+" Author: nametake https://nametake.github.io
+" Description: apiblueprint parser
+
+function! ale_linters#apiblueprint#drafter#HandleErrors(buffer, lines) abort
+ " Matches patterns line the following:
+ "
+ " warning: (3) unable to parse response signature, expected 'response [<HTTP status code>] [(<media type>)]'; line 4, column 3k - line 4, column 22
+ " warning: (10) message-body asset is expected to be a pre-formatted code block, separate it by a newline and indent every of its line by 12 spaces or 3 tabs; line 30, column 5 - line 30, column 9; line 31, column 9 - line 31, column 14; line 32, column 9 - line 32, column 14
+ let l:pattern = '\(^.*\): (\d\+) \(.\{-\}\); line \(\d\+\), column \(\d\+\) - line \d\+, column \d\+\(.*; line \d\+, column \d\+ - line \(\d\+\), column \(\d\+\)\)\{-\}$'
+ let l:output = []
+
+ for l:match in ale#util#GetMatches(a:lines[2:], l:pattern)
+ let l:item = {
+ \ 'type': l:match[1] is# 'warning' ? 'W' : 'E',
+ \ 'text': l:match[2],
+ \ 'lnum': l:match[3] + 0,
+ \ 'col': l:match[4] + 0,
+ \}
+
+ if l:match[5] isnot# ''
+ let l:item.end_lnum = l:match[6] + 0
+ let l:item.end_col = l:match[7] + 0
+ endif
+
+ call add(l:output, l:item)
+ endfor
+
+ return l:output
+endfunction
+
+
+call ale#linter#Define('apiblueprint', {
+\ 'name': 'drafter',
+\ 'output_stream': 'stderr',
+\ 'executable': 'drafter',
+\ 'command': 'drafter --use-line-num --validate',
+\ 'callback': 'ale_linters#apiblueprint#drafter#HandleErrors',
+\})