Hello!
Ludovic Courtès <ludo@gnu.org> skribis:
Over the last few days I’ve been head-down working on
‘wip-build-systems-gexp’, the mythical branch that brings gexps to build
systems and packages, so we can say goodbye to
‘build-expression->derivation’. And… it’s quite a ride!
The current tip of ‘wip-build-systems-gexp’ Just Works; it’s being built,
it can build ‘guix’ and cross-build things like ‘sed’:
https://data.guix-patches.cbaines.net/repository/2/branch/wip-build-systems-gexp
https://ci.guix.gnu.org/jobset/wip-build-systems-gexp (though Cuirass
currently has unrelated problems)
In terms of performance, there’s still a ~10% slowdown when computing
derivations compared to the ‘core-updates’ revision the branch is based
on.
Here’s what I’d like to do in the coming days, if that doesn’t interfere
with what others have in mind for the upcoming release:
• Monitor build failures due to typos/thinkos made while adjusting
build systems;
• Merge on ‘core-updates’.
Then there are optimizations to work on, but that can take a bit longer.
In particular, in ‘gexp->derivation’, allow file-like objects to be
specified as environment variable values. In turn, use that so that,
say, ‘gnu-build-system’ has a single builder for all its packages and
just calls ‘getenv’ to get the value of its various parameters, similar
to what (guix git-download) does.
That said, if people think it’s too late in the cycle, we could just as
well keep it for the next cycle.
Thoughts?
Thanks,
Ludo’.