kde5.eclass: Add KDE_SUBSLOT

eclass/kde5.eclass

@@ -113,6 +113,14 @@ fi
 # add a dependency on sec-policy/selinux-${KDE_SELINUX_MODULE} to (R)DEPEND.
 : ${KDE_SELINUX_MODULE:=none}
 
+# @ECLASS-VARIABLE: KDE_SUBSLOT
+# @DESCRIPTION:
+# If set to "false", do nothing.
+# If set to "true", add a subslot to the package, where subslot is either
+# defined as major.minor version for kde-*/ categories or ${PV} if other.
+# For any other value, that value will be used as subslot.
+: ${KDE_SUBSLOT:=false}
+
 # @ECLASS-VARIABLE: KDE_UNRELEASED
 # @INTERNAL
 # @DESCRIPTION
@@ -133,12 +141,31 @@ fi
 
 LICENSE="GPL-2"
 
+SLOT=5
+
 if [[ ${CATEGORY} = kde-frameworks ]]; then
-	SLOT=5/$(get_version_component_range 1-2)
-else
-	SLOT=5
+	KDE_SUBSLOT=true
 fi
 
+case ${KDE_SUBSLOT} in
+	false)  ;;
+	true)
+		case ${CATEGORY} in
+			kde-frameworks | \
+			kde-plasma | \
+			kde-apps)
+				SLOT+="/$(get_version_component_range 1-2)"
+				;;
+			*)
+				SLOT+="/${PV}"
+				;;
+		esac
+		;;
+	*)
+		SLOT+="/${KDE_SUBSLOT}"
+		;;
+esac
+
 case ${KDE_AUTODEPS} in
 	false)	;;
 	*)