[pacman-dev] Downgradability...sort of....

[Xavier]

On Fri, Nov 7, 2008 at 9:36 AM, Jatheendra <jatheendra at gmail.com> wrote:
> Hi all,
> Im trying to add some downgradability magic into pacman .Being quite
> new to pacman code, i need your help  to identify the possible
> pitfalls of my approach before trying something.
>
> What i plan to do is..
>
> In libalpm/remove.c  unlink_file()  [ I guess remove.c is the only
> place where we are removing files ]
>
> replace all unlink(), rename() etc with  copyandunlink , copyandrename
> etc which will copy the file first into an archive file
> package-backup.tgs in cache,then do unlink or rename. Then finally
> include  all the necessary .INSTALL ,PKGINFO ,.CHANGELOG etc and clean
> up.
>
> So even if i do a -Scc i will have a backup of what was installed on
> my system and can roll back to the previous state.
>
> And can sombody please point me to some documentation for libarchive
> apart from the manpages...
>

This does not make any sense. People who run -Scc don't want to keep
any packages because they take space.