allow setting default BCV target values in BCVSettingsPlugin

Author: aSemy

modules/bcv-gradle-plugin/src/main/kotlin/BCVSettingsPlugin.kt

@@ -1,18 +1,35 @@
 package dev.adamko.kotlin.binary_compatibility_validator
 
 import dev.adamko.kotlin.binary_compatibility_validator.internal.globToRegex
+import dev.adamko.kotlin.binary_compatibility_validator.targets.BCVTargetSpec
+import javax.inject.Inject
 import org.gradle.api.Plugin
 import org.gradle.api.Project
 import org.gradle.api.initialization.Settings
+import org.gradle.api.model.ObjectFactory
 import org.gradle.api.provider.SetProperty
 import org.gradle.kotlin.dsl.apply
+import org.gradle.kotlin.dsl.configure
 import org.gradle.kotlin.dsl.create
+import org.gradle.kotlin.dsl.newInstance
 
-abstract class BCVSettingsPlugin : Plugin<Settings> {
+abstract class BCVSettingsPlugin @Inject constructor(
+  private val objects: ObjectFactory
+) : Plugin<Settings> {
 
   override fun apply(settings: Settings) {
-    val extension = settings.extensions.create("bcvSettings", Extension::class).apply {
+    val extension = settings.extensions.create<Extension>(
+      "bcvSettings",
+      objects.newInstance<BCVTargetSpec>(),
+    ).apply {
       ignoredProjects.convention(emptySet())
+
+      defaultTargetValues {
+        enabled.convention(true)
+        ignoredClasses.convention(emptySet())
+        ignoredMarkers.convention(emptySet())
+        ignoredPackages.convention(emptySet())
+      }
     }
 
     settings.gradle.beforeProject {
@@ -22,11 +39,24 @@ abstract class BCVSettingsPlugin : Plugin<Settings> {
         }
       ) {
         project.pluginManager.apply(BCVProjectPlugin::class)
+        project.extensions.configure<BCVProjectExtension> {
+          enabled.convention(extension.defaultTargetValues.enabled)
+          ignoredClasses.convention(extension.defaultTargetValues.ignoredClasses)
+          ignoredMarkers.convention(extension.defaultTargetValues.ignoredMarkers)
+          ignoredPackages.convention(extension.defaultTargetValues.ignoredPackages)
+        }
       }
     }
   }
 
-  interface Extension {
+  abstract class Extension @Inject constructor(
+
+    /**
+     * Set [BCVTargetSpec] values that will be used as defaults for all
+     * [BCVProjectExtension.targets] in subprojects.
+     */
+    val defaultTargetValues: BCVTargetSpec
+  ) {
 
     /**
      * Paths of projects.
@@ -37,6 +67,10 @@ abstract class BCVSettingsPlugin : Plugin<Settings> {
      * - `*` will match zero, or many characters, excluding `:`
      * - `**` will match 0 to many characters, including `:`
      */
-    val ignoredProjects: SetProperty<String>
+    abstract val ignoredProjects: SetProperty<String>
+
+
+    fun defaultTargetValues(configure: BCVTargetSpec.() -> Unit) =
+      defaultTargetValues.configure()
   }
 }