Adding sourceFiles to the Program emit callback

src/compiler/emitter.ts

@@ -604,7 +604,7 @@ var __awaiter = (this && this.__awaiter) || function (thisArg, _arguments, P, ge
                     write(`//# sourceMappingURL=${sourceMappingURL}`);
                 }
 
-                writeEmittedFiles(writer.getText(), jsFilePath, sourceMapFilePath, /*writeByteOrderMark*/ compilerOptions.emitBOM);
+                writeEmittedFiles(writer.getText(), jsFilePath, sourceMapFilePath, /*writeByteOrderMark*/ compilerOptions.emitBOM, sourceFiles);
 
                 // reset the state
                 sourceMap.reset();
@@ -748,16 +748,16 @@ var __awaiter = (this && this.__awaiter) || function (thisArg, _arguments, P, ge
             }
 
             /** Write emitted output to disk */
-            function writeEmittedFiles(emitOutput: string, jsFilePath: string, sourceMapFilePath: string, writeByteOrderMark: boolean) {
+            function writeEmittedFiles(emitOutput: string, jsFilePath: string, sourceMapFilePath: string, writeByteOrderMark: boolean, sourceFiles: SourceFile[]) {
                 if (compilerOptions.sourceMap && !compilerOptions.inlineSourceMap) {
-                    writeFile(host, emitterDiagnostics, sourceMapFilePath, sourceMap.getText(), /*writeByteOrderMark*/ false);
+                    writeFile(host, emitterDiagnostics, sourceMapFilePath, sourceMap.getText(), /*writeByteOrderMark*/ false, sourceFiles);
                 }
 
                 if (sourceMapDataList) {
                     sourceMapDataList.push(sourceMap.getSourceMapData());
                 }
 
-                writeFile(host, emitterDiagnostics, jsFilePath, emitOutput, writeByteOrderMark);
+                writeFile(host, emitterDiagnostics, jsFilePath, emitOutput, writeByteOrderMark, sourceFiles);
             }
 
             // Create a temporary variable with a unique unused name.

src/compiler/program.ts

@@ -931,7 +931,7 @@ namespace ts {
                 getSourceFile: program.getSourceFile,
                 getSourceFiles: program.getSourceFiles,
                 writeFile: writeFileCallback || (
-                    (fileName, data, writeByteOrderMark, onError) => host.writeFile(fileName, data, writeByteOrderMark, onError)),
+                    (fileName, data, writeByteOrderMark, onError, sourceFiles) => host.writeFile(fileName, data, writeByteOrderMark, onError, sourceFiles)),
                 isEmitBlocked,
             };
         }

src/compiler/types.ts

@@ -1584,7 +1584,7 @@ namespace ts {
     }
 
     export interface WriteFileCallback {
-        (fileName: string, data: string, writeByteOrderMark: boolean, onError?: (message: string) => void): void;
+        (fileName: string, data: string, writeByteOrderMark: boolean, onError?: (message: string) => void, sourceFiles?: SourceFile[]): void;
     }
 
     export class OperationCanceledException { }

src/compiler/utilities.ts

@@ -2110,10 +2110,10 @@ namespace ts {
         return combinePaths(newDirPath, sourceFilePath);
     }
 
-    export function writeFile(host: EmitHost, diagnostics: DiagnosticCollection, fileName: string, data: string, writeByteOrderMark: boolean) {
+    export function writeFile(host: EmitHost, diagnostics: DiagnosticCollection, fileName: string, data: string, writeByteOrderMark: boolean, sourceFiles?: SourceFile[]) {
         host.writeFile(fileName, data, writeByteOrderMark, hostErrorMessage => {
             diagnostics.add(createCompilerDiagnostic(Diagnostics.Could_not_write_file_0_Colon_1, fileName, hostErrorMessage));
-        });
+        }, sourceFiles);
     }
 
     export function getLineOfLocalPosition(currentSourceFile: SourceFile, pos: number) {