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

[Brian Evans]

On 08/11/2017 08:59 PM, Michael Orlitzky wrote:
> On 08/11/2017 08:45 PM, Brian Evans wrote:
>>
>> I disagree about removing --newuse and --changed-use from portage.
>> This is not their only use.
>>
>> If you happen to change the effective use system wide, USE= in make.conf
>> for portage, these options scan the entire system for such changes.
>>
>
> Does --changed-use help there? I can see the argument for --newuse, but
> I thought --changed-use only applied to flags that were added or removed
> to installed packages (which becomes impossible, if we require new
> revisions).
>

--changed-use (-U)
       Tells emerge to include installed packages where USE flags have
       changed   since  installation.  This  option  also  implies  the
       --selective option. Unlike --newuse,  the  --changed-use  option
       does not trigger reinstallation when flags that the user has not
       enabled are added or removed.

The option is the same as --newuse except it ignores functionality that
you suggest to remove.  You could certainly deprecate one option or the
other if they became the same.  But the core functionality of
system-wide USE changes (by profile or user), needs to be scanned somehow.

Brian