added openExternalProjects method

src/server/protocol.d.ts

@@ -586,6 +586,14 @@ declare namespace ts.server.protocol {
         projectFileName: string;
     }
 
+    export interface OpenExternalProjectsRequest extends Request {
+        arguments: OpenExternalProjectsArgs;
+    }
+
+    export interface OpenExternalProjectsArgs {
+        projects: ExternalProject[];
+    }
+
     export interface CloseExternalProjectRequest extends Request {
         arguments: CloseExternalProjectRequestArgs;
     }

src/server/session.ts

@@ -128,6 +128,7 @@ namespace ts.server {
         export const ReloadProjects = "reloadProjects";
         export const Unknown = "unknown";
         export const OpenExternalProject = "openExternalProject";
+        export const OpenExternalProjects = "openExternalProjects";
         export const CloseExternalProject = "closeExternalProject";
         export const SynchronizeProjectList = "synchronizeProjectList";
         export const ApplyChangedToOpenFiles = "applyChangedToOpenFiles";
@@ -1041,7 +1042,13 @@ namespace ts.server {
 
         private handlers: Map<(request: protocol.Request) => { response?: any, responseRequired?: boolean }> = {
             [CommandNames.OpenExternalProject]: (request: protocol.OpenExternalProjectRequest) => {
-                const deltas = this.projectService.openExternalProject(request.arguments);
+                this.projectService.openExternalProject(request.arguments);
+                return this.notRequired();
+            },
+            [CommandNames.OpenExternalProjects]: (request: protocol.OpenExternalProjectsRequest) => {
+                for (const proj of request.arguments.projects) {
+                    this.projectService.openExternalProject(proj);
+                }
                 return this.notRequired();
             },
             [CommandNames.CloseExternalProject]: (request: protocol.CloseExternalProjectRequest) => {