Mark H Weaver <m...@netris.org> skribis:
> Andreas Enge <andr...@enge.fr> writes:
>
>> when trying to package the neon library:
>> http://www.webdav.org/neon/ ,
>> the tests fail inside the chroot with
>> addr_reverse (reverse lookup for 127.0.0.1 failed)
>>
>> Should I disable the corresponding test?
>
> I think we should include /etc/hosts in the chroot with an entry for
> localhost. We might also need /etc/nsswitch.conf; I'm not sure. I see
> no reason not to do this, and I suspect it would ultimately take less
> time and effort than disabling tests.
Actually, I just discovered that it’s been the case since before Guix
was even started. :-)
nix/libstore/build.cc reads this:
/* Create /etc/hosts with localhost entry. */
writeFile(chrootRootDir + "/etc/hosts", "127.0.0.1 localhost\n");
So lookups of ‘localhost’ should just work.
To make sure this is the case, try this:
--8<---------------cut here---------------start------------->8---
#!/path/to/bin/guile -s
!#
(use-modules (guix) (guix monads))
(define (with-/etc/hosts?)
(define b
'(and (file-exists? "/etc/hosts")
(getaddrinfo "localhost")
(call-with-output-file (assoc-ref %outputs "out")
(const #t))))
(mlet* %store-monad ((d (derivation-expression "etc-hosts" b)))
(built-derivations (list d))))
(let* ((s (open-connection)))
(run-with-store s (with-/etc/hosts?)))
--8<---------------cut here---------------end--------------->8---
I don’t think nsswitch.conf will be necessary.
Thanks,
Ludo’.
