ALE Linter for commitlint

commitlint.vim

function! ale_linters#gitcommit#commitlint#Handle(buffer, lines) abort
    " Matches patterns line the following:
    let l:pattern = '^\(✖\|⚠\)\s\+\(.*\) \(\[.*\]\)$'
    let l:output = []
    let l:line = getline(1)

    if l:line[0] != '#'
        for l:match in ale#util#GetMatches(a:lines, l:pattern)
            let l:item = {
            \   'lnum': 1,
            \   'text': l:match[2],
            \   'code': l:match[3],
            \   'type': l:match[1] is# '✖' ? 'E' : 'W',
            \}

            call add(l:output, l:item)
        endfor
    endif

    return l:output
endfunction

call ale#linter#Define("gitcommit", {
  \ 'name': 'commitlint',
  \ 'executable': 'commitlint',
  \ 'command': 'commitlint -c false',
  \ 'output_stream': 'stdout',
  \ 'callback': 'ale_linters#gitcommit#commitlint#Handle',
  \ })