Add asynchronous linting plugin for vim

vim/plugin/async_lint.vim

@@ -0,0 +1,41 @@
+function s:async_lint_done(bufnr, buffer)
+	if getbufvar(a:bufnr, "lint_job")!=""
+		call getbufvar(a:bufnr, "")
+		let l:pos = getcurpos()
+		call deletebufline(bufname(a:bufnr), 1, "$")
+		for line in a:buffer
+			call appendbufline(bufname(a:bufnr), "$", line)
+		endfor
+		call deletebufline(bufname(a:bufnr), 1)
+		call setpos(".", l:pos)
+		call setbufvar(a:bufnr, "lint_job", "")
+	end
+endfun
+
+function s:async_lint_abort(bufnr)
+	let l:job = getbufvar(a:bufnr, "lint_job")
+	if l:job!=""
+		call job_stop(l:job)
+	end
+	call setbufvar(a:bufnr, "lint_job", "")
+endfun
+
+function s:async_lint(bufnr, command)
+	if getbufvar(a:bufnr, "lint_job")==""
+		let l:buffer = []
+		let l:job = job_start(a:command, {
+		\ "in_io": "buffer", "in_name": bufname(a:bufnr),
+		\ "out_io": "pipe",
+		\ "out_cb": { pipe, text -> add(l:buffer, text) },
+		\ "close_cb": { pipe -> s:async_lint_done(a:bufnr, l:buffer) }
+		\ })
+		call setbufvar(a:bufnr, "lint_job", l:job)
+	end
+endfun
+
+augroup ASYNC_LINT
+	au TextChanged * call s:async_lint_abort(bufnr("%"))
+	au TextChangedI * call s:async_lint_abort(bufnr("%"))
+	au TextChangedP * call s:async_lint_abort(bufnr("%"))
+augroup END
+