Re: [gentoo-portage-dev] [PATCH] emerge: add --changed-deps-report option (bug 645780)

[Alec Warner]

On Sun, Jan 28, 2018 at 8:10 PM, Zac Medico <zmedico@g.o> wrote:

> On 01/28/2018 04:17 PM, Michael Orlitzky wrote:
> > Since ::gentoo is the only repository governed by the PMS, can't we make
> > repoman do this? The problem with requiring "repoman --force" for an
> > in-place dependency change is that repoman generally won't have access
> > to the unedited ebuild; but for ::gentoo, we can probably hack something
> > together in git. Have it source the old and new ebuilds, and compare
> > their dependency lists.
>
> Yes I'm in favor of that, but it doesn't accomplish my current goal, as
> I'll explain below.
>
> > It won't work outside of a git repo, but it will work in the one place
> > that really matters.
>
> My goal for this patch is to provide a safety net for users, such that
> they'll be automatically notified that the --changed-deps option is
> available when needed to solve problems involving stale dependencies.
> The reason behind this goal is that git commits flow directly to rsync
> without any restriction, which makes users vulnerable to stale
> dependencies, in the form of failed dependency calculations.
>

What I would go along with is:

1) If we can determine the depgraph failed and
2) We can determine that dependencies changed.
3) Show a NOTE telling users about --changed-deps=y

But I'm not sure the patch does this today? I think it will trigger too
aggressively. But ultimately I'm not against helping users work around this
sort of breakage.


> This goal is currently my highest priority, since I want to protect
> users from having difficulty with problems triggered by the new
> --dynamic-deps=n default [1].
>
> [1] https://bugs.gentoo.org/645550
> --
> Thanks,
> Zac
>
>