Re: [gentoo-dev] Re: Revisions for USE flag changes

[Jason Zaman]

On Sat, Aug 12, 2017 at 09:05:58PM +1000, Michael Palimaka wrote:
> On 08/12/2017 08:29 PM, Rich Freeman wrote:
> > On Sat, Aug 12, 2017 at 5:57 AM, Michael Orlitzky <mjo@g.o> wrote:
> >> On 08/12/2017 03:03 AM, Michał Górny wrote:
> >>>
> >>> Please provide some examples of recent in-place USE changes that benefit
> >>> from revbumps.
> >>>
> >>
> >> There is no single example. Things only get simpler if *all* USE changes
> >> come with a new revision.
> >>
> > This policy change would make my life easier, because for big packages
> > it would encourage maintainers to not make IUSE changes until they do
> > revbumps, which would save me a build.  I'm running on relatively old
> > hardware at this point so these rebuilds actually do cost me quite a
> > bit of time.  I'm not sure that not using --changed-use is a great
> > option though as it will make it that much harder to keep things
> > consistent when I do modify my package.use/make.conf.
> >
>
> At least now you have the option to run without --changed-use if you
> want. If inline IUSE changes are completely banned, you will definitely
> see more pointless rebuilds on your old hardware. In my experience most
> developers make a change when there's a change to be made, and don't
> "save up" changes until some arbitrary delta is reached. We've already
> an increase in revbumps like this in other areas where inline changes
> are being discouraged.

I'll give an example where revbumps are significantly inferior to
--changed-use.

The selinux useflag is hardmasked in all profiles except the selinux
ones and 99% of users do not run selinux. I regularly add "selinux ? (
sec-policy/selinux-foo )" to RDEPEND of packages.  With --changed-use,
only the people who need it (ie selinux users) will rebuild and everyone
is happy (selinux users because the program now works and non-selinux
users because they did not rebuild for no reason).  If i were to
randomly revbump packages whenever i needed to add selinux policy deps
to packages then i would make 99% of users upset for like no reason.

-- Jason