Add test project with Android library and application

... in order to test incremental Kotlin compilation
if KSP is applied in the library, to address issue #647.

Test: AndroidIncrementalIT

12 files changed, 258 insertions, 0 deletions

diff --git a/gradle-plugin/src/main/kotlin/com/google/devtools/ksp/gradle/KspSubplugin.kt b/gradle-plugin/src/main/kotlin/com/google/devtools/ksp/gradle/KspSubplugin.kt
index f14534ab..b273a6ce 100644
--- a/gradle-plugin/src/main/kotlin/com/google/devtools/ksp/gradle/KspSubplugin.kt
+++ b/gradle-plugin/src/main/kotlin/com/google/devtools/ksp/gradle/KspSubplugin.kt
@@ -419,6 +419,9 @@ abstract class KspTaskJvm : KotlinCompile(KotlinJvmOptionsImpl()), KspTask {
         kotlinCompile: AbstractKotlinCompile<*>,
     ) {
         Configurator<KspTaskJvm>(kotlinCompilation).configure(this)
+        // Assign moduleName different from kotlin compilation to work around https://github.com/google/ksp/issues/647
+        // This will not be necessary once https://youtrack.jetbrains.com/issue/KT-45777 lands
+        this.moduleName.set(kotlinCompile.moduleName.map { "$it-ksp" })
         kotlinCompile as KotlinCompile
         val providerFactory = kotlinCompile.project.providers
         compileKotlinArgumentsContributor.set(
diff --git a/integration-tests/src/test/kotlin/com/google/devtools/ksp/test/AndroidIncrementalIT.kt b/integration-tests/src/test/kotlin/com/google/devtools/ksp/test/AndroidIncrementalIT.kt
new file mode 100644
index 00000000..3bea21d7
--- /dev/null
+++ b/integration-tests/src/test/kotlin/com/google/devtools/ksp/test/AndroidIncrementalIT.kt
@@ -0,0 +1,61 @@
+/*
+ * Copyright 2020 Google LLC
+ * Copyright 2010-2020 JetBrains s.r.o. and Kotlin Programming Language contributors.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package com.google.devtools.ksp.test
+
+import com.google.devtools.ksp.test.fixtures.BuildResultFixture
+import org.gradle.testkit.runner.GradleRunner
+import org.gradle.testkit.runner.TaskOutcome
+import org.junit.Assert
+import org.junit.Rule
+import org.junit.Test
+
+class AndroidIncrementalIT {
+    @Rule
+    @JvmField
+    val project: TemporaryTestProject = TemporaryTestProject("playground-android-multi", "playground")
+
+    @Test
+    fun testPlaygroundAndroid() {
+        val gradleRunner = GradleRunner.create().withProjectDir(project.root)
+
+        gradleRunner.withArguments(
+            "clean", ":application:compileDebugKotlin", "--configuration-cache-problems=warn", "--debug", "--stacktrace"
+        ).build().let { result ->
+            Assert.assertEquals(TaskOutcome.SUCCESS, result.task(":workload:compileDebugKotlin")?.outcome)
+            Assert.assertEquals(TaskOutcome.SUCCESS, result.task(":application:compileDebugKotlin")?.outcome)
+        }
+
+        project.root.resolve("workload/src/main/java/com/example/A.kt").also {
+            it.appendText(
+                """
+
+                class Unused
+                """.trimIndent()
+            )
+        }
+
+        gradleRunner.withArguments(
+            ":application:compileDebugKotlin", "--configuration-cache-problems=warn", "--debug", "--stacktrace"
+        ).build().let { result ->
+            Assert.assertEquals(
+                setOf("workload/src/main/java/com/example/A.kt"),
+                BuildResultFixture(result).compiledKotlinSources,
+            )
+        }
+    }
+}
diff --git a/integration-tests/src/test/kotlin/com/google/devtools/ksp/test/fixtures/BuildResultFixture.kt b/integration-tests/src/test/kotlin/com/google/devtools/ksp/test/fixtures/BuildResultFixture.kt
new file mode 100644
index 00000000..cb66ea1b
--- /dev/null
+++ b/integration-tests/src/test/kotlin/com/google/devtools/ksp/test/fixtures/BuildResultFixture.kt
@@ -0,0 +1,34 @@
+/*
+ * Copyright 2020 Google LLC
+ * Copyright 2010-2020 JetBrains s.r.o. and Kotlin Programming Language contributors.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package com.google.devtools.ksp.test.fixtures
+
+import org.gradle.testkit.runner.BuildResult
+
+private val compileKotlinSrcs = Regex("\\[KOTLIN\\] compile iteration: ([^\\r\\n]*)")
+
+class BuildResultFixture(private val result: BuildResult) {
+
+    /** Get all compiled Kotlin sources in the current build. */
+    val compiledKotlinSources by lazy {
+        compileKotlinSrcs.findAll(result.output)
+            .asIterable()
+            .flatMap {
+                it.groups[1]!!.value.split(", ")
+            }.toSet()
+    }
+}
diff --git a/integration-tests/src/test/resources/playground-android-multi/application/build.gradle.kts b/integration-tests/src/test/resources/playground-android-multi/application/build.gradle.kts
new file mode 100644
index 00000000..7f328d2c
--- /dev/null
+++ b/integration-tests/src/test/resources/playground-android-multi/application/build.gradle.kts
@@ -0,0 +1,31 @@
+val testRepo: String by project
+
+plugins {
+    id("com.android.application")
+    kotlin("android")
+}
+
+version = "1.0-SNAPSHOT"
+
+repositories {
+    maven(testRepo)
+    mavenCentral()
+    maven("https://maven.pkg.jetbrains.space/kotlin/p/kotlin/bootstrap/")
+    jcenter()
+}
+
+dependencies {
+    implementation(kotlin("stdlib"))
+    implementation(project(":workload"))
+}
+
+android {
+    compileSdkVersion(30)
+    defaultConfig {
+        applicationId = "org.gradle.kotlin.dsl.samples.androidstudio"
+        minSdkVersion(30)
+        targetSdkVersion(30)
+        versionCode = 1
+        versionName = "1.0"
+    }
+}
diff --git a/integration-tests/src/test/resources/playground-android-multi/application/src/main/AndroidManifest.xml b/integration-tests/src/test/resources/playground-android-multi/application/src/main/AndroidManifest.xml
new file mode 100644
index 00000000..81a4ba30
--- /dev/null
+++ b/integration-tests/src/test/resources/playground-android-multi/application/src/main/AndroidManifest.xml
@@ -0,0 +1,4 @@
+<?xml version="1.0" encoding="utf-8"?>
+<manifest xmlns:android="http://schemas.android.com/apk/res/android"
+    package="com.example.myapplication">
+</manifest>
\ No newline at end of file
diff --git a/integration-tests/src/test/resources/playground-android-multi/application/src/main/java/com/example/application/Foo.kt b/integration-tests/src/test/resources/playground-android-multi/application/src/main/java/com/example/application/Foo.kt
new file mode 100644
index 00000000..4f164e18
--- /dev/null
+++ b/integration-tests/src/test/resources/playground-android-multi/application/src/main/java/com/example/application/Foo.kt
@@ -0,0 +1,3 @@
+package com.example.application
+
+class Foo
diff --git a/integration-tests/src/test/resources/playground-android-multi/build.gradle.kts b/integration-tests/src/test/resources/playground-android-multi/build.gradle.kts
new file mode 100644
index 00000000..b349665d
--- /dev/null
+++ b/integration-tests/src/test/resources/playground-android-multi/build.gradle.kts
@@ -0,0 +1,29 @@
+buildscript {
+    val testRepo: String by project
+
+    repositories {
+        maven(testRepo)
+        mavenCentral()
+        maven("https://maven.pkg.jetbrains.space/kotlin/p/kotlin/bootstrap/")
+        jcenter()
+        google()
+    }
+}
+
+plugins {
+    id("com.android.application") apply false
+    kotlin("android") apply false
+    id("com.google.devtools.ksp") apply false
+    id("com.android.library") apply false
+}
+
+allprojects {
+    val testRepo: String by project
+    repositories {
+        maven(testRepo)
+        mavenCentral()
+        maven("https://maven.pkg.jetbrains.space/kotlin/p/kotlin/bootstrap/")
+        jcenter()
+        google()
+    }
+}
diff --git a/integration-tests/src/test/resources/playground-android-multi/gradle.properties b/integration-tests/src/test/resources/playground-android-multi/gradle.properties
new file mode 100644
index 00000000..b3c7a033
--- /dev/null
+++ b/integration-tests/src/test/resources/playground-android-multi/gradle.properties
@@ -0,0 +1 @@
+org.gradle.jvmargs=-Xmx2048M
diff --git a/integration-tests/src/test/resources/playground-android-multi/settings.gradle.kts b/integration-tests/src/test/resources/playground-android-multi/settings.gradle.kts
new file mode 100644
index 00000000..2daf2ddf
--- /dev/null
+++ b/integration-tests/src/test/resources/playground-android-multi/settings.gradle.kts
@@ -0,0 +1,27 @@
+pluginManagement {
+    val kotlinVersion: String by settings
+    val kspVersion: String by settings
+    val testRepo: String by settings
+    val agpVersion: String by settings
+    plugins {
+        id("com.google.devtools.ksp") version kspVersion apply false
+        kotlin("jvm") version kotlinVersion apply false
+        kotlin("android") version kotlinVersion apply false
+        id("com.android.application") version agpVersion apply false
+        id("com.android.library") version agpVersion apply false
+    }
+    repositories {
+        maven(testRepo)
+        gradlePluginPortal()
+        google()
+        jcenter()
+        mavenCentral()
+        maven("https://maven.pkg.jetbrains.space/kotlin/p/kotlin/bootstrap/")
+    }
+}
+
+rootProject.name = "playground"
+
+include(":application")
+include(":workload")
+include(":test-processor")
diff --git a/integration-tests/src/test/resources/playground-android-multi/test-processor/build.gradle.kts b/integration-tests/src/test/resources/playground-android-multi/test-processor/build.gradle.kts
new file mode 100644
index 00000000..75c6c7c5
--- /dev/null
+++ b/integration-tests/src/test/resources/playground-android-multi/test-processor/build.gradle.kts
@@ -0,0 +1,25 @@
+val kspVersion: String by project
+val testRepo: String by project
+
+plugins {
+    kotlin("jvm")
+}
+
+group = "com.example"
+version = "1.0-SNAPSHOT"
+
+repositories {
+    maven(testRepo)
+    mavenCentral()
+    maven("https://maven.pkg.jetbrains.space/kotlin/p/kotlin/bootstrap/")
+}
+
+dependencies {
+    implementation(kotlin("stdlib"))
+    implementation("com.squareup:javapoet:1.12.1")
+    implementation("com.google.devtools.ksp:symbol-processing-api:$kspVersion")
+}
+
+sourceSets.main {
+    java.srcDirs("src/main/kotlin")
+}
diff --git a/integration-tests/src/test/resources/playground-android-multi/workload/build.gradle.kts b/integration-tests/src/test/resources/playground-android-multi/workload/build.gradle.kts
new file mode 100644
index 00000000..518ed04e
--- /dev/null
+++ b/integration-tests/src/test/resources/playground-android-multi/workload/build.gradle.kts
@@ -0,0 +1,36 @@
+val testRepo: String by project
+
+plugins {
+    // DO NOT CHANGE THE ORDER.
+    id("com.google.devtools.ksp")
+    id("com.android.library")
+    kotlin("android")
+}
+
+version = "1.0-SNAPSHOT"
+
+repositories {
+    maven(testRepo)
+    mavenCentral()
+    maven("https://maven.pkg.jetbrains.space/kotlin/p/kotlin/bootstrap/")
+    jcenter()
+}
+
+dependencies {
+    implementation(kotlin("stdlib"))
+    implementation(project(":test-processor"))
+    ksp(project(":test-processor"))
+}
+
+android {
+    compileSdkVersion(30)
+    defaultConfig {
+        minSdkVersion(30)
+        targetSdkVersion(30)
+    }
+}
+
+ksp {
+    arg("option1", "value1")
+    arg("option2", "value2")
+}
diff --git a/integration-tests/src/test/resources/playground-android-multi/workload/src/main/AndroidManifest.xml b/integration-tests/src/test/resources/playground-android-multi/workload/src/main/AndroidManifest.xml
new file mode 100644
index 00000000..522bce61
--- /dev/null
+++ b/integration-tests/src/test/resources/playground-android-multi/workload/src/main/AndroidManifest.xml
@@ -0,0 +1,4 @@
+<?xml version="1.0" encoding="utf-8"?>
+<manifest xmlns:android="http://schemas.android.com/apk/res/android"
+    package="com.example.mylibrary">
+</manifest>
\ No newline at end of file