RFC: virtual/libudev
 

Hello, all.

Since nowadays udev is bundled within systemd, we start having two
libudev providers: >=sys-apps/systemd-185 and sys-fs/udev. Making
the long story short, I would like to introduce a virtual for libudev
which would pull in either of those two.

There are three USE flags used in conditionals when depending on udev:
- gudev - for glib wrapper on udev,
- hwdb - to pull in hwids,
- static-libs.

The former two were previously provided by 'extras' USE flag,
and the third was unconditional.

I'm attaching an example virtual/libudev which does the job. Sadly,
because of the 'extras' compatibility it's a big ugly conditional.

An alternative would be to provide separate virtual/libudev
and virtual/libgudev; and maybe changing ebuilds not to depend on
[hwids] but rather pull in sys-apps/hwids directly (since that's what
the flag does).

What are you thoughts?

--
Best regards,
Michał Górny
# Copyright 1999-2012 Gentoo Foundation
# Distributed under the terms of the GNU General Public License v2
# $Header: $

EAPI=4

DESCRIPTION="Virtual for libudev providers"
HOMEPAGE=""
SRC_URI=""

LICENSE=""
SLOT="0"
KEYWORDS="alpha amd64 arm hppa ia64 m68k ~mips ppc ppc64
s390 sh sparc x86 ~x86-linux"
IUSE="gudev hwdb static-libs"

RDEPEND="
gudev? (
hwdb? (
|| ( >=sys-fs/udev-171[gudev,hwdb,static-libs(+)?]
<sys-fs/udev-171[extras]
>=sys-apps/systemd-185[gudev,static-libs(+)?] )
)
!hwdb? (
|| ( >=sys-fs/udev-171[gudev,static-libs(+)?]
<sys-fs/udev-171[extras]
>=sys-apps/systemd-185[gudev,static-libs(+)?] )
)
)
!gudev? (
hwdb? (
|| ( >=sys-fs/udev-171[hwdb,static-libs(+)?]
<sys-fs/udev-171[extras]
>=sys-apps/systemd-185[static-libs(+)?] )
)
!hwdb? (
|| ( sys-fs/udev[static-libs(+)?]
>=sys-apps/systemd-185[static-libs(+)?] )
)
)"