How to modify filetype detection for filename extension?

Neovim
1

I’m trying to change the filetype of a certain file extension by directly modifying /usr/share/nvim/runtime/lua/vim/filetype.lua. For example this is the diff:

@@ -1049,7 +1049,7 @@
   txi = 'texinfo',
   texinfo = 'texinfo',
   text = 'text',
-  tfvars = 'terraform-vars',
+  tfvars = 'terraform',
   thrift = 'thrift',
   tla = 'tla',
   tli = 'tli',

However, opening *.tfvars file still ended up with ‘terraform-vars’ filetype being set. Why doesn’t it work?

2

Many .lua files are compiled into the nvim binary, so modify the source file doesn’t work. You can use vim.filetype.add() to modify filetype detection:

:lua vim.filetype.add({ extension = { tfvars = 'terraform' } })
1 Like
3

Many thanks for this information