Show git hash when starting the server

.gitignore

@@ -72,4 +72,5 @@ Lunar Core Handbook.txt
 config.json
 *.mv
 *.exe
+BuildConfig.java
 Test.java

build.gradle

@@ -102,6 +102,8 @@ application {
 }
 
 jar {
+	dependsOn 'injectGitHash'
+
 	exclude '*.proto'
 
     manifest {
@@ -145,6 +147,24 @@ eclipse {
     }
 }
 
+tasks.register('injectGitHash') {
+    def gitCommitHash = {
+        try {
+            return 'git rev-parse --verify --short HEAD'.execute().text.trim()
+        } catch (ignored) {
+            return 'GIT_NOT_FOUND'
+        }
+    }
+
+    new File(project.projectDir.getAbsolutePath() + '/src/main/java/emu/lunarcore/BuildConfig.java').text = """
+package emu.lunarcore;
+
+public final class BuildConfig {
+    public static final String GIT_HASH = \"${gitCommitHash()}\";
+}
+"""
+}
+
 task updateProto {
     group 'Build'
     description 'Cleans generated proto folder and regenerates protos'

src/main/java/emu/lunarcore/LunarCore.java

@@ -59,6 +59,7 @@ public class LunarCore {
     public static void main(String[] args) {
         // Start Server
         LunarCore.getLogger().info("Starting Lunar Core...");
+        LunarCore.getLogger().info("Git hash: " + getGitHash());
         LunarCore.getLogger().info("Game version: " + GameConstants.VERSION);
         boolean generateHandbook = true;
         
@@ -168,6 +169,19 @@ public class LunarCore {
             getLogger().error("Config save error");
         }
     }
+    
+    // Git hash
+
+    private static String getGitHash() {
+        // Safely get the build config without errors even if it hasnt been generated yet
+        try {
+            Class<?> buildConfig = Class.forName("emu.lunarcore.BuildConfig");
+            return buildConfig.getField("GIT_HASH").get(null).toString();
+        } catch (Exception e) {
+            // Ignored
+        }
+        return "Unknown";
+    }
 
     // Server console