Added a small error if the user forgot to clone the sub-project, and some extra comments

build.gradle

@@ -313,10 +313,17 @@ subprojects { p ->
 
     // Put stuff from gradle.properties into the mod info
     processResources {
+        duplicatesStrategy = DuplicatesStrategy.WARN
         // Include all the resources
         from project(":common").sourceSets.main.resources
         from project(":core").sourceSets.main.resources
         from project(":api").sourceSets.main.resources
+        
+        // Copy accessWideners
+        // FIXME: remove copyCommonLoaderResources and use this instead (and if you are removing that task, also remove copyCoreResources while your at it)
+//        from project(":common").file("src/main/resources/${accessWidenerVersion}.distanthorizons.accesswidener")
+//        into(file(p.file("build/resources/main")))
+//        rename "${accessWidenerVersion}.distanthorizons.accesswidener", "distanthorizons.accesswidener"
 
         // Location of where to inject the properties
         def resourceTargets = [
@@ -476,7 +483,7 @@ allprojects { p ->
     javadoc.title = rootProject.mod_name + "-" + project.name
 
     // Some annotations arent "technically" part of the official java standard,
-    // so we define it ourself here
+    //  so we define it ourself here
     javadoc {
         configure( options ) {
             tags(
@@ -563,6 +570,7 @@ allprojects { p ->
         // Set the OS lwjgl is using to the current os
         project.ext.lwjglNatives = "natives-" + os.toFamilyName()
 
+        // TODO: Include Minecraft in core-projects but dont include MC code stuff
         dependencies { // All of these dependencies are in Vanilla Minecraft, but we need to depend on it as we arent importing Minecraft in the core
             // Imports most of lwjgl's libraries (well, only the ones that we need)
             implementation platform("org.lwjgl:lwjgl-bom:${rootProject.lwjgl_version}") // TODO: Use Minecraft's version for lwjgl_version (which changes in nearly every version) instead of a hard defined version for all versions

settings.gradle

@@ -50,6 +50,21 @@ plugins {
 
 
 
+// Throw an error and a little help message if the user forgot to clone the core sub-project
+if (!file("./coreSubProjects/LICENSE.txt").exists()) { // the LICENCE.txt file should always, and only exist if the core-sub-project was cloned
+    println('''
+It seems that the core sub project was not included...
+ please make sure that when you were cloning the repo, you were using the `--recurse-submodules` flag on git.
+ and if its too late now to re-clone the project, please grab the core sub project in whatever way you can from https://gitlab.com/jeseibel/distant-horizons-core.git
+
+If you still need help with compiling, please read the Readme.md
+    ''')
+    throw new GradleException("coreSubProject not found")
+}
+
+
+
+
 /** Loads the VersionProperties fiel for the currently selected Minecraft version. */
 def loadProperties() {
     def defaultMcVersion = "1.20.1" // 1.20.1 is our current most stable version so we use that if no version was defined