add command for rebuild all project structure

src/server/editorServices.ts

@@ -621,7 +621,10 @@ namespace ts.server {
 
                 let fileNames = project.getFileNames();
                 for (let fileName of fileNames) {
-                    this.getScriptInfo(fileName).defaultProject = undefined;
+                    let info = this.getScriptInfo(fileName);
+                    if (info.defaultProject == project){
+                        info.defaultProject = undefined;
+                    }
                 }
         }
 
@@ -766,6 +769,19 @@ namespace ts.server {
             return referencingProjects;
         }
 
+        rebuildProjectStructure() {
+            // First check if there is new tsconfig file added for inferred project roots
+            for (let info of this.openFileRoots) {
+                this.openOrUpdateConfiguredProjectForFile(info.fileName);
+            }
+            this.updateProjectStructure();
+        }
+
+        /**
+         * This function is to update the project structure for every projects. 
+         * It is called on the premise that all the configured projects are 
+         * up to date.
+         */
         updateProjectStructure() {
             this.log("updating project structure from ...", "Info");
             this.printProjects();
@@ -912,10 +928,6 @@ namespace ts.server {
             let configFileName = this.findConfigFile(searchPath);
             if (configFileName) {
                 this.log("Config file name: " + configFileName, "Info");
-            } else {
-                this.log("no config file");
-            }
-            if (configFileName) {
                 let project = this.findConfiguredProjectByConfigFile(configFileName);
                 if (!project) {
                     var configResult = this.openConfigFile(configFileName, fileName);
@@ -931,6 +943,9 @@ namespace ts.server {
                     this.updateConfiguredProject(project);
                 }
             }
+            else {
+                this.log("No config files found.");
+            }
         }
 
         /**

src/server/session.ts

@@ -100,6 +100,7 @@ namespace ts.server {
         export const SignatureHelp = "signatureHelp";
         export const TypeDefinition = "typeDefinition";
         export const ProjectInfo = "projectInfo";
+        export const RebuildProjects = "rebuildProjects";
         export const Unknown = "unknown";
     }
 
@@ -226,6 +227,10 @@ namespace ts.server {
             this.syntacticCheck(file, project);
             this.semanticCheck(file, project);
         }
+        
+        private rebuildProjectStructure() {
+            this.projectService.rebuildProjectStructure();
+        }
 
         private updateProjectStructure(seq: number, matchSeq: (seq: number) => boolean, ms = 1500) {
             setTimeout(() => {
@@ -1033,6 +1038,10 @@ namespace ts.server {
                 var { file, needFileNameList } = <protocol.ProjectInfoRequestArgs>request.arguments;
                 return {response: this.getProjectInfo(file, needFileNameList), responseRequired: true};
             },
+            [CommandNames.RebuildProjects]: (request: protocol.Request) => {
+                this.rebuildProjectStructure();
+                return {responseRequired: false};
+            }
         };
         public addProtocolHandler(command: string, handler: (request: protocol.Request) => {response?: any, responseRequired: boolean}) {
             if (this.handlers[command]) {