Delay load configured project referenced from external project when opening it

src/server/project.ts

@@ -149,6 +149,8 @@ namespace ts.server {
          */
         private projectStateVersion = 0;
 
+        protected isInitialLoadPending: () => boolean = returnFalse;
+
         /*@internal*/
         dirty = false;
 
@@ -1033,7 +1035,10 @@ namespace ts.server {
 
         /* @internal */
         getChangesSinceVersion(lastKnownVersion?: number): ProjectFilesWithTSDiagnostics {
-            updateProjectIfDirty(this);
+            // Update the graph only if initial configured project load is not pending
+            if (!this.isInitialLoadPending()) {
+                updateProjectIfDirty(this);
+            }
 
             const info: protocol.ProjectVersionInfo = {
                 projectName: this.getProjectName(),
@@ -1091,9 +1096,8 @@ namespace ts.server {
             this.rootFilesMap.delete(info.path);
         }
 
-        protected enableGlobalPlugins() {
+        protected enableGlobalPlugins(options: CompilerOptions) {
             const host = this.projectService.host;
-            const options = this.getCompilationSettings();
 
             if (!host.require) {
                 this.projectService.logger.info("Plugins were requested but not running in environment that supports 'require'. Nothing will be loaded");
@@ -1244,7 +1248,7 @@ namespace ts.server {
             if (!projectRootPath && !projectService.useSingleInferredProject) {
                 this.canonicalCurrentDirectory = projectService.toCanonicalFileName(this.currentDirectory);
             }
-            this.enableGlobalPlugins();
+            this.enableGlobalPlugins(this.getCompilerOptions());
         }
 
         addRoot(info: ScriptInfo) {
@@ -1316,46 +1320,53 @@ namespace ts.server {
 
         private projectErrors: Diagnostic[] | undefined;
 
+        private projectReferences: ReadonlyArray<ProjectReference> | undefined;
+
+        /*@internal*/
+        projectOptions?: ProjectOptions | true;
+
+        protected isInitialLoadPending: () => boolean = returnTrue;
+
         /*@internal*/
         constructor(configFileName: NormalizedPath,
             projectService: ProjectService,
             documentRegistry: DocumentRegistry,
-            hasExplicitListOfFiles: boolean,
-            compilerOptions: CompilerOptions,
-            lastFileExceededProgramSize: string | undefined,
-            public compileOnSaveEnabled: boolean,
-            cachedDirectoryStructureHost: CachedDirectoryStructureHost,
-            private projectReferences: ReadonlyArray<ProjectReference> | undefined) {
+            cachedDirectoryStructureHost: CachedDirectoryStructureHost) {
             super(configFileName,
                 ProjectKind.Configured,
                 projectService,
                 documentRegistry,
-                hasExplicitListOfFiles,
-                lastFileExceededProgramSize,
-                compilerOptions,
-                compileOnSaveEnabled,
+                /*hasExplicitListOfFiles*/ false,
+                /*lastFileExceededProgramSize*/ undefined,
+                /*compilerOptions*/ {},
+                /*compileOnSaveEnabled*/ false,
                 cachedDirectoryStructureHost,
                 getDirectoryPath(configFileName));
             this.canonicalConfigFilePath = asNormalizedPath(projectService.toCanonicalFileName(configFileName));
-            this.enablePlugins();
         }
 
         /**
          * If the project has reload from disk pending, it reloads (and then updates graph as part of that) instead of just updating the graph
          * @returns: true if set of files in the project stays the same and false - otherwise.
          */
         updateGraph(): boolean {
+            this.isInitialLoadPending = returnFalse;
             const reloadLevel = this.pendingReload;
             this.pendingReload = ConfigFileProgramReloadLevel.None;
+            let result: boolean;
             switch (reloadLevel) {
                 case ConfigFileProgramReloadLevel.Partial:
-                    return this.projectService.reloadFileNamesOfConfiguredProject(this);
+                    result = this.projectService.reloadFileNamesOfConfiguredProject(this);
+                    break;
                 case ConfigFileProgramReloadLevel.Full:
                     this.projectService.reloadConfiguredProject(this);
-                    return true;
+                    result = true;
+                    break;
                 default:
-                    return super.updateGraph();
+                    result = super.updateGraph();
             }
+            this.projectService.sendProjectTelemetry(this);
+            return result;
         }
 
         /*@internal*/
@@ -1382,8 +1393,12 @@ namespace ts.server {
         }
 
         enablePlugins() {
+            this.enablePluginsWithOptions(this.getCompilerOptions());
+        }
+
+        /*@internal*/
+        enablePluginsWithOptions(options: CompilerOptions) {
             const host = this.projectService.host;
-            const options = this.getCompilationSettings();
 
             if (!host.require) {
                 this.projectService.logger.info("Plugins were requested but not running in environment that supports 'require'. Nothing will be loaded");
@@ -1407,7 +1422,7 @@ namespace ts.server {
                 }
             }
 
-            this.enableGlobalPlugins();
+            this.enableGlobalPlugins(options);
         }
 
         /**
@@ -1547,6 +1562,12 @@ namespace ts.server {
                 getDirectoryPath(projectFilePath || normalizeSlashes(externalProjectName)));
         }
 
+        updateGraph() {
+            const result = super.updateGraph();
+            this.projectService.sendProjectTelemetry(this);
+            return result;
+        }
+
         getExcludedFiles() {
             return this.excludedFiles;
         }

src/server/utilities.ts

@@ -120,6 +120,7 @@ namespace ts.server {
         };
     }
 
+    /*@internal*/
     export interface ProjectOptions {
         configHasExtendsProperty: boolean;
         /**
@@ -128,16 +129,6 @@ namespace ts.server {
         configHasFilesProperty: boolean;
         configHasIncludeProperty: boolean;
         configHasExcludeProperty: boolean;
-
-        projectReferences: ReadonlyArray<ProjectReference> | undefined;
-        /**
-         * these fields can be present in the project file
-         */
-        files?: string[];
-        wildcardDirectories?: Map<WatchDirectoryFlags>;
-        compilerOptions?: CompilerOptions;
-        typeAcquisition?: TypeAcquisition;
-        compileOnSave?: boolean;
     }
 
     export function isInferredProjectName(name: string) {

src/testRunner/unittests/telemetry.ts

@@ -68,6 +68,7 @@ namespace ts.projectSystem {
             }, "/hunter2/foo.csproj");
 
             // Also test that opening an external project only sends an event once.
+            et.service.closeClientFile(file1.path);
 
             et.service.closeExternalProject(projectFileName);
             checkNumberOfProjects(et.service, { externalProjects: 0 });
@@ -82,6 +83,7 @@ namespace ts.projectSystem {
                     projectFileName,
                 });
                 checkNumberOfProjects(et.service, { externalProjects: 1 });
+                et.service.openClientFile(file1.path); // Only on file open the project will be updated
             }
         });
 

src/testRunner/unittests/tsserverProjectSystem.ts

@@ -663,12 +663,15 @@ namespace ts.projectSystem {
                 options: {}
             });
             service.checkNumberOfProjects({ configuredProjects: 1 });
-            checkProjectActualFiles(configuredProjectAt(service, 0), [upperCaseConfigFilePath]);
+            const project = service.configuredProjects.get(config.path)!;
+            assert.equal(project.pendingReload, ConfigFileProgramReloadLevel.Full); // External project referenced configured project pending to be reloaded
+            checkProjectActualFiles(project, emptyArray);
 
             service.openClientFile(f1.path);
             service.checkNumberOfProjects({ configuredProjects: 1, inferredProjects: 1 });
 
-            checkProjectActualFiles(configuredProjectAt(service, 0), [upperCaseConfigFilePath]);
+            assert.equal(project.pendingReload, ConfigFileProgramReloadLevel.None); // External project referenced configured project is updated
+            checkProjectActualFiles(project, [upperCaseConfigFilePath]);
             checkProjectActualFiles(service.inferredProjects[0], [f1.path]);
         });
 
@@ -778,7 +781,7 @@ namespace ts.projectSystem {
 
             // Add a tsconfig file
             host.reloadFS(filesWithConfig);
-            host.checkTimeoutQueueLengthAndRun(1);
+            host.checkTimeoutQueueLengthAndRun(2); // load configured project from disk + ensureProjectsForOpenFiles
 
             projectService.checkNumberOfProjects({ inferredProjects: 2, configuredProjects: 1 });
             assert.isTrue(projectService.inferredProjects[0].isOrphan());
@@ -1229,7 +1232,7 @@ namespace ts.projectSystem {
 
 
             host.reloadFS([file1, configFile, file2, file3, libFile]);
-            host.checkTimeoutQueueLengthAndRun(1);
+            host.checkTimeoutQueueLengthAndRun(2); // load configured project from disk + ensureProjectsForOpenFiles
             checkNumberOfConfiguredProjects(projectService, 1);
             checkNumberOfInferredProjects(projectService, 1);
             checkProjectActualFiles(projectService.inferredProjects[0], [file2.path, file3.path, libFile.path]);
@@ -1893,7 +1896,7 @@ namespace ts.projectSystem {
             checkProjectActualFiles(projectService.inferredProjects[1], [file3.path]);
 
             host.reloadFS([file1, file2, file3, configFile]);
-            host.checkTimeoutQueueLengthAndRun(1);
+            host.checkTimeoutQueueLengthAndRun(2); // load configured project from disk + ensureProjectsForOpenFiles
             checkNumberOfProjects(projectService, { configuredProjects: 1, inferredProjects: 2 });
             checkProjectActualFiles(configuredProjectAt(projectService, 0), [file1.path, file2.path, file3.path, configFile.path]);
             assert.isTrue(projectService.inferredProjects[0].isOrphan());
@@ -2973,10 +2976,7 @@ namespace ts.projectSystem {
             checkNumberOfProjects(projectService, { configuredProjects: 1, externalProjects: 0, inferredProjects: 0 });
 
             const configProject = configuredProjectAt(projectService, 0);
-            checkProjectActualFiles(configProject, [libFile.path, configFile.path]);
-
-            const diagnostics = configProject.getAllProjectErrors();
-            assert.equal(diagnostics[0].code, Diagnostics.No_inputs_were_found_in_config_file_0_Specified_include_paths_were_1_and_exclude_paths_were_2.code);
+            checkProjectActualFiles(configProject, []); // Since no files opened from this project, its not loaded
 
             host.reloadFS([libFile, site]);
             host.checkTimeoutQueueLengthAndRun(1);
@@ -3334,6 +3334,9 @@ namespace ts.projectSystem {
             checkNumberOfProjects(projectService, { configuredProjects: 1 });
 
             const configuredProject = configuredProjectAt(projectService, 0);
+            // configured project is just created and not yet loaded
+            checkProjectActualFiles(configuredProject, emptyArray);
+            projectService.ensureInferredProjectsUpToDate_TestOnly();
             checkProjectActualFiles(configuredProject, [file1.path, tsconfig.path]);
 
             // Allow allowNonTsExtensions will be set to true for deferred extensions.
@@ -3975,6 +3978,8 @@ namespace ts.projectSystem {
                 options: {}
             });
             projectService.checkNumberOfProjects({ configuredProjects: 1 });
+            checkProjectActualFiles(configuredProjectAt(projectService, 0), emptyArray); // Configured project created but not loaded till actually needed
+            projectService.ensureInferredProjectsUpToDate_TestOnly();
             checkProjectActualFiles(configuredProjectAt(projectService, 0), [f1.path, tsconfig.path]);
 
             // rename tsconfig.json back to lib.ts
@@ -4032,6 +4037,9 @@ namespace ts.projectSystem {
                 options: {}
             });
             projectService.checkNumberOfProjects({ configuredProjects: 2 });
+            checkProjectActualFiles(configuredProjectAt(projectService, 0), emptyArray); // Configured project created but not loaded till actually needed
+            checkProjectActualFiles(configuredProjectAt(projectService, 1), emptyArray); // Configured project created but not loaded till actually needed
+            projectService.ensureInferredProjectsUpToDate_TestOnly();
             checkProjectActualFiles(configuredProjectAt(projectService, 0), [cLib.path, cTsconfig.path]);
             checkProjectActualFiles(configuredProjectAt(projectService, 1), [dLib.path, dTsconfig.path]);
 
@@ -4063,6 +4071,9 @@ namespace ts.projectSystem {
                 options: {}
             });
             projectService.checkNumberOfProjects({ configuredProjects: 2 });
+            checkProjectActualFiles(configuredProjectAt(projectService, 0), emptyArray); // Configured project created but not loaded till actually needed
+            checkProjectActualFiles(configuredProjectAt(projectService, 1), emptyArray); // Configured project created but not loaded till actually needed
+            projectService.ensureInferredProjectsUpToDate_TestOnly();
             checkProjectActualFiles(configuredProjectAt(projectService, 0), [cLib.path, cTsconfig.path]);
             checkProjectActualFiles(configuredProjectAt(projectService, 1), [dLib.path, dTsconfig.path]);
 

src/testRunner/unittests/typingsInstaller.ts

@@ -430,7 +430,6 @@ namespace ts.projectSystem {
 
             const p = projectService.externalProjects[0];
             projectService.checkNumberOfProjects({ externalProjects: 1 });
-
             checkProjectActualFiles(p, [jqueryJs.path]);
 
             installer.checkPendingCommands(/*expectedCount*/ 0);

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

@@ -5748,24 +5748,6 @@ declare namespace ts.server {
         remove(path: NormalizedPath): void;
     }
     function createNormalizedPathMap<T>(): NormalizedPathMap<T>;
-    interface ProjectOptions {
-        configHasExtendsProperty: boolean;
-        /**
-         * true if config file explicitly listed files
-         */
-        configHasFilesProperty: boolean;
-        configHasIncludeProperty: boolean;
-        configHasExcludeProperty: boolean;
-        projectReferences: ReadonlyArray<ProjectReference> | undefined;
-        /**
-         * these fields can be present in the project file
-         */
-        files?: string[];
-        wildcardDirectories?: Map<WatchDirectoryFlags>;
-        compilerOptions?: CompilerOptions;
-        typeAcquisition?: TypeAcquisition;
-        compileOnSave?: boolean;
-    }
     function isInferredProjectName(name: string): boolean;
     function makeInferredProjectName(counter: number): string;
     function createSortedArray<T>(): SortedArray<T>;
@@ -8216,6 +8198,7 @@ declare namespace ts.server {
          * This property is different from projectStructureVersion since in most cases edits don't affect set of files in the project
          */
         private projectStateVersion;
+        protected isInitialLoadPending: () => boolean;
         private readonly cancellationToken;
         isNonTsProject(): boolean;
         isJsOnlyProject(): boolean;
@@ -8300,7 +8283,7 @@ declare namespace ts.server {
         filesToString(writeProjectFileNames: boolean): string;
         setCompilerOptions(compilerOptions: CompilerOptions): void;
         protected removeRoot(info: ScriptInfo): void;
-        protected enableGlobalPlugins(): void;
+        protected enableGlobalPlugins(options: CompilerOptions): void;
         protected enablePlugin(pluginConfigEntry: PluginImport, searchPaths: string[]): void;
         /** Starts a new check for diagnostics. Call this if some file has updated that would cause diagnostics to be changed. */
         refreshDiagnostics(): void;
@@ -8329,14 +8312,14 @@ declare namespace ts.server {
      * Otherwise it will create an InferredProject.
      */
     class ConfiguredProject extends Project {
-        compileOnSaveEnabled: boolean;
-        private projectReferences;
         private typeAcquisition;
         private directoriesWatchedForWildcards;
         readonly canonicalConfigFilePath: NormalizedPath;
         /** Ref count to the project when opened from external project */
         private externalProjectRefCount;
         private projectErrors;
+        private projectReferences;
+        protected isInitialLoadPending: () => boolean;
         /**
          * If the project has reload from disk pending, it reloads (and then updates graph as part of that) instead of just updating the graph
          * @returns: true if set of files in the project stays the same and false - otherwise.
@@ -8369,6 +8352,7 @@ declare namespace ts.server {
         compileOnSaveEnabled: boolean;
         excludedFiles: ReadonlyArray<NormalizedPath>;
         private typeAcquisition;
+        updateGraph(): boolean;
         getExcludedFiles(): ReadonlyArray<NormalizedPath>;
         getTypeAcquisition(): TypeAcquisition;
         setTypeAcquisition(newTypeAcquisition: TypeAcquisition): void;
@@ -8661,15 +8645,13 @@ declare namespace ts.server {
         private findConfiguredProjectByProjectName;
         private getConfiguredProjectByCanonicalConfigFilePath;
         private findExternalProjectByProjectName;
-        private convertConfigFileContentToProjectOptions;
         /** Get a filename if the language service exceeds the maximum allowed program size; otherwise returns undefined. */
         private getFilenameForExceededTotalSizeLimitForNonTsFiles;
         private createExternalProject;
-        private sendProjectTelemetry;
-        private addFilesToNonInferredProjectAndUpdateGraph;
+        private addFilesToNonInferredProject;
         private createConfiguredProject;
         private updateNonInferredProjectFiles;
-        private updateNonInferredProject;
+        private updateRootAndOptionsOfNonInferredProject;
         private sendConfigFileDiagEvent;
         private getOrCreateInferredProjectForProjectRootPathIfEnabled;
         private getOrCreateSingleInferredProjectIfEnabled;