From 9956f5bc464025e251a16d81f6ad37df6f1633df Mon Sep 17 00:00:00 2001
From: Ian Brandt <ian@ianbrandt.com>
Date: Mon, 11 Nov 2024 10:11:38 -0800
Subject: [PATCH] Added an example of a project-scoped exec task that depends
 on a build-scoped exec from a shared build service.

---
 ...sdkotlin.buildlogic.global-exec.gradle.kts | 64 +++++++++++++++++++
 .../build.gradle.kts                          |  1 +
 .../kotlin-for-java-devs/build.gradle.kts     |  3 +-
 subprojects/tdd-in-kotlin/build.gradle.kts    |  1 +
 4 files changed, 67 insertions(+), 2 deletions(-)
 create mode 100644 build-logic/src/main/kotlin/org.sdkotlin.buildlogic.global-exec.gradle.kts

diff --git a/build-logic/src/main/kotlin/org.sdkotlin.buildlogic.global-exec.gradle.kts b/build-logic/src/main/kotlin/org.sdkotlin.buildlogic.global-exec.gradle.kts
new file mode 100644
index 0000000..c907107
--- /dev/null
+++ b/build-logic/src/main/kotlin/org.sdkotlin.buildlogic.global-exec.gradle.kts
@@ -0,0 +1,64 @@
+abstract class BuildScopedGreetingService @Inject constructor(
+	execOperations: ExecOperations,
+) : BuildService<BuildScopedGreetingService.Params> {
+
+	companion object {
+		const val SERVICE_NAME = "buildScopedGreetingService"
+	}
+
+	interface Params : BuildServiceParameters {
+		val greeting: Property<String>
+	}
+
+	val exitValue: Int =
+		execOperations.exec {
+			commandLine("echo", "Hello, ${parameters.greeting.get()}")
+			standardOutput = System.out
+		}.exitValue
+}
+
+abstract class ProjectScopedGreetingTask @Inject constructor(
+	private val execOperations: ExecOperations,
+) : DefaultTask() {
+
+	init {
+		group = "demo"
+		description = "A project-scoped exec task that depends on a " +
+			"build-scoped exec from a shared build service."
+	}
+
+	@Suppress("UnstableApiUsage")
+	@get:ServiceReference(BuildScopedGreetingService.SERVICE_NAME)
+	abstract val buildScopedGreetingService: Property<BuildScopedGreetingService>
+
+	@TaskAction
+	fun doTaskAction() {
+
+		val buildScopedGreetingServiceInstance: BuildScopedGreetingService =
+			buildScopedGreetingService.get()
+
+		val exitValue = buildScopedGreetingServiceInstance.exitValue
+
+		if (exitValue != 0)
+			throw GradleException(
+				"Build service exec resulted in a non-zero exit value $exitValue!"
+			)
+
+		val greeting =
+			buildScopedGreetingServiceInstance.parameters.greeting.get()
+
+		execOperations.exec {
+			commandLine("echo", greeting)
+			standardOutput = System.out
+		}
+	}
+}
+
+gradle.sharedServices.registerIfAbsent(
+	BuildScopedGreetingService.SERVICE_NAME,
+	BuildScopedGreetingService::class.java
+) {
+	parameters.greeting.set("Doctor");
+}
+
+tasks.register<ProjectScopedGreetingTask>("greetings")
diff --git a/subprojects/kotlin-for-java-devs-client/build.gradle.kts b/subprojects/kotlin-for-java-devs-client/build.gradle.kts
index d6a14a7..0cd4814 100644
--- a/subprojects/kotlin-for-java-devs-client/build.gradle.kts
+++ b/subprojects/kotlin-for-java-devs-client/build.gradle.kts
@@ -1,4 +1,5 @@
 plugins {
+	id("org.sdkotlin.buildlogic.global-exec")
 	id("org.sdkotlin.buildlogic.kotlin-project")
 	id("org.sdkotlin.buildlogic.test.unit-test-suite")
 }
diff --git a/subprojects/kotlin-for-java-devs/build.gradle.kts b/subprojects/kotlin-for-java-devs/build.gradle.kts
index aaf323a..859f551 100644
--- a/subprojects/kotlin-for-java-devs/build.gradle.kts
+++ b/subprojects/kotlin-for-java-devs/build.gradle.kts
@@ -1,6 +1,5 @@
-import org.jetbrains.kotlin.gradle.tasks.KotlinCompile
-
 plugins {
+	id("org.sdkotlin.buildlogic.global-exec")
 	id("org.sdkotlin.buildlogic.kotlin-project")
 	id("org.sdkotlin.buildlogic.test.unit-test-suite")
 }
diff --git a/subprojects/tdd-in-kotlin/build.gradle.kts b/subprojects/tdd-in-kotlin/build.gradle.kts
index d6ee3af..76df370 100644
--- a/subprojects/tdd-in-kotlin/build.gradle.kts
+++ b/subprojects/tdd-in-kotlin/build.gradle.kts
@@ -1,4 +1,5 @@
 plugins {
+	id("org.sdkotlin.buildlogic.global-exec")
 	id("org.sdkotlin.buildlogic.kotlin-project")
 	id("org.sdkotlin.buildlogic.test.test-fixtures-project")
 	id("org.sdkotlin.buildlogic.test.unit-test-suite")