Fixed global exec example to be cross-platform.

Author: ianbrandt

build-logic/src/main/kotlin/org.sdkotlin.buildlogic.global-exec.gradle.kts

@@ -1,58 +1,5 @@
-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
-		}
-	}
-}
+import org.sdkotlin.buildlogic.globalexec.BuildScopedGreetingService
+import org.sdkotlin.buildlogic.globalexec.ProjectScopedGreetingTask
 
 gradle.sharedServices.registerIfAbsent(
 	BuildScopedGreetingService.SERVICE_NAME,

build-logic/src/main/kotlin/org/sdkotlin/buildlogic/globalexec/GlobalExec.kt

@@ -0,0 +1,87 @@
+package org.sdkotlin.buildlogic.globalexec
+
+import org.gradle.api.DefaultTask
+import org.gradle.api.GradleException
+import org.gradle.api.provider.Property
+import org.gradle.api.services.BuildService
+import org.gradle.api.services.BuildServiceParameters
+import org.gradle.api.services.ServiceReference
+import org.gradle.api.tasks.TaskAction
+import org.gradle.kotlin.dsl.provideDelegate
+import org.gradle.process.ExecOperations
+import javax.inject.Inject
+
+abstract class BuildScopedGreetingService :
+	BuildService<BuildScopedGreetingService.Params> {
+	interface Params : BuildServiceParameters {
+		val greeting: Property<String>
+	}
+
+	companion object {
+		const val SERVICE_NAME = "buildScopedGreetingService"
+	}
+
+	@get:Inject
+	abstract val execOperations: ExecOperations
+
+	val exitValue: Int by lazy {
+		execOperations.exec {
+			commandLine(
+				buildCurrentOsCommand(
+					"echo", "Hello, ${parameters.greeting.get()}"
+				)
+			)
+			standardOutput = System.out
+		}.exitValue
+	}
+}
+
+abstract class ProjectScopedGreetingTask : 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>
+
+	@get:Inject
+	abstract val execOperations: ExecOperations
+
+	@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(
+				buildCurrentOsCommand("echo", greeting)
+			)
+			standardOutput = System.out
+		}
+	}
+}
+
+fun buildCurrentOsCommand(vararg arguments: String): List<String> =
+	buildList {
+		val isWindows = System.getProperty("os.name")
+			.contains("windows", ignoreCase = true)
+		if (isWindows) {
+			add("cmd.exe")
+			add("/c")
+		}
+		addAll(arguments)
+	}