build-logic: migrate Spotless to a convention plugin

build-logic/.gitignore

@@ -0,0 +1 @@
+/build

build-logic/build.gradle.kts

@@ -0,0 +1,3 @@
+plugins { `kotlin-dsl` }
+
+dependencies { implementation(libs.build.spotless) }

build-logic/settings.gradle.kts

@@ -0,0 +1,29 @@
+rootProject.name = "build-logic"
+
+enableFeaturePreview("VERSION_CATALOGS")
+
+pluginManagement {
+  repositories {
+    google()
+    mavenCentral()
+    gradlePluginPortal()
+  }
+}
+
+dependencyResolutionManagement {
+  repositories {
+    google()
+    mavenCentral()
+  }
+  versionCatalogs { create("libs") { from(files("../gradle/libs.versions.toml")) } }
+}
+
+rootProject.name = "build-logic"
+
+enableFeaturePreview("VERSION_CATALOGS")
+
+include("android-plugins")
+
+include("automation-plugins")
+
+include("kotlin-plugins")

build-logic/src/main/kotlin/com.github.android-password-store.spotless.gradle.kts

@@ -0,0 +1,24 @@
+/*
+ * Copyright © 2014-2021 The Android Password Store Authors. All Rights Reserved.
+ * SPDX-License-Identifier: GPL-3.0-only
+ */
+plugins { id("com.diffplug.spotless") }
+
+spotless {
+  kotlin {
+    ktfmt().googleStyle()
+    target("**/*.kt")
+    targetExclude("**/build/")
+  }
+  kotlinGradle {
+    ktfmt().googleStyle()
+    target("**/*.kts")
+  }
+  format("xml") {
+    target("**/*.xml")
+    targetExclude("**/build/", ".idea/")
+    trimTrailingWhitespace()
+    indentWithSpaces()
+    endWithNewline()
+  }
+}

build.gradle.kts

@@ -5,6 +5,5 @@
 plugins {
   `binary-compatibility-validator`
   `aps-plugin`
+  id("com.github.android-password-store.spotless")
 }
-
-allprojects { configureSpotless() }

buildSrc/build.gradle.kts

@@ -34,7 +34,6 @@ gradlePlugin {
 
 dependencies {
   implementation("com.android.tools.build:gradle:7.0.3")
-  implementation("com.diffplug.spotless:spotless-plugin-gradle:5.16.0")
   implementation("com.google.dagger:hilt-android-gradle-plugin:2.40.1")
   implementation("com.squareup.okhttp3:okhttp:4.9.0")
   implementation("com.vanniktech:gradle-maven-publish-plugin:0.18.0")

buildSrc/src/main/java/Spotless.kt

@@ -1,31 +0,0 @@
-/*
- * Copyright © 2014-2021 The Android Password Store Authors. All Rights Reserved.
- * SPDX-License-Identifier: GPL-3.0-only
- */
-
-import com.diffplug.gradle.spotless.SpotlessExtension
-import org.gradle.api.Project
-import org.gradle.kotlin.dsl.apply
-import org.gradle.kotlin.dsl.configure
-
-fun Project.configureSpotless() {
-  apply(plugin = "com.diffplug.spotless")
-  configure<SpotlessExtension> {
-    kotlin {
-      ktfmt().googleStyle()
-      target("**/*.kt")
-      targetExclude("**/build/")
-    }
-    kotlinGradle {
-      ktfmt().googleStyle()
-      target("**/*.kts")
-    }
-    format("xml") {
-      target("**/*.xml")
-      targetExclude("**/build/", ".idea/")
-      trimTrailingWhitespace()
-      indentWithSpaces()
-      endWithNewline()
-    }
-  }
-}

gradle/libs.versions.toml

@@ -11,6 +11,9 @@ kotlin = "1.5.31"
 lifecycle = "2.4.0"
 
 [libraries]
+# Plugins and other build tooling
+build-spotless = "com.diffplug.spotless:spotless-plugin-gradle:5.16.0"
+
 # Kotlin dependencies
 kotlin-coroutines-android = { module = "org.jetbrains.kotlinx:kotlinx-coroutines-android", version.ref = "coroutines" }
 kotlin-coroutines-core = { module = "org.jetbrains.kotlinx:kotlinx-coroutines-core", version.ref = "coroutines" }

settings.gradle.kts

@@ -27,6 +27,7 @@ pluginManagement {
     mavenCentral()
     gradlePluginPortal()
   }
+  includeBuild("build-logic")
 }
 
 dependencyResolutionManagement {