Add via version management

configure.sh

@@ -4,15 +4,28 @@
 STANDALONE_PORT=25565
 # port of the server in proxy mode, aka the internal port
 PROXY_PORT=25566
+# installs ViaVersion on BungeeCord and standalone mode, removes it in Velocity mode
+MANAGE_VIA_VERSION=true
+# installs ViaBackwards on BungeeCord and standalone mode, removes it in Velocity mode
+MANAGE_VIA_BACKWARDS=$MANAGE_VIA_VERSION
+
+# Prefix of the ViaVersion jar
+VIA_VERSION_NAME="ViaVersion"
+# Prefix of the ViaBackwards jar
+VIA_BACKWARDS_NAME="ViaBackwards"
+# Github repo of ViaVersion project
+VIA_VERSION_REPO="ViaVersion/ViaVersion"
+# Github repo of ViaBackwards project
+VIA_BACKWARDS_REPO="ViaVersion/ViaBackwards"
 
 function main {
 
   # parse arguments
-  velocity=false
+  local velocity=false
-  bungeecord=false
+  local bungeecord=false
-  standalone=false
+  local standalone=false
-  fetch=false
+  local fetch=false
-  help=false
+  local help=false
 
   for arg in "$@"; do
     case "$arg" in
@@ -78,21 +91,45 @@ function main {
   fi
 
   # Do the actual configuration
+
+  # Velocity
   if $velocity; then
     enable_online_mode false
     set_port "$PROXY_PORT"
     enable_velocity true
     enable_bungeecord false
+    if $MANAGE_VIA_VERSION; then
+      remove_plugin "$VIA_VERSION_NAME"
+    fi
+    if $MANAGE_VIA_BACKWARDS; then
+      remove_plugin "$VIA_BACKWARDS_NAME"
+    fi
+
+  # BungeeCord
   elif $bungeecord; then
     enable_online_mode false
     set_port "$PROXY_PORT"
     enable_velocity false
     enable_bungeecord true
+    if $MANAGE_VIA_VERSION; then
+      update_plugin "$VIA_VERSION_NAME" "$VIA_VERSION_REPO"
+    fi
+    if $MANAGE_VIA_BACKWARDS; then
+      update_plugin "$VIA_BACKWARDS_NAME" "$VIA_BACKWARDS_REPO"
+    fi
+
+  # standalone
   elif $standalone; then
     enable_online_mode true
     set_port "$STANDALONE_PORT"
     enable_velocity false
     enable_bungeecord false
+    if $MANAGE_VIA_VERSION; then
+      update_plugin "$VIA_VERSION_NAME" "$VIA_VERSION_REPO"
+    fi
+    if $MANAGE_VIA_BACKWARDS; then
+      update_plugin "$VIA_BACKWARDS_NAME" "$VIA_BACKWARDS_REPO"
+    fi
   fi
 }
 
@@ -125,4 +162,32 @@ function enable_bungeecord {
   yq -iy ".settings.bungeecord = $1" spigot.yml
 }
 
+# Removes a plugin
+#
+# Usage: remove_plugin <jar-prefix>
+function remove_plugin {
+  local plugin_name=$1
+  rm plugins/"$plugin_name"*.jar 2>/dev/null
+}
+
+# Update the latest release of a plugin from github
+#
+# Usage: update_plugin <jar-prefix> <repo>
+function update_plugin {
+  local plugin_name=$1
+  local repo=$2
+  remove_plugin $plugin_name
+  download_jar_from_github $repo "plugins/"
+}
+
+# Download the jar files from the latest release of a github repo
+#
+# Usage: download_jar_from_github <repo> <destination>
+function download_jar_from_github {
+  local repo=$1
+  local dst=$2
+  local url=$(curl -s "https://api.github.com/repos/$repo/releases/latest" | jq -r '.assets[] | select(.name | endswith(".jar")) | .browser_download_url')
+  wget -qP "$dst" "$url"
+}
+
 main "$@"