Find Ruby File Usages With Vim

ruby.vim

function! RemoveLibPrefix(path)
  let shortenedPath = split(a:path, "/")[1:]
  return join(shortenedPath, "/")
endfunction

function! FindCurrentFileUsage()
  let filePath = RemoveLibPrefix(@%)
  let rubyPath = substitute(filePath, ".rb", "", "")
  exec "silent grep! " . rubyPath . " **/*.rb"
  exec "copen"
  exec "redraw!"
endfunction

command! FindCurrentFileUsage call FindCurrentFileUsage()
nnoremap ,gcf :FindCurrentFileUsage<CR>