Include only the mod meta data file for the respective loader

Also clean up the entire processResources block in the process cause it was a
mere coincidence that it has worked properly.

versions/common.gradle

@@ -458,36 +458,29 @@ jar {
     }
 }
 
-processResources
-        {
-            // this will ensure that this task is redone when the versions change.
-            inputs.property 'version', { project.version }
-            inputs.property 'mcversion', { mcVersionStr }
+processResources {
+    // this will ensure that this task is redone when the versions change.
+    inputs.property 'version', { project.version }
+    inputs.property 'mcversion', { mcVersionStr }
 
-            // replace stuff in mcmod.info (forge) and fabric.mod.json, nothing else
-            from(sourceSets.main.resources.srcDirs) { spec ->
-                include 'mcmod.info'
-                include 'fabric.mod.json'
+    // replace stuff in mcmod.info (forge) and fabric.mod.json, nothing else
+    filesMatching(['mcmod.info', 'fabric.mod.json']) {
+        // replace version and mcversion
+        expand 'version': project.version, 'mcversion': mcVersionStr
+    }
 
-                // replace version and mcversion
-                afterEvaluate {
-                    spec.expand 'version': project.version, 'mcversion': mcVersionStr
-                }
-            }
+    // strip comments from (strict) JSON files
+    filesMatching('pack.mcmeta') {
+        filter { line -> line.trim().startsWith('//') ? '' : line}
+    }
 
-            // strip comments from (strict) JSON files
-            from(sourceSets.main.resources.srcDirs) {
-                include 'pack.mcmeta'
-                filter { line -> line.trim().startsWith('//') ? '' : line}
-            }
-
-            // copy everything else, thats not the mcmod.info or fabric.mod.json
-            from(sourceSets.main.resources.srcDirs) {
-                exclude 'mcmod.info'
-                exclude 'fabric.mod.json'
-                exclude 'pack.mcmeta'
-            }
-        }
+    // exclude mod meta for non-applicable loader
+    if (FABRIC) {
+        exclude 'mcmod.info'
+    } else {
+        exclude 'fabric.mod.json'
+    }
+}
 
 sourceSets {
     integrationTest {