35 – Task Actions

.github/workflows/build.yaml

@@ -53,4 +53,5 @@ jobs:
       - run: "gradle build -Dorg.gradle.kotlin.dsl.skipMetadataVersionCheck=false --configuration-cache --warning-mode=fail -p 32_Artifact_Transforms/my-project"
       - run: "gradle build -Dorg.gradle.kotlin.dsl.skipMetadataVersionCheck=false --configuration-cache --warning-mode=fail -p 33_Classpath_and_Module_Path_in_Testing/my-project"
       - run: "gradle build -Dorg.gradle.kotlin.dsl.skipMetadataVersionCheck=false --configuration-cache --warning-mode=fail -p 34_Properties_and_Providers/my-project"
-      - run: "gradle build -Dorg.gradle.kotlin.dsl.skipMetadataVersionCheck=false --configuration-cache --warning-mode=fail -p 35_Working_with_Files/my-project"
+      - run: "gradle build -Dorg.gradle.kotlin.dsl.skipMetadataVersionCheck=false --configuration-cache --warning-mode=fail -p 35_Working_with_Files/my-project"
+      - run: "gradle run   -Dorg.gradle.kotlin.dsl.skipMetadataVersionCheck=false --configuration-cache --warning-mode=fail -p 36_Task_Actions/my-project"

36_Task_Actions/README.MD

@@ -0,0 +1,21 @@
+# Understanding Gradle #36 – Task Actions
+
+**👇 click thumbnail to watch video**
+
+[<img src="https://onepiecesoftware.github.io/img/videos/36.png" width="640">](https://www.youtube.com/watch?v=7ueAnM7ADm4&list=PLWQK2ZdV4Yl2k2OmC_gsjDpdIBTN0qqkE)
+
+Tweak what a task is doing by adding or modifying task actions.
+
+## Explore this sample
+
+This sample is best explored in [IntelliJ IDEA](https://www.jetbrains.com/idea/download).
+Open **`36_Task_Actions/my-project`** in IDEA and confirm with _Trust Project_.
+
+## Further readings
+
+* [Configuring Tasks](https://docs.gradle.org/current/userguide/more_about_tasks.html#sec:configuring_tasks)
+* ['doFirst' / 'doLast' and Configuration Cache](https://docs.gradle.org/current/userguide/common_caching_problems.html#suggestions_for_authoring_your_build)
+
+## Need Gradle support?
+
+Contact me, if you need help with Gradle: [onepiece.Software](https://onepiece.software).

36_Task_Actions/my-build-logic/java-plugins/build.gradle.kts

@@ -0,0 +1,3 @@
+plugins {
+    `kotlin-dsl`
+}

36_Task_Actions/my-build-logic/java-plugins/src/main/kotlin/PrintVersion.kt

@@ -0,0 +1,15 @@
+import org.gradle.api.DefaultTask
+import org.gradle.api.provider.Property
+import org.gradle.api.tasks.Input
+import org.gradle.api.tasks.TaskAction
+
+abstract class PrintVersion : DefaultTask() {
+
+    @get:Input
+    abstract val version: Property<String>
+
+    @TaskAction
+    fun print() {
+        println("Version: ${version.get()}")
+    }
+}

36_Task_Actions/my-build-logic/java-plugins/src/main/kotlin/my-java-application.gradle.kts

@@ -0,0 +1,28 @@
+plugins {
+    id("application")
+}
+
+tasks.compileJava {
+    actions.clear() // Remove compile action from JavaCompile task
+    doFirst {
+        println("Number of task actions: " + actions.size)
+    }
+    doLast {
+        this as JavaCompile
+        Runtime.getRuntime().exec( // Add our own 'java compile' implementation
+            "javac ${source.asPath} -d ${destinationDirectory.get().asFile}").waitFor()
+        println("Compilation finished: ${inputs.sourceFiles.asPath}")
+    }
+}
+
+tasks.register<PrintVersion>("printVersion") {
+    version = project.version as String
+}
+
+tasks.register("printVersionDynamic") {
+    inputs.property("version", project.version)
+    doLast {
+        // Task action / execution time code
+        println("Version: ${inputs.properties["version"]}")
+    }
+}

36_Task_Actions/my-build-logic/settings.gradle.kts

@@ -0,0 +1,5 @@
+dependencyResolutionManagement {
+    repositories.gradlePluginPortal()
+}
+
+include("java-plugins")

36_Task_Actions/my-project/app/build.gradle.kts

@@ -0,0 +1,9 @@
+plugins {
+    id("my-java-application")
+}
+
+version = "1.0"
+
+application {
+    mainClass = "org.example.app.App"
+}

36_Task_Actions/my-project/app/src/main/java/org/example/app/App.java

@@ -0,0 +1,8 @@
+package org.example.app;
+
+public class App {
+
+    public static void main(String[] args) {
+        System.out.println("Hello World \uD83D\uDE80");
+    }
+}

36_Task_Actions/my-project/gradle.properties

@@ -0,0 +1 @@
+org.gradle.configuration-cache=true

36_Task_Actions/my-project/settings.gradle.kts

@@ -0,0 +1,12 @@
+// Locations of Gradle plugins
+pluginManagement {
+    repositories.gradlePluginPortal()
+    includeBuild("../my-build-logic")
+}
+
+// Location of other components
+dependencyResolutionManagement {
+    repositories.mavenCentral()
+}
+
+include("app")

README.MD

@@ -64,6 +64,7 @@ This gives you a general understanding of how things work in Gradle and enables
 
 34. [Properties and Providers](34_Properties_and_Providers)
 35. [Working with Files](35_Working_with_Files)
+36. [Task Actions](36_Task_Actions)
 
 ## Need Gradle support?