Improve error message

Author: lgeiger

lib/main.js

@@ -1,4 +1,5 @@
 const cp = require("child_process");
+const { shell } = require("electron");
 const { AutoLanguageClient } = require("atom-languageclient");
 
 class PythonLanguageClient extends AutoLanguageClient {
@@ -18,7 +19,23 @@ class PythonLanguageClient extends AutoLanguageClient {
     childProcess.on("error", err =>
       atom.notifications.addError(
         "Unable to start the Python language server.",
-        { dismissable: true }
+        {
+          dismissable: true,
+          buttons: [
+            {
+              text: "Install Instructions",
+              onDidClick: () =>
+                atom.workspace.open("atom://config/packages/ide-python")
+            },
+            {
+              text: "Download Python",
+              onDidClick: () =>
+                shell.openExternal("https://www.python.org/downloads/")
+            }
+          ],
+          description:
+            "This can occur if you do not have Python installed or if it is not in your path.\n\n Make sure to install `pyls` by running:\n```\npip install python-language-server\n```"
+        }
       )
     );
     return childProcess;