[Release-2.0] Fix 9662: Visual Studio 2015 with TS2.0 gives incorrect @types path resolution errors (#9867)

* Change the shape of the shim layer to support getAutomaticTypeDirectives

* Change the key for looking up automatic type-directives

* Update baselines from change look-up name of type-directives

* Add @currentDirectory into the test

* Update baselines

* Fix linting error

* Address PR: fix spelling mistake

* Instead of return path of the type directive names just return type directive names

src/services/services.ts

@@ -1886,7 +1886,7 @@ namespace ts {
         };
     }
 
-    // Cache host information about scrip Should be refreshed
+    // Cache host information about script should be refreshed
     // at each language service public entry point, since we don't know when
     // set of scripts handled by the host changes.
     class HostCache {

src/services/shims.ts

@@ -72,8 +72,13 @@ namespace ts {
         directoryExists(directoryName: string): boolean;
     }
 
-    /** Public interface of the the of a config service shim instance.*/
-    export interface CoreServicesShimHost extends Logger, ModuleResolutionHost {
+    /** Public interface of the core-services host instance used in managed side */
+    export interface CoreServicesShimHost extends Logger {
+        directoryExists(directoryName: string): boolean;
+        fileExists(fileName: string): boolean;
+        getCurrentDirectory(): string;
+        getDirectories(path: string): string;
+
         /**
          * Returns a JSON-encoded value of the type: string[]
          *
@@ -81,9 +86,14 @@ namespace ts {
          *  when enumerating the directory.
          */
         readDirectory(rootDir: string, extension: string, basePaths?: string, excludeEx?: string, includeFileEx?: string, includeDirEx?: string, depth?: number): string;
-        useCaseSensitiveFileNames?(): boolean;
-        getCurrentDirectory(): string;
+
+        /**
+         * Read arbitary text files on disk, i.e. when resolution procedure needs the content of 'package.json' to determine location of bundled typings for node modules
+         */
+        readFile(fileName: string): string;
+        realpath?(path: string): string;
         trace(s: string): void;
+        useCaseSensitiveFileNames?(): boolean;
     }
 
     ///
@@ -240,6 +250,7 @@ namespace ts {
     }
 
     export interface CoreServicesShim extends Shim {
+        getAutomaticTypeDirectiveNames(compilerOptionsJson: string): string;
         getPreProcessedFileInfo(fileName: string, sourceText: IScriptSnapshot): string;
         getTSConfigFileInfo(fileName: string, sourceText: IScriptSnapshot): string;
         getDefaultCompilationSettings(): string;
@@ -492,6 +503,10 @@ namespace ts {
         private readDirectoryFallback(rootDir: string, extension: string, exclude: string[]) {
             return JSON.parse(this.shimHost.readDirectory(rootDir, extension, JSON.stringify(exclude)));
         }
+
+        public getDirectories(path: string): string[] {
+            return JSON.parse(this.shimHost.getDirectories(path));
+        }
     }
 
     function simpleForwardCall(logger: Logger, actionDescription: string, action: () => any, logPerformance: boolean): any {
@@ -1003,7 +1018,7 @@ namespace ts {
 
         public getPreProcessedFileInfo(fileName: string, sourceTextSnapshot: IScriptSnapshot): string {
             return this.forwardJSONCall(
-                "getPreProcessedFileInfo('" + fileName + "')",
+                `getPreProcessedFileInfo('${fileName}')`,
                 () => {
                     // for now treat files as JavaScript
                     const result = preProcessFile(sourceTextSnapshot.getText(0, sourceTextSnapshot.getLength()), /* readImportFiles */ true, /* detectJavaScriptImports */ true);
@@ -1017,6 +1032,16 @@ namespace ts {
                 });
         }
 
+        public getAutomaticTypeDirectiveNames(compilerOptionsJson: string): string {
+            return this.forwardJSONCall(
+                `getAutomaticTypeDirectiveNames('${compilerOptionsJson}')`,
+                () => {
+                    const compilerOptions = <CompilerOptions>JSON.parse(compilerOptionsJson);
+                    return getAutomaticTypeDirectiveNames(compilerOptions, this.host);
+                }
+            );
+        }
+
         private convertFileReferences(refs: FileReference[]): IFileReference[] {
             if (!refs) {
                 return undefined;