ale/autoload/ale/handlers/sh.vim

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VimL

" Author: w0rp <devw0rp@gmail.com>
" Get the shell type for a buffer, based on the hashbang line.
function! ale#handlers#sh#GetShellType(buffer) abort
let l:bang_line = get(getbufline(a:buffer, 1), 0, '')
" Take the shell executable from the hashbang, if we can.
if l:bang_line[:1] is# '#!'
" Remove options like -e, etc.
let l:command = substitute(l:bang_line, ' --\?[a-zA-Z0-9]\+', '', 'g')
for l:possible_shell in ['bash', 'dash', 'ash', 'tcsh', 'csh', 'zsh', 'sh']
if l:command =~# l:possible_shell . '\s*$'
return l:possible_shell
endif
endfor
endif
return ''
endfunction