Enable listFiles and listEmittedFiles as build option

src/compiler/watch.ts

@@ -101,7 +101,7 @@ namespace ts {
         getGlobalDiagnostics(): ReadonlyArray<Diagnostic>;
         getSemanticDiagnostics(): ReadonlyArray<Diagnostic>;
         getConfigFileParsingDiagnostics(): ReadonlyArray<Diagnostic>;
-        emit(): EmitResult;
+        emit(targetSourceFile?: SourceFile, writeFile?: WriteFileCallback): EmitResult;
     }
 
     export type ReportEmitErrorSummary = (errorCount: number) => void;
@@ -109,7 +109,7 @@ namespace ts {
     /**
      * Helper that emit files, report diagnostics and lists emitted and/or source files depending on compiler options
      */
-    export function emitFilesAndReportErrors(program: ProgramToEmitFilesAndReportErrors, reportDiagnostic: DiagnosticReporter, writeFileName?: (s: string) => void, reportSummary?: ReportEmitErrorSummary) {
+    export function emitFilesAndReportErrors(program: ProgramToEmitFilesAndReportErrors, reportDiagnostic: DiagnosticReporter, writeFileName?: (s: string) => void, reportSummary?: ReportEmitErrorSummary, writeFile?: WriteFileCallback) {
         // First get and report any syntactic errors.
         const diagnostics = program.getConfigFileParsingDiagnostics().slice();
         const configFileParsingDiagnosticsLength = diagnostics.length;
@@ -128,7 +128,7 @@ namespace ts {
         }
 
         // Emit and report any errors we ran into.
-        const { emittedFiles, emitSkipped, diagnostics: emitDiagnostics } = program.emit();
+        const { emittedFiles, emitSkipped, diagnostics: emitDiagnostics } = program.emit(/*targetSourceFile*/ undefined, writeFile);
         addRange(diagnostics, emitDiagnostics);
 
         if (reportSemanticDiagnostics) {