Upgraded ds1viewer to application plugin

ds1viewer/build.gradle

@@ -1,13 +1,13 @@
 apply plugin: 'java'
-
-import org.apache.tools.ant.taskdefs.condition.Os
+apply plugin: 'application'
 
 [compileJava, compileTestJava]*.options*.encoding = 'UTF-8'
 
 sourceSets.main.resources.srcDirs += [ rootProject.file('assets').path ]
 
-project.ext.mainClassName = 'com.riiablo.map.DS1Viewer'
-project.ext.visuiVersion = '1.4.0'
+project.ext {
+  visuiVersion = '1.4.0'
+}
 
 dependencies {
   implementation project(':core')
@@ -18,24 +18,35 @@ dependencies {
   implementation "com.kotcrab.vis:vis-ui:$visuiVersion"
 }
 
-task run(dependsOn: classes, type: JavaExec) {
-  main = project.mainClassName
-  classpath = sourceSets.main.runtimeClasspath
-  standardInput = System.in
-  workingDir = rootProject.file('assets').path
-  ignoreExitValue = true
-
-  if(Os.isFamily(Os.FAMILY_MAC))
-    jvmArgs += "-XstartOnFirstThread"
+application {
+  mainClass = 'com.riiablo.map.DS1Viewer'
 }
 
-task dist(dependsOn: classes, type: Jar) {
-  from files(sourceSets.main.output.classesDirs)
-  from files(sourceSets.main.output.resourcesDir)
-  from { configurations.compile.collect { zipTree(it) } }
-  from files(rootProject.file('assets').path);
+run {
+  workingDir = rootProject.file('assets').path
+  setIgnoreExitValue(true)
 
-  manifest {
-    attributes 'Main-Class': project.mainClassName
+  // Required to run LWJGL3 java apps on MacOS
+  if (org.gradle.internal.os.OperatingSystem.current() == org.gradle.internal.os.OperatingSystem.MAC_OS) {
+    jvmArgs += "-XstartOnFirstThread"
+  }
+}
+
+jar {
+  archiveBaseName = project.name
+  // These can be excluded because they add to the jar size but libGDX 1.9.11 can't use them.
+  // If your libGDX version is 1.9.10 or earlier, or is 1.9.12-SNAPSHOT or later, you can leave
+  // the following line commented; if you use 1.9.11 exactly, or if you use 1.9.12-SNAPSHOT but
+  // don't need ARM Linux support, you can uncomment it safely.
+  // It's always safe to keep that line commented out; it only affects JAR size.
+  // exclude('linux/arm32/**', 'linux/arm64/**')
+  dependsOn configurations.runtimeClasspath
+  from { configurations.runtimeClasspath.collect { it.isDirectory() ? it : zipTree(it) } }
+  manifest {
+    attributes 'Main-Class': application.mainClass
+  }
+
+  doLast {
+    file(archiveFile).setExecutable(true, false)
   }
 }