Use Gradle Kotlin DSL

minecraft/libraries/log4j-patch/build.gradle

@@ -1,52 +0,0 @@
-version '1.0'
-
-sourceSets.create("agent") {
-    java {
-        srcDir 'src/main/agent'
-    }
-}
-
-dependencies {
-    compileOnly group: 'org.apache.logging.log4j', name: 'log4j-core', version: '2.0-beta9'
-}
-
-tasks.withType(JavaCompile) {
-    sourceCompatibility = 8
-    targetCompatibility = 8
-
-    doLast {
-        FileTree tree = fileTree('build/classes/java')
-        tree.include '**/*.class'
-        tree.each {
-            RandomAccessFile rf = new RandomAccessFile(it, "rw")
-            rf.seek(7)   // major version
-            rf.write(50) // java 6
-            rf.close()
-        }
-    }
-}
-
-task agentJar(type: Jar) {
-    dependsOn(tasks.compileJava)
-
-    baseName = 'log4j-patch-agent'
-
-    manifest {
-        attributes 'Premain-Class': 'org.glavo.log4j.patch.agent.Log4jAgent'
-    }
-
-    from(sourceSets.agent.output)
-    from(sourceSets.main.output) {
-        includeEmptyDirs = false
-
-        eachFile {
-            it.path = "org/glavo/log4j/patch/agent/${it.name}.bin"
-        }
-    }
-}
-
-tasks.jar {
-    enabled = false
-    dependsOn agentJar
-}
-

minecraft/libraries/log4j-patch/build.gradle.kts

@@ -0,0 +1,53 @@
+import java.io.RandomAccessFile
+
+version = "1.0"
+
+sourceSets.create("agent") {
+    java {
+        srcDir("src/main/agent")
+    }
+}
+
+dependencies {
+    compileOnly("org.apache.logging.log4j:log4j-core:2.0-beta9")
+}
+
+tasks.withType<JavaCompile> {
+    sourceCompatibility = "1.8"
+    targetCompatibility = "1.8"
+
+    doLast {
+        val tree = fileTree(destinationDirectory)
+        tree.include("**/*.class")
+        tree.exclude("module-info.class")
+        tree.forEach {
+            RandomAccessFile(it, "rw").use { rf ->
+                rf.seek(7)   // major version
+                rf.write(50)   // java 6
+                rf.close()
+            }
+        }
+    }
+}
+
+val agentJar = tasks.create<Jar>("agentJar") {
+    dependsOn(tasks.compileJava)
+
+    archiveBaseName.set("log4j-patch-agent")
+
+    manifest {
+        attributes("Premain-Class" to "org.glavo.log4j.patch.agent.Log4jAgent")
+    }
+
+    from(sourceSets["agent"].output)
+    from(sourceSets["main"].output) {
+        includeEmptyDirs = false
+        eachFile { path = "org/glavo/log4j/patch/agent/$name.bin" }
+    }
+
+}
+
+tasks.jar {
+    enabled = false
+    dependsOn(agentJar)
+}