Add restart vue language service command

.github/PERF_ISSUE.md

@@ -1,6 +1,8 @@
 # Performance Issue Reporting
 
-Performance issues are hard to track down, and a good report is necessary for fixing them.
+Performance issues are hard to track down, and a good report is crucial for fixing them.
+
+Although you can use the command `Vetur: Restart VLS (Vue Language Server)` to restart VLS and temporarily avoid performance issues, we would appreciate it if you can file a report to help us fix the issue.
 
 In addition to the normal issues, please include a profile in performance-related issues and below information:
 

CHANGELOG.md

@@ -7,6 +7,7 @@
 - 🙌 Fix collapse code missing end mark. Thanks to contribution from [@yoyo930021](https://github.com/yoyo930021). #2303 and #2352.
 - 🙌 Reduce recreate ts program when no need for ts perf. Thanks to contribution from [@yoyo930021](https://github.com/yoyo930021). #2192 and #2328.
 - 🙌 Display VTI errors. Thanks to contribution from [@yoyo930021](https://github.com/yoyo930021). #2324 and #2330.
+- 🙌 Add restart vue language service command. Thanks to contribution from [@yoyo930021](https://github.com/yoyo930021). #2331.
 
 ### 0.28.0 | 2020-09-23 | [VSIX](https://marketplace.visualstudio.com/_apis/public/gallery/publishers/octref/vsextensions/vetur/0.28.0/vspackage)
 

README.md

@@ -77,6 +77,7 @@ Thanks to the following companies for supporting Vetur's development:
 
 - No multi root suppport yet ([#424](https://github.com/vuejs/vetur/issues/424))
 - Cannot handle tsconfig from non-top-level folder ([#815](https://github.com/vuejs/vetur/issues/815))
+- You can restart Vue language service when Vetur slow ([#2192](https://github.com/vuejs/vetur/issues/2192))
 
 ## Roadmap
 

client/vueMain.ts

@@ -53,11 +53,16 @@ export async function activate(context: vscode.ExtensionContext) {
     .then(() => {
       registerCustomClientNotificationHandlers(client);
       registerCustomLSPCommands(context, client);
+      registerRestartVLSCommand(context, client);
     })
     .catch(e => {
       console.log('Client initialization failed');
     });
 
+  return displayInitProgress(promise);
+}
+
+async function displayInitProgress(promise: Promise<void>) {
   return vscode.window.withProgress(
     {
       title: 'Vetur initialization',
@@ -67,6 +72,19 @@ export async function activate(context: vscode.ExtensionContext) {
   );
 }
 
+function registerRestartVLSCommand(context: vscode.ExtensionContext, client: LanguageClient) {
+  context.subscriptions.push(
+    vscode.commands.registerCommand('vetur.restartVLS', () =>
+      displayInitProgress(
+        client
+          .stop()
+          .then(() => client.start())
+          .then(() => client.onReady())
+      )
+    )
+  );
+}
+
 function registerCustomClientNotificationHandlers(client: LanguageClient) {
   client.onNotification('$/displayInfo', (msg: string) => {
     vscode.window.showInformationMessage(msg);

docs/FAQ.md

@@ -110,3 +110,9 @@ Now you'll find `vetur-{version}.vsix`, you can install it by editor command "In
 
 You can enable `Vetur: Use Workspace Dependencies` setting so that it uses the same version of TypeScript in your workspace.
 NB: It will use `typescript.tsdk` setting as the path to look for if defined, defaulting to `node_modules/typescript`. This enables tools like Yarn PnP to set their own custom resolver.
+
+## Vetur is slow
+
+You can run the command `Vetur: Restart VLS (Vue Language Server)` to restart VLS.
+
+However, we'd appreciate it if you can file a [performance issue report with a profile](https://github.com/vuejs/vetur/blob/master/.github/PERF_ISSUE.md) to help us fix the issue.

package.json

@@ -67,6 +67,10 @@
   "main": "./dist/client/vueMain",
   "contributes": {
     "commands": [
+      {
+        "command": "vetur.restartVLS",
+        "title": "Vetur: Restart VLS (Vue Language Server)"
+      },
       {
         "command": "vetur.generateGrammar",
         "title": "Vetur: Generate grammar from `vetur.grammar.customBlocks`"