virtual/wine: Virtual for multislot/split wine.

Thanks to eroen for his help with laying the groundwork.

Thanks to bobwya, chiitoo, eroen, sarnex, slackner, and wizardedit
for their feedback and testing.

Imported from wine-a-holics overlay

Package-Manager: Portage-2.3.3, Repoman-2.3.1

virtual/wine/metadata.xml

@@ -0,0 +1,16 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<!DOCTYPE pkgmetadata SYSTEM "http://www.gentoo.org/dtd/metadata.dtd">
+<pkgmetadata>
+	<maintainer type="project">
+		<email>wine@gentoo.org</email>
+		<name>Wine</name>
+	</maintainer>
+	<use>
+		<flag name="d3d9">Enable Ixit's Gallium Nine Patchset</flag>
+		<flag name="staging">Enable Wine-Staging's Patchset</flag>
+	</use>
+	<longdescription lang="en">
+		Allows for any variant of WINE, regardless of slotting to fulfill the dependencies
+		traditionally fulfilled by the non-slotted, pre-variant, app-emulation/wine.
+	</longdescription>
+</pkgmetadata>

virtual/wine/wine-0-r4.ebuild

@@ -0,0 +1,31 @@
+# Copyright 1999-2017 Gentoo Foundation
+# Distributed under the terms of the GNU General Public License v2
+
+EAPI=6
+
+DESCRIPTION="Virtual for WINE that supports multiple variants and slotting"
+
+SLOT="0"
+KEYWORDS="~amd64 ~x86"
+IUSE="staging d3d9"
+
+# Note, the ordering here is intentional, to take advantage of the short-circuit
+# logic of portage, to enforce wine-vanilla as default for new users.  The idea
+# behind this is that some USE flags may pull in 3rd-party patchsets, so default
+# of vanilla prevents that.
+RDEPEND="
+	staging? ( || (
+		app-emulation/wine-staging[staging]
+		app-emulation/wine-any[staging]
+	) )
+	d3d9? ( || (
+		app-emulation/wine-d3d9[d3d9]
+		app-emulation/wine-any[d3d9]
+	) )
+	|| (
+		app-emulation/wine-vanilla
+		app-emulation/wine-staging
+		app-emulation/wine-d3d9
+		app-emulation/wine-any
+	)
+	!app-emulation/wine:0"