gitlab-org--gitlab-foss/config/routes/wiki.rb

WIKI_SLUG_ID = { id: /\S+/ } unless defined? WIKI_SLUG_ID

scope(controller: :wikis) do
  scope(path: 'wikis', as: :wikis) do
    get :git_access
    get :pages
    get '/', to: redirect('/%{namespace_id}/%{project_id}/wikis/home')
    post '/', to: 'wikis#create'
  end

  scope(path: 'wikis/*id', as: :wiki, constraints: WIKI_SLUG_ID, format: false) do
    get :edit
    get :history
    post :preview_markdown
    get '/', action: :show
    put '/', action: :update
    delete '/', action: :destroy
  end
end