From 94033f212dcfca2a351b3b71d9e281d3e3f9789e Mon Sep 17 00:00:00 2001
From: Sheetal Nandi <shkamat@microsoft.com>
Date: Wed, 25 Jul 2018 13:32:27 -0700
Subject: [PATCH] If project name is specified in compile on save, do not
 update all projects to just use that project

---
 src/server/session.ts | 15 +++++++++++++--
 1 file changed, 13 insertions(+), 2 deletions(-)

diff --git a/src/server/session.ts b/src/server/session.ts
index aae9ab8980f..ea0bf21dc3e 100644
--- a/src/server/session.ts
+++ b/src/server/session.ts
@@ -1465,13 +1465,24 @@ namespace ts.server {
         }
 
         private getCompileOnSaveAffectedFileList(args: protocol.FileRequestArgs): ReadonlyArray<protocol.CompileOnSaveAffectedFileListSingleProject> {
-            const info = this.projectService.getScriptInfoEnsuringProjectsUptoDate(args.file);
+            let info: ScriptInfo | undefined;
+            let project: Project | undefined;
+            if (args.projectFileName) {
+                // Do not update all projects if we are looking for specific project to compile on save
+                project = this.projectService.findProject(args.projectFileName)!;
+                if (project.dirty) project.updateGraph();
+                info = this.projectService.getScriptInfo(args.file);
+            }
+            else {
+                info = this.projectService.getScriptInfoEnsuringProjectsUptoDate(args.file);
+            }
+
             if (!info) {
                 return emptyArray;
             }
 
             // if specified a project, we only return affected file list in this project
-            const projects = args.projectFileName ? [this.projectService.findProject(args.projectFileName)!] : info.containingProjects;
+            const projects = args.projectFileName ? [project!] : info.containingProjects;
             const symLinkedProjects = !args.projectFileName && this.projectService.getSymlinkedProjects(info);
             return combineProjectOutput(
                 info,