added example of plugin usage

.gitignore

@@ -111,4 +111,5 @@ java/build/
 /java/preprocessor/build
 /java/lsp/build
 /core/examples/build
-/java/gradle/build
+/java/gradle/build
+/java/gradle/example/.processing

gradle/libs.versions.toml

@@ -24,6 +24,8 @@ lsp4j = { module = "org.eclipse.lsp4j:org.eclipse.lsp4j", version = "0.22.0" }
 jsoup = { module = "org.jsoup:jsoup", version = "1.17.2" }
 antlr4 = { module = "org.antlr:antlr4", version.ref = "antlr" }
 antlr4Runtime = { module = "org.antlr:antlr4-runtime", version.ref = "antlr" }
+composeGradlePlugin = { module = "org.jetbrains.compose:compose-gradle-plugin", version.ref = "compose-plugin" }
+kotlinGradlePlugin = { module = "org.jetbrains.kotlin:kotlin-gradle-plugin", version.ref = "kotlin" }
 
 [plugins]
 jetbrainsCompose = { id = "org.jetbrains.compose", version.ref = "compose-plugin" }

java/gradle/build.gradle.kts

@@ -9,14 +9,13 @@ version = rootProject.version
 
 repositories {
     mavenCentral()
-    maven { url = uri("https://jogamp.org/deployment/maven") }
 }
 
 dependencies{
     implementation(project(":java:preprocessor"))
 
-    implementation("org.jetbrains.compose:compose-gradle-plugin:1.7.3")
-    implementation("org.jetbrains.kotlin:kotlin-gradle-plugin:1.9.21")
+    implementation(libs.composeGradlePlugin)
+    implementation(libs.kotlinGradlePlugin)
 }
 
 gradlePlugin{

java/gradle/example/brightness.pde

@@ -0,0 +1,32 @@
+/**
+ * Brightness
+ * by Rusty Robison.
+ *
+ * Brightness is the relative lightness or darkness of a color.
+ * Move the cursor vertically over each bar to alter its brightness.
+ */
+
+int barWidth = 20;
+int lastBar = -1;
+
+import controlP5.*;
+
+ControlP5 cp5;
+
+
+void setup() {
+  size(640, 360);
+  colorMode(HSB, width, 100, height);
+  noStroke();
+  background(0);
+}
+
+void draw() {
+  int whichBar = mouseX / barWidth;
+  if (whichBar != lastBar) {
+    int barX = whichBar * barWidth;
+    fill(barX, 100, mouseY);
+    rect(barX, 0, barWidth, height);
+    lastBar = whichBar;
+  }
+}

java/gradle/example/build.gradle.kts

@@ -0,0 +1,3 @@
+plugins{
+    id("org.processing.java.gradle") version "4.4.0"
+}

java/gradle/example/settings.gradle.kts

@@ -0,0 +1,6 @@
+pluginManagement {
+    repositories {
+        mavenLocal()
+        gradlePluginPortal()
+    }
+}

java/gradle/src/main/kotlin/ProcessingPlugin.kt

@@ -130,8 +130,7 @@ class ProcessingPlugin @Inject constructor(private val objectFactory: ObjectFact
 
         val sketchbook = prefs.getProperty("sketchbook.path.four")
 
-        File(sketchbook, "libraries").listFiles { file -> file.isDirectory
-        }?.forEach{
+        File(sketchbook, "libraries").listFiles { file -> file.isDirectory }?.forEach{
             project.dependencies.add("implementation", project.fileTree(it).apply { include("**/*.jar") })
         }
     }

java/preprocessor/build.gradle.kts

@@ -6,7 +6,7 @@ plugins{
     alias(libs.plugins.mavenPublish)
 }
 
-
+version = rootProject.version
 
 repositories{
     mavenCentral()
@@ -21,7 +21,12 @@ sourceSets{
             include("processing/mode/java/preproc/**/*", "processing/app/**/*")
         }
     }
-
+}
+afterEvaluate{
+    tasks.withType(Jar::class.java){
+        duplicatesStrategy = DuplicatesStrategy.EXCLUDE
+        dependsOn(tasks.generateGrammarSource)
+    }
 }
 
 dependencies{