You need to use :execute
to evaluate a variable in most Ex commands. Vim variables do not have a $
prefix, those are environment variables (which you can reference from Vimscript, too):
execute 'source' vimfolder . '/settings.vim'
However, in this particular case, I'd rather add the location to 'runtimepath'
and then use :runtime
:
set runtimepath+=~/Google\ Drive/Dropbox/Fresh\ Install/Shell/vim
runtime settings.vim
Another alternative is symbolic links, so you don't have change anything in your Vim setup.