[BT] Add support for in-process incremental compilation

#KT-61865 Fixed

compiler/incremental-compilation-impl/src/org/jetbrains/kotlin/incremental/DirtyFilesContainer.kt

@@ -12,7 +12,7 @@ import java.io.File
 class DirtyFilesContainer(
     private val caches: IncrementalCachesManager<*>,
     private val reporter: ICReporter,
-    private val sourceFilesExtensions: List<String>
+    private val sourceFilesExtensions: Set<String>
 ) {
     private val myDirtyFiles = HashSet<File>()
 

compiler/incremental-compilation-impl/src/org/jetbrains/kotlin/incremental/IncrementalCompilerRunner.kt

@@ -81,7 +81,7 @@ abstract class IncrementalCompilerRunner<
     private val dirtySourcesSinceLastTimeFile = File(workingDir, DIRTY_SOURCES_FILE_NAME)
     protected val lastBuildInfoFile = File(workingDir, LAST_BUILD_INFO_FILE_NAME)
     private val abiSnapshotFile = File(workingDir, ABI_SNAPSHOT_FILE_NAME)
-    protected open val kotlinSourceFilesExtensions: List<String> = DEFAULT_KOTLIN_SOURCE_FILES_EXTENSIONS
+    protected open val kotlinSourceFilesExtensions: Set<String> = DEFAULT_KOTLIN_SOURCE_FILES_EXTENSIONS
 
     /**
      * Creates an instance of [IncrementalCompilationContext] that holds common incremental compilation context mostly required for [CacheManager]
@@ -663,3 +663,23 @@ abstract class IncrementalCompilerRunner<
         }
     }
 }
+
+@Deprecated("Temporary function to reuse the logic. KT-62759")
+fun extractKotlinSourcesFromFreeCompilerArguments(
+    compilerArguments: CommonCompilerArguments,
+    kotlinFilenameExtensions: Set<String>,
+): List<File> {
+    val dotExtensions = kotlinFilenameExtensions.map { ".$it" }
+    val freeArgs = arrayListOf<String>()
+    val allKotlinFiles = arrayListOf<File>()
+    for (arg in compilerArguments.freeArgs) {
+        val file = File(arg)
+        if (file.isFile && dotExtensions.any { ext -> file.path.endsWith(ext, ignoreCase = true) }) {
+            allKotlinFiles.add(file)
+        } else {
+            freeArgs.add(arg)
+        }
+    }
+    compilerArguments.freeArgs = freeArgs
+    return allKotlinFiles
+}

compiler/incremental-compilation-impl/src/org/jetbrains/kotlin/incremental/IncrementalFirJvmCompilerRunner.kt

@@ -64,7 +64,7 @@ open class IncrementalFirJvmCompilerRunner(
     buildHistoryFile: File?,
     outputDirs: Collection<File>?,
     modulesApiHistory: ModulesApiHistory,
-    kotlinSourceFilesExtensions: List<String> = DEFAULT_KOTLIN_SOURCE_FILES_EXTENSIONS,
+    kotlinSourceFilesExtensions: Set<String> = DEFAULT_KOTLIN_SOURCE_FILES_EXTENSIONS,
     classpathChanges: ClasspathChanges
 ) : IncrementalJvmCompilerRunner(
     workingDir,

compiler/incremental-compilation-impl/src/org/jetbrains/kotlin/incremental/IncrementalJvmCompilerRunner.kt

@@ -66,7 +66,7 @@ open class IncrementalJvmCompilerRunner(
     buildHistoryFile: File?,
     outputDirs: Collection<File>?,
     private val modulesApiHistory: ModulesApiHistory,
-    override val kotlinSourceFilesExtensions: List<String> = DEFAULT_KOTLIN_SOURCE_FILES_EXTENSIONS,
+    override val kotlinSourceFilesExtensions: Set<String> = DEFAULT_KOTLIN_SOURCE_FILES_EXTENSIONS,
     private val classpathChanges: ClasspathChanges,
     withAbiSnapshot: Boolean = false,
     preciseCompilationResultsBackup: Boolean = false,

compiler/incremental-compilation-impl/test/org/jetbrains/kotlin/incremental/IncrementalFirJvmCompilerTestRunner.kt

@@ -18,7 +18,7 @@ class IncrementalFirJvmCompilerTestRunner(
     buildHistoryFile: File,
     outputDirs: Collection<File>?,
     modulesApiHistory: ModulesApiHistory,
-    kotlinSourceFilesExtensions: List<String> = DEFAULT_KOTLIN_SOURCE_FILES_EXTENSIONS,
+    kotlinSourceFilesExtensions: Set<String> = DEFAULT_KOTLIN_SOURCE_FILES_EXTENSIONS,
     classpathChanges: ClasspathChanges,
     val testLookupTracker: TestLookupTracker
 ) : IncrementalFirJvmCompilerRunner(

compiler/incremental-compilation-impl/test/org/jetbrains/kotlin/incremental/IncrementalJvmCompilerTestRunner.kt

@@ -19,7 +19,7 @@ class IncrementalJvmCompilerTestRunner(
     buildHistoryFile: File,
     outputDirs: Collection<File>?,
     modulesApiHistory: ModulesApiHistory,
-    override val kotlinSourceFilesExtensions: List<String> = DEFAULT_KOTLIN_SOURCE_FILES_EXTENSIONS,
+    override val kotlinSourceFilesExtensions: Set<String> = DEFAULT_KOTLIN_SOURCE_FILES_EXTENSIONS,
     classpathChanges: ClasspathChanges,
     withAbiSnapshot: Boolean = false,
     val testLookupTracker: TestLookupTracker