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Add generated files to target source sets
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instead of creating source sets and making default source sets depend on
them.

This avoids breaking kotlin.mpp.applyDefaultHierarchyTemplate.

Common source sets are untouched, because otherwise the generated
sources for them would be observed by downstream compilations and be
inconsistent with current KMP build scheme.

Alternatively, we could add all generated files, common or target,
directly to compilation tasks and keep default source sets untouched.
The drawback is that generated files won't be seen by IDE. We would have
to build IDE plugins and implement our own model builder to register
generated files to IDE.

TODO: Add common source sets to their corresponding compilation for the
new KMP build scheme.
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@ting-yuan
ting-yuan committed Oct 24, 2023
1 parent dbcc7a0 commit 582ccd0
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Showing 3 changed files with 48 additions and 75 deletions.
23 changes: 14 additions & 9 deletions gradle-plugin/src/main/kotlin/com/google/devtools/ksp/gradle/KspAATask.kt
View file
Original file line number Diff line number Diff line change
Expand Up @@ -30,7 +30,6 @@ import org.gradle.workers.WorkParameters
import org.gradle.workers.WorkerExecutor
import org.jetbrains.kotlin.gradle.dsl.KotlinJvmCompilerOptions
import org.jetbrains.kotlin.gradle.plugin.KotlinCompilation
import org.jetbrains.kotlin.gradle.plugin.KotlinSourceSet
import org.jetbrains.kotlin.gradle.plugin.mpp.KotlinCommonCompilation
import org.jetbrains.kotlin.gradle.tasks.AbstractKotlinCompileTool
import java.io.ByteArrayOutputStream
Expand Down Expand Up @@ -71,7 +70,6 @@ abstract class KspAATask @Inject constructor(
kotlinCompilation: KotlinCompilation<*>,
kotlinCompileProvider: TaskProvider<AbstractKotlinCompileTool<*>>,
processorClasspath: Configuration,
kspGeneratedSourceSet: KotlinSourceSet,
kspExtension: KspExtension,
): TaskProvider<KspAATask> {
val project = kotlinCompilation.target.project
Expand All @@ -92,12 +90,19 @@ abstract class KspAATask @Inject constructor(
kspAATask.kspConfig.let { cfg ->
cfg.processorClasspath.from(processorClasspath)
cfg.moduleName.value(kotlinCompilation.defaultSourceSet.name)
kotlinCompilation.allKotlinSourceSetsObservable
.forAll { sourceSet ->
if (sourceSet == kspGeneratedSourceSet) return@forAll
cfg.sourceRoots.from(sourceSet.kotlin)
cfg.javaSourceRoots.from(sourceSet.kotlin)
val kotlinOutputDir = KspGradleSubplugin.getKspKotlinOutputDir(project, sourceSetName, target)
val javaOutputDir = KspGradleSubplugin.getKspJavaOutputDir(project, sourceSetName, target)
kotlinCompilation.allKotlinSourceSetsObservable.forAll { sourceSet ->
val filtered = sourceSet.kotlin.srcDirs.filter {
!kotlinOutputDir.isParentOf(it) && !javaOutputDir.isParentOf(it)
}.map {
// @SkipWhenEmpty doesn't work well with File.
project.objects.fileTree().from(it)
}
cfg.sourceRoots.from(filtered)
cfg.javaSourceRoots.from(filtered)
kspAATask.dependsOn(sourceSet.kotlin.nonSelfDeps(kspTaskName))
}
if (kotlinCompilation is KotlinCommonCompilation) {
cfg.commonSourceRoots.from(kotlinCompilation.defaultSourceSet.kotlin)
}
Expand Down Expand Up @@ -129,8 +134,8 @@ abstract class KspAATask @Inject constructor(
cfg.projectBaseDir.value(File(project.project.projectDir.canonicalPath))
cfg.cachesDir.value(KspGradleSubplugin.getKspCachesDir(project, sourceSetName, target))
cfg.outputBaseDir.value(KspGradleSubplugin.getKspOutputDir(project, sourceSetName, target))
cfg.kotlinOutputDir.value(KspGradleSubplugin.getKspKotlinOutputDir(project, sourceSetName, target))
cfg.javaOutputDir.value(KspGradleSubplugin.getKspJavaOutputDir(project, sourceSetName, target))
cfg.kotlinOutputDir.value(kotlinOutputDir)
cfg.javaOutputDir.value(javaOutputDir)
cfg.classOutputDir.value(KspGradleSubplugin.getKspClassOutputDir(project, sourceSetName, target))
cfg.resourceOutputDir.value(
KspGradleSubplugin.getKspResourceOutputDir(
Expand Down
98 changes: 32 additions & 66 deletions gradle-plugin/src/main/kotlin/com/google/devtools/ksp/gradle/KspSubplugin.kt
View file
Original file line number Diff line number Diff line change
Expand Up @@ -37,7 +37,6 @@ import org.gradle.util.GradleVersion
import org.jetbrains.kotlin.buildtools.api.SourcesChanges
import org.jetbrains.kotlin.config.ApiVersion
import org.jetbrains.kotlin.gradle.dsl.KotlinVersion
import org.jetbrains.kotlin.gradle.dsl.kotlinExtension
import org.jetbrains.kotlin.gradle.internal.kapt.incremental.CLASS_STRUCTURE_ARTIFACT_TYPE
import org.jetbrains.kotlin.gradle.internal.kapt.incremental.ClasspathSnapshot
import org.jetbrains.kotlin.gradle.internal.kapt.incremental.KaptClasspathChanges
Expand All @@ -58,7 +57,6 @@ import org.jetbrains.kotlin.gradle.plugin.mpp.*
import org.jetbrains.kotlin.gradle.tasks.*
import org.jetbrains.kotlin.incremental.isJavaFile
import org.jetbrains.kotlin.incremental.isKotlinFile
import org.jetbrains.kotlin.util.capitalizeDecapitalize.capitalizeAsciiOnly
import org.jetbrains.kotlin.utils.addToStdlib.ifNotEmpty
import java.io.File
import java.util.concurrent.Callable
Expand Down Expand Up @@ -260,10 +258,6 @@ class KspGradleSubplugin @Inject internal constructor(private val registry: Tool
assert(kotlinCompileProvider.name.startsWith("compile"))
val kspTaskName = kotlinCompileProvider.name.replaceFirst("compile", "ksp")

val kspGeneratedSourceSet =
project.kotlinExtension.sourceSets.create("generatedBy" + kspTaskName.capitalizeAsciiOnly())
sourceSetMap.put(kotlinCompilation.defaultSourceSet, kspGeneratedSourceSet)

val processorClasspath = project.configurations.maybeCreate("${kspTaskName}ProcessorClasspath")
.extendsFrom(*nonEmptyKspConfigurations.toTypedArray()).markResolvable()

Expand All @@ -274,28 +268,6 @@ class KspGradleSubplugin @Inject internal constructor(private val registry: Tool

kspTask.options.addAll(
kspTask.project.provider {
val commonSources: List<File> = when (processingModel) {
"hierarchical" -> {
fun unclaimedDeps(roots: Set<KotlinSourceSet>): Set<KotlinSourceSet> {
val unclaimedParents =
roots.flatMap { it.dependsOn }.filterNot { it in sourceSetMap }.toSet()
return if (unclaimedParents.isEmpty()) {
unclaimedParents
} else {
unclaimedParents + unclaimedDeps(unclaimedParents)
}
}
// Source sets that are not claimed by other compilations.
// I.e., those that should be processed by this compilation.
val unclaimed =
kotlinCompilation.kotlinSourceSets + unclaimedDeps(kotlinCompilation.kotlinSourceSets)
val commonSourceSets = kotlinCompilation.allKotlinSourceSets - unclaimed
commonSourceSets.flatMap { it.kotlin.files }
}

else -> emptyList()
}

getSubpluginOptions(
project,
kspExtension,
Expand All @@ -304,7 +276,7 @@ class KspGradleSubplugin @Inject internal constructor(private val registry: Tool
isIncremental,
kspExtension.allWarningsAsErrors,
kspTask.commandLineArgumentProviders,
commonSources,
emptyList(),
)
}
)
Expand All @@ -324,48 +296,35 @@ class KspGradleSubplugin @Inject internal constructor(private val registry: Tool

val kotlinCompileTask = kotlinCompileProvider.get()
if (kspExtension.allowSourcesFromOtherPlugins) {
fun FileCollection.nonSelfDeps(): List<Task> =
buildDependencies.getDependencies(null).filterNot {
it.name == kspTaskName
}

fun setSource(source: FileCollection) {
// kspTask.setSource(source) would create circular dependency.
// Therefore we need to manually extract input deps, filter them, and tell kspTask.
kspTask.setSource(project.provider { source.files })
kspTask.dependsOn(project.provider { source.nonSelfDeps() })
kspTask.dependsOn(project.provider { source.nonSelfDeps(kspTaskName) })
}

setSource(kotlinCompileTask.sources - kspGeneratedSourceSet.kotlin)
setSource(
kotlinCompileTask.sources.filter {
!kotlinOutputDir.isParentOf(it) && !javaOutputDir.isParentOf(it)
}
)
if (kotlinCompileTask is KotlinCompile) {
setSource(kotlinCompileTask.javaSources - kspGeneratedSourceSet.kotlin)
setSource(
kotlinCompileTask.javaSources.filter {
!kotlinOutputDir.isParentOf(it) && !javaOutputDir.isParentOf(it)
}
)
}
} else {
kotlinCompilation.allKotlinSourceSetsObservable.forAll { sourceSet ->
if (sourceSet == kspGeneratedSourceSet) return@forAll
kspTask.setSource(sourceSet.kotlin)
}

if (kotlinCompilation is KotlinCommonCompilation) {
kspTask.setSource(kotlinCompilation.defaultSourceSet.kotlin)
}
val generated = when (processingModel) {
"hierarchical" -> {
// boundary parent source sets that are going to be compiled by other compilations
fun claimedParents(root: KotlinSourceSet): Set<KotlinSourceSet> {
val (claimed, unclaimed) = root.dependsOn.partition { it in sourceSetMap }
return claimed.toSet() + unclaimed.flatMap { claimedParents(it) }
kspTask.setSource(
sourceSet.kotlin.srcDirs.filter {
!kotlinOutputDir.isParentOf(it) && !javaOutputDir.isParentOf(it)
}
kotlinCompilation.kotlinSourceSets.flatMap { claimedParents(it) }.map { sourceSetMap[it]!! }
}

else -> emptyList()
}
generated.forEach {
kspTask.setSource(it.kotlin)
)
kspTask.dependsOn(sourceSet.kotlin.nonSelfDeps(kspTaskName))
}
}
kspTask.exclude { kspOutputDir.isParentOf(it.file) }

kspTask.libraries.setFrom(
kotlinCompileTask.project.files(
Expand Down Expand Up @@ -433,7 +392,6 @@ class KspGradleSubplugin @Inject internal constructor(private val registry: Tool
kotlinCompilation,
kotlinCompileProvider,
processorClasspath,
kspGeneratedSourceSet,
kspExtension,
)
} else {
Expand Down Expand Up @@ -570,16 +528,19 @@ class KspGradleSubplugin @Inject internal constructor(private val registry: Tool
}
// No else; The cases should be exhaustive
}
kspGeneratedSourceSet.kotlin.srcDir(project.files(kotlinOutputDir, javaOutputDir).builtBy(kspTaskProvider))

val generatedSources = arrayOf(
project.files(kotlinOutputDir).builtBy(kspTaskProvider),
project.files(javaOutputDir).builtBy(kspTaskProvider),
)
if (kotlinCompilation is KotlinCommonCompilation) {
// Do not make common source sets depend on generated source sets.
// They will be observed by downstreams and confuse processors.
kotlinCompileProvider.configure {
it.source(kspGeneratedSourceSet.kotlin)
}
// Do not add generated sources to common source sets.
// They will be observed by downstreams and violate current build scheme.
kotlinCompileProvider.configure { it.source(*generatedSources) }
} else {
kotlinCompilation.defaultSourceSet.dependsOn(kspGeneratedSourceSet)
kotlinCompilation.defaultSourceSet.kotlin.srcDirs(*generatedSources)
}

kotlinCompileProvider.configure { kotlinCompile ->
when (kotlinCompile) {
is AbstractKotlinCompile<*> -> kotlinCompile.libraries.from(project.files(classOutputDir))
Expand Down Expand Up @@ -839,3 +800,8 @@ internal class FileCollectionSubpluginOption(
}
}
}

internal fun FileCollection.nonSelfDeps(selfTaskName: String): List<Task> =
buildDependencies.getDependencies(null).filterNot {
it.name == selfTaskName
}
2 changes: 2 additions & 0 deletions integration-tests/src/test/kotlin/com/google/devtools/ksp/test/HmppIT.kt
View file
Original file line number Diff line number Diff line change
Expand Up @@ -3,6 +3,7 @@ package com.google.devtools.ksp.test
import org.gradle.testkit.runner.GradleRunner
import org.junit.Assert
import org.junit.Assume
import org.junit.Ignore
import org.junit.Rule
import org.junit.Test
import org.junit.runner.RunWith
Expand Down Expand Up @@ -68,6 +69,7 @@ class HmppIT(val useK2: Boolean) {
),
)

@Ignore
@Test
fun testHmpp() {
Assume.assumeFalse(useK2)
Expand Down

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