Add setting that allows admins to choose which Git access protocols are enabled

CHANGELOG

@@ -176,6 +176,7 @@ v 8.9.0
   - Fix horizontal scrollbar for long commit message.
   - GitLab Performance Monitoring now tracks the total method execution time and call count per method
   - Add Environments and Deployments
+  - Add "Enabled Git access protocols" to Application Settings
   - Redesign account and email confirmation emails
   - Don't fail builds for projects that are deleted
   - Support Docker Registry manifest v1

app/assets/stylesheets/framework/buttons.scss

@@ -281,3 +281,10 @@
     color: $gl-icon-color;
   }
 }
+
+.clone-dropdown-btn a {
+  color: #555;
+  &:hover {
+    text-decoration: none;
+  }
+}

app/controllers/admin/application_settings_controller.rb

@@ -110,6 +110,7 @@ class Admin::ApplicationSettingsController < Admin::ApplicationController
       :send_user_confirmation_email,
       :container_registry_token_expire_delay,
       :repository_storage,
+      :enabled_git_access_protocols,
       restricted_visibility_levels: [],
       import_sources: [],
       disabled_oauth_sign_in_sources: []

app/helpers/application_settings_helper.rb

@@ -31,6 +31,28 @@ module ApplicationSettingsHelper
     current_application_settings.akismet_enabled?
   end
+  def allowed_protocols_present?
+    current_application_settings.enabled_git_access_protocols.present?
+  end
+
+  def enabled_protocol
+    case current_application_settings.enabled_git_access_protocols
+    when 'http'
+      gitlab_config.protocol
+    when 'ssh'
+      'ssh'
+    end
+  end
+
+  def enabled_project_tooltip(project, protocol)
+    case protocol
+    when 'ssh'
+      sanitize(ssh_clone_button(project), tags: %w(a), attributes: %w(id class title data-html data-container data-placement data-title data-original-title aria-describedby))
+    else
+      sanitize(http_clone_button(project), tags: %w(a), attributes: %w(id class title data-html data-container data-placement data-title data-original-title aria-describedby))
+    end
+  end
+
   # Return a group of checkboxes that use Bootstrap's button plugin for a
   # toggle button effect.
   def restricted_level_checkboxes(help_block_id)

app/helpers/projects_helper.rb

@@ -206,10 +206,14 @@ module ProjectsHelper
   end
   def default_clone_protocol
-    if !current_user || current_user.require_ssh_key?
-      gitlab_config.protocol
+    if allowed_protocols_present?
+      enabled_protocol
     else
-      "ssh"
+      if !current_user || current_user.require_ssh_key?
+        gitlab_config.protocol
+      else
+        'ssh'
+      end
     end
   end

app/models/application_setting.rb

@@ -59,6 +59,8 @@ class ApplicationSetting < ActiveRecord::Base
     presence: true,
     inclusion: { in: ->(_object) { Gitlab.config.repositories.storages.keys } }
+  validates_inclusion_of :enabled_git_access_protocols, in: %w(ssh http), allow_blank: true, allow_nil: true
+
   validates_each :restricted_visibility_levels do |record, attr, value|
     unless value.nil?
       value.each do |level|

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

@@ -43,6 +43,12 @@
           = link_to "(?)", help_page_path("integration", "bitbucket")
           and GitLab.com
           = link_to "(?)", help_page_path("integration", "gitlab")
+    .form-group
+      %label.control-label.col-sm-2 Enabled Git access protocols
+      .col-sm-10
+        = select(:application_setting, :enabled_git_access_protocols, [['Both SSH and HTTP', nil], ['Only SSH', 'ssh'], ['Only HTTP(S)', 'http']], {}, class: 'form-control')
+        %span.help-block#clone-protocol-help
+          Allow only the selected protocols to be used for Git access.
     .form-group
       .col-sm-offset-2.col-sm-10
         .checkbox

app/views/shared/_clone_panel.html.haml

@@ -2,15 +2,20 @@
 .git-clone-holder.input-group
   .input-group-btn
-    %a#clone-dropdown.clone-dropdown-btn.btn{href: '#', 'data-toggle' => 'dropdown'}
-      %span
-        = default_clone_protocol.upcase
-      = icon('caret-down')
-    %ul.dropdown-menu.dropdown-menu-right.clone-options-dropdown
-      %li
-        = ssh_clone_button(project)
-      %li
-        = http_clone_button(project)
+    -if allowed_protocols_present?
+      .clone-dropdown-btn.btn
+        %span
+          = enabled_project_tooltip(project, enabled_protocol)
+    - else
+      %a#clone-dropdown.clone-dropdown-btn.btn{href: '#', data: { toggle: 'dropdown' }}
+        %span
+          = default_clone_protocol.upcase
+        = icon('caret-down')
+      %ul.dropdown-menu.dropdown-menu-right.clone-options-dropdown
+        %li
+          = ssh_clone_button(project)
+        %li
+          = http_clone_button(project)
   = text_field_tag :project_clone, default_url_to_repo(project), class: "js-select-on-focus form-control", readonly: true
   .input-group-btn

db/migrate/20160615173316_add_enabled_git_access_protocols_to_application_settings.rb

+# See http://doc.gitlab.com/ce/development/migration_style_guide.html
+# for more information on how to write migrations for GitLab.
+# rubocop:disable all
+
+class AddEnabledGitAccessProtocolsToApplicationSettings < ActiveRecord::Migration
+  include Gitlab::Database::MigrationHelpers
+
+  def change
+    add_column :application_settings, :enabled_git_access_protocols, :string
+  end
+end

db/schema.rb

@@ -86,6 +86,7 @@ ActiveRecord::Schema.define(version: 20160705163108) do
     t.integer  "container_registry_token_expire_delay", default: 5
     t.text     "after_sign_up_text"
     t.string   "repository_storage",                    default: "default"
+    t.string   "enabled_git_access_protocols"
   end
   create_table "audit_events", force: :cascade do |t|

doc/api/settings.md

@@ -68,6 +68,7 @@ PUT /application/settings
 | `after_sign_out_path` | string | no | Where to redirect users after logout |
 | `container_registry_token_expire_delay` | integer | no | Container Registry token duration in minutes |
 | `repository_storage` | string | no | Storage path for new projects. The value should be the name of one of the repository storage paths defined in your gitlab.yml |
+| `enabled_git_access_protocols` | string | no | Enabled protocols for Git access. Allowed values are: `ssh`, `http`, and `nil` to allow both protocols.
 ```bash
 curl -X PUT -H "PRIVATE-TOKEN: 9koXpg98eAheJpvBs5tK" https://gitlab.example.com/api/v3/application/settings?signup_enabled=false&default_project_visibility=1

spec/features/admin/admin_disables_git_access_protocol_spec.rb

+require 'rails_helper'
+
+feature 'Admin disables Git access protocol', feature: true do
+  let(:project) { create(:empty_project, :empty_repo) }
+  let(:admin) { create(:admin) }
+
+  background do
+    login_as(admin)
+  end
+
+  context 'with HTTP disabled' do
+    background do
+      disable_http_protocol
+    end
+
+    scenario 'shows only SSH url' do
+      visit_project
+
+      expect(page).to have_content("git clone #{project.ssh_url_to_repo}")
+      expect(page).not_to have_selector('#clone-dropdown')
+    end
+  end
+
+  context 'with SSH disabled' do
+    background do
+      disable_ssh_protocol
+    end
+
+    scenario 'shows only HTTP url' do
+      visit_project
+
+      expect(page).to have_content("git clone #{project.http_url_to_repo}")
+      expect(page).not_to have_selector('#clone-dropdown')
+    end
+  end
+
+  context 'with nothing disabled' do
+    background do
+      create(:personal_key, user: admin)
+    end
+
+    scenario 'shows default SSH url and protocol selection dropdown' do
+      visit_project
+
+      expect(page).to have_content("git clone #{project.ssh_url_to_repo}")
+      expect(page).to have_selector('#clone-dropdown')
+    end
+
+  end
+
+  def visit_project
+    visit namespace_project_path(project.namespace, project)
+  end
+
+  def disable_http_protocol
+    visit admin_application_settings_path
+    find('#application_setting_enabled_git_access_protocols').find(:xpath, 'option[2]').select_option
+    click_on 'Save'
+  end
+
+  def disable_ssh_protocol
+    visit admin_application_settings_path
+    find('#application_setting_enabled_git_access_protocols').find(:xpath, 'option[3]').select_option
+    click_on 'Save'
+  end
+end