Code chunks not loading syntax files from runtimepath

[richyliu]

The latest commit (8d15716386010ea3d4be5d6870ce9d35ededc6fa) broke my Rmarkdown/vimtex setup because it no longer searches the runtimepath for the correct syntax files for highlighting.

I propose we revert the commit. There shouldn't be any issues with the syntax file not found, since the user can always configure which files are highlighted with g:rmd_fenced_languages.

Also, vim-markdown (https://github.com/tpope/vim-markdown/blob/891dff54a92b04cda36da7fbc6634831c3389d29/syntax/markdown.vim#L36) has the same behavior.

Alternatively we could prefix the exe call with silent! to suppress errors, like so:

silent! exe 'syn include @Rmd'.s:nm.' syntax/'.s:ft.'.vim'

[jalvesaq]

Prefixing the command with !silent does not supress the error message:

let g:markdown_fenced_languages = ['python', 'notafiletype']

[jalvesaq]

But I'm reverting the commit, as you suggested. Thanks!

[richyliu]

Thanks for reverting.

With your example, I was able to suppress the error message with this silent! (not `!silent):

diff --git a/syntax/rmd.vim b/syntax/rmd.vim
index 7755019..ab86289 100644
--- a/syntax/rmd.vim
+++ b/syntax/rmd.vim
@@ -79,7 +79,7 @@ for s:type in g:rmd_fenced_languages
     let s:nm  = s:type
   endif
   unlet! b:current_syntax
-  exe 'syn include @Rmd'.s:nm.' syntax/'.s:ft.'.vim'
+  silent! exe 'syn include @Rmd'.s:nm.' syntax/'.s:ft.'.vim'
   if g:rmd_syn_hl_chunk
     exe 'syn region rmd'.s:nm.'ChunkDelim matchgroup=rmdCodeDelim start="^\s*```\s*{\s*=\?'.s:nm.'\>" matchgroup=rmdCodeDelim end="}$" keepend containedin=rmd'.s:nm.'Chunk contains=@Rmdr'
     exe 'syn region rmd'.s:nm.'Chunk start="^\s*```\s*{\s*=\?'.s:nm.'\>.*$" matchgroup=rmdCodeDelim end="^\s*```\ze\s*$" keepend contains=rmd'.s:nm.'ChunkDelim,@Rmd'.s:nm

The vim manual for :sil[ent][!] {command} says:

When [!] is added, error messages will also be skipped