Add support for additional configuration options in config.json

Author: zuedev

README.md

@@ -56,6 +56,10 @@ The following environment variables can be used to configure the Hytale server:
 | `HYTALE_SERVER_PORT`           | `5520`               | Port the server binds to                    |
 | `HYTALE_PARAMETERS`            | _(see below)_        | Override all JVM/server parameters          |
 | `HYTALE_ADDITIONAL_PARAMETERS` | _(none)_             | Append additional parameters to the default |
+| `HYTALE_SERVER_NAME`           | _(none)_             | Override `ServerName` in `config.json`      |
+| `HYTALE_MOTD`                  | _(none)_             | Override `MOTD` in `config.json`            |
+| `HYTALE_PASSWORD`              | _(none)_             | Override `Password` in `config.json`        |
+| `HYTALE_MAX_PLAYERS`           | _(none)_             | Override `MaxPlayers` in `config.json`      |
 | `HYTALE_MAX_VIEW_RADIUS`       | _(none)_             | Override `MaxViewRadius` in `config.json`   |
 
 ### Example with Custom Memory Settings

entrypoint.sh

@@ -42,5 +42,21 @@ if [ -f /app/Hytale/config.json ] && [ -n "$HYTALE_MAX_VIEW_RADIUS" ]; then
     sed -i "s/\"MaxViewRadius\"[[:space:]]*:[[:space:]]*[0-9.]\+/\"MaxViewRadius\": $HYTALE_MAX_VIEW_RADIUS/" /app/Hytale/config.json
 fi
 
+if [ -f /app/Hytale/config.json ] && [ -n "$HYTALE_SERVER_NAME" ]; then
+    sed -i "s/\"ServerName\"[[:space:]]*:[[:space:]]*\"[^\"]*\"/\"ServerName\": \"$HYTALE_SERVER_NAME\"/" /app/Hytale/config.json
+fi
+
+if [ -f /app/Hytale/config.json ] && [ -n "$HYTALE_MOTD" ]; then
+    sed -i "s/\"MOTD\"[[:space:]]*:[[:space:]]*\"[^\"]*\"/\"MOTD\": \"$HYTALE_MOTD\"/" /app/Hytale/config.json
+fi
+
+if [ -f /app/Hytale/config.json ] && [ -n "$HYTALE_PASSWORD" ]; then
+    sed -i "s/\"Password\"[[:space:]]*:[[:space:]]*\"[^\"]*\"/\"Password\": \"$HYTALE_PASSWORD\"/" /app/Hytale/config.json
+fi
+
+if [ -f /app/Hytale/config.json ] && [ -n "$HYTALE_MAX_PLAYERS" ]; then
+    sed -i "s/\"MaxPlayers\"[[:space:]]*:[[:space:]]*[0-9]\+/\"MaxPlayers\": $HYTALE_MAX_PLAYERS/" /app/Hytale/config.json
+fi
+
 # Start the Hytale server
 exec java $HYTALE_PARAMETERS