Allow admins to override restricted visibility

Allow admins to use restricted visibility levels when creating or
updating projects.

CHANGELOG

@@ -11,6 +11,7 @@ v 7.9.0 (unreleased)
   - Improve error messages for file edit failures
   - Improve UI for commits, issues and merge request lists
   - Fix commit comments on first line of diff not rendering in Merge Request Discussion view.
+  - Allow admins to override restricted project visibility settings.
   - Move restricted visibility settings from gitlab.yml into the web UI.
   - Improve trigger merge request hook when source project branch has been updated (Kirill Zaitsev)
   - Save web edit in new branch

app/models/project.rb

@@ -34,8 +34,6 @@ require 'file_size_validator'
 
 class Project < ActiveRecord::Base
   include Sortable
-  include Gitlab::CurrentSettings
-  extend Gitlab::CurrentSettings
   include Gitlab::ShellAdapter
   include Gitlab::VisibilityLevel
   include Gitlab::ConfigHelper
@@ -133,9 +131,6 @@ class Project < ActiveRecord::Base
               message: Gitlab::Regex.path_regex_message }
   validates :issues_enabled, :merge_requests_enabled,
             :wiki_enabled, inclusion: { in: [true, false] }
-  validates :visibility_level,
-    exclusion: { in: current_application_settings.restricted_visibility_levels },
-    if: -> { current_application_settings.restricted_visibility_levels.any? }
   validates :issues_tracker_id, length: { maximum: 255 }, allow_blank: true
   validates :namespace, presence: true
   validates_uniqueness_of :name, scope: :namespace_id

app/services/projects/base_service.rb

@@ -0,0 +1,18 @@
+module Projects
+  class BaseService < ::BaseService
+    # Add an error to the project for restricted visibility levels
+    def deny_visibility_level(project, denied_visibility_level = nil)
+      denied_visibility_level ||= project.visibility_level
+
+      level_name = 'Unknown'
+      Gitlab::VisibilityLevel.options.each do |name, level|
+        level_name = name if level == denied_visibility_level
+      end
+
+      project.errors.add(
+        :visibility_level,
+        "#{level_name} visibility has been restricted by your GitLab administrator"
+      )
+    end
+  end
+end

app/services/projects/create_service.rb

@@ -1,5 +1,5 @@
 module Projects
-  class CreateService < BaseService
+  class CreateService < Projects::BaseService
     def initialize(user, params)
       @current_user, @params = user, params.dup
     end
@@ -7,9 +7,12 @@ module Projects
     def execute
       @project = Project.new(params)
 
-      # Reset visibility level if is not allowed to set it
-      unless Gitlab::VisibilityLevel.allowed_for?(current_user, params[:visibility_level])
-        @project.visibility_level = default_features.visibility_level
+      # Make sure that the user is allowed to use the specified visibility
+      # level
+      unless Gitlab::VisibilityLevel.allowed_for?(current_user,
+                                                  params[:visibility_level])
+        deny_visibility_level(@project)
+        return @project
       end
 
       # Set project name from path

app/services/projects/update_service.rb

@@ -1,9 +1,14 @@
 module Projects
-  class UpdateService < BaseService
+  class UpdateService < Projects::BaseService
     def execute
       # check that user is allowed to set specified visibility_level
-      unless can?(current_user, :change_visibility_level, project) && Gitlab::VisibilityLevel.allowed_for?(current_user, params[:visibility_level])
-        params[:visibility_level] = project.visibility_level
+      new_visibility = params[:visibility_level]
+      if new_visibility && new_visibility.to_i != project.visibility_level
+        unless can?(current_user, :change_visibility_level, project) &&
+          Gitlab::VisibilityLevel.allowed_for?(current_user, new_visibility)
+          deny_visibility_level(project, new_visibility)
+          return project
+        end
       end
 
       new_branch = params[:default_branch]

doc/public_access/public_access.md

@@ -41,4 +41,4 @@ When visiting the public page of an user, you will only see listed projects whic
 
 ## Restricting the use of public or internal projects
 
-In [gitlab.yml](https://gitlab.com/gitlab-org/gitlab-ce/blob/dbd88d453b8e6c78a423fa7e692004b1db6ea069/config/gitlab.yml.example#L64) you can disable public projects or public and internal projects for the entire GitLab installation to prevent people making code public by accident.
+In [gitlab.yml](https://gitlab.com/gitlab-org/gitlab-ce/blob/dbd88d453b8e6c78a423fa7e692004b1db6ea069/config/gitlab.yml.example#L64) you can disable public projects or public and internal projects for the entire GitLab installation to prevent people making code public by accident.  The restricted visibility settings do not apply to admin users.

lib/api/helpers.rb

@@ -204,7 +204,7 @@ module API
     end
 
     def render_validation_error!(model)
-      unless model.valid?
+      if model.errors.any?
         render_api_error!(model.errors.messages || '400 Bad Request', 400)
       end
     end

lib/api/projects.rb

@@ -233,10 +233,10 @@ module API
         ::Projects::UpdateService.new(user_project,
                                       current_user, attrs).execute
 
-        if user_project.valid?
-          present user_project, with: Entities::Project
-        else
+        if user_project.errors.any?
           render_validation_error!(user_project)
+        else
+          present user_project, with: Entities::Project
         end
       end
 

spec/requests/api/projects_spec.rb

@@ -3,6 +3,7 @@ require 'spec_helper'
 
 describe API::API, api: true  do
   include ApiHelpers
+  include Gitlab::CurrentSettings
   let(:user) { create(:user) }
   let(:user2) { create(:user) }
   let(:user3) { create(:user) }
@@ -202,6 +203,31 @@ describe API::API, api: true  do
       expect(json_response['public']).to be_falsey
       expect(json_response['visibility_level']).to eq(Gitlab::VisibilityLevel::PRIVATE)
     end
+
+    context 'when a visibility level is restricted' do
+      before do
+        @project = attributes_for(:project, { public: true })
+        allow_any_instance_of(ApplicationSetting).to(
+          receive(:restricted_visibility_levels).and_return([20])
+        )
+      end
+
+      it 'should not allow a non-admin to use a restricted visibility level' do
+        post api('/projects', user), @project
+        expect(response.status).to eq(400)
+        expect(json_response['message']['visibility_level'].first).to(
+          match('restricted by your GitLab administrator')
+        )
+      end
+
+      it 'should allow an admin to override restricted visibility settings' do
+        post api('/projects', admin), @project
+        expect(json_response['public']).to be_truthy
+        expect(json_response['visibility_level']).to(
+          eq(Gitlab::VisibilityLevel::PUBLIC)
+        )
+      end
+    end
   end
 
   describe 'POST /projects/user/:id' do

spec/services/projects/create_service_spec.rb

@@ -55,6 +55,33 @@ describe Projects::CreateService do
         it { expect(File.exists?(@path)).to be_falsey }
       end
     end
+
+    context 'restricted visibility level' do
+      before do
+        allow_any_instance_of(ApplicationSetting).to(
+          receive(:restricted_visibility_levels).and_return([20])
+        )
+
+        @opts.merge!(
+          visibility_level: Gitlab::VisibilityLevel.options['Public']
+        )
+      end
+
+      it 'should not allow a restricted visibility level for non-admins' do
+        project = create_project(@user, @opts)
+        expect(project).to respond_to(:errors)
+        expect(project.errors.messages).to have_key(:visibility_level)
+        expect(project.errors.messages[:visibility_level].first).to(
+          match('restricted by your GitLab administrator')
+        )
+      end
+
+      it 'should allow a restricted visibility level for admins' do
+        project = create_project(@admin, @opts)
+        expect(project.errors.any?).to be(false)
+        expect(project.saved?).to be(true)
+      end
+    end
   end
 
   def create_project(user, opts)

spec/services/projects/update_service_spec.rb

@@ -47,9 +47,9 @@ describe Projects::UpdateService do
 
     context 'respect configured visibility restrictions setting' do
       before(:each) do
-        @restrictions = double("restrictions")
-        allow(@restrictions).to receive(:restricted_visibility_levels) { [ "public" ] }
-        Settings.stub_chain(:gitlab).and_return(@restrictions)
+        allow_any_instance_of(ApplicationSetting).to(
+          receive(:restricted_visibility_levels).and_return([20])
+        )
       end
 
       context 'should be private when updated to private' do