Add support for textidote (LaTeX and Markdown linter)

[dkasak]

Name: textidote URL: https://github.com/sylvainhalle/textidote

This is a linter for LaTeX which strips away LaTeX commands, but remembering the original positions of the text. It then passes the text to LanguageTool and can map errors from it back to the correct LaTeX source file locations.

They also recently added support for Markdown.

[jagjordi]

" Author: Jordi Altayo <jordiag@kth.se>
" Description: support for textidote grammar and syntax checker

let g:ale_tex_textidote_executable = 'textidote'
let g:ale_tex_textidote_options = '--output singleline'

function! ale_linters#tex#textidote#Handle(buffer, lines) abort
    let l:pattern = '.*' . expand('%:t:r') . '\.tex(L\(\d\+\)C\(\d\+\)-L\d\+C\d\+): \(.*\)".*"'
    let l:output = []

    for l:match in ale#util#GetMatches(a:lines, l:pattern)
        call add(l:output, {
        \   'lnum': l:match[1] + 0,
        \   'col' : l:match[2] + 0,
        \   'text': l:match[3],
        \   'type': 'E',
        \})
    endfor

    return l:output
endfunction

call ale#linter#Define('tex', {
\   'name': 'textidote',
\   'output_stream': 'stdout',
\   'executable': 'textidote',
\   'command': 'textidote --no-color --output singleline ' . expand('%'),
\   'callback': 'ale_linters#tex#textidote#Handle',
\})

Right now I don't have time to write the tests and create the pull request (will do it at some point) but this works with textidote, just place it under .vim/plugged/ale/ale_linters/tex/textidote.vim

[nospam2998]

Please see quote from :help ale#linter#Define below. It should be safe to skip setting output_stream.

This argument defaults to 'stdout'.