Upgrader

HMCLCore/src/main/kotlin/org/jackhuang/hmcl/task/Task.kt

@@ -132,6 +132,7 @@ abstract class Task {
     fun executor() = TaskExecutor(this)
     fun executor(taskListener: TaskListener) = TaskExecutor(this).apply { this.taskListener = taskListener }
     fun start() = executor().start()
+    fun test() = executor().test()
     fun subscribe(subscriber: Task) = TaskExecutor(with(subscriber)).apply { start() }
 
     fun subscribe(scheduler: Scheduler = Scheduler.DEFAULT, closure: (AutoTypingMap<String>) -> Unit) = subscribe(task(scheduler, closure))

HMCLCore/src/main/kotlin/org/jackhuang/hmcl/task/TaskExecutor.kt

@@ -47,6 +47,20 @@ class TaskExecutor(private val task: Task) {
         })
     }
 
+    @Throws(InterruptedException::class)
+    fun test(): Boolean {
+        var flag = true
+        val future = Scheduler.NEW_THREAD.schedule {
+            if (!executeTasks(listOf(task))) {
+                taskListener?.onTerminate()
+                flag = false
+            }
+        }
+        workerQueue.add(future)
+        future!!.get()
+        return flag
+    }
+
     /**
      * Cancel the subscription ant interrupt all tasks.
      */

HMCLCore/src/main/kotlin/org/jackhuang/hmcl/util/OS.kt

@@ -28,23 +28,23 @@ import java.util.*
 /**
  * Represents the operating system.
  */
-enum class OS {
+enum class OS(val checkedName: String) {
     /**
      * Microsoft Windows.
      */
-    WINDOWS,
+    WINDOWS("windows"),
     /**
      * Linux and Unix like OS, including Solaris.
      */
-    LINUX,
+    LINUX("linux"),
     /**
      * Mac OS X.
      */
-    OSX,
+    OSX("osx"),
     /**
      * Unknown operating system.
      */
-    UNKNOWN;
+    UNKNOWN("universal");
 
     companion object {
         /**

HMCLCore/src/main/kotlin/org/jackhuang/hmcl/util/VersionNumber.kt

@@ -75,6 +75,8 @@ class StringVersionNumber internal constructor(val version: String): VersionNumb
  */
 class IntVersionNumber internal constructor(val version: List<Int>): VersionNumber() {
 
+    operator fun get(index: Int) = version[index]
+
     override fun compareTo(other: VersionNumber): Int {
         if (other !is IntVersionNumber) return 0
         val len = minOf(this.version.size, other.version.size)