Rename2.vim

" Rename2.vim  -  Rename a buffer within Vim and on disk
"
" Copyright July 2009 by Manni Heumann <vim at lxxi.org>
"
" based on Rename.vim
" Copyright June 2007 by Christian J. Robinson <infynity@onewest.net>
"
" Distributed under the terms of the Vim license.  See ":help license".
"
" Usage:
"
" :Rename[!] {newname}

command! -nargs=* -complete=file -bang Rename :call Rename("<args>", "<bang>")

function! Rename(name, bang)
    let l:curfile = expand("%:p")
    let l:curfilepath = expand("%:p:h")
    let l:newname = l:curfilepath . "/" . a:name
    let v:errmsg = ""
    silent! exe "saveas" . a:bang . " " . l:newname
    if v:errmsg =~# '^$\|^E329'
        if expand("%:p") !=# l:curfile && filewritable(expand("%:p"))
            silent exe "bwipe! " . l:curfile
            if delete(l:curfile)
                echoerr "Could not delete " . l:curfile
            endif
        endif
    else
        echoerr v:errmsg
    endif
endfunction