- if controller_name != 'sessions'
  = link_to "Sign in", new_session_path(resource_name)
  %br/
- if devise_mapping.registerable? && controller_name != 'registrations'
  = link_to "Sign up", new_registration_path(resource_name)
  %br/
- if devise_mapping.recoverable? && controller_name != 'passwords' && controller_name != 'registrations'
  = link_to "Forgot your password?", new_password_path(resource_name)
  %br/
- if devise_mapping.confirmable? && controller_name != 'confirmations'
  = link_to "Didn't receive confirmation instructions?", new_confirmation_path(resource_name)
  %br/
- if devise_mapping.lockable? && resource_class.unlock_strategy_enabled?(:email) && controller_name != 'unlocks'
  = link_to "Didn't receive unlock instructions?", new_unlock_path(resource_name)
  %br/
- if devise_mapping.omniauthable?
  - resource_class.omniauth_providers.each do |provider|
    = link_to "Sign in with #{provider.to_s.titleize}", omniauth_authorize_path(resource_name, provider)
    %br/

- if controller_name != 'sessions'
  = link_to "Sign in", new_session_path(resource_name)
  %br/
- if devise_mapping.registerable? && controller_name != 'registrations'
  = link_to "Sign up", new_registration_path(resource_name)
  %br/
- if devise_mapping.recoverable? && controller_name != 'passwords' && controller_name != 'registrations'
  = link_to "Forgot your password?", new_password_path(resource_name)
  %br/
- if devise_mapping.confirmable? && controller_name != 'confirmations'
  = link_to "Didn't receive confirmation instructions?", new_confirmation_path(resource_name)
  %br/
- if devise_mapping.lockable? && resource_class.unlock_strategy_enabled?(:email) && controller_name != 'unlocks'
  = link_to "Didn't receive unlock instructions?", new_unlock_path(resource_name)
  %br/
- if devise_mapping.omniauthable?
  - resource_class.omniauth_providers.each do |provider|
    - if eval("#{provider.upcase}_ENABLED")
      = link_to "Sign in with #{provider.to_s.titleize}", omniauth_authorize_path(resource_name, provider)
    %br/

Check if provider is enabled before adding link
Check if provider is enabled before adding link

Determine if each provider is enabled in 'config/environment_custom.rb'
before attempting to add a link in the shared links view. Without the
check, the links would always be available but would be dead ends on
the provider side if the admin hadn't provided a key and secret in the
omniauth provider config.
