This is a vim plugin that provides CloudFormation syntax checking/highlighting. This requires the Syntastic plugin and cfn-lint.

Add to your ~/.vimrc:

Plugin 'speshak/vim-cfn'

Then run

vim +PluginInstall +qall

Add the following to ~/.vim/after/plugin/syntastic.vim:

let g:syntastic_cloudformation_checkers = ['cfn_lint']