I broke up with neovim....vim is my best friend now

dot_vim/plugged/vimtex/compiler/chktex.vim

@@ -0,0 +1,18 @@
+if exists('current_compiler') | finish | endif
+let current_compiler = 'chktex'
+
+let s:cpo_save = &cpo
+set cpo&vim
+
+" Ensure VimTeX options are loaded
+call vimtex#options#init()
+
+let &l:makeprg = printf('chktex --quiet --verbosity=4 %s %s',
+      \ g:vimtex_lint_chktex_parameters,
+      \ g:vimtex_lint_chktex_ignore_warnings)
+let &l:errorformat = '%A"%f"\, line %l: %m'
+      \ . ',%-Z%p^'
+      \ . ',%-C%.%#'
+
+let &cpo = s:cpo_save
+unlet s:cpo_save