Merge pull request #20464 from RyanCavanaugh/fix20402

Don't add ambiently declared modules to ATA's unresolvedModules list

src/compiler/program.ts

@@ -704,7 +704,7 @@ namespace ts {
 
         interface OldProgramState {
             program: Program | undefined;
-            file: SourceFile;
+            oldSourceFile: SourceFile | undefined;
             /** The collection of paths modified *since* the old program. */
             modifiedFilePaths: Path[];
         }
@@ -754,7 +754,6 @@ namespace ts {
             /** A transient placeholder used to mark predicted resolution in the result list. */
             const predictedToResolveToAmbientModuleMarker: ResolvedModuleFull = <any>{};
 
-
             for (let i = 0; i < moduleNames.length; i++) {
                 const moduleName = moduleNames[i];
                 // If the source file is unchanged and doesnt have invalidated resolution, reuse the module resolutions
@@ -825,9 +824,13 @@ namespace ts {
             // If we change our policy of rechecking failed lookups on each program create,
             // we should adjust the value returned here.
             function moduleNameResolvesToAmbientModuleInNonModifiedFile(moduleName: string, oldProgramState: OldProgramState): boolean {
-                const resolutionToFile = getResolvedModule(oldProgramState.file, moduleName);
-                if (resolutionToFile) {
-                    // module used to be resolved to file - ignore it
+                const resolutionToFile = getResolvedModule(oldProgramState.oldSourceFile, moduleName);
+                const resolvedFile = resolutionToFile && oldProgramState.program && oldProgramState.program.getSourceFile(resolutionToFile.resolvedFileName);
+                if (resolutionToFile && resolvedFile && !resolvedFile.externalModuleIndicator) {
+                    // In the old program, we resolved to an ambient module that was in the same
+                    //   place as we expected to find an actual module file.
+                    // We actually need to return 'false' here even though this seems like a 'true' case
+                    //   because the normal module resolution algorithm will find this anyway.
                     return false;
                 }
                 const ambientModule = oldProgramState.program && oldProgramState.program.getTypeChecker().tryFindAmbientModuleWithoutAugmentations(moduleName);
@@ -1001,7 +1004,7 @@ namespace ts {
                 const newSourceFilePath = getNormalizedAbsolutePath(newSourceFile.fileName, currentDirectory);
                 if (resolveModuleNamesWorker) {
                     const moduleNames = getModuleNames(newSourceFile);
-                    const oldProgramState = { program: oldProgram, file: oldSourceFile, modifiedFilePaths };
+                    const oldProgramState: OldProgramState = { program: oldProgram, oldSourceFile, modifiedFilePaths };
                     const resolutions = resolveModuleNamesReusingOldState(moduleNames, newSourceFilePath, newSourceFile, oldProgramState);
                     // ensure that module resolution results are still correct
                     const resolutionsChanged = hasChangesInResolutions(moduleNames, resolutions, oldSourceFile.resolvedModules, moduleResolutionIsEqualTo);
@@ -1945,7 +1948,7 @@ namespace ts {
             if (file.imports.length || file.moduleAugmentations.length) {
                 // Because global augmentation doesn't have string literal name, we can check for global augmentation as such.
                 const moduleNames = getModuleNames(file);
-                const oldProgramState = { program: oldProgram, file, modifiedFilePaths };
+                const oldProgramState: OldProgramState = { program: oldProgram, oldSourceFile: oldProgram && oldProgram.getSourceFile(file.fileName), modifiedFilePaths };
                 const resolutions = resolveModuleNamesReusingOldState(moduleNames, getNormalizedAbsolutePath(file.fileName, currentDirectory), file, oldProgramState);
                 Debug.assert(resolutions.length === moduleNames.length);
                 for (let i = 0; i < moduleNames.length; i++) {

src/harness/unittests/reuseProgramStructure.ts

@@ -389,6 +389,19 @@ namespace ts {
             checkResolvedModulesCache(program4, "a.ts", createMapFromTemplate({ b: createResolvedModule("b.ts"), c: undefined }));
         });
 
+        it("set the resolvedImports after re-using an ambient external module declaration", () => {
+            const files = [
+                { name: "/a.ts", text: SourceText.New("", "", 'import * as a from "a";') },
+                { name: "/types/zzz/index.d.ts", text: SourceText.New("", "", 'declare module "a" { }') },
+            ];
+            const options: CompilerOptions = { target, typeRoots: ["/types"] };
+            const program1 = newProgram(files, ["/a.ts"], options);
+            const program2 = updateProgram(program1, ["/a.ts"], options, files => {
+                files[0].text = files[0].text.updateProgram('import * as aa from "a";');
+            });
+            assert.isDefined(program2.getSourceFile("/a.ts").resolvedModules.get("a"), "'a' is not an unresolved module after re-use");
+        });
+
         it("resolved type directives cache follows type directives", () => {
             const files = [
                 { name: "/a.ts", text: SourceText.New("/// <reference types='typedefs'/>", "", "var x = $") },

src/harness/unittests/typingsInstaller.ts

@@ -228,6 +228,37 @@ namespace ts.projectSystem {
             projectService.checkNumberOfProjects({ externalProjects: 1 });
         });
 
+        it("external project - deduplicate from local @types packages", () => {
+            const appJs = {
+                path: "/a/b/app.js",
+                content: ""
+            };
+            const nodeDts = {
+                path: "/node_modules/@types/node/index.d.ts",
+                content: "declare var node;"
+            };
+            const host = createServerHost([appJs, nodeDts]);
+            const installer = new (class extends Installer {
+                constructor() {
+                    super(host, { typesRegistry: createTypesRegistry("node") });
+                }
+                installWorker() {
+                    assert(false, "nothing should get installed");
+                }
+            })();
+
+            const projectFileName = "/a/app/test.csproj";
+            const projectService = createProjectService(host, { typingsInstaller: installer });
+            projectService.openExternalProject({
+                projectFileName,
+                options: {},
+                rootFiles: [toExternalFile(appJs.path)],
+                typeAcquisition: { enable: true, include: ["node"] }
+            });
+            installer.checkPendingCommands(/*expectedCount*/ 0);
+            projectService.checkNumberOfProjects({ externalProjects: 1 });
+        });
+
         it("external project - no auto in typing acquisition, no .d.ts/js files", () => {
             const file1 = {
                 path: "/a/b/app.ts",

src/server/project.ts

@@ -506,6 +506,14 @@ namespace ts.server {
         }
         abstract getTypeAcquisition(): TypeAcquisition;
 
+        protected removeLocalTypingsFromTypeAcquisition(newTypeAcquisition: TypeAcquisition): TypeAcquisition {
+            if (!newTypeAcquisition || !newTypeAcquisition.include) {
+                // Nothing to filter out, so just return as-is
+                return newTypeAcquisition;
+            }
+            return { ...newTypeAcquisition, include: this.removeExistingTypings(newTypeAcquisition.include) };
+        }
+
         getExternalFiles(): SortedReadonlyArray<string> {
             return emptyArray as SortedReadonlyArray<string>;
         }
@@ -718,7 +726,8 @@ namespace ts.server {
             this.projectStateVersion++;
         }
 
-        private extractUnresolvedImportsFromSourceFile(file: SourceFile, result: Push<string>) {
+        /* @internal */
+        private extractUnresolvedImportsFromSourceFile(file: SourceFile, result: Push<string>, ambientModules: string[]) {
             const cached = this.cachedUnresolvedImportsPerFile.get(file.path);
             if (cached) {
                 // found cached result - use it and return
@@ -731,7 +740,7 @@ namespace ts.server {
             if (file.resolvedModules) {
                 file.resolvedModules.forEach((resolvedModule, name) => {
                     // pick unresolved non-relative names
-                    if (!resolvedModule && !isExternalModuleNameRelative(name)) {
+                    if (!resolvedModule && !isExternalModuleNameRelative(name) && !isAmbientlyDeclaredModule(name)) {
                         // for non-scoped names extract part up-to the first slash
                         // for scoped names - extract up to the second slash
                         let trimmed = name.trim();
@@ -748,6 +757,10 @@ namespace ts.server {
                 });
             }
             this.cachedUnresolvedImportsPerFile.set(file.path, unresolvedImports || emptyArray);
+
+            function isAmbientlyDeclaredModule(name: string) {
+                return ambientModules.some(m => m === name);
+            }
         }
 
         /**
@@ -777,8 +790,9 @@ namespace ts.server {
                 // 4. compilation settings were changed in the way that might affect module resolution - drop all caches and collect all data from the scratch
                 if (hasChanges || changedFiles.length) {
                     const result: string[] = [];
+                    const ambientModules = this.program.getTypeChecker().getAmbientModules().map(mod => stripQuotes(mod.getName()));
                     for (const sourceFile of this.program.getSourceFiles()) {
-                        this.extractUnresolvedImportsFromSourceFile(sourceFile, result);
+                        this.extractUnresolvedImportsFromSourceFile(sourceFile, result, ambientModules);
                     }
                     this.lastCachedUnresolvedImportsList = toDeduplicatedSortedArray(result);
                 }
@@ -804,6 +818,13 @@ namespace ts.server {
             return !hasChanges;
         }
 
+
+
+        protected removeExistingTypings(include: string[]): string[] {
+            const existing = ts.getAutomaticTypeDirectiveNames(this.getCompilerOptions(), this.directoryStructureHost);
+            return include.filter(i => existing.indexOf(i) < 0);
+        }
+
         private setTypings(typings: SortedReadonlyArray<string>): boolean {
             if (arrayIsEqualTo(this.typingFiles, typings)) {
                 return false;
@@ -1299,7 +1320,7 @@ namespace ts.server {
         }
 
         setTypeAcquisition(newTypeAcquisition: TypeAcquisition): void {
-            this.typeAcquisition = newTypeAcquisition;
+            this.typeAcquisition = this.removeLocalTypingsFromTypeAcquisition(newTypeAcquisition);
         }
 
         getTypeAcquisition() {
@@ -1445,7 +1466,7 @@ namespace ts.server {
             Debug.assert(!!newTypeAcquisition.include, "newTypeAcquisition.include may not be null/undefined");
             Debug.assert(!!newTypeAcquisition.exclude, "newTypeAcquisition.exclude may not be null/undefined");
             Debug.assert(typeof newTypeAcquisition.enable === "boolean", "newTypeAcquisition.enable may not be null/undefined");
-            this.typeAcquisition = newTypeAcquisition;
+            this.typeAcquisition = this.removeLocalTypingsFromTypeAcquisition(newTypeAcquisition);
         }
     }
 }

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

@@ -7295,6 +7295,7 @@ declare namespace ts.server {
         disableLanguageService(): void;
         getProjectName(): string;
         abstract getTypeAcquisition(): TypeAcquisition;
+        protected removeLocalTypingsFromTypeAcquisition(newTypeAcquisition: TypeAcquisition): TypeAcquisition;
         getExternalFiles(): SortedReadonlyArray<string>;
         getSourceFile(path: Path): SourceFile;
         close(): void;
@@ -7315,12 +7316,12 @@ declare namespace ts.server {
         removeFile(info: ScriptInfo, fileExists: boolean, detachFromProject: boolean): void;
         registerFileUpdate(fileName: string): void;
         markAsDirty(): void;
-        private extractUnresolvedImportsFromSourceFile(file, result);
         /**
          * Updates set of files that contribute to this project
          * @returns: true if set of files in the project stays the same and false - otherwise.
          */
         updateGraph(): boolean;
+        protected removeExistingTypings(include: string[]): string[];
         private setTypings(typings);
         private updateGraphWorker();
         private detachScriptInfoFromProject(uncheckedFileName);