OAuth Providers disable from the ApplicationSettings page

app/helpers/application_settings_helper.rb

@@ -60,4 +60,19 @@ module ApplicationSettingsHelper
       end
     end
   end
+
+  def oauth_providers_checkboxes(help_block_id)
+    button_based_providers.map do |source|
+      checked = current_application_settings.disabled_oauth_sign_in_sources.include?(source.to_s)
+      css_class = 'btn'
+      css_class += ' active' if checked
+      checkbox_name = 'application_setting[disabled_oauth_sign_in_sources][]'
+
+      label_tag(checkbox_name, class: css_class) do
+        check_box_tag(checkbox_name, source, checked,
+                      autocomplete: 'off',
+                      'aria-describedby' => help_block_id) + Gitlab::OAuth::Provider.label_for(source)
+      end
+    end
+  end
 end

app/views/admin/application_settings/_form.html.haml

@@ -109,6 +109,16 @@
           = f.label :signin_enabled do
             = f.check_box :signin_enabled
             Sign-in enabled
+    .form-group
+      = f.label :disable_oauth_signin_sources, class: 'control-label col-sm-2'
+      .col-sm-10
+        - data_attrs = { toggle: 'buttons' }
+        .btn-group{ data: data_attrs }
+          - oauth_providers_checkboxes('oauth-providers-help').each do |source|
+            = source
+        %span.help-block#oauth-providers-help
+          Enabled OmniAuth must be configured for GitHub
+          = link_to "(?)", help_page_path("integration", "github")
     .form-group
       = f.label :two_factor_authentication, 'Two-factor authentication', class: 'control-label col-sm-2'
       .col-sm-10