Allow cache relocatability for Delombok task

build.gradle

@@ -17,6 +17,24 @@ plugins {
 
 apply from: "$rootDir/gradle/ci-support.gradle"
 
+/**
+ * Allows build cache relocatability for Delombok task
+ */
+class DelombokArgumentProvider implements CommandLineArgumentProvider {
+
+    @InputFiles
+    @PathSensitive(PathSensitivity.RELATIVE)
+    Set<File> srcDirs
+
+    @Internal
+    File outputDir
+
+    @Override
+    Iterable<String> asArguments() {
+        return [srcDirs.collect { it.absolutePath }.join(" "), "-d", outputDir.absolutePath, "-f", "generateDelombokComment:skip"]
+    }
+}
+
 subprojects {
     apply plugin: 'java-library'
     apply plugin: 'idea'
@@ -43,18 +61,22 @@ subprojects {
         version = '1.18.20'
     }
 
+
     task delombok(type: io.franzbecker.gradle.lombok.task.DelombokTask) {
         def outputDir = file("$buildDir/delombok")
         outputs.dir(outputDir)
         outputs.cacheIf {
             true
         }
+        def i = 1
         for (srcDir in project.sourceSets.main.java.srcDirs) {
-            // TODO: named input and relative path for `srcDir` to make task more cacheable
             inputs.dir(srcDir)
-            // TODO: `outputDir` as relative path to make task more cacheable 
-            args(srcDir, "-d", outputDir, "-f", "generateDelombokComment:skip")
+                  .withPropertyName("srcDir${i++}")
+                  .withPathSensitivity(PathSensitivity.RELATIVE)
         }
+        argumentProviders.addAll(
+            new DelombokArgumentProvider(srcDirs: project.sourceSets.main.java.srcDirs, outputDir: outputDir)
+        )
     }
     delombok.onlyIf {
         project.sourceSets.main.java.srcDirs.find { it.exists() }