Capistrano 3 rails console tasks and log tailing tasks

rails.cap

# Place in lib/capistrano/tasks/rails.cap and require it in your Capfile
# See: https://gist.github.com/existentialmutt/c904d6e55cd09dda81ea9751d2e66e6d
# Adapted to work with RVM installed to /usr/local
namespace :rails do
  desc "tail rails logs" 
  task :tail_logs do
    on roles(:app) do
      execute "tail -f #{shared_path}/log/#{fetch(:rails_env)}.log"
    end
  end

  desc "Open the rails console on primary app server"
  task :console do
    on roles(:app), primary: true do
      rails_env = fetch(:stage)
      execute_interactively "bin/rails console #{rails_env}"
    end

  end

  desc "Open the rails dbconsole on primary db server"
  task :dbconsole do
    on roles(:db), primary: true do
      rails_env = fetch(:stage)
      execute_interactively "#{current_path}/bin/rails dbconsole #{rails_env}"
    end
  end

  def execute_interactively(command)
    user = fetch(:user)
    port = fetch(:port) || 22
    cmd = "ssh"
    if user
      cmd << " -l #{user}"
    end
    cmd << " #{host} -p #{port} -t 'cd #{fetch(:deploy_to)}/current && /usr/local/rvm/bin/rvm `cat .ruby-version` do #{bundle_cmd} #{command}'"
    info "Connecting to #{host} with command"
    info cmd
    exec cmd
  end

  def bundle_cmd
    "bundle exec"
  end
end