feat: worker max heap is configurable via task input property.

README.adoc

@@ -74,6 +74,7 @@ txtOutputFile:: Path to the generated TXT report. Type: _File_. Default value: _
 semverOutputFile:: Path to the generated semantic versioning report. Type: _File_. Default value: _null_
 includeSynthetic:: Synthetic classes and class members (like e.g. bridge methods) are not tracked per default. This new option enables the tracking of such kind of classes and class members
 ignoreMissingClasses:: Ignores all superclasses or interfaces that missing on the classpath. Default value: _false_
+maxWorkerHeap:: The max heap for the Gradle worker process. Type: _String_. Default value: _null_
 
 If you don't set _oldArchives_ and _newArchives_, the plugin will infer them from the _oldClasspath_ and _newClasspath_ properties:
 

src/main/java/me/champeau/gradle/japicmp/JapicmpTask.java

@@ -26,6 +26,7 @@
 import org.gradle.api.tasks.Optional;
 import org.gradle.api.tasks.OutputFile;
 import org.gradle.api.tasks.TaskAction;
+import org.gradle.process.JavaForkOptions;
 import org.gradle.workers.ProcessWorkerSpec;
 import org.gradle.workers.WorkerExecutor;
 
@@ -75,6 +76,15 @@ private void execForNewGradle(final List<JApiCmpWorkerAction.Archive> baseline,
             @Override
             public void execute(ProcessWorkerSpec spec) {
                 spec.getClasspath().from(calculateWorkerClasspath());
+
+                String maxWorkerHeap = getMaxWorkerHeap().getOrNull();
+                if (maxWorkerHeap != null) {
+                    spec.forkOptions(new Action<JavaForkOptions>() {
+                        @Override public void execute(JavaForkOptions javaForkOptions) {
+                            javaForkOptions.setMaxHeapSize(maxWorkerHeap);
+                        }
+                    });
+                }
             }
         }).submit(JApiCmpWorkAction.class, new Action<JapiCmpWorkParameters>() {
             @Override
@@ -354,4 +364,8 @@ public void addExcludeFilter(Class<? extends Filter> excludeFilterClass) {
     @Nested
     public abstract Property<RichReport> getRichReport();
 
+    @Optional
+    @Input
+    public abstract Property<String> getMaxWorkerHeap();
+
 }