Added generated version constant for 'version' command

build.gradle

@@ -1,10 +1,13 @@
 plugins {
     id 'java'
     id 'com.github.johnrengelman.shadow' version '7.1.2'
+    id 'com.github.gmazzo.buildconfig' version '3.1.0'
 }
 
+//def limboVersion = '1.6'
+
 group 'ru.nanit'
-version '1.5.2'
+version '1.6'
 
 compileJava {
     options.encoding = "UTF-8"
@@ -29,6 +32,13 @@ dependencies {
     implementation 'com.grack:nanojson:1.8'
 }
 
+buildConfig {
+    className("BuildConfig")   // forces the class name. Defaults to 'BuildConfig'
+    packageName("ua.nanit.limbo")
+
+    buildConfigField('String', 'LIMBO_VERSION', "\"${project.version}\"")
+}
+
 shadowJar {
     from 'LICENSE'
 

src/main/java/ua/nanit/limbo/server/CommandManager.java

@@ -1,9 +1,6 @@
 package ua.nanit.limbo.server;
 
-import ua.nanit.limbo.server.commands.CmdConn;
-import ua.nanit.limbo.server.commands.CmdHelp;
-import ua.nanit.limbo.server.commands.CmdMem;
-import ua.nanit.limbo.server.commands.CmdStop;
+import ua.nanit.limbo.server.commands.*;
 
 import java.util.*;
 
@@ -19,8 +16,10 @@ public final class CommandManager extends Thread {
         return commands.get(name.toLowerCase());
     }
 
-    public void register(String name, Command cmd) {
-        commands.put(name.toLowerCase(), cmd);
+    public void register(Command cmd, String... aliases) {
+        for (String alias : aliases) {
+            commands.put(alias.toLowerCase(), cmd);
+        }
     }
 
     @Override
@@ -51,9 +50,10 @@ public final class CommandManager extends Thread {
     }
 
     public void registerAll(LimboServer server) {
-        register("help", new CmdHelp(server));
-        register("conn", new CmdConn(server));
-        register("mem", new CmdMem());
-        register("stop", new CmdStop());
+        register(new CmdHelp(server), "help");
+        register(new CmdConn(server), "conn");
+        register(new CmdMem(), "mem");
+        register(new CmdStop(), "stop");
+        register(new CmdVersion(), "version", "ver");
     }
 }

src/main/java/ua/nanit/limbo/server/commands/CmdVersion.java

@@ -0,0 +1,18 @@
+package ua.nanit.limbo.server.commands;
+
+import ua.nanit.limbo.server.Command;
+import ua.nanit.limbo.server.Logger;
+import ua.nanit.limbo.BuildConfig;
+
+public class CmdVersion implements Command {
+
+    @Override
+    public void execute() {
+        Logger.info("Version: %s", BuildConfig.LIMBO_VERSION);
+    }
+
+    @Override
+    public String description() {
+        return "Display limbo version";
+    }
+}