Saturday, February 25, 2023

Augmenting filetype detection for supplemental types

Attempting to set multiple filetypes based on something like

autocmd FileType foo if ... | set filetype=foo.bar | endif

seems to have an ordering problem with the FileType autocmd that sets
'syntax' -- the "foo.bar" filetype is set, requisite files for "bar" are
loaded, and then the autocmd waiting on the original expansion of <afile>
to "foo" runs and effectively resets the syntax.

Is there a way to tack on a supplemental filetype without running into
this problem? The obvious approach of setting the whole string at once
works, but that requires duplicating everything that could otherwise
determine the initial filetype...

-Rob

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