Ranger as file explorer in vim

ranger-as-file-explorer-in-vim.vim

function RangerExplorer()
    exec "silent !ranger --choosefile=/tmp/vim_ranger_current_file " . expand("%:p:h")
    if filereadable('/tmp/vim_ranger_current_file')
        exec 'edit ' . system('cat /tmp/vim_ranger_current_file')
        call system('rm /tmp/vim_ranger_current_file')
    endif
    redraw!
endfun

map <Leader>x :call RangerExplorer()<CR>

" Explanation:
" * ranger --choosefile lets ranger act as a file choose (quit ranger on open file)
" * When the file can be read, edit its contents in vim
" * Afterwards delete the temporary file and refresh the screen