Re: [gentoo-portage-dev] Undo feature in portage-ng ?

[Sven Vermeulen <swift@gentoo.org>]

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On Tue, Jun 08, 2004 at 11:22:09PM +0100, Md Mooktakim Ahmed wrote:
> Or maybe a snapshot feature for /etc (using CVS type technology) so that 
> go-back feature is available.
> The snapshot should be done at every installation of a package.

Shouldn't be that difficult to implement, not even with the current Portage.
But first get acquainted with RCS (emerge app-text/rcs) which is useful for
text files (such as configuration files).

What you can do as well is to have FEATURES="buildpkg" enabled and take a
snapshot of your Portage tree before you update it. Then update the Portage
tree and your system. If things fail, reinstate the snapshot and update your
system once again. IIRC, Portage should automatically 'downgrade' your
system to the previous state. By using the binaries created before
downgrading doesn't take that much time.

One small hickup though: configuration files! So it's still wise to keep the
important ones in RCS.

Wkr,
      Sven Vermeulen

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