If gocode is panicking, prompt to update gocode

- Fixes #530
- Fixes #474
- Fixes #473
- Fixes #471
- Fixes #468
- Fixes #437
- Fixes #433
- Fixes #158
- Fixes joefitzgerald/autocomplete-go#43
- Fixes joefitzgerald/autocomplete-go#51
- Fixes joefitzgerald/autocomplete-go#52

Author: joefitzgerald

lib/autocomplete/gocodeprovider.js

@@ -3,6 +3,7 @@
 import {CompositeDisposable} from 'atom'
 import {isValidEditor} from '../utils'
 import _ from 'lodash'
+import os from 'os'
 
 class GocodeProvider {
   constructor (goconfig) {
@@ -227,6 +228,9 @@ class GocodeProvider {
     if (!candidates) {
       return []
     }
+    if (candidates[0] && candidates[0].class === 'PANIC' && candidates[0].type === 'PANIC' && candidates[0].name === 'PANIC') {
+      this.bounceGocode()
+    }
     const prefix = editor.getTextInBufferRange([[position.row, position.column - numPrefix], position])
     let suffix = false
     try {
@@ -630,5 +634,31 @@ class GocodeProvider {
     }
     return result
   }
+
+  bounceGocode () {
+    if (this.panicked) {
+      return
+    }
+
+    this.panicked = true
+    const notification = atom.notifications.addError('gocode', {
+      dismissable: true,
+      icon: 'flame',
+      detail: 'gocode is panicking',
+      description: 'This often happens when you install a new go version, or when you are running an out of date version of `gocode`.' + os.EOL + os.EOL + 'See the <a href="https://github.com/joefitzgerald/go-plus/wiki/FAQ#help-the-only-autocomplete-suggestion-that-i-am-receiving-is-panic">FAQ</a> for more information.' + os.EOL + os.EOL + 'Often, running `gocode close && go get -u github.com/nsf/gocode` is able to fix the issue.' + os.EOL + os.EOL + 'If this does not work and you are definitely running the latest version of `gocode`, you might want to search for open issues at <a href="https://github.com/nsf/gocode/issues?utf8=%E2%9C%93&q=is%3Aissue%20is%3Aopen%20panic">https://github.com/nsf/gocode/issues</a>.' + os.EOL + os.EOL + 'Would you like to try running `gocode close && go get -u github.com/nsf/gocode` now?',
+      buttons: [{
+        text: 'Yes',
+        onDidClick: () => {
+          notification.dismiss()
+          atom.commands.dispatch(atom.views.getView(atom.workspace), 'golang:update-tools', ['github.com/nsf/gocode'])
+        }
+      }, {
+        text: 'Not Now',
+        onDidClick: () => {
+          notification.dismiss()
+        }
+      }]
+    })
+  }
 }
 export {GocodeProvider}