added an experimental parameter

README.md

@@ -30,6 +30,7 @@ These three `.sh` files were created for Infern009's Factorio server, and use [B
   - `cp config.sh.example config.sh`
 - Modify the parameters in `config.sh`.
   - `save_name` - This parameter controls the name of the save file this script will use to start the server.
+  - `experimental` - This parameter controls if the script will download the latest build or the experimental build of the game. See the [Factorio download page](https://www.factorio.com/download) for more information.
   - If you have modified any default config files except for the `config.ini`, you'll want to change the commands' parameters to match those files. I'll assume you're storing them in the `./data` directory. You can find more arguments on the [Factorio Wiki](https://wiki.factorio.com/Command_line_parameters).
     - `extra_params_create=""` - This parameter adds additional flags to the `--create` command the script runs if a save matching `save_name` is not found.
       - `--map-gen-settings ./data/map-gen-settings.json`

config.sh.example

@@ -2,6 +2,8 @@
 
 save_name="default"  # Set this to the name of your save file.
 
+experimental="false" # This decides whether or not to download the experimental/latest build of the game, or the stable version.
+
 # Don't change this unless you know what you're doing.
 # Set this to the custom parameters you want the --create command to use.
 extra_params_create=""

start_server.sh

@@ -18,6 +18,7 @@ fi
 # If config.sh exists, fetch variables from it
 if [ -f "config.sh" ]; then
     source config.sh
+    configpath="config.sh"
     echo "Loaded configuration from config.sh"
 else
     # If config.sh doesn't exist, check if config.sh.example exists
@@ -25,6 +26,7 @@ else
         # Fetch variables from config.sh.example
         echo "WARNING: config.sh file does not exist, falling back on default configuration."
         source config.sh.example
+        configpath="config.sh.example"
         echo "Loaded configuration from config.sh.example"
     else
         # Handle the scenario when both files are missing
@@ -35,7 +37,14 @@ fi
 
 # This handles automatically updating the Factorio binary.
 echo "Fetching Factorio binary..."
-wget https://factorio.com/get-download/stable/headless/linux64 -O factorio_headless.tar.xz
+if [ "$experimental" = "true" ]; then
+    wget https://factorio.com/get-download/latest/headless/linux64 -O factorio_headless.tar.xz
+elif [ "$experimental" = "false" ]; then
+    wget https://factorio.com/get-download/stable/headless/linux64 -O factorio_headless.tar.xz
+else
+    echo "FATAL: ${configpath} file is misconfigured! Experimental variable is not set correctly. Must be 'true' or 'false'."
+    exit 1
+fi
 echo "Extracting Factorio binary..."
 tar -xvf factorio_headless.tar.xz --strip-components=1 --overwrite
 echo "Factorio binary updated!"