Improve testability for different versions (#4018)

* Ignore run folders

* Add a bulk of supported test environments

* Fix gitignore

* Fix gitignore

* Fix gitignore

.gitignore

@@ -137,3 +137,7 @@ docs/
 build/
 
 .DS_Store
+# Ignore run folders
+run-[0-0].[0-9]/
+run-[0-0].[0-9].[0-9]/
+

build.gradle.kts

@@ -1,6 +1,7 @@
 import com.diffplug.gradle.spotless.SpotlessPlugin
 import com.github.jengelman.gradle.plugins.shadow.ShadowPlugin
 import java.net.URI
+import xyz.jpenilla.runpaper.task.RunServer
 
 plugins {
     java
@@ -15,6 +16,8 @@ plugins {
 
     eclipse
     idea
+
+    id("xyz.jpenilla.run-paper") version "2.0.1"
 }
 
 group = "com.plotsquared"
@@ -218,3 +221,17 @@ nexusPublishing {
 tasks.getByName<Jar>("jar") {
     enabled = false
 }
+
+val supportedVersions = listOf("1.16.5", "1.17", "1.17.1", "1.18.2", "1.19", "1.19.1", "1.19.2", "1.19.3", "1.19.4")
+tasks {
+    supportedVersions.forEach {
+        register<RunServer>("runServer-$it") {
+            minecraftVersion(it)
+            pluginJars(*project(":PlotSquared-Bukkit").getTasksByName("shadowJar", false).map { (it as Jar).archiveFile }
+                    .toTypedArray())
+            jvmArgs("-DPaper.IgnoreJavaVersion=true", "-Dcom.mojang.eula.agree=true")
+            group = "run paper"
+            runDirectory.set(file("run-$it"))
+        }
+    }
+}