" Transparent editing of gpg encrypted files.
" By Wouter Hanegraaff <wouter@blub.net>
augroup encrypted
    au!

    " First make sure nothing is written to ~/.viminfo while editing
    " an encrypted file.
    autocmd BufReadPre,FileReadPre      *.gpg set viminfo=
    " We don't want a swap file, as it writes unencrypted data to disk
    autocmd BufReadPre,FileReadPre      *.gpg set noswapfile
    " Switch to binary mode to read the encrypted file
    autocmd BufReadPre,FileReadPre      *.gpg set bin
    autocmd BufReadPre,FileReadPre      *.gpg let ch_save = &ch|set ch=2
    autocmd BufReadPost,FileReadPost    *.gpg '[,']!gpg --decrypt 2> /dev/null
    " Switch to normal mode for editing
    autocmd BufReadPost,FileReadPost    *.gpg set nobin
    autocmd BufReadPost,FileReadPost    *.gpg let &ch = ch_save|unlet ch_save
    autocmd BufReadPost,FileReadPost    *.gpg execute ":doautocmd BufReadPost " . expand("%:r")

    " Convert all text to encrypted text before writing
    autocmd BufWritePre,FileWritePre    *.gpg   '[,']!gpg --default-recipient-self -ae 2>/dev/null
    " Undo the encryption so we are back in the normal text, directly
    " after the file has been written.
    autocmd BufWritePost,FileWritePost    *.gpg   u
augroup END
