wrapper function

rails.fish

function rails
  docker-compose config --services >/dev/null ^/dev/null
  switch $status
    case 0
      docker-compose exec app rails $argv
    case '*'
      if test -d bin
        bin/rails $argv
      else
        set -l rails_cmd (which rails)
        eval "$rails_cmd $argv"
      end
  end
end