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path: root/ale_linters/tex/chktex.vim
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" Author: Andrew Balmos - <andrew@balmos.org>
" Description: chktex for LaTeX files

let g:ale_tex_chktex_executable =
\   get(g:, 'ale_tex_chktex_executable', 'chktex')

let g:ale_tex_chktex_options =
\   get(g:, 'ale_tex_chktex_options', '-I')

function! ale_linters#tex#chktex#GetCommand(buffer) abort
  " Check for optional .chktexrc
  let l:chktex_config = ale#util#FindNearestFile(
  \   a:buffer,
  \   '.chktexrc')

  let l:command = g:ale_tex_chktex_executable
  " Avoid bug when used without -p (last warning has gibberish for a filename)
  let l:command .= ' -v0 -p stdin -q'

  if !empty(l:chktex_config)
    let l:command .= ' -l ' . fnameescape(l:chktex_config)
  endif

  let l:command .= ' ' . g:ale_tex_chktex_options

  return l:command
endfunction

function! ale_linters#tex#chktex#Handle(buffer, lines) abort
  " Mattes lines like:
  "
  " stdin:499:2:24:Delete this space to maintain correct pagereferences.
  " stdin:507:81:3:You should enclose the previous parenthesis with `{}'.
  let l:pattern = '^stdin:\(\d\+\):\(\d\+\):\(\d\+\):\(.\+\)$'
  let l:output = []

  for l:line in a:lines
    let l:match = matchlist(l:line, l:pattern)

    if len(l:match) == 0
      continue
    endif

    call add(l:output, {
    \   'bufnr': a:buffer,
    \   'lnum': l:match[1] + 0,
    \   'vcol': 0,
    \   'col': l:match[2] + 0,
    \   'text': l:match[4] . ' (' . (l:match[3]+0) . ')',
    \   'type': 'W',
    \   'nr': -1
    \})
  endfor

  return l:output
endfunction

call ale#linter#Define('tex', {
\   'name': 'chktex',
\   'executable': 'chktex',
\   'command_callback': 'ale_linters#tex#chktex#GetCommand',
\   'callback': 'ale_linters#tex#chktex#Handle'
\})