app-portage/grs: add USE=server to reduce dependencies

Package-Manager: Portage-2.3.13, Repoman-2.3.3

app-portage/grs/grs-9999.ebuild

@@ -1,7 +1,7 @@
 # Copyright 1999-2017 Gentoo Foundation
 # Distributed under the terms of the GNU General Public License v2
 
-EAPI="5"
+EAPI="6"
 PYTHON_COMPAT=( python3_{4,5,6} )
 
 inherit distutils-r1 linux-info
@@ -19,27 +19,31 @@ HOMEPAGE="https://dev.gentoo.org/~blueness/${PN}"
 
 LICENSE="GPL-2"
 SLOT="0"
-IUSE=""
+IUSE="server"
 
 DEPEND=""
 RDEPEND="
-	app-arch/tar[xattr]
-	app-crypt/md5deep
-	dev-libs/libcgroup
-	dev-vcs/git
-	net-misc/rsync
 	sys-apps/portage
-	sys-fs/squashfs-tools
-	virtual/cdrtools
-	|| (
-		sys-kernel/genkernel
-		sys-kernel/genkernel-next
+	server? (
+		app-arch/tar[xattr]
+		app-crypt/md5deep
+		dev-libs/libcgroup
+		dev-vcs/git
+		net-misc/rsync
+		sys-fs/squashfs-tools
+		virtual/cdrtools
+		|| (
+			sys-kernel/genkernel
+			sys-kernel/genkernel-next
+		)
 	)"
 
 pkg_setup() {
-	local CONFIG_CHECK="~CGROUPS"
-	local ERROR_CGROUPS="WARNING: grsrun requires CONFIG_CGROUPS enabled in the kernel."
-	linux-info_pkg_setup
+	if use server; then
+		local CONFIG_CHECK="~CGROUPS"
+		local ERROR_CGROUPS="WARNING: grsrun requires CONFIG_CGROUPS enabled in the kernel."
+		linux-info_pkg_setup
+	fi
 }
 
 src_install() {

app-portage/grs/metadata.xml

@@ -5,4 +5,7 @@
 		<email>blueness@gentoo.org</email>
 		<name>Anthony G. Basile</name>
 	</maintainer>
+	<use>
+		<flag name="server">Install all the tools building systems</flag>
+	</use>
 </pkgmetadata>