Add Gradle build process, fix Async command warnings on PaperSpigot

Author: HeroCC

build.gradle

@@ -0,0 +1,26 @@
+apply plugin: 'java'
+
+//noinspection GroovyUnusedAssignment
+sourceCompatibility = 1.8
+version = '2.5'
+
+repositories {
+  jcenter()
+  maven { url 'https://hub.spigotmc.org/nexus/content/groups/public' }
+  maven { url 'https://oss.sonatype.org/content/repositories/snapshots' }
+}
+
+dependencies {
+  compile 'org.bukkit:bukkit:1.10-R0.1-SNAPSHOT'
+  compile 'net.md-5:bungeecord-api:1.10-SNAPSHOT'
+}
+
+ext {
+  // Placeholders for configuration filtering
+  resourceTokens = [ 'Version': version ];
+}
+
+processResources {
+  include 'plugin.yml', 'config.yml', 'bungee.yml'
+  filter org.apache.tools.ant.filters.ReplaceTokens, tokens: resourceTokens
+}

settings.gradle

@@ -0,0 +1 @@
+rootProject.name = 'CommandSync'

src/main/java/com/fuzzoland/CommandSyncClient/ClientThread.java

@@ -8,6 +8,8 @@
 import java.net.Socket;
 
 import org.bukkit.Bukkit;
+import org.bukkit.command.CommandSender;
+import org.bukkit.entity.Player;
 
 public class ClientThread extends Thread {
 
@@ -60,7 +62,7 @@ public void run() {
 								String[] data = input.split(plugin.spacer);
 								if(data[0].equals("console")) {
 									String command = data[2].replaceAll("\\+", " ");
-									Bukkit.getServer().dispatchCommand(Bukkit.getServer().getConsoleSender(), command);
+									safePerformCommand(Bukkit.getServer().getConsoleSender(), command, plugin);
 									plugin.debugger.debug("Ran command /" + command + ".");
 								}
 							}
@@ -116,4 +118,13 @@ private void connect(Boolean sleep) {
 		    plugin.debugger.debug("Could not connect to the server.");
 		}
 	}
+
+  public static void safePerformCommand(final CommandSender sender, final String command, CSC plugin) {
+    // PaperSpigot will complain about async command execution without this. See http://bit.ly/1oSiM6C
+    if (Bukkit.getServer().isPrimaryThread()){
+      Bukkit.getServer().dispatchCommand(sender, command);
+    } else {
+      Bukkit.getScheduler().runTask(plugin, () -> Bukkit.getServer().dispatchCommand(sender, command)); // This uses lambdas, in Java 8+ only
+    }
+  }
 }

src/main/resources/bungee.yml

@@ -1,4 +1,4 @@
 name: CommandSync
 main: com.fuzzoland.CommandSyncServer.CSS
-version: 2.4
+version: '@Version@'
 author: YoFuzzy3

src/main/resources/plugin.yml

@@ -1,6 +1,6 @@
 name: CommandSync
 main: com.fuzzoland.CommandSyncClient.CSC
-version: 2.4
+version: '@Version@'
 author: YoFuzzy3
 
 commands: