[FIR] Introduce module :fir:entrypoint and FirSessionFactory for creating sessions

idea/idea-frontend-fir/idea-fir-low-level-api/build.gradle.kts

@@ -15,6 +15,7 @@ dependencies {
     compile(project(":compiler:fir:checkers"))
     compile(project(":compiler:fir:java"))
     compile(project(":compiler:fir:jvm"))
+    implementation(project(":compiler:fir:entrypoint"))
     compile(intellijDep())
     compile(intellijCoreDep())
 

idea/idea-frontend-fir/idea-fir-low-level-api/src/org/jetbrains/kotlin/idea/fir/low/level/api/sessions/FirIdeLibrarySession.kt

@@ -7,16 +7,17 @@ package org.jetbrains.kotlin.idea.fir.low.level.api.sessions
 
 import com.intellij.openapi.project.Project
 import com.intellij.psi.search.GlobalSearchScope
+import org.jetbrains.kotlin.fir.PrivateSessionConstructor
 import org.jetbrains.kotlin.analyzer.ModuleInfo
 import org.jetbrains.kotlin.fir.java.JavaSymbolProvider
 import org.jetbrains.kotlin.fir.java.deserialization.KotlinDeserializedJvmSymbolsProvider
-import org.jetbrains.kotlin.fir.registerCommonComponents
 import org.jetbrains.kotlin.fir.resolve.providers.FirSymbolProvider
 import org.jetbrains.kotlin.fir.resolve.providers.impl.FirBuiltinSymbolProvider
 import org.jetbrains.kotlin.fir.resolve.providers.impl.FirCloneableSymbolProvider
 import org.jetbrains.kotlin.fir.resolve.providers.impl.FirCompositeSymbolProvider
 import org.jetbrains.kotlin.fir.resolve.scopes.wrapScopeWithJvmMapped
 import org.jetbrains.kotlin.fir.scopes.KotlinScopeProvider
+import org.jetbrains.kotlin.fir.session.registerCommonComponents
 import org.jetbrains.kotlin.idea.caches.project.ModuleSourceInfo
 import org.jetbrains.kotlin.idea.caches.resolve.IDEPackagePartProvider
 import org.jetbrains.kotlin.idea.fir.low.level.api.IdeSessionComponents
@@ -26,11 +27,12 @@ import org.jetbrains.kotlin.load.kotlin.VirtualFileFinderFactory
 /**
  * [org.jetbrains.kotlin.fir.FirSession] responsible for all libraries analysing module transitively depends on
  */
+@OptIn(PrivateSessionConstructor::class)
 internal class FirIdeLibrariesSession private constructor(
-    override val moduleInfo: ModuleInfo,
+    moduleInfo: ModuleInfo,
     sessionProvider: FirIdeSessionProvider,
     override val scope: GlobalSearchScope
-) : FirIdeSession(sessionProvider) {
+) : FirIdeSession(moduleInfo, sessionProvider) {
     companion object {
         fun create(
             moduleInfo: ModuleSourceInfo,

idea/idea-frontend-fir/idea-fir-low-level-api/src/org/jetbrains/kotlin/idea/fir/low/level/api/sessions/FirIdeSession.kt

@@ -6,8 +6,14 @@
 package org.jetbrains.kotlin.idea.fir.low.level.api.sessions
 
 import com.intellij.psi.search.GlobalSearchScope
-import org.jetbrains.kotlin.fir.FirSession
+import org.jetbrains.kotlin.analyzer.ModuleInfo
+import org.jetbrains.kotlin.fir.FirModuleBasedSession
+import org.jetbrains.kotlin.fir.PrivateSessionConstructor
 
-internal abstract class FirIdeSession(sessionProvider: FirIdeSessionProvider) : FirSession(sessionProvider) {
+@OptIn(PrivateSessionConstructor::class)
+internal abstract class FirIdeSession(
+    moduleInfo: ModuleInfo,
+    sessionProvider: FirIdeSessionProvider
+) : FirModuleBasedSession(moduleInfo, sessionProvider) {
     abstract val scope: GlobalSearchScope
-}
+}

idea/idea-frontend-fir/idea-fir-low-level-api/src/org/jetbrains/kotlin/idea/fir/low/level/api/sessions/FirIdeSourcesSession.kt

@@ -10,12 +10,10 @@ import com.intellij.openapi.project.Project
 import com.intellij.psi.search.GlobalSearchScope
 import org.jetbrains.kotlin.analyzer.ModuleInfo
 import org.jetbrains.kotlin.fir.*
-import org.jetbrains.kotlin.fir.analysis.registerCheckersComponent
 import org.jetbrains.kotlin.fir.extensions.BunchOfRegisteredExtensions
 import org.jetbrains.kotlin.fir.extensions.extensionService
 import org.jetbrains.kotlin.fir.extensions.registerExtensions
 import org.jetbrains.kotlin.fir.java.JavaSymbolProvider
-import org.jetbrains.kotlin.fir.java.registerJavaSpecificComponents
 import org.jetbrains.kotlin.fir.resolve.firSymbolProvider
 import org.jetbrains.kotlin.fir.resolve.providers.FirProvider
 import org.jetbrains.kotlin.fir.resolve.providers.FirSymbolProvider
@@ -23,6 +21,10 @@ import org.jetbrains.kotlin.fir.resolve.providers.impl.FirCompositeSymbolProvide
 import org.jetbrains.kotlin.fir.resolve.scopes.wrapScopeWithJvmMapped
 import org.jetbrains.kotlin.fir.resolve.transformers.PhasedFirFileResolver
 import org.jetbrains.kotlin.fir.scopes.KotlinScopeProvider
+import org.jetbrains.kotlin.fir.session.registerCheckersComponent
+import org.jetbrains.kotlin.fir.session.registerCommonComponents
+import org.jetbrains.kotlin.fir.session.registerJavaSpecificComponents
+import org.jetbrains.kotlin.fir.session.registerResolveComponents
 import org.jetbrains.kotlin.idea.caches.project.ModuleSourceInfo
 import org.jetbrains.kotlin.idea.fir.low.level.api.lazy.resolve.FirLazyDeclarationResolver
 import org.jetbrains.kotlin.idea.fir.low.level.api.FirPhaseRunner
@@ -36,12 +38,13 @@ import org.jetbrains.kotlin.idea.fir.low.level.api.util.collectTransitiveDepende
 /**
  * [org.jetbrains.kotlin.fir.FirSession] responsible for all Kotlin & Java source modules analysing module transitively depends on
  */
+@OptIn(PrivateSessionConstructor::class)
 internal class FirIdeSourcesSession private constructor(
-    override val moduleInfo: ModuleInfo?,
+    moduleInfo: ModuleInfo,
     sessionProvider: FirIdeSessionProvider,
     override val scope: GlobalSearchScope,
     val firFileBuilder: FirFileBuilder,
-) : FirIdeSession(sessionProvider) {
+) : FirIdeSession(moduleInfo, sessionProvider) {
     val cache get() = firIdeProvider.cache
 
     companion object {

idea/idea-frontend-fir/idea-fir-low-level-api/tests/org/jetbrains/kotlin/idea/fir/low/level/api/AbstractFirMultiModuleResolveTest.kt

@@ -24,6 +24,7 @@ import org.jetbrains.kotlin.fir.resolve.firProvider
 import org.jetbrains.kotlin.fir.resolve.providers.impl.FirProviderImpl
 import org.jetbrains.kotlin.fir.resolve.transformers.FirTransformerBasedResolveProcessor
 import org.jetbrains.kotlin.fir.resolve.transformers.createAllTransformerBasedResolveProcessors
+import org.jetbrains.kotlin.fir.session.FirSessionFactory
 import org.jetbrains.kotlin.idea.KotlinFileType
 import org.jetbrains.kotlin.idea.caches.project.IdeaModuleInfo
 import org.jetbrains.kotlin.idea.caches.project.isLibraryClasses
@@ -59,14 +60,14 @@ abstract class AbstractFirMultiModuleResolveTest : AbstractMultiModuleTest() {
 
     private fun createSession(module: Module, provider: FirProjectSessionProvider): FirJavaModuleBasedSession {
         val moduleInfo = module.productionSourceInfo()!!
-        return FirJavaModuleBasedSession.create(moduleInfo, provider, moduleInfo.contentScope()).also {
+        return FirSessionFactory.createJavaModuleBasedSession(moduleInfo, provider, moduleInfo.contentScope()).also {
             it.extensionService.registerExtensions(BunchOfRegisteredExtensions.empty())
         }
     }
 
     private fun createLibrarySession(moduleInfo: IdeaModuleInfo, provider: FirProjectSessionProvider): FirLibrarySession {
         val contentScope = moduleInfo.contentScope()
-        return FirLibrarySession.create(moduleInfo, provider, contentScope, project, IDEPackagePartProvider(contentScope))
+        return FirSessionFactory.createLibrarySession(moduleInfo, provider, contentScope, project, IDEPackagePartProvider(contentScope))
     }
 
     private fun doFirResolveTest(dirPath: String) {