openproject/app/views/account/_auth_providers.html.erb

<%#-- copyright
OpenProject is a project management system.
Copyright (C) 2012-2018 the OpenProject Foundation (OPF)

This program is free software; you can redistribute it and/or
modify it under the terms of the GNU General Public License version 3.

OpenProject is a fork of ChiliProject, which is a fork of Redmine. The copyright follows:
Copyright (C) 2006-2017 Jean-Philippe Lang
Copyright (C) 2010-2013 the ChiliProject Team

This program is free software; you can redistribute it and/or
modify it under the terms of the GNU General Public License
as published by the Free Software Foundation; either version 2
of the License, or (at your option) any later version.

This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
GNU General Public License for more details.

You should have received a copy of the GNU General Public License
along with this program; if not, write to the Free Software
Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301, USA.

See docs/COPYRIGHT.rdoc for more details.

++#%>

<%
# Remove this ugly hack when creating an authentication plugin.
#
# This hack is required as we don't have a way to list all active
# Omniauth Providers without a patch.
#
# See
# * https://community.openproject.org/work_packages/7192
# * http://stackoverflow.com/questions/13112430/find-loaded-providers-for-omniauth
auth_provider_html = call_hook :view_account_login_auth_provider
no_pwd = OpenProject::Configuration.disable_password_login?
pclass = no_pwd ? 'no-pwd' : ''
wclass = local_assigns[:wide] ? 'wide' : ''
%>
<% if auth_provider_html.strip != '' %>
  <div class="login-auth-providers <%= pclass %> <%= wclass %>">
    <% unless no_pwd %>
      <h3 class="login-auth-providers-title"><span>
          <%= local_assigns[:omniauth_title] || I18n.t('account.login_with_auth_provider')%>
        </span></h3>
    <% end %>
    <div class="login-auth-provider-list">
      <%= auth_provider_html %>
    </div>
  </div>
<% end %>