async.vim

" expiremental async job running thing with status window for neovim. never quite finished it.
function! UnmapEscKey()
    unmap <Esc>
    echo ''
endfunction

" log job output to a scratch buffer
function! s:LogAsyncJob(job_id, data, event)
    let cur_buf_win = bufwinnr('%')
    let job_buf_win = bufwinnr('job_output')

    execute job_buf_win . 'wincmd w'

    if a:event != 'exit'
        let str = ''.join(a:data)
    else
        let str = 'Job finished. Press <Esc> to delete output.'
        execute "nnoremap <buffer> <Esc> :bw job_output<CR>:call UnmapEscKey()<CR>"
    endif

    call append(line('$'), str)

    execute 'normal! G'
    execute cur_buf_win . 'wincmd w'
endfunction

" run jobs asynchronously, sup neovim
function! s:RunAsyncJob(command)
    let callbacks = {
        \ 'on_stdout': function('s:LogAsyncJob'),
        \ 'on_stderr': function('s:LogAsyncJob'),
        \ 'on_exit': function('s:LogAsyncJob')
        \ }

    if !bufexists('job_output')
        let savedsplitbelow = &splitbelow
        execute '5 sp job_output'
        setlocal buftype=nofile bufhidden=hide noswapfile
        autocmd QuitPre <buffer> bd job_output
        let &splitbelow = savedsplitbelow
    endif

    let job = jobstart(a:command, callbacks)
endfunction