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

dot_vim/plugged/vimtex/compiler/lacheck.vim

@@ -0,0 +1,11 @@
+if exists('current_compiler') | finish | endif
+let current_compiler = 'lacheck'
+
+let s:cpo_save = &cpo
+set cpo&vim
+
+CompilerSet makeprg=lacheck\ %:S
+CompilerSet errorformat="%f",\ line\ %l:\ %m
+
+let &cpo = s:cpo_save
+unlet s:cpo_save