Update UI text for external wiki

- Fix outdated info
- Add help text
- Replace placeholder text
- Add missing docs
- Link to docs
- Update translation

app/models/project_services/external_wiki_service.rb

 # frozen_string_literal: true
 
 class ExternalWikiService < Service
+  include ActionView::Helpers::UrlHelper
   prop_accessor :external_wiki_url
-
   validates :external_wiki_url, presence: true, public_url: true, if: :activated?
 
   def title
@@ -10,7 +10,7 @@ class ExternalWikiService < Service
   end
 
   def description
-    s_('ExternalWikiService|Replaces the link to the internal wiki with a link to an external wiki.')
+    s_('ExternalWikiService|Link to an external wiki from the sidebar.')
   end
 
   def self.to_param
@@ -23,12 +23,19 @@ class ExternalWikiService < Service
         type: 'text',
         name: 'external_wiki_url',
         title: s_('ExternalWikiService|External wiki URL'),
-        placeholder: s_('ExternalWikiService|The URL of the external wiki'),
+        placeholder: s_('ExternalWikiService|https://example.com/xxx/wiki/...'),
+        help: 'Enter the URL to the external wiki.',
         required: true
       }
     ]
   end
 
+  def help
+    docs_link = link_to _('Learn more.'), Rails.application.routes.url_helpers.help_page_url('user/project/wiki/index', anchor: 'link-an-external-wiki'), target: '_blank', rel: 'noopener noreferrer'
+
+    s_('Link an external wiki from the project\'s sidebar. %{docs_link}').html_safe % { docs_link: docs_link.html_safe }
+  end
+
   def execute(_data)
     response = Gitlab::HTTP.get(properties['external_wiki_url'], verify: true)
     response.body if response.code == 200

changelogs/unreleased/ui-settings-okr-external-wiki.yml

+---
+title: Updated outdated UI text and docs
+merge_request: 58600
+author:
+type: other

doc/user/project/integrations/overview.md

@@ -38,7 +38,7 @@ Click on the service links to see further configuration instructions and details
 | Drone CI                                                  | Run CI/CD pipelines with Drone.                                                              | **{check-circle}** Yes |
 | [Emails on push](emails_on_push.md)                       | Send commits and diff of each push by email.                                                 | **{dotted-circle}** No |
 | [EWM](ewm.md)                                             | Use IBM Engineering Workflow Management as the issue tracker.                                | **{dotted-circle}** No |
-| External wiki                                             | Replace internal wiki link with external wiki link.                                          | **{dotted-circle}** No |
+| [External wiki](../wiki/index.md#link-an-external-wiki)   | Link an external wiki.                                          | **{dotted-circle}** No |
 | Flowdock                                                  | Use Flowdock with GitLab.                                                                    | **{dotted-circle}** No |
 | [GitHub](github.md)                                       | Obtain statuses for commits and pull requests.                                               | **{dotted-circle}** No |
 | [Hangouts Chat](hangouts_chat.md)                         | Receive events notifications.                                                                | **{dotted-circle}** No |

doc/user/project/wiki/index.md

@@ -237,6 +237,49 @@ Group wikis can be edited by members with [Developer permissions](../../permissi
 and above. Group wiki repositories can be moved using the
 [Group repository storage moves API](../../../api/group_repository_storage_moves.md).
 
+## Link an external wiki
+
+To add a link to an external wiki from a project's left sidebar:
+
+1. In your project, go to **Settings > Integrations**.
+1. Select **External wiki**.
+1. Add the URL to your external wiki.
+1. (Optional) Select **Test settings** to verify the connection.
+1. Select **Save changes**.
+
+You can now see the **External wiki** option from your project's
+left sidebar.
+
+When you enable this integration, the link to the external
+wiki won't replace the link to the internal wiki.
+To hide the internal wiki from the sidebar, [disable the project's wiki](#disable-the-projects-wiki).
+
+To hide the link to an external wiki:
+
+1. In your project, go to **Settings > Integrations**.
+1. Select **External wiki**.
+1. Unselect **Enable integration**.
+1. Select **Save changes**.
+
+## Disable the project's wiki
+
+To disable a project's internal wiki:
+
+1. In your project, go to **Settings > General**.
+1. Expand **Visibility, project features, permissions**.
+1. Scroll down to find **Wiki** and toggle it off (in gray).
+1. Select **Save changes**.
+
+The internal wiki is now disabled, and users and project members:
+
+- Cannot find the link to the wiki from the project's sidebar.
+- Cannot add, delete, or edit wiki pages.
+- Cannot view any wiki page.
+
+Previously added wiki pages are preserved in case you
+want to re-enable the wiki. To re-enable it, repeat the process
+to disable the wiki but toggle it on (in blue).
+
 ## Resources
 
 - [Wiki settings for administrators](../../../administration/wikis/index.md)

locale/gitlab.pot

@@ -13085,10 +13085,10 @@ msgstr ""
 msgid "ExternalWikiService|External wiki URL"
 msgstr ""
 
-msgid "ExternalWikiService|Replaces the link to the internal wiki with a link to an external wiki."
+msgid "ExternalWikiService|Link to an external wiki from the sidebar."
 msgstr ""
 
-msgid "ExternalWikiService|The URL of the external wiki"
+msgid "ExternalWikiService|https://example.com/xxx/wiki/..."
 msgstr ""
 
 msgid "Externally installed"
@@ -19022,6 +19022,9 @@ msgstr ""
 msgid "Link Prometheus monitoring to GitLab."
 msgstr ""
 
+msgid "Link an external wiki from the project's sidebar. %{docs_link}"
+msgstr ""
+
 msgid "Link copied"
 msgstr ""