Add support for configuration caching

cashapp · Aug 24, 2024 · b81c705 · b81c705
1 parent 746afe5
commit b81c705
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Showing 8 changed files with 119 additions and 102 deletions.
diff --git a/paparazzi-annotations/api/paparazzi-annotations.api b/paparazzi-annotations/api/paparazzi-annotations.api
@@ -5,26 +5,29 @@ public abstract interface class app/cash/paparazzi/annotations/PaparazziPreviewD
 }
 
 public final class app/cash/paparazzi/annotations/PaparazziPreviewData$Default : app/cash/paparazzi/annotations/PaparazziPreviewData {
-	public fun <init> (Ljava/lang/String;Lkotlin/jvm/functions/Function0;)V
+	public static final field $stable I
+	public fun <init> (Ljava/lang/String;Lkotlin/jvm/functions/Function2;)V
 	public final fun component1 ()Ljava/lang/String;
-	public final fun component2 ()Lkotlin/jvm/functions/Function0;
-	public final fun copy (Ljava/lang/String;Lkotlin/jvm/functions/Function0;)Lapp/cash/paparazzi/annotations/PaparazziPreviewData$Default;
-	public static synthetic fun copy$default (Lapp/cash/paparazzi/annotations/PaparazziPreviewData$Default;Ljava/lang/String;Lkotlin/jvm/functions/Function0;ILjava/lang/Object;)Lapp/cash/paparazzi/annotations/PaparazziPreviewData$Default;
+	public final fun component2 ()Lkotlin/jvm/functions/Function2;
+	public final fun copy (Ljava/lang/String;Lkotlin/jvm/functions/Function2;)Lapp/cash/paparazzi/annotations/PaparazziPreviewData$Default;
+	public static synthetic fun copy$default (Lapp/cash/paparazzi/annotations/PaparazziPreviewData$Default;Ljava/lang/String;Lkotlin/jvm/functions/Function2;ILjava/lang/Object;)Lapp/cash/paparazzi/annotations/PaparazziPreviewData$Default;
 	public fun equals (Ljava/lang/Object;)Z
-	public final fun getComposable ()Lkotlin/jvm/functions/Function0;
+	public final fun getComposable ()Lkotlin/jvm/functions/Function2;
 	public final fun getSnapshotName ()Ljava/lang/String;
 	public fun hashCode ()I
 	public fun toString ()Ljava/lang/String;
 }
 
 public final class app/cash/paparazzi/annotations/PaparazziPreviewData$Empty : app/cash/paparazzi/annotations/PaparazziPreviewData {
+	public static final field $stable I
 	public static final field INSTANCE Lapp/cash/paparazzi/annotations/PaparazziPreviewData$Empty;
 	public fun equals (Ljava/lang/Object;)Z
 	public fun hashCode ()I
 	public fun toString ()Ljava/lang/String;
 }
 
 public final class app/cash/paparazzi/annotations/PaparazziPreviewData$Error : app/cash/paparazzi/annotations/PaparazziPreviewData {
+	public static final field $stable I
 	public fun <init> (Ljava/lang/String;Ljava/lang/String;)V
 	public final fun component1 ()Ljava/lang/String;
 	public final fun component2 ()Ljava/lang/String;

diff --git a/paparazzi-gradle-plugin/src/main/java/app/cash/paparazzi/gradle/PaparazziPlugin.kt b/paparazzi-gradle-plugin/src/main/java/app/cash/paparazzi/gradle/PaparazziPlugin.kt
@@ -87,7 +87,7 @@ public class PaparazziPlugin @Inject constructor(
           else -> error("${androidComponents.javaClass.name} from $plugin is not supported in Paparazzi")
         }
         setupPaparazzi(project, androidComponents)
-        setupPreviewProcessor(project)
+        setupPreviewProcessor(project, androidComponents)
       }
     }
   }
@@ -245,19 +245,19 @@ public class PaparazziPlugin @Inject constructor(
 
   private fun setupPreviewProcessor(
     project: Project,
+    extension: AndroidComponentsExtension<*, *, *>
   ) {
     project.pluginManager.apply(KspGradleSubplugin::class.java)
 
     project.addAnnotationsDependency()
     project.addProcessorDependency()
+    project.registerGeneratePreviewTask(config, extension)
 
     project.afterEvaluate {
       // pass the namespace to the processor
       val kspExtension = project.extensions.getByType(KspExtension::class.java)
       val android = project.extensions.getByType(BaseExtension::class.java)
       kspExtension.arg(KSP_ARG_NAMESPACE, android.packageName())
-
-      project.registerGeneratePreviewTask(config)
     }
   }
 

diff --git a/paparazzi-gradle-plugin/src/main/java/app/cash/paparazzi/gradle/utils/PreviewUtils.kt b/paparazzi-gradle-plugin/src/main/java/app/cash/paparazzi/gradle/utils/PreviewUtils.kt
@@ -2,72 +2,71 @@ package app.cash.paparazzi.gradle.utils
 
 import app.cash.paparazzi.gradle.PaparazziExtension
 import com.android.build.api.variant.AndroidComponentsExtension
-import com.android.build.gradle.LibraryExtension
-import com.android.build.gradle.TestedExtension
+import com.android.build.api.variant.HasUnitTest
 import org.gradle.api.Project
+import org.gradle.language.base.plugins.LifecycleBasePlugin.VERIFICATION_GROUP
 import java.io.File
 import java.util.Locale
 
 private const val TEST_SOURCE_DIR = "build/generated/source/paparazzi"
 private const val KSP_SOURCE_DIR = "build/generated/ksp"
-private const val PREVIEW_DATA_FILE = "paparazziPreviews.kt"
+private const val PREVIEW_DATA_FILE = "PaparazziPreviews.kt"
 private const val PREVIEW_TEST_FILE = "PreviewTests.kt"
 
-private val Project.libraryExtension: LibraryExtension?
-  get() = extensionByTypeOrNull(LibraryExtension::class.java)
-
-private fun <T> Project.extensionByTypeOrNull(cls: Class<T>): T? =
-  try {
-    extensions.getByType(cls)
-  } catch (e: Exception) {
-    null
-  }
-
 internal fun Project.registerGeneratePreviewTask(
-  config: PaparazziExtension
+  config: PaparazziExtension,
+  extension: AndroidComponentsExtension<*, *, *>
 ) {
-  libraryExtension?.let { library ->
-    library.libraryVariants.all { variant ->
-      val namespace = library.namespace
-      val namespaceDir = namespace?.replace(".", "/")
+  extension.onVariants { variant ->
+    val testVariant = (variant as? HasUnitTest)?.unitTest ?: return@onVariants
+    val testVariantSlug = testVariant.name.capitalize()
 
-      val typeName = variant.buildType.name
-      val typeNameCap = typeName.capitalize()
+    val buildType = testVariant.buildType
+    val buildTypeCap = testVariant.buildType?.capitalize()
 
-      val testSourceDir = "$projectDir/$TEST_SOURCE_DIR/${typeName}UnitTest"
-      val previewTestDir = "$testSourceDir/$namespaceDir"
+    val taskName = "paparazziGeneratePreview${testVariantSlug}Kotlin"
+    val taskProvider = tasks.register(taskName) { task ->
+      task.group = VERIFICATION_GROUP
+      task.description = "Generates the preview test class to the test source set for $testVariantSlug"
 
-      library.sourceSets.getByName("test$typeNameCap").java {
-        srcDir(testSourceDir)
-      }
-      println("typeName: ${variant.buildType.name} ${library.namespace} $namespaceDir $typeNameCap")
-      if (config.generatePreviewTestClass.get()) {
-        val taskName = "paparazziGeneratePreview${typeNameCap}UnitTestKotlin"
-        tasks.register(taskName) { task ->
-          task.description = "Generates the preview test class to the test source set for $typeName"
-
-          task.dependsOn("ksp${typeNameCap}Kotlin")
-          task.inputs.file(
-            "$projectDir/$KSP_SOURCE_DIR/$typeName/kotlin/$namespaceDir/$PREVIEW_DATA_FILE"
+      task.dependsOn("ksp${buildTypeCap}Kotlin")
+    }
+
+    val testSourceDir = "$projectDir${File.separator}$TEST_SOURCE_DIR${File.separator}${buildType}UnitTest"
+    testVariant.sources.java?.addStaticSourceDirectory(testSourceDir)
+
+    // test compilation depends on the task
+    project.tasks.named { it == "compile${testVariantSlug}Kotlin" }
+      .configureEach { it.dependsOn(taskProvider) }
+    // run task before processing symbols
+    project.tasks.named { it == "ksp${testVariantSlug}Kotlin" }
+      .configureEach { it.mustRunAfter(taskProvider) }
+
+    gradle.taskGraph.whenReady {
+      taskProvider.configure { task ->
+        // Test variant appends .test to the namespace
+        val namespace = testVariant.namespace.get().replace(".test$".toRegex(), "")
+        val namespaceDir = namespace.replace(".", File.separator)
+        val previewTestDir = "$testSourceDir${File.separator}$namespaceDir"
+
+        task.enabled = config.generatePreviewTestClass.get()
+        task.inputs.file(
+          "$projectDir${File.separator}$KSP_SOURCE_DIR${File.separator}${buildType}${File.separator}kotlin${File.separator}$namespaceDir${File.separator}$PREVIEW_DATA_FILE"
+        )
+        task.enabled = config.generatePreviewTestClass.get()
+
+        task.outputs.dir(previewTestDir)
+        task.outputs.file("$previewTestDir${File.separator}$PREVIEW_TEST_FILE")
+        task.outputs.cacheIf { true }
+
+        task.doLast {
+          File(previewTestDir).mkdirs()
+          File(previewTestDir, PREVIEW_TEST_FILE).writeText(
+            buildString {
+              appendLine("package $namespace")
+              append(PREVIEW_TEST_SOURCE)
+            }
           )
-          task.outputs.dir(previewTestDir)
-          task.outputs.file("$previewTestDir/$PREVIEW_TEST_FILE")
-          task.outputs.cacheIf { true }
-
-          // test compilation depends on the task
-          tasks.findByName("compile${typeNameCap}UnitTestKotlin")?.dependsOn(taskName)
-          // run task before processing symbols
-          tasks.findByName("ksp${typeNameCap}UnitTestKotlin")?.mustRunAfter(taskName)
-
-          task.doLast {
-            File(previewTestDir).mkdirs()
-            File(previewTestDir, PREVIEW_TEST_FILE).writeText(
-              buildString {
-                appendLine("package $namespace")
-                append(PREVIEW_TEST_SOURCE)
-              }
-            )
-          }
         }
       }
     }

diff --git a/paparazzi-gradle-plugin/src/test/java/app/cash/paparazzi/gradle/PaparazziPluginTest.kt b/paparazzi-gradle-plugin/src/test/java/app/cash/paparazzi/gradle/PaparazziPluginTest.kt
@@ -1410,7 +1410,7 @@ class PaparazziPluginTest {
     val generatedPreviewsDir = File(fixtureRoot, "build/generated/ksp/debug/kotlin/app/cash/paparazzi/plugin/test/")
     assertThat(
       generatedPreviewsDir.listFiles()?.any {
-        it.name == "paparazziPreviews.kt"
+        it.name == "PaparazziPreviews.kt"
       }
     ).isTrue()
 
@@ -1463,6 +1463,50 @@ class PaparazziPluginTest {
     assertThat(generatedPreviewTestDir.exists()).isFalse()
   }
 
+  @Test
+  fun previewAnnotationSample() {
+    val fixtureRoot = File("src/test/projects/preview-annotation-sample")
+
+    val result = gradleRunner
+      .forwardOutput()
+      .withArguments("verifyPaparazziDebug", "--stacktrace")
+      .runFixture(fixtureRoot) { buildAndFail() } // Currently fails because of preview parameter usage
+
+    assertThat(result.task(":paparazziGeneratePreviewDebugUnitTestKotlin")).isNotNull()
+
+    val generatedPreviewTestDir = File(fixtureRoot, "build/generated/source/paparazzi/debugUnitTest/app/cash/paparazzi/plugin/test/")
+    assertThat(generatedPreviewTestDir.exists()).isTrue()
+  }
+
+  @Test
+  fun previewAnnotationSampleConfigCache() {
+    val fixtureRoot = File("src/test/projects/preview-annotation-sample-configuration-cache")
+    fixtureRoot.resolve("build").apply {
+      deleteRecursively()
+      registerForDeletionOnExit()
+    }
+    fixtureRoot.resolve("build-cache").registerForDeletionOnExit()
+
+    val result = gradleRunner
+      .forwardOutput()
+      .withArguments(
+        "testDebugUnitTest", "--stacktrace", "--build-cache", "--configuration-cache"
+      )
+      .runFixture(fixtureRoot) { build() }
+    assertThat(result.task(":paparazziGeneratePreviewDebugUnitTestKotlin")?.outcome).isEqualTo(SUCCESS)
+    assertThat(result.task(":testDebugUnitTest")?.outcome).isEqualTo(SUCCESS)
+
+    fixtureRoot.resolve("build").deleteRecursively()
+
+    val result2 = gradleRunner
+      .forwardOutput()
+      .withArguments("testDebugUnitTest", "--stacktrace", "--build-cache", "--configuration-cache")
+      .runFixture(fixtureRoot) { build() }
+
+    assertThat(result2.task(":paparazziGeneratePreviewDebugUnitTestKotlin")?.outcome).isEqualTo(FROM_CACHE)
+    assertThat(result2.task(":testDebugUnitTest")?.outcome).isEqualTo(SUCCESS)
+  }
+
   @Test
   fun disabledUnitTestVariant() {
     val fixtureRoot = File("src/test/projects/disabled-unit-test-variant")

diff --git a/...le-plugin/src/test/projects/preview-annotation-sample-configuration-cache/settings.gradle b/...le-plugin/src/test/projects/preview-annotation-sample-configuration-cache/settings.gradle
@@ -0,0 +1,7 @@
+apply from: '../test.settings.gradle'
+
+buildCache {
+  local {
+    directory = new File(rootDir, 'build-cache')
+  }
+}
diff --git a/...sample-configuration-cache/src/main/java/app/cash/paparazzi/plugin/test/HelloPaparazzi.kt b/...sample-configuration-cache/src/main/java/app/cash/paparazzi/plugin/test/HelloPaparazzi.kt
@@ -1,12 +1,8 @@
 package app.cash.paparazzi.plugin.test
 
-import android.content.res.Configuration
 import androidx.compose.material.Text
 import androidx.compose.runtime.Composable
 import androidx.compose.ui.tooling.preview.Preview
-import androidx.compose.ui.tooling.preview.PreviewParameter
-import androidx.compose.ui.tooling.preview.PreviewParameterProvider
-import androidx.compose.ui.tooling.preview.Wallpapers
 import app.cash.paparazzi.annotations.Paparazzi
 
 @Paparazzi
@@ -15,36 +11,3 @@ import app.cash.paparazzi.annotations.Paparazzi
 fun HelloPaparazzi() {
   Text("Hello, Paparazzi!")
 }
-
-@Paparazzi
-@Preview
-@Composable
-fun HelloPaparazziParameterized(
-  @PreviewParameter(provider = PreviewData::class) text: String,
-) {
-  Text(text)
-}
-
-@Paparazzi
-@Preview(
-  name = "PreviewConfig",
-  group = "Previews",
-  device = "id:Nexus 6",
-  apiLevel = 33,
-  showSystemUi = true,
-  uiMode = Configuration.UI_MODE_NIGHT_YES or Configuration.UI_MODE_TYPE_NORMAL,
-  wallpaper = Wallpapers.RED_DOMINATED_EXAMPLE,
-  showBackground = true,
-  fontScale = 1.5f
-)
-@Composable
-fun HelloPaparazziPreviewConfig() {
-  Text("Hello Paparazzi Preview Config!")
-}
-
-object PreviewData : PreviewParameterProvider<String> {
-  override val values: Sequence<String> = sequenceOf(
-    "Hello, Paparazzi One!",
-    "Hello, Paparazzi Two!",
-  )
-}
diff --git a/.../preview-annotation-sample/src/main/java/app/cash/paparazzi/plugin/test/HelloPaparazzi.kt b/.../preview-annotation-sample/src/main/java/app/cash/paparazzi/plugin/test/HelloPaparazzi.kt
@@ -20,7 +20,7 @@ fun HelloPaparazzi() {
 @Preview
 @Composable
 fun HelloPaparazziParameterized(
-  @PreviewParameter(provider = PreviewData::class) text: String,
+  @PreviewParameter(provider = PreviewData::class) text: String
 ) {
   Text(text)
 }
@@ -45,6 +45,6 @@ fun HelloPaparazziPreviewConfig() {
 object PreviewData : PreviewParameterProvider<String> {
   override val values: Sequence<String> = sequenceOf(
     "Hello, Paparazzi One!",
-    "Hello, Paparazzi Two!",
+    "Hello, Paparazzi Two!"
   )
 }
diff --git a/...zzi-preview-processor/src/main/java/app/cash/paparazzi/preview/processor/PaparazziPoet.kt b/...zzi-preview-processor/src/main/java/app/cash/paparazzi/preview/processor/PaparazziPoet.kt
@@ -19,17 +19,18 @@ internal object PaparazziPoet {
       emptyList()
     } else {
       listOf(
-        buildAnnotationsFile("paparazziPreviews", functions, env)
+        buildAnnotationsFile("PaparazziPreviews", "paparazziPreviews", functions, env)
       )
     }
 
   @Suppress("SameParameterValue")
   private fun buildAnnotationsFile(
+    fileName: String,
     propertyName: String,
     functions: Sequence<KSFunctionDeclaration>,
     env: EnvironmentOptions
   ) =
-    FileSpec.scriptBuilder(propertyName, env.namespace)
+    FileSpec.scriptBuilder(fileName, env.namespace)
       .addCode(
         buildCodeBlock {
           addStatement("internal val %L = listOf<%L.PaparazziPreviewData>(", propertyName, PACKAGE_NAME)