select one raketask with fzf in the fish shell

rt.fish

function rt -d "select one rake task"
  if rake -T | fzf > $TMPDIR/fzf.result
    set fzf_result (cat $TMPDIR/fzf.result | cut -d ' ' -f 2)
    set h "rake $fzf_result"
    commandline $h
  end
end

sans temp file & supports multiple tasks:

function rt -d "Fuzzy-find & execute rake tasks"
  set -l tasks (rake -T | fzf -m | cut -d ' ' -f 2 | perl -pe 'if(!eof){s/\n/ /}')
  commandline "rake $tasks"
end