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" Author: w0rp <devw0rp@gmail.com>
" Description: This file adds support for using the shellcheck linter with
"   shell scripts.

" This global variable can be set with a string of comma-seperated error
" codes to exclude from shellcheck. For example:
"
" let g:ale_linters_sh_shellcheck_exclusions = 'SC2002,SC2004'
if !exists('g:ale_linters_sh_shellcheck_exclusions')
    let g:ale_linters_sh_shellcheck_exclusions = ''
endif

if g:ale_linters_sh_shellcheck_exclusions !=# ''
    let s:exclude_option = '-e ' .  g:ale_linters_sh_shellcheck_exclusions
else
    let s:exclude_option = ''
endif

function! s:GetDialectArgument() abort
    if exists('b:is_bash') && b:is_bash
        return '-s bash'
    elseif exists('b:is_sh') && b:is_sh
        return '-s sh'
    elseif exists('b:is_kornshell') && b:is_kornshell
        return '-s ksh'
    endif

    return ''
endfunction

function! ale_linters#sh#shellcheck#GetCommand(buffer) abort
  return 'shellcheck ' . s:exclude_option . ' ' . s:GetDialectArgument() . ' -f gcc -'
endfunction

call ale#linter#Define('sh', {
\   'name': 'shellcheck',
\   'executable': 'shellcheck',
\   'command_callback': 'ale_linters#sh#shellcheck#GetCommand',
\   'callback': 'ale#handlers#HandleGCCFormat',
\})