" ==================================================
" Transparent editing of gpg encrypted files.
" ==================================================
"
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 BufReadPre,FileReadPre      *.gpg let shsave=&sh
  autocmd BufReadPre,FileReadPre      *.gpg let &sh='sh'
  autocmd BufReadPre,FileReadPre      *.gpg let ch_save = &ch|set ch=2
  autocmd BufReadPost,FileReadPost    *.gpg '[,']!gpg --decrypt --default-recipient-self 2> /dev/null
  autocmd BufReadPost,FileReadPost    *.gpg let &sh=shsave
  " 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 set bin
  autocmd BufWritePre,FileWritePre    *.gpg let shsave=&sh
  autocmd BufWritePre,FileWritePre    *.gpg let &sh='sh'
  autocmd BufWritePre,FileWritePre    *.gpg '[,']!gpg --encrypt --default-recipient-self 2>/dev/null
  autocmd BufWritePre,FileWritePre    *.gpg let &sh=shsave
  " Undo the encryption so we are back in the normal text, directly
  " after the file has been written.
  autocmd BufWritePost,FileWritePost  *.gpg silent u
  autocmd BufWritePost,FileWritePost  *.gpg set nobin
augroup END

" vim:set et sw=2: