Support cleanup of old version after install

Depends on clangd/node-clangd#12

Author: sam-mccall

package.json

@@ -44,7 +44,7 @@
         "git-clang-format": "git-clang-format"
     },
     "dependencies": {
-        "@clangd/install": "0.1.4",
+        "@clangd/install": "1.0.0",
         "abort-controller": "^3.0.0",
         "vscode-languageclient": "7.1.0-next.1"
     },

src/clangd-context.ts

@@ -59,9 +59,9 @@ export class ClangdContext implements vscode.Disposable {
   client!: ClangdLanguageClient;
 
   async activate(globalStoragePath: string, outputChannel: vscode.OutputChannel,
-                 workspaceState: vscode.Memento) {
-    const clangdPath =
-        await install.activate(this, globalStoragePath, workspaceState);
+                 workspaceState: vscode.Memento, globalState: vscode.Memento) {
+    const clangdPath = await install.activate(this, globalStoragePath,
+                                              workspaceState, globalState);
     if (!clangdPath)
       return;
 

src/extension.ts

@@ -21,11 +21,12 @@ export async function activate(context: vscode.ExtensionContext) {
       vscode.commands.registerCommand('clangd.restart', async () => {
         await clangdContext.dispose();
         await clangdContext.activate(context.globalStoragePath, outputChannel,
-                                     context.workspaceState);
+                                     context.workspaceState,
+                                     context.globalState);
       }));
 
   await clangdContext.activate(context.globalStoragePath, outputChannel,
-                               context.workspaceState);
+                               context.workspaceState, context.globalState);
 
   const shouldCheck = vscode.workspace.getConfiguration('clangd').get(
       'detectExtensionConflicts');

src/install.ts

@@ -12,11 +12,12 @@ import * as config from './config';
 // Returns the clangd path to be used, or null if clangd is not installed.
 export async function activate(
     context: ClangdContext, globalStoragePath: string,
-    workspaceState: vscode.Memento): Promise<string|null> {
+    workspaceState: vscode.Memento,
+    globalState: vscode.Memento): Promise<string|null> {
   // If the workspace overrides clangd.path, give the user a chance to bless it.
   await config.getSecureOrPrompt<string>('path', workspaceState);
 
-  const ui = new UI(context, globalStoragePath, workspaceState);
+  const ui = new UI(context, globalStoragePath, workspaceState, globalState);
   context.subscriptions.push(vscode.commands.registerCommand(
       'clangd.install', async () => common.installLatest(ui)));
   context.subscriptions.push(vscode.commands.registerCommand(
@@ -27,7 +28,8 @@ export async function activate(
 
 class UI {
   constructor(private context: ClangdContext, private globalStoragePath: string,
-              private workspaceState: vscode.Memento) {}
+              private workspaceState: vscode.Memento,
+              private globalState: vscode.Memento) {}
 
   get storagePath(): string { return this.globalStoragePath; }
   async choose(prompt: string, options: string[]): Promise<string|undefined> {
@@ -86,6 +88,21 @@ class UI {
     }
   }
 
+  async promptDelete(path: string): Promise<boolean|undefined> {
+    const message = `Delete the previous clangd installation? ${path}`;
+    const remove = 'Delete it';
+    const preserve = 'Keep it';
+    const response =
+        await vscode.window.showInformationMessage(message, remove, preserve);
+    if (response === remove) {
+      return true;
+    } else if (response === preserve) {
+      return false;
+    } else {
+      return undefined; // User dismissed prompt, bail out.
+    }
+  }
+
   async promptReload(message: string) {
     if (await vscode.window.showInformationMessage(message, 'Reload window'))
       vscode.commands.executeCommand('workbench.action.reloadWindow');
@@ -136,4 +153,11 @@ class UI {
   set clangdPath(p: string) {
     config.update('path', p, vscode.ConfigurationTarget.Global);
   }
+
+  get cleanupPath(): string|undefined {
+    return this.globalState.get<string>('clangd.install.cleanupPath');
+  }
+  set cleanupPath(p: string|undefined) {
+    this.globalState.update('clangd.install.cleanupPath', p);
+  }
 }