Show redirected files in --listFiles

Author: sheetalkamat

src/compiler/watch.ts

@@ -122,7 +122,11 @@ namespace ts {
     export function listFiles(program: ProgramToEmitFilesAndReportErrors, writeFileName: (s: string) => void) {
         if (program.getCompilerOptions().listFiles) {
             forEach(program.getSourceFiles(), file => {
-                writeFileName(file.fileName);
+                writeFileName(
+                    !file.redirectInfo ?
+                        file.fileName :
+                        `${file.fileName} -> ${file.redirectInfo.redirectTarget.fileName}`
+                );
             });
         }
     }

src/testRunner/unittests/tsc/declarationEmit.ts

@@ -67,7 +67,7 @@ namespace ts {
                     "/plugin-one/node_modules/plugin-two": new vfs.Symlink("/plugin-two"),
                 });
             },
-            commandLineArgs: ["-p", "plugin-one"]
+            commandLineArgs: ["-p", "plugin-one", "--listFiles"]
         });
     });
 }

tests/baselines/reference/tsc/declarationEmit/initial-build/when-same-version-is-referenced-through-source-and-another-symlinked-package.js

@@ -1,6 +1,12 @@
 //// [/lib/initial-buildOutput.txt]
-/lib/tsc -p plugin-one
+/lib/tsc -p plugin-one --listFiles
 plugin-one/action.ts(4,14): error TS2742: The inferred type of 'actions' cannot be named without a reference to 'plugin-two/node_modules/typescript-fsa'. This is likely not portable. A type annotation is necessary.
+/lib/lib.d.ts
+/plugin-one/node_modules/typescript-fsa/index.d.ts
+/plugin-one/action.ts
+/plugin-two/node_modules/typescript-fsa/index.d.ts -> /plugin-one/node_modules/typescript-fsa/index.d.ts
+/plugin-two/index.d.ts
+/plugin-one/index.ts
 exitCode:: 1