Re: [gentoo-dev] moving kernel config checks forward: potential config checking tool

[Robin H. Johnson]

On Mon, Sep 27, 2021 at 11:47:38PM +0200, Michał Górny wrote:
> > Can we consider moving the checks for set A somewhere else, such that we
> > don't check the kernel config during package compile & install time, but
> > only check it later? This also meaningfully resolves that cases where
> > the system that has package building isn't where the packages are being
> > used.
> I'm not sure if I understand you correctly but if you mean not doing
> checks before compiling/installing, then I have to disagree.  There is
> value in knowing about this kind of problems early (hey, that's why we
> have pkg_pretend in the first place!)
Ebuilds should be able to call the tool (but it could be made optional
easily), which does the checks MORE efficiently than the present eclass
code. The ebuilds would be responsible for suitable warnings or failures
based on the tool's output.

E.g. maybe you're in a rescue environment and you know the tooling will
work fine on your final environment.

> There's certainly value in knowing 'I need to rebuild my kernel' early
> vs learning only after you've spent significant time waiting for some
> package to build.

One thing to this is if you're doing pkg_pretend for multiple packages
in a single emerge call, the tool could greatly amortize the cost of the
checks, as well as having them available after merge.

Great thought I had would be this tool could ALSO run on boot and warn
if some packages are unlikely to work

-- 
Robin Hugh Johnson
Gentoo Linux: Dev, Infra Lead, Foundation Treasurer
E-Mail   : robbat2@g.o
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