Re: [PATCH v2 0/3] Improving apt cache

[Uladzimir Bely <ubely@ilbers.de>]

In mail from пятница, 20 января 2023 г. 10:12:31 +03 user Roberto A. Foglietta 
wrote:
> On Fri, 20 Jan 2023 at 08:00, Uladzimir Bely <ubely@ilbers.de> wrote:
> > In mail from пятница, 20 января 2023 г. 08:08:03 +03 user Moessbauer,
> > Felix
> > 
> > wrote:
> > > On Fri, 2023-01-20 at 07:44 +0300, Uladzimir Bely wrote:
> > > > In mail from четверг, 19 января 2023 г. 17:52:37 +03 user Roberto A.
> > > > 
> > > > 
> > > > I see the following possible solutions that allows to save space.
> > > > 1. Since hardlinks don't work, try to use symlinks.
> > > 
> > > If that works, it clearly is the simplest solution.
> > 
> > Yes, approach with symlinks inside sbuild chroot seems to be working, so
> > I'm
> > going to use it in patchset v3.
> 
> The symlink or software link does not work for exportation... I presume,
> did you check?

Of course, if symlinks work inside sbuild chroot, whey won't work outside it 
(dl_dir import/export). So, that's how it's supposed to work:
- dl_dir_export: DL_DIR => hardlink => WORKDIR/rootfs
- sbuild chroot : WORKDIR/rootfs => symlink => /var/cache/apt/*.deb
- sbuild chroot: building the package, new .deb files downloaded
- sbuild chroot: /var/cache/apt/*.deb => copy => WORKIDIR/rootfs
- dl_dir_import: WORKDIR/rootfs => hardlink => DL_DIR
- remove WORKDIR/rootfs

> Without changing anything it is easy to confuse an old-built package with
> the nwer.
> 
> Best regards,