Re: [gentoo-dev] GLEP 54 and hyphens in PV

[Piotr Jaroszyński]

2009/5/28 Ulrich Mueller <ulm@g.o>:
>>>>>> On Thu, 28 May 2009, Tiziano Müller wrote:
>
>>> ${PORTDIR}/app-misc/foo/foo-1a_live.ebuild
>>> ${PORTDIR}/app-misc/foo-1a/foo-1a-live.ebuild
>
>> you probably mean:
>> ${PORTDIR}/app-misc/foo-1a/foo-1a.live.ebuild
>
> No, I mean what I had written, namely to use an underscore as
> separator, i.e., "_live". But when the version is just "live" alone,
> one would suppress the underscore for aesthetic reasons, i.e. instead
> of "foo-1a-_live" it would be "foo-1a-live".
>
>> but how would their vdb or binpkg names be unique?
>
>> vdb for example:
>> app-misc/foo-1a_live for app-misc/foo
>
> PN=foo, PV=1a_live => app-misc/foo-1a_live
>
>> app-misc/foo-1a_live for app-misc/foo-1a
>
> PN=foo-1a, PV=live => app-misc/foo-1a-live
>
>> am I missing something?
>
> Everything is easy, if you keep the following rule in mind:
>
>>> With our current versioning scheme the rule is very simple: ${P} is
>>> split into ${PN} and ${PV} at the last hyphen. This can be done in
>>> a straight forward way by regexp matching, and I would really hate
>>> to lose this nice property.
>
>> I don't understand why this property is important. Can you please
>> explain?
>
> See above, it automatically avoids any ambiguities in splitting P into
> PN and PV. And look at function "pkgsplit" in Portage: It can just
> treat PV as an opaque string.
>
> What would be the advantage to use a hyphen instead of an underscore?

Mainly the thing you observed yourself - foo_live is a bit
inconsistent with current versions.

The case you mention can be avoided with another restriction in PMS.
Buut we might as well go all the way and change the version separator
to -- or something, which would be the most flexible.

-- 
Best Regards,
Piotr Jaroszyński