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

dot_vim/plugged/pony-vim-syntax/syntax_checkers/pony/ponyc.vim

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+"============================================================================
+"File:        ponyc.vim
+"Description: Syntax checking plugin for syntastic.vim
+"Maintainer:  Earnestly
+"License:     This program is free software. It comes without any warranty,
+"             to the extent permitted by applicable law.
+"
+"============================================================================
+
+if exists('g:loaded_syntastic_pony_ponyc_checker')
+    finish
+endif
+let g:loaded_syntastic_pony_ponyc_checker = 1
+
+let s:save_cpo = &cpo
+set cpo&vim
+
+function! SyntaxCheckers_pony_ponyc_GetLocList() dict
+
+    " This is currently a hack.  `ponyc` itself uses the project directory as
+    " the target to build.  Using expand like this fetches the parent
+    " directory of the current file which might cause supurious errors on
+    " package imports if the current file is nested under a sub-directory.
+    let n = expand('%:p:h')
+
+    let makeprg = self.makeprgBuild({
+                \ 'args': '--pass=expr',
+                \ 'fname': n})
+
+    let errorformat =
+                \ '%f:%l:%c: %m'
+
+    return SyntasticMake({
+                \ 'makeprg': makeprg,
+                \ 'errorformat': errorformat })
+endfunction
+
+call g:SyntasticRegistry.CreateAndRegisterChecker({
+            \ 'filetype': 'pony',
+            \ 'name': 'ponyc'})
+
+let &cpo = s:save_cpo
+unlet s:save_cpo