Merge pull request #125 from takahirom/add-compiler-metrics-option

Add compose compiler metrics option

build-logic/convention/src/main/kotlin/com/google/samples/apps/nowinandroid/AndroidCompose.kt

@@ -19,8 +19,8 @@ package com.google.samples.apps.nowinandroid
 import com.android.build.api.dsl.CommonExtension
 import org.gradle.api.Project
 import org.gradle.api.artifacts.VersionCatalogsExtension
-import org.gradle.kotlin.dsl.dependencies
 import org.gradle.kotlin.dsl.getByType
+import java.io.File
 
 /**
  * Configure Compose-specific options
@@ -38,5 +38,33 @@ internal fun Project.configureAndroidCompose(
         composeOptions {
             kotlinCompilerExtensionVersion = libs.findVersion("androidxCompose").get().toString()
         }
+
+        kotlinOptions {
+            freeCompilerArgs = freeCompilerArgs + buildComposeMetricsParameters()
+        }
+    }
+}
+
+private fun Project.buildComposeMetricsParameters(): List<String> {
+    val metricParameters = mutableListOf<String>()
+    val enableMetricsProvider = project.providers.gradleProperty("enableComposeCompilerMetrics")
+    val enableMetrics = (enableMetricsProvider.orNull == "true")
+    if (enableMetrics) {
+        val metricsFolder = File(project.buildDir, "compose-metrics")
+        metricParameters.add("-P")
+        metricParameters.add(
+            "plugin:androidx.compose.compiler.plugins.kotlin:metricsDestination=" + metricsFolder.absolutePath
+        )
+    }
+
+    val enableReportsProvider = project.providers.gradleProperty("enableComposeCompilerReports")
+    val enableReports = (enableReportsProvider.orNull == "true")
+    if (enableReports) {
+        val reportsFolder = File(project.buildDir, "compose-reports")
+        metricParameters.add("-P")
+        metricParameters.add(
+            "plugin:androidx.compose.compiler.plugins.kotlin:reportsDestination=" + reportsFolder.absolutePath
+        )
     }
+    return metricParameters.toList()
 }

build-logic/convention/src/main/kotlin/com/google/samples/apps/nowinandroid/KotlinAndroid.kt

@@ -70,6 +70,6 @@ internal fun Project.configureKotlinAndroid(
     }
 }
 
-private fun CommonExtension<*, *, *, *>.kotlinOptions(block: KotlinJvmOptions.() -> Unit) {
+fun CommonExtension<*, *, *, *>.kotlinOptions(block: KotlinJvmOptions.() -> Unit) {
     (this as ExtensionAware).extensions.configure("kotlinOptions", block)
 }