Apply suggestions from code review

Co-authored-by: Simon Marquis <contact@simon-marquis.fr>

README.md

@@ -159,8 +159,8 @@ Run the following command to get and analyse compose compiler metrics:
 ./gradlew assembleRelease -PenableComposeCompilerMetrics=true -PenableComposeCompilerReports=true
 ```
 
-The reports files will be added to build/compose-reports in root folder. The metrics files will also be 
-added to build/compose-metrics in root folder.
+The reports files will be added to [build/compose-reports](build/compose-reports). The metrics files will also be 
+added to [build/compose-metrics](build/compose-metrics).
 
 For more information on Compose compiler metrics, see [this blog post](https://medium.com/androiddevelopers/jetpack-compose-stability-explained-79c10db270c8).
 

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

@@ -61,7 +61,7 @@ private fun Project.buildComposeMetricsParameters(): List<String> {
     val enableMetricsProvider = project.providers.gradleProperty("enableComposeCompilerMetrics")
     val enableMetrics = (enableMetricsProvider.orNull == "true")
     if (enableMetrics) {
-        val metricsFolder = File(project.rootProject.buildDir, "compose-metrics")
+        val metricsFolder = rootProject.buildDir.resolve("compose-metrics")
         metricParameters.add("-P")
         metricParameters.add(
             "plugin:androidx.compose.compiler.plugins.kotlin:metricsDestination=" + metricsFolder.absolutePath
@@ -71,7 +71,7 @@ private fun Project.buildComposeMetricsParameters(): List<String> {
     val enableReportsProvider = project.providers.gradleProperty("enableComposeCompilerReports")
     val enableReports = (enableReportsProvider.orNull == "true")
     if (enableReports) {
-        val reportsFolder = File(project.rootProject.buildDir, "compose-reports")
+        val reportsFolder = rootProject.buildDir.resolve("compose-reports")
         metricParameters.add("-P")
         metricParameters.add(
             "plugin:androidx.compose.compiler.plugins.kotlin:reportsDestination=" + reportsFolder.absolutePath