How to exclude filetype with autocmd to load language specific skeleton

Question

I have the following in order to use a different template per language. But I want English to be the default, if I don't specify .en.adoc in the filename. But the *.adoc,*.en.adoc also picks up *.fr.adoc with the result that I get an English and French header in my new *.fr.adoc. How can I avoid this?

autocmd BufNewFile *.adoc,*.en.adoc,~/translate/source/* 0r ~/.local/share/nvim/templates/skeleton.en.adoc

autocmd BufNewFile *.fr.adoc,~/translate/*/target/* 0r ~/.local/share/nvim/templates/skeleton.fr.adoc

Answer 1

The reason for this is that both *.adoc and *.fr.adoc match for foo.fr.adoc, so both autocmds are run.

The documentation for autocmd patterns is at :help file-pattern; looking at it, doing a robust "match *.adoc but not fr.adoc" is a bit tricky (though not impossible). Personally, I would opt for just an if:

autocmd BufNewFile *.adoc
            \  if bufname('')[-8:] is# '.fr.adoc'
            \|   :0r ~/.local/share/nvim/templates/skeleton.fr.adoc
            \| else
            \|   :0r ~/.local/share/nvim/templates/skeleton.en.adoc
            \| endif

If you have a lot of skeleton files, you can you look it up in a map let s:skel_files = {'fr.adoc': 'skeleton.fr.adoc'} etc. but for just two, an if should be fine.