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" Author: w0rp <devw0rp@gmail.com>
" Description: Lints sh files using bash -n
" This option can be changed to change the default shell when the shell
" cannot be taken from the hashbang line.
if !exists('g:ale_linters_sh_shell_default_shell')
let g:ale_linters_sh_shell_default_shell = fnamemodify($SHELL, ':t')
if g:ale_linters_sh_shell_default_shell ==# ''
let g:ale_linters_sh_shell_default_shell = 'bash'
endif
endif
function! ale_linters#sh#shell#GetExecutable(buffer) abort
let l:banglines = getbufline(a:buffer, 1)
" Take the shell executable from the hashbang, if we can.
if len(l:banglines) == 1 && l:banglines[0] =~# '^#!'
" Remove options like -e, etc.
let l:line = substitute(l:banglines[0], '--\?[a-zA-Z0-9]\+', '', 'g')
for l:possible_shell in ['bash', 'tcsh', 'csh', 'zsh', 'sh']
if l:line =~# l:possible_shell . '\s*$'
return l:possible_shell
endif
endfor
endif
return g:ale_linters_sh_shell_default_shell
endfunction
function! ale_linters#sh#shell#GetCommand(buffer) abort
return ale_linters#sh#shell#GetExecutable(a:buffer) . ' -n'
endfunction
function! ale_linters#sh#shell#Handle(buffer, lines) abort
" Matches patterns line the following:
"
" bash: line 13: syntax error near unexpected token `d'
" sh: 11: Syntax error: "(" unexpected
let l:pattern = '^[^:]\+: \%(\w\+ \|\)\(\d\+\): \(.\+\)'
let l:output = []
for l:line in a:lines
let l:match = matchlist(l:line, l:pattern)
if len(l:match) == 0
continue
endif
let l:line = l:match[1] + 0
let l:column = 1
let l:text = l:match[2]
let l:type = 'E'
" vcol is Needed to indicate that the column is a character.
call add(l:output, {
\ 'bufnr': a:buffer,
\ 'lnum': l:line,
\ 'vcol': 0,
\ 'col': l:column,
\ 'text': l:text,
\ 'type': l:type,
\ 'nr': -1,
\})
endfor
return l:output
endfunction
call ale#linter#Define('sh', {
\ 'name': 'shell',
\ 'output_stream': 'stderr',
\ 'executable_callback': 'ale_linters#sh#shell#GetExecutable',
\ 'command_callback': 'ale_linters#sh#shell#GetCommand',
\ 'callback': 'ale_linters#sh#shell#Handle',
\})
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