[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/compiler/program.ts

@@ -1055,19 +1055,15 @@ namespace ts {
         return resolutions;
     }
 
-    function getInferredTypesRoot(options: CompilerOptions, rootFiles: string[], host: CompilerHost) {
-        return computeCommonSourceDirectoryOfFilenames(rootFiles, host.getCurrentDirectory(), f => host.getCanonicalFileName(f));
-    }
-
     /**
-      * Given a set of options and a set of root files, returns the set of type directive names
+      * Given a set of options, returns the set of type directive names
       *   that should be included for this program automatically.
       * This list could either come from the config file,
       *   or from enumerating the types root + initial secondary types lookup location.
       * More type directives might appear in the program later as a result of loading actual source files;
       *   this list is only the set of defaults that are implicitly included.
       */
-    export function getAutomaticTypeDirectiveNames(options: CompilerOptions, rootFiles: string[], host: CompilerHost): string[] {
+    export function getAutomaticTypeDirectiveNames(options: CompilerOptions, host: ModuleResolutionHost): string[] {
         // Use explicit type list from tsconfig.json
         if (options.types) {
             return options.types;
@@ -1080,7 +1076,10 @@ namespace ts {
             if (typeRoots) {
                 for (const root of typeRoots) {
                     if (host.directoryExists(root)) {
-                        result = result.concat(host.getDirectories(root));
+                        for (const typeDirectivePath of host.getDirectories(root)) {
+                            // Return just the type directive names
+                            result = result.concat(getBaseFileName(normalizePath(typeDirectivePath)));
+                        }
                     }
                 }
             }
@@ -1155,11 +1154,11 @@ namespace ts {
             forEach(rootNames, name => processRootFile(name, /*isDefaultLib*/ false));
 
             // load type declarations specified via 'types' argument or implicitly from types/ and node_modules/@types folders
-            const typeReferences: string[] = getAutomaticTypeDirectiveNames(options, rootNames, host);
+            const typeReferences: string[] = getAutomaticTypeDirectiveNames(options, host);
 
             if (typeReferences) {
-                const inferredRoot = getInferredTypesRoot(options, rootNames, host);
-                const containingFilename = combinePaths(inferredRoot, "__inferred type names__.ts");
+                // This containingFilename needs to match with the one used in managed-side
+                const containingFilename = combinePaths(host.getCurrentDirectory(), "__inferred type names__.ts");
                 const resolutions = resolveTypeReferenceDirectiveNamesWorker(typeReferences, containingFilename);
                 for (let i = 0; i < typeReferences.length; i++) {
                     processTypeReferenceDirective(typeReferences[i], resolutions[i]);

src/compiler/types.ts

@@ -2910,6 +2910,7 @@ namespace ts {
         directoryExists?(directoryName: string): boolean;
         realpath?(path: string): string;
         getCurrentDirectory?(): string;
+        getDirectories?(path: string): string[];
     }
 
     export interface ResolvedModule {

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;