Update build.gradle from template

Author: MEEPofFaith

build.gradle

@@ -19,6 +19,8 @@ ext{
     //the build number that this mod is made for
     mindustryVersion = 'v145.1'
     jabelVersion = "93fde537c7"
+    //windows sucks
+    isWindows = System.getProperty("os.name").toLowerCase().contains("windows")
     sdkRoot = System.getenv("ANDROID_HOME") ?: System.getenv("ANDROID_SDK_ROOT")
 }
 
@@ -58,8 +60,10 @@ task jarAndroid{
         //collect dependencies needed for desugaring
         def dependencies = (configurations.compileClasspath.asList() + configurations.runtimeClasspath.asList() + [new File(platformRoot, "android.jar")]).collect{ "--classpath $it.path" }.join(" ")
 
+        def d8 = isWindows ? "d8.bat" : "d8"
+
         //dex and desugar files - this requires d8 in your PATH
-        "d8 $dependencies --min-api 14 --output ${project.archivesBaseName}Android.jar ${project.archivesBaseName}Desktop.jar"
+        "$d8 $dependencies --min-api 14 --output ${project.archivesBaseName}Android.jar ${project.archivesBaseName}Desktop.jar"
             .execute(null, new File("$buildDir/libs")).waitForProcessOutput(System.out, System.err)
     }
 }