Add the ability to set kotlinc compiler flags

src/jvmMain/kotlin/dev/romainguy/kotlin/explorer/Disassembly.kt

@@ -44,6 +44,7 @@ private val oatDumpParser = OatDumpParser()
 
 suspend fun buildAndRun(
     toolPaths: ToolPaths,
+    compilerFlags: String,
     source: String,
     onLogs: (AnnotatedString) -> Unit,
     onStatusUpdate: (String, Float) -> Unit
@@ -62,7 +63,7 @@ suspend fun buildAndRun(
             Files.writeString(path, source)
             writeSupportFiles(directory)
 
-            val kotlinc = KotlinCompiler(toolPaths, directory).compile(path)
+            val kotlinc = KotlinCompiler(toolPaths, directory).compile(compilerFlags, path)
 
             if (kotlinc.exitCode != 0) {
                 withContext(ui) {
@@ -95,6 +96,7 @@ suspend fun buildAndRun(
 suspend fun buildAndDisassemble(
     toolPaths: ToolPaths,
     source: String,
+    compilerFlags: String,
     r8rules: String,
     minApi: Int,
     instructionSets: Map<ISA, Boolean>,
@@ -122,7 +124,7 @@ suspend fun buildAndDisassemble(
             Files.writeString(path, source)
             writeSupportFiles(directory)
 
-            val kotlinc = KotlinCompiler(toolPaths, directory).compile(path)
+            val kotlinc = KotlinCompiler(toolPaths, directory).compile(compilerFlags, path)
 
             if (kotlinc.exitCode != 0) {
                 updater.addJob(launch(ui) {

src/jvmMain/kotlin/dev/romainguy/kotlin/explorer/KotlinExplorer.kt

@@ -526,6 +526,7 @@ private fun FrameWindowScope.MainMenu(
             buildAndDisassemble(
                 explorerState.toolPaths,
                 sourceTextArea.text,
+                explorerState.compilerFlags,
                 explorerState.r8Rules,
                 explorerState.minApi,
                 instructionSets,
@@ -543,6 +544,7 @@ private fun FrameWindowScope.MainMenu(
         scope.launch {
             buildAndRun(
                 explorerState.toolPaths,
+                explorerState.compilerFlags,
                 sourceTextArea.text,
                 onLogsUpdate,
                 onStatusUpdate

src/jvmMain/kotlin/dev/romainguy/kotlin/explorer/Settings.kt

@@ -39,6 +39,7 @@ fun Settings(
 ) {
     val androidHome = rememberTextFieldState(state.androidHome)
     val kotlinHome = rememberTextFieldState(state.kotlinHome)
+    val compilerFlags = rememberTextFieldState(state.compilerFlags)
     val r8rules = rememberTextFieldState(state.r8Rules)
     val minApi = rememberTextFieldState(state.minApi.toString())
     val indent = rememberTextFieldState(state.indent.toString())
@@ -48,6 +49,7 @@ fun Settings(
         state.saveState(
             androidHome.text.toString(),
             kotlinHome.text.toString(),
+            compilerFlags.text.toString(),
             r8rules.text.toString(),
             minApi.text.toString(),
             indent.text.toString(),
@@ -63,6 +65,7 @@ fun Settings(
         StringSetting("Kotlin home directory: ", kotlinHome) { toolPaths.isKotlinHomeValid }
         IntSetting("Decompiled code indent: ", indent, minValue = 2)
         IntSetting("Line number column width: ", lineNumberWidth, minValue = 1)
+        StringSetting("Kotlin compiler flags: ", compilerFlags)
         MultiLineStringSetting("R8 rules: ", r8rules)
         IntSetting("Min API: ", minApi, minValue = 1)
         BooleanSetting("Decompile hidden instruction sets", decompileHiddenIsa)
@@ -90,6 +93,7 @@ private fun ColumnScope.Buttons(
 private fun ExplorerState.saveState(
     androidHome: String,
     kotlinHome: String,
+    compilerFlags: String,
     r8Rules: String,
     minApi: String,
     indent: String,
@@ -98,6 +102,7 @@ private fun ExplorerState.saveState(
 ) {
     this.androidHome = androidHome
     this.kotlinHome = kotlinHome
+    this.compilerFlags = compilerFlags
     this.r8Rules = r8Rules
     this.minApi = minApi.toIntOrNull() ?: 21
     this.indent = indent.toIntOrNull() ?: 4
@@ -107,8 +112,8 @@ private fun ExplorerState.saveState(
 }
 
 @Composable
-private fun StringSetting(title: String, state: TextFieldState, isValid: () -> Boolean) {
-    SettingRow(title, state, isValid,)
+private fun StringSetting(title: String, state: TextFieldState, isValid: () -> Boolean = { true }) {
+    SettingRow(title, state, isValid)
 }
 
 @Composable

src/jvmMain/kotlin/dev/romainguy/kotlin/explorer/State.kt

@@ -29,6 +29,7 @@ private const val AndroidHome = "ANDROID_HOME"
 private const val KotlinHome = "KOTLIN_HOME"
 private const val Optimize = "OPTIMIZE"
 private const val KeepEverything = "KEEP_EVERYTHING"
+private const val CompilerFlags = "COMPILER_FLAGS"
 private const val R8Rules = "R8_RULES"
 private const val MinApi = "MIN_API"
 private const val AutoBuildOnStartup = "AUTO_BUILD_ON_STARTUP"
@@ -58,6 +59,7 @@ class ExplorerState {
     var toolPaths by mutableStateOf(createToolPaths())
     var optimize by BooleanState(Optimize, true)
     var keepEverything by BooleanState(KeepEverything, true)
+    var compilerFlags by StringState(CompilerFlags, "")
     var r8Rules by StringState(R8Rules, "")
     var minApi by IntState(MinApi, 21)
     var autoBuildOnStartup by BooleanState(AutoBuildOnStartup, false)

src/jvmMain/kotlin/dev/romainguy/kotlin/explorer/build/KolinCompiler.kt

@@ -21,10 +21,10 @@ import dev.romainguy.kotlin.explorer.process
 import java.nio.file.Path
 
 class KotlinCompiler(private val toolPaths: ToolPaths, private val outputDirectory: Path) {
+    suspend fun compile(compilerFlags: String, source: Path) =
+        process(*buildCompileCommand(compilerFlags, source), directory = outputDirectory)
 
-    suspend fun compile(source: Path) = process(*buildCompileCommand(source), directory = outputDirectory)
-
-    private fun buildCompileCommand(file: Path): Array<String> {
+    private fun buildCompileCommand(compilerFlags: String, file: Path): Array<String> {
         val command = mutableListOf(
             toolPaths.kotlinc.toString(),
             "-Xmulti-platform",
@@ -35,7 +35,10 @@ class KotlinCompiler(private val toolPaths: ToolPaths, private val outputDirecto
             (toolPaths.kotlinLibs + listOf(toolPaths.platform)).joinToString(":") { jar -> jar.toString() },
             file.toString(),
             file.parent.resolve("Keep.kt").toString()
-        )
+        ).apply {
+            // TODO: Do something smarter in case a flag looks like -foo="something with space"
+            addAll(compilerFlags.split(' '))
+        }
 
         return command.toTypedArray()
     }

src/jvmTest/kotlin/dev/romainguy/kotlin/explorer/testing/Builder.kt

@@ -82,7 +82,7 @@ class LocalBuilder(private val outputDirectory: Path) : Builder {
     }
 
     private suspend fun kotlinCompile(path: Path) {
-        val result = kotlinCompiler.compile(path)
+        val result = kotlinCompiler.compile(compilerFlags, path)
         if (result.exitCode != 0) {
             System.err.println(result.output)
             fail("kotlinc error")