Ignore breakpoints from unrecognized source files

In multi-language project non-Kotlin breakpoints would otherwise cause
the debug adapter to crash with an exception.

Author: fwcd

adapter/src/main/kotlin/org/javacs/ktda/classpath/PathUtils.kt

@@ -17,7 +17,7 @@ private val sourceFileExtensions = setOf(".kt", ".kts", ".java")
  * ".../src/main/kotlin/com/abc/MyClass.kt" will be converted to
  * [com.abc.MyClass, com.abc.MyClassKt]
  */
-fun toJVMClassNames(filePath: String): List<String> {
+fun toJVMClassNames(filePath: String): List<String>? {
 	// TODO: Implement this using the Kotlin compiler API instead
 	// See https://github.com/JetBrains/kotlin-netbeans/blob/c3360e8c89c1d4dac1e6f18267052ff740705079/src/main/java/org/jetbrains/kotlin/debugger/KotlinDebugUtils.java#L166-L194
 
@@ -28,7 +28,7 @@ fun toJVMClassNames(filePath: String): List<String> {
 		.asSequence()
 		.find { filePath.endsWith(it) }
 		?.let { rawClassName.dropLast(it.length) }
-		?: throw IllegalArgumentException("Can't convert unrecognized source file '" + filePath + "' to JVM class name")
+		?: return null
 	val ktClassName = className
 		.capitalizeCharAt(className.lastIndexOf(".") + 1) + "Kt" // Class name to PascalCase
 

adapter/src/main/kotlin/org/javacs/ktda/jdi/JDIDebuggee.kt

@@ -26,6 +26,7 @@ import java.io.File
 import java.io.InputStream
 import java.io.OutputStream
 import java.nio.file.Path
+import java.nio.file.Paths
 import java.nio.charset.StandardCharsets
 
 class JDIDebuggee(
@@ -99,7 +100,7 @@ class JDIDebuggee(
 		val eventRequestManager = vm.eventRequestManager()
 
 		toJVMClassNames(filePath)
-			.forEach { className ->
+			?.forEach { className ->
 				// Try setting breakpoint using a ClassPrepareRequest
 
 				for (name in listOf(className, "$className$*")) { // For local types
@@ -127,7 +128,7 @@ class JDIDebuggee(
 						LOG.trace("Setting breakpoint at known type {}", it.name())
 						setBreakpointAtType(it, lineNumber)
 					}
-			}
+			} ?: LOG.warn("Not adding breakpoint in unrecognized source file {}", Paths.get(filePath).fileName)
 	}
 
 	/** Tries to set a breakpoint - Will return whether this was successful */