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Re: tech-ctte: More specific advice regarding merged-/usr and implications of #978636

On Mon, 2022-07-18 at 22:10 +0200, Johannes Schauer Marin Rodrigues
> Hi,
> Quoting Luca Boccassi (2022-07-18 21:03:14)
> > It was renamed following a request on #debian-ftp while it was in
> > NEW, as the
> > feedback was that 'usrmerge' and 'usrmerged' were too similar and
> > thus easily
> > confused. The 'usrmerged' one can be disregarded and will be de-
> > crufted.
> I think that's very sensible.
> > > Does that sound okay to you and does the patch look like it does
> > > the right
> > > thing?
> > 
> > Yes, without knowing much about mmdebstrap, the diff looks good to
> > me.
> > I'd only ask that in the comment of the script hooks/no-merged-
> > usr/setup00.sh if you could please mention explicitly that it
> > creates an
> > unsupported system. Maybe even print a warning when it's called.
> Running mmdebstrap with --hook-dir=hooks/no-merged-usr will now print
> the
> following to stderr:
> Warning: starting with Debian 12 (Bookworm), systems without merged-
> /usr are not supported anymore
> > Also, I assume it is creating the metapackage on-the-fly because it
> > doesn't
> > have the downloaded packages available at that point? Not a
> > problem, just
> > double checking.
> That is correct. But I think it's not ideal if mmdebstrap creates a
> chroot
> containing a package that doesn't come from the archive. I now
> extended the
> hook script such that calling mmdebstrap with --hook-
> dir=hooks/merged-usr will
> first install the custom built metapackage, then install the
> essential packages
> and then upgrade to the real usr-is-merged package.


> I think then the roadmap is to release debootstrap with #71 merged,
> then upload
> init-system-helpers that depends "usrmerge | usr-is-merged" and then
> I test and
> upload mmdebstrap including those hook scripts. Since those are just
> hooks,
> nothing stops people from using them with the mmdebstrap version
> currently in
> unstable and testing, so nothing should be blocked by this in case I
> should
> need longer to release an mmdebstrap version shipping these hook
> scripts.

That's great. Currently waiting on usrmerge=29 to migrate to testing,
then the deboostrap change becomes mergeable. Also waiting on Simon to
clarify a few things regarding buildds and the plan around that -
depending on the outcome, the plan w.r.t. debootstrap might change
slightly or not.

Kind regards,
Luca Boccassi

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