jps: Don't create cache for common modules (KOTLIN-CR-2028)

jps-plugin/jps-tests/test/org/jetbrains/kotlin/jps/build/AbstractIncrementalJpsTest.kt

@@ -300,9 +300,12 @@ abstract class AbstractIncrementalJpsTest(
     ): String {
         return buildString {
             for (target in project.allModuleTargets.sortedBy { it.presentableName }) {
-                append("<target $target>\n")
+                val kotlinCache = project.dataManager.getKotlinCache(dummyCompileContext.kotlinBuildTargets[target])
-                append(project.dataManager.getKotlinCache(dummyCompileContext.kotlinBuildTargets[target]!!).dump())
+                if (kotlinCache != null) {
-                append("</target $target>\n\n\n")
+                    append("<target $target>\n")
+                    append(kotlinCache.dump())
+                    append("</target $target>\n\n\n")
+                }
             }
         }
     }

jps-plugin/src/org/jetbrains/kotlin/jps/build/KotlinBuilder.kt

@@ -47,10 +47,7 @@ import org.jetbrains.kotlin.incremental.*
 import org.jetbrains.kotlin.incremental.components.ExpectActualTracker
 import org.jetbrains.kotlin.incremental.components.LookupTracker
 import org.jetbrains.kotlin.jps.incremental.*
-import org.jetbrains.kotlin.jps.platforms.KotlinCommonModuleBuildTarget
+import org.jetbrains.kotlin.jps.platforms.*
-import org.jetbrains.kotlin.jps.platforms.KotlinJsModuleBuildTarget
-import org.jetbrains.kotlin.jps.platforms.KotlinModuleBuildTarget
-import org.jetbrains.kotlin.jps.platforms.kotlinBuildTargets
 import org.jetbrains.kotlin.name.FqName
 import org.jetbrains.kotlin.preloading.ClassCondition
 import org.jetbrains.kotlin.utils.KotlinPaths
@@ -427,7 +424,7 @@ class KotlinBuilder : ModuleLevelBuilder(BuilderCategory.SOURCE_PROCESSOR) {
 
                     val kotlinBuildTargets = context.kotlinBuildTargets
                     for (target in targets) {
-                        dataManager.getKotlinCache(kotlinBuildTargets[target]!!).clean()
+                        dataManager.getKotlinCache(kotlinBuildTargets[target])?.clean()
                         hasKotlin.clean(target)
                         rebuildAfterCacheVersionChanged[target] = true
                     }
@@ -441,7 +438,7 @@ class KotlinBuilder : ModuleLevelBuilder(BuilderCategory.SOURCE_PROCESSOR) {
 
                     val kotlinBuildTargets = context.kotlinBuildTargets
                     for (target in context.allTargets()) {
-                        dataManager.getKotlinCache(kotlinBuildTargets[target]!!).clean()
+                        dataManager.getKotlinCache(kotlinBuildTargets[target])?.clean()
                     }
                 }
                 CacheVersion.Action.CLEAN_DATA_CONTAINER -> {
@@ -473,7 +470,7 @@ class KotlinBuilder : ModuleLevelBuilder(BuilderCategory.SOURCE_PROCESSOR) {
 
         val kotlinBuildTargets = context.kotlinBuildTargets
         for (target in context.allTargets()) {
-            dataManager.getKotlinCache(kotlinBuildTargets[target]!!).clean()
+            dataManager.getKotlinCache(kotlinBuildTargets[target])?.clean()
             rebuildAfterCacheVersionChanged[target] = true
         }
 
@@ -703,23 +700,17 @@ private fun getIncrementalCaches(
     chunk: ModuleChunk,
     context: CompileContext
 ): Map<ModuleBuildTarget, JpsIncrementalCache> {
-    val dependentTargets = getDependentTargets(chunk, context)
-
     val dataManager = context.projectDescriptor.dataManager
     val kotlinBuildTargets = context.kotlinBuildTargets
 
     val chunkCaches = chunk.targets.keysToMapExceptNulls {
-        val kotlinModuleBuilderTarget = kotlinBuildTargets[it]
+        dataManager.getKotlinCache(kotlinBuildTargets[it])
-        if (kotlinModuleBuilderTarget !is KotlinCommonModuleBuildTarget) {
-            dataManager.getKotlinCache(kotlinBuildTargets[it]!!)
-        } else null
     }
 
+    val dependentTargets = getDependentTargets(chunkCaches.keys, context)
+
     val dependentCaches = dependentTargets.mapNotNull {
-        val kotlinModuleBuilderTarget = kotlinBuildTargets[it]
+        dataManager.getKotlinCache(kotlinBuildTargets[it])
-        if (kotlinModuleBuilderTarget !is KotlinCommonModuleBuildTarget) {
-            dataManager.getKotlinCache(kotlinModuleBuilderTarget!!)
-        } else null
     }
 
     for (chunkCache in chunkCaches.values) {
@@ -732,17 +723,20 @@ private fun getIncrementalCaches(
 }
 
 fun getDependentTargets(
-    compilingChunk: ModuleChunk,
+    compilingChunkTargets: Set<ModuleBuildTarget>,
     context: CompileContext
 ): Set<ModuleBuildTarget> {
-    val compilingChunkIsTests = compilingChunk.targets.any { it.isTests }
+    if (compilingChunkTargets.isEmpty()) return setOf()
+
+    val compilingChunkModules: Set<JpsModule> = compilingChunkTargets.mapTo(mutableSetOf()) { it.module }
+    val compilingChunkIsTests = compilingChunkTargets.any { it.isTests }
     val classpathKind = JpsJavaClasspathKind.compile(compilingChunkIsTests)
 
     fun dependsOnCompilingChunk(target: BuildTarget<*>): Boolean {
         if (target !is ModuleBuildTarget || compilingChunkIsTests && !target.isTests) return false
 
         val dependencies = getDependenciesRecursively(target.module, classpathKind)
-        return ContainerUtil.intersects(dependencies, compilingChunk.modules)
+        return ContainerUtil.intersects(dependencies, compilingChunkModules)
     }
 
     val dependentTargets = HashSet<ModuleBuildTarget>()
@@ -750,7 +744,7 @@ fun getDependentTargets(
 
     // skip chunks that are compiled before compilingChunk
     while (sortedChunks.hasNext()) {
-        if (sortedChunks.next().targets == compilingChunk.targets) break
+        if (sortedChunks.next().targets == compilingChunkTargets) break
     }
 
     // process chunks that compiled after compilingChunk

jps-plugin/src/org/jetbrains/kotlin/jps/incremental/JpsIncrementalCache.kt

@@ -60,6 +60,10 @@ private class KotlinIncrementalStorageProvider(
     private val target: KotlinModuleBuildTarget,
     private val paths: BuildDataPaths
 ) : StorageProvider<JpsIncrementalCache>() {
+    init {
+        check(target.hasCaches)
+    }
+
     override fun equals(other: Any?) = other is KotlinIncrementalStorageProvider && target == other.target
 
     override fun hashCode() = target.hashCode()
@@ -67,6 +71,7 @@ private class KotlinIncrementalStorageProvider(
     override fun createStorage(targetDataDir: File): JpsIncrementalCache = target.createCacheStorage(paths)
 }
 
-fun BuildDataManager.getKotlinCache(target: KotlinModuleBuildTarget): JpsIncrementalCache =
+fun BuildDataManager.getKotlinCache(target: KotlinModuleBuildTarget?): JpsIncrementalCache? =
-    getStorage(target.jpsModuleBuildTarget, KotlinIncrementalStorageProvider(target, dataPaths))
+    if (target == null || !target.hasCaches) null
+    else getStorage(target.jpsModuleBuildTarget, KotlinIncrementalStorageProvider(target, dataPaths))
 

jps-plugin/src/org/jetbrains/kotlin/jps/platforms/KotlinCommonModuleBuildTarget.kt

@@ -85,5 +85,9 @@ class KotlinCommonModuleBuildTarget(context: CompileContext, jpsModuleBuildTarge
         }
     }
 
-    override fun createCacheStorage(paths: BuildDataPaths) = JpsIncrementalJvmCache(jpsModuleBuildTarget, paths) // todo: delete
+    override val hasCaches: Boolean
+        get() = false
+
+    override fun createCacheStorage(paths: BuildDataPaths) =
+        error("incremental K2MetadataCompiler not supported yet, createCacheStorage() should not be called")
 }

jps-plugin/src/org/jetbrains/kotlin/jps/platforms/KotlinModuleBuildTarget.kt

@@ -174,6 +174,8 @@ abstract class KotlinModuleBuildTarget(val context: CompileContext, val jpsModul
     open fun doAfterBuild() {
     }
 
+    open val hasCaches: Boolean = true
+
     abstract fun createCacheStorage(paths: BuildDataPaths): JpsIncrementalCache
 
     /**