Move project default branch settings under 'Repository'

- Updates specs accordingly
- Updates docs accordingly
- Brews a fresh pot

app/views/projects/default_branch/_show.html.haml

+- expanded = Rails.env.test?
+
+%section.settings.no-animate#default-branch-settings{ class: ('expanded' if expanded) }
+  .settings-header
+    %h4= _('Default Branch')
+    %button.btn.js-settings-toggle
+      = expanded ? _('Collapse') : _('Expand')
+    %p
+      = _('Select the branch you want to set as the default for this project. All merge requests and commits will automatically be made against this branch unless you specify a different one.')
+
+  .settings-content
+    - if @project.empty_repo?
+      .text-secondary
+        = _('A default branch cannot be chosen for an empty project.')
+    - else
+      = form_for [@project.namespace.becomes(Namespace), @project], remote: true, html: { multipart: true, anchor: 'default-branch-settings' }, authenticity_token: true do |f|
+        %fieldset
+          .form-group
+            = f.label :default_branch, "Default Branch", class: 'label-bold'
+            = f.select(:default_branch, @project.repository.branch_names, {}, {class: 'select2 select-wide'})
+        = f.submit 'Save changes', class: "btn btn-success"

app/views/projects/edit.html.haml

@@ -36,11 +36,6 @@
 
           = render_if_exists 'projects/classification_policy_settings', f: f
 
-          - unless @project.empty_repo?
-            .form-group
-              = f.label :default_branch, "Default Branch", class: 'label-bold'
-              = f.select(:default_branch, @project.repository.branch_names, {}, {class: 'select2 select-wide'})
-
         = render_if_exists 'shared/repository_size_limit_setting', form: f, type: :project
 
         .form-group

app/views/projects/settings/repository/show.html.haml

@@ -2,6 +2,7 @@
 - page_title _("Repository")
 - @content_class = "limit-container-width" unless fluid_layout
 
+= render "projects/default_branch/show"
 = render "projects/mirrors/show"
 
 -# Protected branches & tags use a lot of nested partials.

changelogs/unreleased/36048-move-default-branch-settings-under-repository.yml

+---
+title: Move project settings for default branch under "Repository"
+merge_request: 21380
+author:
+type: changed

doc/user/project/repository/branches/index.md

@@ -16,7 +16,7 @@ See also:
 
 When you create a new [project](../../index.md), GitLab sets `master` as the default
 branch for your project. You can choose another branch to be your project's
-default under your project's **Settings > General**.
+default under your project's **Settings > Repository**.
 
 The default branch is the branch affected by the
 [issue closing pattern](../../issues/automatic_issue_closing.md),

locale/gitlab.pot

@@ -250,6 +250,9 @@ msgstr ""
 msgid "A collection of graphs regarding Continuous Integration"
 msgstr ""
 
+msgid "A default branch cannot be chosen for an empty project."
+msgstr ""
+
 msgid "A new branch will be created in your fork and a new merge request will be started."
 msgstr ""
 
@@ -2086,6 +2089,9 @@ msgstr ""
 msgid "Decline and sign out"
 msgstr ""
 
+msgid "Default Branch"
+msgstr ""
+
 msgid "Default: Directly import the Google Code email address or username"
 msgstr ""
 
@@ -5062,6 +5068,9 @@ msgstr ""
 msgid "Select target branch"
 msgstr ""
 
+msgid "Select the branch you want to set as the default for this project. All merge requests and commits will automatically be made against this branch unless you specify a different one."
+msgstr ""
+
 msgid "Selecting a GitLab user will add a link to the GitLab user in the descriptions of issues and comments (e.g. \"By <a href=\"#\">@johnsmith</a>\"). It will also associate and/or assign these issues and comments with the selected user."
 msgstr ""
 

spec/features/projects/settings/user_changes_default_branch_spec.rb

 require 'spec_helper'
 
 describe 'Projects > Settings > User changes default branch' do
+  include Select2Helper
+
   let(:user) { create(:user) }
-  let(:project) { create(:project, :repository, namespace: user.namespace) }
 
   before do
     sign_in(user)
-    visit edit_project_path(project)
+
+    visit project_settings_repository_path(project)
   end
 
-  it 'allows to change the default branch' do
-    select 'fix', from: 'project_default_branch'
-    page.within '.general-settings' do
-      click_button 'Save changes'
+  context 'with normal project' do
+    let(:project) { create(:project, :repository, namespace: user.namespace) }
+
+    it 'allows to change the default branch', :js do
+      select2('fix', from: '#project_default_branch')
+
+      page.within '#default-branch-settings' do
+        click_button 'Save changes'
+      end
+
+      expect(find('#project_default_branch', visible: false).value).to eq 'fix'
     end
+  end
 
-    expect(find(:css, 'select#project_default_branch').value).to eq 'fix'
+  context 'with empty project' do
+    let(:project) { create(:project_empty_repo, namespace: user.namespace) }
+
+    it 'does not show default branch selector' do
+      expect(page).not_to have_selector('#project_default_branch')
+    end
   end
 end