Add Spotless linter

Author: rubensworks

build.gradle

@@ -11,6 +11,7 @@ buildscript {
 
 plugins {
     id 'com.matthewprenger.cursegradle' version '1.4.0'
+    id 'com.diffplug.spotless' version '5.14.3'
 }
 
 apply plugin: 'net.minecraftforge.gradle'
@@ -288,3 +289,13 @@ idea {
         }
     }
 }
+
+spotless {
+    java {
+        target 'src/*/java/org/cyclops/**/*.java'
+
+        endWithNewline()
+        trimTrailingWhitespace()
+        removeUnusedImports()
+    }
+}

gradle.properties

@@ -5,3 +5,10 @@ cyclopscore_version=1.12.1-100
 release_type=release
 fingerprint=bd0353b3e8a2810d60dd584e256e364bc3bedd44
 
+# Workaround for Spotless bug
+# https://github.com/diffplug/spotless/issues/834
+org.gradle.jvmargs=--add-exports jdk.compiler/com.sun.tools.javac.api=ALL-UNNAMED \
+  --add-exports jdk.compiler/com.sun.tools.javac.file=ALL-UNNAMED \
+  --add-exports jdk.compiler/com.sun.tools.javac.parser=ALL-UNNAMED \
+  --add-exports jdk.compiler/com.sun.tools.javac.tree=ALL-UNNAMED \
+  --add-exports jdk.compiler/com.sun.tools.javac.util=ALL-UNNAMED

src/main/java/org/cyclops/structuredcrafting/GeneralConfig.java

@@ -29,7 +29,7 @@ public class GeneralConfig extends DummyConfig {
     public GeneralConfig() {
         super(StructuredCrafting._instance, "general");
     }
-    
+
     @Override
     public void onRegistered() {
         getMod().putGenericReference(ModBase.REFKEY_CRASH_ON_INVALID_RECIPE, GeneralConfig.crashOnInvalidRecipe);