Instead of passing complete typescript, pass in selected

Author: sheetalkamat

src/compiler/sys.ts

@@ -1,4 +1,3 @@
-import * as ts from "./_namespaces/ts";
 import {
     AssertionLevel,
     closeFileWatcher,
@@ -1016,7 +1015,7 @@ export function createSystemWatchFunctions({
             sysLog
         );
         if (typeof resolvedModule === "function") {
-            return setUserWatchFactory(options, resolvedModule({ typescript: ts, options, config: pluginConfigEntry }));
+            return setUserWatchFactory(options, resolvedModule({ typescript: { sys, FileWatcherEventKind }, options, config: pluginConfigEntry }));
         }
         else if (!resolvedModule) {
             forEach(errorLogs, sysLog);

src/compiler/types.ts

@@ -1,11 +1,11 @@
-import * as ts from "./_namespaces/ts";
 import {
     BaseNodeFactory,
     CreateSourceFileOptions,
     DirectoryWatcherCallback,
     EmitHelperFactory,
     FileWatcher,
     FileWatcherCallback,
+    FileWatcherEventKind,
     GetCanonicalFileName,
     MapLike,
     ModeAwareCache,
@@ -19,6 +19,7 @@ import {
     Pattern,
     ProgramBuildInfo,
     SymlinkCache,
+    System,
     ThisContainer,
 } from "./_namespaces/ts";
 
@@ -7206,7 +7207,16 @@ export interface CompilerOptions {
     [option: string]: CompilerOptionsValue | TsConfigSourceFile | undefined;
 }
 
-export type UserWatchFactoryModule = (mod: { typescript: typeof ts, options: WatchOptions, config: any }) => UserWatchFactory;
+export interface TypeScriptSubsetForWatchFactory {
+    sys: System;
+    FileWatcherEventKind: typeof FileWatcherEventKind;
+}
+
+export type UserWatchFactoryModule = (mod: {
+    typescript: TypeScriptSubsetForWatchFactory;
+    options: WatchOptions;
+    config: any;
+}) => UserWatchFactory;
 export interface UserWatchFactory {
     watchFile?(fileName: string, callback: FileWatcherCallback, pollingInterval: number, options: WatchOptions | undefined): FileWatcher;
     watchDirectory?(fileName: string, callback: DirectoryWatcherCallback, recursive: boolean, options: WatchOptions | undefined): FileWatcher;

tests/baselines/reference/api/tsserverlibrary.d.ts

@@ -7226,8 +7226,12 @@ declare namespace ts {
         useDefineForClassFields?: boolean;
         [option: string]: CompilerOptionsValue | TsConfigSourceFile | undefined;
     }
+    interface TypeScriptSubsetForWatchFactory {
+        sys: System;
+        FileWatcherEventKind: typeof FileWatcherEventKind;
+    }
     type UserWatchFactoryModule = (mod: {
-        typescript: typeof ts;
+        typescript: TypeScriptSubsetForWatchFactory;
         options: WatchOptions;
         config: any;
     }) => UserWatchFactory;

tests/baselines/reference/api/typescript.d.ts

@@ -3214,8 +3214,12 @@ declare namespace ts {
         useDefineForClassFields?: boolean;
         [option: string]: CompilerOptionsValue | TsConfigSourceFile | undefined;
     }
+    interface TypeScriptSubsetForWatchFactory {
+        sys: System;
+        FileWatcherEventKind: typeof FileWatcherEventKind;
+    }
     type UserWatchFactoryModule = (mod: {
-        typescript: typeof ts;
+        typescript: TypeScriptSubsetForWatchFactory;
         options: WatchOptions;
         config: any;
     }) => UserWatchFactory;