Re: [gentoo-user] Re: How to switch from rust to rust-bin?

[Wols Lists]

On 07/09/20 20:54, Grant Edwards wrote:
> On 2020-09-07, Andreas K  Hüttel <dilfridge@g.o> wrote:
>
>> That works, but pretty please try something else first!
>>
>> # make sure source-based rust is not in the world file
>> emerge --deselect dev-lang/rust
>>
>> emerge -1 dev-lang/rust-bin
>>
>> It should be as easy as that. *If* all dependencies are fulfilled by
>> both rust and rust-bin, then the second emerge call will unmerge
>> rust and merge rust- bin.
>
> It did not.  I executed the two commands shown above (the first
> reported that no such atom was found in the world file).  I ended up
> with both dev-lang/rust and dev-lang/rust-bin installed.

If rust is called in as a dependency, it won't be in the world file, so
the first command will have no effect ...
>
> When I subsequently ran "emerge --depclean --ask" it wanted to unmerge
> dev-lang/rust-bin.

rust-bin was emerged with the -1 option, ie "don't stick it in world" option
>
> I had to manually unmerge dev-lang/rust to get rid of it (which then
> prevented --depclean from trying to unmerge rust-bin).
>
So --depclean, relying on what is in world, notices that nothing has a
dependency on rust-bin and wants to remove it.
> --
> Grant
>
What you need to do (and this is a pain, but ...) is to add rust-bin to
the world file. There may be a --select option (opposite of deselect),
or I'd just manually add it to the world file.

At which point, anything with the virtual rust dependency will notice
that rust-bin is installed, and use that.

There's no way I know of to tell portage to use rust-bin rather than
rust to satisfy the virtual and, indeed, it makes sense for rust-bin
*not* to be the default.

Cheers,
Wol