haskell vim pragmas

hsvim.vim

Plug 'junegunn/vim-easy-align'

function! AddHsPragma()
    " Add a new HS pragma, and sort the list so it's pretty
    let pragma = input("LANGUAGE ")
    normal! ms
    if match(getline(1), "module") == 0
      execute "normal! ggO\<ESC>"
    endif
    if pragma != ""
        execute "normal! ggO{-# LANGUAGE " . pragma . " #-}\<ESC>"
    endif
    execute "normal! ggvip:sort\<CR>gv:EasyAlign -#\<CR>"
    normal `s
endfunction

let g:easy_align_delimiters = {
\ '#': { 'pattern': '#', 'left_margin': 1, 'right_margin': 0, 'stick_to_left': 0 },
\ }

nnoremap <leader>l :call AddHsPragma()<CR>