ -0,0 +1,38 @@
+#!/bin/bash
+set -eou pipefail
+
+# Path to the mod-list.json file
+MOD_LIST_FILE="$MODS/mod-list.json"
+
+enable_mod()
+{
+  echo "Enable mod $1 for DLC"
+  jq --arg mod_name "$1" 'if .mods | map(.name) | index($mod_name) then .mods |= map(if .name == $mod_name and .enabled == false then .enabled = true else . end) else . end' "$MOD_LIST_FILE" > "$MOD_LIST_FILE.tmp"
+  mv "$MOD_LIST_FILE.tmp" "$MOD_LIST_FILE"
+}
+
+disable_mod()
+{
+  echo "Disable mod $1 for DLC"
+  jq --arg mod_name "$1" 'if .mods | map(.name) | index($mod_name) then .mods |= map(if .name == $mod_name and .enabled == true then .enabled = false else . end) else .mods += [{"name": $mod_name, "enabled": false}] end' "$MOD_LIST_FILE" > "$MOD_LIST_FILE.tmp"
+  mv "$MOD_LIST_FILE.tmp" "$MOD_LIST_FILE"
+}
+
+# Enable or disable DLCs if configured
+if [[ ${DLC_SPACE_AGE:-} == "true" ]]; then
+  # Define the DLC mods
+  DLC_MODS=("elevated-rails" "quality" "space-age")
+
+  # Iterate over each DLC mod
+  for MOD in "${DLC_MODS[@]}"; do
+    enable_mod "$MOD"
+  done
+else
+  # Define the DLC mods
+  DLC_MODS=("elevated-rails" "quality" "space-age")
+
+  # Iterate over each DLC mod
+  for MOD in "${DLC_MODS[@]}"; do
+    disable_mod "$MOD"
+  done
+fi

docker/files/docker-entrypoint.sh

@@ -43,6 +43,8 @@ if [[ ${UPDATE_MODS_ON_START:-} == "true" ]]; then
   ./docker-update-mods.sh
 fi
 
+./docker-dlc.sh
+
 EXEC=""
 if [[ $(id -u) = 0 ]]; then
   # Update the User and Group ID based on the PUID/PGID variables