Include git revision and build number

build.gradle

@@ -27,6 +27,17 @@ allprojects {
                 return os.toString().trim()
             }
         }
+
+        getCurrentShortRevision = {
+            new ByteArrayOutputStream().withStream { os ->
+                exec {
+                    executable = "git"
+                    args = ["rev-parse", "HEAD"]
+                    standardOutput = os
+                }
+                return os.toString().trim().substring(0, 8)
+            }
+        }
     }
 
     repositories {

proxy/build.gradle

@@ -14,8 +14,11 @@ compileTestJava {
 
 jar {
     manifest {
+        def buildNumber = System.getenv("BUILD_NUMBER") ?: "unknown"
+        def version = "${project.version} (git-${project.ext.getCurrentShortRevision()}, build ${buildNumber})"
+
         attributes 'Main-Class': 'com.velocitypowered.proxy.Velocity'
-        attributes 'Implementation-Version': project.version
+        attributes 'Implementation-Version': version
     }
 }