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Builds that pass locally but fail on sbuild? (Re: Reviving schroot as used by sbuild)

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Hi Simon!

> There are lots of options for doing this, some of which are listed in
> <https://wiki.debian.org/SystemBuildTools#Package_build_tools>.
>
> All of these have the same problem as cowbuilder, pbuilder, and any
> other solution that is not sbuild + schroot: it isn't (currently) what
> the production Debian buildds use, therefore it is entirely possible
> (perhaps even likely, depending on what packages you maintain) that your
> package will build successfully and pass tests in your own local builder,
> but then fail to build or fail tests on the buildds as a result of some
> quirk of how schroot sets up its chroots, which is a worse-than-RC bug
> making the package unreleasable.

Could you point me to some Debian Bug # or otherwise share examples of
cases when a build succeeded locally but failed on official Debian
builders due to something that is specific for sbuild/schroot?

I have never run in such a situation despite doing Debian packaging
for 10 years with fairly complex C++ software targeting all archs
Debian supports. Also as a member of the Salsa-CI team I don't recall
ever seeing a bug report about something built on Salsa in a container
successfully but failed to build on actual buildd.

I am not dismissive of your claim - as a very senior DD you surely
have those experiences - I am just curious to learn what those cases
might have been.

I could imagine that buildd builds fail if they the source was
prepared in a non-hermetic environment that ran as root, or had
network access, or if build environment was unclean and debian/control
was missing some dependencies, but that is elementary hermetic build
environment properties and not inherently something that *only*
sbuild/schroot does.

Related, you might want to take a peek at the source code of
https://salsa.debian.org/otto/debcraft how it supports both Podman and
Docker, and how it generates the 'root.tar.gz' equivalent container
automatically based on debian/control and debian/changelog contents,
and then runs the actual build as a regular non-root user in a
container that has no network access. If I learn about other
requirements for a hermetic build environment I would be happy to
incorporate it.

- Otto

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Reviving schroot as used by sbuild Helmut Grohne <helmut@subdivi.de> - 2024-06-25 10:20 +0200
  Re: Reviving schroot as used by sbuild Johannes Schauer Marin Rodrigues <josch@debian.org> - 2024-06-25 11:40 +0200
  Re: Reviving schroot as used by sbuild Simon McVittie <smcv@debian.org> - 2024-06-25 15:10 +0200
    Re: Reviving schroot as used by sbuild Andrey Rakhmatullin <wrar@debian.org> - 2024-06-25 15:30 +0200
    Re: Reviving schroot as used by sbuild Faidon Liambotis <paravoid@debian.org> - 2024-06-25 15:30 +0200
    Re: Reviving schroot as used by sbuild Antonio Terceiro <terceiro@debian.org> - 2024-06-25 17:30 +0200
    Re: Reviving schroot as used by sbuild Russ Allbery <rra@debian.org> - 2024-06-25 18:40 +0200
      Re: Reviving schroot as used by sbuild Guillem Jover <guillem@debian.org> - 2024-06-25 18:50 +0200
        Re: Reviving schroot as used by sbuild Marco d'Itri <md@Linux.IT> - 2024-06-25 19:10 +0200
        Re: Reviving schroot as used by sbuild Russ Allbery <rra@debian.org> - 2024-06-25 19:30 +0200
          Re: Reviving schroot as used by sbuild Andrey Rakhmatullin <wrar@debian.org> - 2024-06-25 19:40 +0200
          Re: Reviving schroot as used by sbuild Russ Allbery <rra@debian.org> - 2024-06-25 19:50 +0200
          Re: Reviving schroot as used by sbuild PICCA Frederic-Emmanuel <frederic-emmanuel.picca@synchrotron-soleil.fr> - 2024-06-25 19:50 +0200
        Re: Reviving schroot as used by sbuild Simon McVittie <smcv@debian.org> - 2024-06-26 18:10 +0200
      Re: Reviving schroot as used by sbuild Simon McVittie <smcv@debian.org> - 2024-06-25 19:00 +0200
    Re: Reviving schroot as used by sbuild Helmut Grohne <helmut@subdivi.de> - 2024-06-25 19:00 +0200
      autopkgtest + podman user experience (Was: Re: Reviving schroot as  used by sbuild) Gioele Barabucci <gioele@svario.it> - 2024-06-25 20:20 +0200
        Re: autopkgtest + podman user experience (Was: Re: Reviving schroot  as used by sbuild) Paul Gevers <elbrus@debian.org> - 2024-06-25 22:20 +0200
      Re: Reviving schroot as used by sbuild Paul Gevers <elbrus@debian.org> - 2024-06-25 22:00 +0200
      Re: Reviving schroot as used by sbuild Stefano Rivera <stefanor@debian.org> - 2024-06-26 18:40 +0200
      Re: Reviving schroot as used by sbuild Simon McVittie <smcv@debian.org> - 2024-06-26 19:20 +0200
        Re: Reviving schroot as used by sbuild Reinhard Tartler <siretart@gmail.com> - 2024-06-27 00:10 +0200
        Re: Reviving schroot as used by sbuild Helmut Grohne <helmut@subdivi.de> - 2024-06-27 13:50 +0200
          Re: Reviving schroot as used by sbuild Reinhard Tartler <siretart@gmail.com> - 2024-06-27 14:10 +0200
          Re: Reviving schroot as used by sbuild Simon McVittie <smcv@debian.org> - 2024-06-27 16:00 +0200
            Re: Reviving schroot as used by sbuild Johannes Schauer Marin Rodrigues <josch@debian.org> - 2024-06-27 17:30 +0200
              Re: Reviving schroot as used by sbuild Simon McVittie <smcv@debian.org> - 2024-06-27 19:20 +0200
                Re: Reviving schroot as used by sbuild Johannes Schauer Marin Rodrigues <josch@debian.org> - 2024-06-27 23:10 +0200
    reproducible Debian containers exists today (Re: Reviving schroot as  used by sbuild) Holger Levsen <holger@layer-acht.org> - 2024-06-26 11:20 +0200
    Re: Reviving schroot as used by sbuild Bastian Venthur <venthur@debian.org> - 2024-06-27 11:00 +0200
      Re: Reviving schroot as used by sbuild Simon McVittie <smcv@debian.org> - 2024-06-27 19:40 +0200
        Builds that pass locally but fail on sbuild? (Re: Reviving schroot as  used by sbuild) Otto Kekäläinen <otto@debian.org> - 2024-06-28 05:00 +0200
          Re: Builds that pass locally but fail on sbuild? (Re: Reviving  schroot as used by sbuild) Simon McVittie <smcv@debian.org> - 2024-06-28 12:00 +0200
          Re: Builds that pass locally but fail on sbuild? (Re: Reviving schroot as used by sbuild) Richard Lewis <richard.lewis.debian@googlemail.com> - 2024-06-29 18:20 +0200
            Re: Builds that pass locally but fail on sbuild? (Re: Reviving  schroot as used by sbuild) Sam Hartman <hartmans@debian.org> - 2024-06-30 00:00 +0200
    Re: Reviving schroot as used by sbuild Philipp Kern <pkern@debian.org> - 2024-07-01 09:20 +0200
      Re: Reviving schroot as used by sbuild Simon McVittie <smcv@debian.org> - 2024-07-01 18:00 +0200
        Re: Reviving schroot as used by sbuild Reinhard Tartler <siretart@gmail.com> - 2024-07-01 21:20 +0200
      Re: Reviving schroot as used by sbuild Helmut Grohne <helmut@subdivi.de> - 2024-07-06 18:40 +0200
  Re: Reviving schroot as used by sbuild Leandro Cunha <leandrocunha016@gmail.com> - 2024-06-25 20:00 +0200
  Re: Reviving schroot as used by sbuild Sam Hartman <hartmans@debian.org> - 2024-06-28 15:10 +0200
    Re: Reviving schroot as used by sbuild Helmut Grohne <helmut@subdivi.de> - 2024-09-14 12:00 +0200
      Re: Reviving schroot as used by sbuild Simon McVittie <smcv@debian.org> - 2024-09-14 12:40 +0200

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