Question

How do I set up filetype and/or syntax for files that have no extension in vim?

Note

This is a duplicate of vim default syntax for files with no extension. I’m asking again because no one has answered it properly in my view.

I don’t want to know how to set the default syntax for unrecognized file types, I want to know how to set it only for extensionless files.

Answer 1

You can create an autocommand that checks if the filename contains a ., and if not, switches to a given syntax:

autocmd BufNewFile,BufRead * if expand('%:t') !~ '\.' | set syntax=perl | endif

This one picks perl as a default syntax, but you can simply use whichever is appropriate.