Hello, l...@gnu.org (Ludovic Courtès) skribis:
> Andreas Enge <andr...@enge.fr> skribis: > >> I am right now in the process of updating pari-gp to version 2.9.3. >> After building it on a git check-out of three days ago, which went smoothly, >> I rebased my patch on today's master and was pleased to see that no rebuild >> was needed: >> >> $ ./pre-inst-env guix build pari-gp -n >> outputs nothing. >> >> However, once the -n dropped, the gd package gets built. >> And then it is starting ruby, which has no connection to pari-gp: >> Downloading >> https://mirror.hydra.gnu.org/guix/nar/229n3pzp5bdmbdvwslg0dxliysas92k5-ruby-2.4.1.tar.xz... >> ruby-2.4.1.tar.xz 9.5MiB >> 22KiB/s 00:06 [ >> ] 1.3%^ > > “-n” now implies “--no-grafts” (commit > fd59105c49965db956fac73c68d8b00d068f5d5c). This was motivated by the > need to have -n really perform a dry run. > > The downside is that with -n we now see only half of the build plan, and > when we remove -n, we start with the other half of the build plan, > grafting. This is now fixed with this patch series: https://issues.guix.gnu.org/issue/40130 It does mean that “The following derivations will be built” can be printed several times during a build. That’s a natural consequence of having dynamic dependencies (grafts) in the graph: we can’t always statically determine what’s going to be built. > The “build continuation” idea of ‘wip-gexp-grafts’, discussed in > <https://bugs.gnu.org/22990>, could in theory help with that. ‘with-build-handler’ also has to do with continuations, only in a different way. :-) Ludo’.
