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Groups > linux.debian.devel > #101610

Re: Require packages to build without any configured DNS

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On Wed, Sep 8, 2021 at 8:23 PM Thomas Goirand wrote:

> Later on, the class calls the method read_resolv_conf that has:

It also fails if the file exists but has no nameservers:

        if len(self.nameservers) == 0:
            raise NoResolverConfiguration

> So, any test case that does that fails simply because the *FILE*
> /etc/resolv.conf isn't there on the filesystem (and not because there's
> no working DNS server, which would be just fine).

That seems like a bug in the test cases, they shouldn't be testing the
build time environment like that, since it could differ from the
runtime environment. There are nss_wrapper/resolv_wrapper for mocking
away the build-time DNS resolving infrastructure.

https://cwrap.org/nss_wrapper.html
https://cwrap.org/resolv_wrapper.html

> One could argue that the test cases should aways instantiate the
> Resolver object with a non-default (test only) filename argument.

Agreed.

> I agree with that: please propose such a patch upstream. But does it
> deserve anyone time? I don't think so. We're achieving absolutely
> nothing doing this: this doesn't improve Debian...

It improves support for offline systems, which often don't have a
working /etc/resolv.conf

-- 
bye,
pabs

https://wiki.debian.org/PaulWise

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Thread

Require packages to build without any configured DNS Mattia Rizzolo <mattia@debian.org> - 2021-09-06 16:50 +0200
  Re: Require packages to build without any configured DNS Don Armstrong <don@debian.org> - 2021-09-08 01:50 +0200
    Re: Require packages to build without any configured DNS Adrian Bunk <bunk@debian.org> - 2021-09-08 15:00 +0200
  Re: Require packages to build without any configured DNS Thomas Goirand <zigo@debian.org> - 2021-09-08 16:20 +0200
    Re: Require packages to build without any configured DNS Pirate Praveen <praveen@onenetbeyond.org> - 2021-09-08 16:30 +0200
      Re: Require packages to build without any configured DNS Adrian Bunk <bunk@debian.org> - 2021-09-08 17:30 +0200
        Re: Require packages to build without any configured DNS Pirate Praveen <praveen@onenetbeyond.org> - 2021-09-09 00:00 +0200
          Re: Require packages to build without any configured DNS Paul Wise <pabs@debian.org> - 2021-09-09 06:50 +0200
  Re: Require packages to build without any configured DNS Helmut Grohne <helmut@subdivi.de> - 2021-09-08 18:00 +0200
    Re: Require packages to build without any configured DNS Adrian Bunk <bunk@debian.org> - 2021-09-08 19:10 +0200
    Re: Require packages to build without any configured DNS Thomas Goirand <zigo@debian.org> - 2021-09-08 22:30 +0200
      Re: Require packages to build without any configured DNS Paul Wise <pabs@debian.org> - 2021-09-09 06:50 +0200
        Re: Require packages to build without any configured DNS Adrian Bunk <bunk@debian.org> - 2021-09-09 09:40 +0200
          Re: Require packages to build without any configured DNS Thomas Goirand <zigo@debian.org> - 2021-09-12 21:10 +0200
      Re: Require packages to build without any configured DNS Josh Triplett <josh@joshtriplett.org> - 2021-09-10 11:00 +0200
        Re: Require packages to build without any configured DNS Thomas Goirand <zigo@debian.org> - 2021-09-12 21:10 +0200
          Re: Require packages to build without any configured DNS Josh Triplett <josh@joshtriplett.org> - 2021-09-13 06:20 +0200
  Re: Require packages to build without any configured DNS Josh Triplett <josh@joshtriplett.org> - 2021-09-08 18:10 +0200
    Re: Require packages to build without any configured DNS Adrian Bunk <bunk@debian.org> - 2021-09-10 22:40 +0200
      Re: Require packages to build without any configured DNS Don Armstrong <don@debian.org> - 2021-09-14 09:00 +0200
        Re: Require packages to build without any configured DNS Adrian Bunk <bunk@debian.org> - 2021-09-14 14:50 +0200
  Re: Require packages to build without any configured DNS Johannes Schauer Marin Rodrigues <josch@debian.org> - 2021-09-14 10:20 +0200
    Re: Require packages to build without any configured DNS Mattia Rizzolo <mattia@debian.org> - 2021-09-14 15:40 +0200
      Re: Require packages to build without any configured DNS Johannes Schauer Marin Rodrigues <josch@debian.org> - 2021-09-14 19:20 +0200
        Re: Require packages to build without any configured DNS Scott Kitterman <debian@kitterman.com> - 2021-09-14 19:50 +0200

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