fix(github): injection when editFileButton is null (#68)

Author: andreafalzetti

README.md

@@ -46,8 +46,8 @@ For Chrome:
 For Firefox
 
 1. Open Firefox
-1. Click Preferences -> Extensions & Themes 
-1. Click on the cog icon -> Install Add-on From File -> Select the `gitpod.xpi` file
+1. Go to `about:debugging#/runtime/this-firefox`
+1. Click Load Temporary Add-on -> Select the `gitpod.xpi` file
 
 For Safari (Experimental 🧪)
 

manifest.json

@@ -2,7 +2,7 @@
   "manifest_version": 2,
   "name": "Gitpod - Always ready to code",
   "short_name": "Gitpod",
-  "version": "1.16",
+  "version": "1.17",
   "description": "Spin up fresh, automated dev environments for each task, in the cloud, in seconds.",
   "icons": {
     "16": "icons/gitpod-logo-16.png",

src/injectors/github-injector.ts

@@ -122,7 +122,9 @@ abstract class ButtonInjectorBase implements ButtonInjector {
 
         // Edit File Menu Options - Open in Gitpod
         const editFileButton = document.querySelector('.Box-header .select-menu .SelectMenu-list') as ParentNode;
-        editFileButton.prepend(this.renderEditButton(currentUrl, openAsPopup));
+        if (editFileButton) {
+            editFileButton.prepend(this.renderEditButton(currentUrl, openAsPopup));
+        }
     }
 
     protected renderButton(url: string, openAsPopup: boolean): HTMLElement {