Introduce compose preview scanner

app-android/build.gradle.kts

@@ -113,4 +113,5 @@ dependencies {
     implementation(libs.firebaseDynamicLinks)
     debugImplementation(projects.core.testingManifest)
     testImplementation(projects.core.testing)
+    testImplementation(libs.composablePreviewScanner)
 }

app-android/src/main/res/values/splash_theme.xml

@@ -5,7 +5,7 @@
         <item name="windowSplashScreenAnimatedIcon">@drawable/splash_icon</item>
         <item name="windowSplashScreenBackground">@android:color/white</item>
         <item name="windowSplashScreenAnimationDuration">5000</item>
-        <item name="postSplashScreenTheme">@style/Theme.App</item>
+        <item name="postSplashScreenTheme">@style/Theme.KaigiApp</item>
         <item name="android:windowSplashScreenBrandingImage" tools:targetApi="s">@drawable/splash_branding_image</item>
     </style>
 </resources>

app-android/src/test/java/io/github/droidkaigi/confsched/PreviewTest.kt

@@ -1,143 +1,50 @@
 package io.github.droidkaigi.confsched
 
 import android.content.res.Configuration
-import android.os.LocaleList
-import androidx.compose.runtime.Composable
-import androidx.compose.runtime.CompositionLocalProvider
-import androidx.compose.ui.platform.LocalConfiguration
-import com.airbnb.android.showkase.models.Showkase
-import com.airbnb.android.showkase.models.ShowkaseBrowserComponent
 import com.github.takahirom.roborazzi.DEFAULT_ROBORAZZI_OUTPUT_DIR_PATH
 import com.github.takahirom.roborazzi.captureRoboImage
-import io.github.droidkaigi.confsched.designsystem.preview.MultiLanguagePreviewDefinition
-import io.github.droidkaigi.confsched.designsystem.preview.MultiThemePreviewDefinition
-import io.github.droidkaigi.confsched.designsystem.preview.ShowkaseMultiplePreviewsWorkaround
 import org.junit.Test
 import org.junit.runner.RunWith
 import org.robolectric.ParameterizedRobolectricTestRunner
-import java.util.Locale
+import org.robolectric.RuntimeEnvironment
+import sergio.sastre.composable.preview.scanner.android.AndroidComposablePreviewScanner
+import sergio.sastre.composable.preview.scanner.android.AndroidPreviewInfo
+import sergio.sastre.composable.preview.scanner.core.preview.ComposablePreview
 
 @RunWith(ParameterizedRobolectricTestRunner::class)
 class PreviewTest(
-    val showkaseBrowserComponent: ShowkaseBrowserComponent,
+    private val preview: ComposablePreview<AndroidPreviewInfo>,
 ) {
+    object RobolectricPreviewInfosApplier {
+        fun applyFor(preview: ComposablePreview<AndroidPreviewInfo>) {
+            val uiMode =
+                when (preview.previewInfo.uiMode and Configuration.UI_MODE_NIGHT_MASK == Configuration.UI_MODE_NIGHT_YES) {
+                    true -> "+night"
+                    false -> "+notnight"
+                }
+            RuntimeEnvironment.setQualifiers(uiMode)
+        }
+    }
 
     @Test
     fun previewScreenshot() {
         val filePath =
-            DEFAULT_ROBORAZZI_OUTPUT_DIR_PATH + "/" + showkaseBrowserComponent.componentKey + ".png"
+            DEFAULT_ROBORAZZI_OUTPUT_DIR_PATH + "/" + preview.methodName + ".png"
+        RobolectricPreviewInfosApplier.applyFor(preview)
         captureRoboImage(
-            filePath,
+            filePath = filePath,
         ) {
-            ProvidesPreviewValues(group = showkaseBrowserComponent.group, componentKey = showkaseBrowserComponent.componentKey) {
-                showkaseBrowserComponent.component()
-            }
-        }
-    }
-
-    @Suppress("TestFunctionName")
-    @ShowkaseMultiplePreviewsWorkaround
-    @Composable
-    private fun ProvidesPreviewValues(group: String, componentKey: String, content: @Composable () -> Unit) {
-        val appliers = arrayListOf<(Configuration) -> Unit>()
-
-        if (isCustomGroup(group = group)) {
-            val previewValue = extractPreviewValues(group = group, componentKey)
-
-            when (group) {
-                MultiLanguagePreviewDefinition.Group -> {
-                    appliers += { c ->
-                        c.setLocales(newLocales(baseLocales = c.locales, previewValue = previewValue))
-                    }
-                }
-                MultiThemePreviewDefinition.Group -> {
-                    appliers += { c ->
-                        c.uiMode = newUiMode(baseUiMode = c.uiMode, previewValue = previewValue)
-                    }
-                }
-            }
-        }
-
-        val newConfiguration = appliers.fold(LocalConfiguration.current) { c, a -> c.apply(a) }
-
-        CompositionLocalProvider(LocalConfiguration provides newConfiguration) {
-            // Notify locale changes to lang() through the following invocation.
-            LocaleList.setDefault(LocalConfiguration.current.locales)
-
-            content()
-        }
-    }
-
-    /**
-     * Depends on the naming rule from Showkase.
-     * We must not include "_${group}_" in an original preview function name.
-     */
-    @ShowkaseMultiplePreviewsWorkaround
-    private fun extractPreviewValues(group: String, componentKey: String): String {
-        val components = componentKey.split("_")
-
-        // _${group_ is expected here
-        val groupIndex = requireNotNull(components.indexOf(group).takeIf { it > 0 }) {
-            "Failed to extract a preview value for $group: $group is not found in $components"
-        }
-
-        val modifiedPreviewName = requireNotNull(components.getOrNull(groupIndex + 1)) {
-            "Failed to extract a preview value for $group: $components is unexpectedly aligned"
-        }
-
-        // ${preview_name}_${preview_value}_${...others}
-        val match = requireNotNull(Regex("\\w+-([\\w-]+)-[_\\w]+").matchEntire(modifiedPreviewName)) {
-            "Failed to extract a preview value for $group: no value was found in $modifiedPreviewName"
-        }
-
-        return requireNotNull(match.groupValues.getOrNull(1)) {
-            "Failed to extract a preview value for $group: this may be a development issue"
+            preview()
         }
     }
 
-    @ShowkaseMultiplePreviewsWorkaround
-    private fun newLocales(baseLocales: LocaleList, previewValue: String): LocaleList {
-        val locale = when (previewValue) {
-            MultiLanguagePreviewDefinition.English.Name -> {
-                MultiLanguagePreviewDefinition.English.Locale
-            }
-            MultiLanguagePreviewDefinition.Japanese.Name -> {
-                MultiLanguagePreviewDefinition.Japanese.Locale
-            }
-            else -> return baseLocales
-        }
-
-        return LocaleList(Locale.getAvailableLocales().first { it.toString() == locale })
-    }
-
-    @ShowkaseMultiplePreviewsWorkaround
-    private fun newUiMode(baseUiMode: Int, previewValue: String): Int {
-        val nightMode = when (previewValue) {
-            // FIXME
-//            MultiThemePreviewDefinition.DarkMode.Name -> {
-//                MultiThemePreviewDefinition.DarkMode.UiMode
-//            }
-//            MultiThemePreviewDefinition.LightMode.Name -> {
-//                MultiThemePreviewDefinition.LightMode.UiMode
-//            }
-            else -> baseUiMode
-        }
-
-        val currentNightMode = baseUiMode and Configuration.UI_MODE_NIGHT_MASK
-        return baseUiMode xor currentNightMode or nightMode
-    }
-
     companion object {
-        fun isCustomGroup(group: String): Boolean {
-            return group != "Default Group"
-        }
-
         @ParameterizedRobolectricTestRunner.Parameters
         @JvmStatic
-        fun components(): Iterable<Array<Any?>> {
-            return Showkase.getMetadata().componentList.map { showkaseBrowserComponent ->
-                arrayOf(showkaseBrowserComponent)
-            }
+        fun components(): List<ComposablePreview<AndroidPreviewInfo>> {
+            return AndroidComposablePreviewScanner()
+                .scanPackageTrees("io.github.droidkaigi.confsched")
+                .getPreviews()
         }
     }
 }

build-logic/build.gradle.kts

@@ -95,10 +95,6 @@ gradlePlugin {
             id = "droidkaigi.primitive.kmp.android.hilt"
             implementationClass = "io.github.droidkaigi.confsched.primitive.KmpAndroidHiltPlugin"
         }
-        register("kotlinMppAndroidShowkase") {
-            id = "droidkaigi.primitive.kmp.android.showkase"
-            implementationClass = "io.github.droidkaigi.confsched.primitive.KmpAndroidShowkasePlugin"
-        }
         register("kotlinMppKotlinSerialization") {
             id = "droidkaigi.primitive.kmp.serialization"
             implementationClass = "io.github.droidkaigi.confsched.primitive.KotlinSerializationPlugin"

build-logic/src/main/kotlin/io/github/droidkaigi/confsched/primitive/AndroidRoborazziPlugin.kt

@@ -31,9 +31,6 @@ class AndroidRoborazziPlugin : Plugin<Project> {
                 testImplementation(libs.library("androidxTestExtJunit"))
                 testImplementation(libs.library("roborazzi"))
                 testImplementation(libs.library("roborazziCompose"))
-                // For preview screenshot tests
-                implementation(libs.library("showkaseRuntime"))
-                ksp(libs.library("showkaseProcessor"))
             }
         }
     }

build-logic/src/main/kotlin/io/github/droidkaigi/confsched/primitive/KmpRoborazziPlugin.kt

@@ -31,18 +31,7 @@ class KmpRoborazziPlugin : Plugin<Project> {
             kotlin {
                 if (plugins.hasPlugin("com.android.library")) {
                     sourceSets.getByName("androidUnitTest") {
-                        val kspConfiguration = configurations["kspAndroid"]
-                        kspConfiguration.dependencies.add(
-                            libs.library("showkaseProcessor").let {
-                                DefaultExternalModuleDependency(
-                                    it.module.group,
-                                    it.module.name,
-                                    it.versionConstraint.requiredVersion
-                                )
-                            }
-                        )
                         dependencies {
-                            implementation(libs.library("showkaseRuntime"))
                             implementation(libs.library("androidxTestEspressoEspressoCore"))
                             implementation(libs.library("junit"))
                             implementation(libs.library("robolectric"))

build-logic/src/main/kotlin/io/github/droidkaigi/confsched/primitive/KoverEntryPointPlugin.kt

@@ -21,7 +21,6 @@ class KoverEntryPointPlugin : Plugin<Project> {
                 filters {
                     excludes {
                         packages(
-                            "com.airbnb.android.showkase",
                             "dagger.hilt.*",
                             "hilt_aggregated_deps",
                         )

core/designsystem/build.gradle.kts

@@ -5,7 +5,6 @@ plugins {
     id("droidkaigi.primitive.kmp.compose")
     id("droidkaigi.primitive.kmp.android.hilt")
     id("droidkaigi.primitive.detekt")
-    id("droidkaigi.primitive.kmp.android.showkase")
 }
 
 android.namespace = "io.github.droidkaigi.confsched.core.designsystem"

gradle/libs.versions.toml

@@ -29,7 +29,6 @@ ktlint = "0.49.1"
 kotlinxSerialization = "1.6.3"
 ktor = "2.3.10"
 roborazzi = "1.20.0"
-showkase = "1.0.0-beta18"
 ksp = "1.9.24-1.0.20"
 firebaseBom = "33.1.0"
 multiplatformFirebase = "1.8.1"
@@ -45,6 +44,7 @@ molecule = "1.4.1"
 kover = "0.7.6"
 androidxLifecycleProcess = "2.8.2"
 skie = "0.8.2"
+composablePreviewScanner = "0.1.1"
 
 [libraries]
 androidGradlePlugin = { group = "com.android.tools.build", name = "gradle", version.ref = "androidGradlePlugin" }
@@ -168,8 +168,7 @@ roborazzi = { module = "io.github.takahirom.roborazzi:roborazzi", version.ref =
 roborazziCompose = { module = "io.github.takahirom.roborazzi:roborazzi-compose", version.ref = "roborazzi" }
 roborazziIos = { module = "io.github.takahirom.roborazzi:roborazzi-compose-ios", version.ref = "roborazzi" }
 roborazziRule = { module = "io.github.takahirom.roborazzi:roborazzi-junit-rule", version.ref = "roborazzi" }
-showkaseRuntime = { group = "com.airbnb.android", name = "showkase", version.ref = "showkase" }
-showkaseProcessor = { group = "com.airbnb.android", name = "showkase-processor", version.ref = "showkase" }
+composablePreviewScanner = { module = "com.github.sergio-sastre.ComposablePreviewScanner:android", version.ref = "composablePreviewScanner" }
 
 [plugins]
 androidGradlePlugin = { id = "com.android.application", version.ref = "androidGradlePlugin" }

settings.gradle.kts

@@ -15,6 +15,7 @@ dependencyResolutionManagement {
         maven {
             url = uri("https://maven.pkg.jetbrains.space/public/p/compose/dev/")
         }
+        maven { url = uri("https://jitpack.io") }
     }
 }
 rootProject.name = "conference-app-2024"