nvim: configure Neoformat for tfvars files

nvim/.config/nvim/plugins.vim

@@ -143,3 +143,16 @@ let g:neoformat_basic_format_trim = 1
 
 " For shell formatting
 let g:shfmt_opt="-ci -i 4 -sr"
+
+" Terraform tfvars files
+let g:neoformat_tfvars_terraform = {
+    \ 'exe': 'terraform',
+    \ 'args': ['fmt', '-'],
+    \ 'stdin': 1,
+    \ }
+
+" Associate .tfvars with the 'tfvars' filetype if not already set
+autocmd BufRead,BufNewFile *.tfvars set filetype=tfvars
+
+" Enable neoformat for .tfvars using terraform fmt
+let g:neoformat_enabled_tfvars = ['terraform']