Hello, Quoting Guillem Jover (2023-06-14 20:29:17) > > I'm quite certain about the version requirement because I did tests using > > debbisect and using the suggestion below I'm able to create chroots for all > > of unstable since 2006-08-10. > > So just to clarify, old and new dpkg in normal conditions works fine > for a long time when the available file is not present (since 1.17.11 as > you point out). The problem here as hinted at below is that apt tries to > set the package selections via «dpkg --set-selections» after having > refreshed the available file via «dpkg --merge-avail» where both these > commands fail if the available file is missing with versions earlier > than 1.20.0.
aha, then I tested the wrong thing! I'm now able to verify the correct dpkg version required for dpkg --set-selections without /var/lib/apt/available using: debbisect --depends=dpkg --cache=./cache 20200627T025456Z 20200627T085709Z '! echo | /usr/sbin/chroot "$1" dpkg --set-selections' ... bisection finished successfully last good timestamp: 20200627T025456Z first bad timestamp: 20200627T085709Z only one package differs: dpkg 1.19.7 -> 1.20.1 > > Try running mmdebstrap with > > > > --hook-dir=/usr/share/mmdebstrap/hooks/jessie-or-older > > > > which will unconditionally do certain things only necessary for old > > releases. > > > > If you instead use > > > > --hook-dir=/usr/share/mmdebstrap/hooks/maybe-jessie-or-older > > > > some detection code will only run the hook if necessary (in case you do not > > know upfront which release you are creating a chroot for). > > Yeah I mentioned this also to Mika, but also encouraged him to file > this report as I think it might make sense for these hooks to be > adapted to cover up to buster out of the box. > > Initially I thought that perhaps only the variants that end up with > apt installed so that it can work correctly, but given that with older > dpkg versions some of these actions will always fail, then perhaps it > makes sense to still add those unconditionally so that users do not > need to create the file manually if they use the other dpkg actions. > > (Hope this clarifies things! :) yes, thank you for finding and reporting this bug! I'm unsure how to fix it... maybe by introducing a maybe-buster-or-older hook which automatically pulls in the jessie-or-older hook? Thanks! cheers, josch
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