add activation event

Author: Meowcolm024

CHANGELOG.md

@@ -8,6 +8,7 @@ Check [Keep a Changelog](http://keepachangelog.com/) for recommendations on how
 
 - fix typo
 - use absolute path for GHCi
+- add activation event (in a stack project)
 
 ## [0.1.2]
 

package.json

@@ -20,6 +20,7 @@
     "activationEvents": [
         "onLanguage:haskell",
         "onLanguage:literate haskell",
+        "workspaceContains:stack.yaml",
         "onCommand:runner2.ghci"
     ],
     "main": "./out/extension.js",

src/extension.ts

@@ -55,7 +55,8 @@ export async function activate(context: vscode.ExtensionContext) {
             util.statButton("Stack Test", "runner2.stacktest")
         );
         if (config.enableStackRun) {
-            context.subscriptions.push(util.statButton("Stack Run", "runner2.stackrun"));
+            context.subscriptions.push(
+                util.statButton("Stack Run", "runner2.stackrun"));
         }
     }