[gentoo-dev] [PATCH 2/3] virtual/cargo: drop virtual

[Michael Everitt]

On 26/10/19 23:35, William Hubbs wrote:
> On Sat, Oct 26, 2019 at 11:17:18AM +0200, Michał Górny wrote:
>> On Sat, 2019-10-26 at 11:14 +0200, Dirkjan Ochtman wrote:
>>> On Sat, Oct 26, 2019, 05:59 Kent Fredric <kentnl@g.o> wrote:
>>>
>>>> On Fri, 25 Oct 2019 15:03:39 -0700
>>>> Georgy Yakovlev <gyakovlev@g.o> wrote:
>>>>
>>>>> not used anymore
>>>>>
>>>>> Closes: https://bugs.gentoo.org/695698
>>>>> Signed-off-by: Georgy Yakovlev <gyakovlev@g.o>
>>>> Its likely this removal will cause the same kinds of problems faced by
>>>> the recent virtual/pam removal, just its more insidious, as the
>>>> dependency on the virtual is hidden away inside an eclass.
>>>>
>>>> But this still means that anything users have already installed will
>>>> still depend on this, and without --changed-deps=y, it will break
>>>> portage's resolution of anything currently installed using this crate.
>>>>
>>>> You can work-around this by -r1 bumping everything that used this
>>>> eclass .... but this just goes to show why there's policy against
>>>> eclasses changing the dependencies of their consumers without any
>>>> consumer involvement.
>>>>
>>> In most if not all cases, this is just a build-time dependency. Do we
>>> really have all these problems for build-time only dependencies?
>>>
>> Yes.  Because of --with-bdeps.
> I disagree, build-time dependencies can change in place because they
> only affect the build. The problem with virtual/pam was that it was a
> runtime dependency as well.
>
> William
The problem is that portage defaults to --with-bdeps=y, so any emerging of
packages now triggers anything that has a build-dep change, unless, as
previously stated, you exclude that case or change the defaults.