Vim - map last shell command to the key

Question

Is there any way to map leader-r to repeat last command sent to bash?

For example, when working with C files I would like to compile and run program from vim without typing :!make or gcc.

I know I can bind specific command to the key but it won't work for other types of files.

Answer 1

The :!! command repeats the last :!{cmd}. It's even available in venerable ol' vi.

Answer 2

Edit: Ingo Karkat's answer is much better. ... I would delete this post if it wasn't accepted (which means I can't).

Here's one solution. It only searches the last 100 commands, obviously, you could change this number (History indexing starts at -1, which is the last command you typed, so the lower the number, the further is searched).

fun! LastCommand()
        let l:i = -1
        while l:i > -100
                let l:cmd = histget("cmd", l:i)
                if strpart(l:cmd, 0, 1) == "!"
                        let l:i = 1
                        execute l:cmd
                        break
                endif
                let l:i -= 1
        endwhile

        if l:i < 1 | echoerr "No command found" | endif
endfun
nnoremap <Leader>r :call LastCommand()<CR>