epm play: Added snap support

prescription.d/snap.sh

+#!/bin/sh
+
+[ "$1" != "--run" ] && echo "Add snap support to system" && exit
+
+CONFINEMENT="$2"
+
+. $(dirname $0)/common.sh
+
+assure_root
+
+[ "$(epm print info -s)" = "alt" ] || fatal "Only ALTLinux are supported"
+
+epm install snapd
+
+if epm installed plasma5-discover ; then
+    epm install plasma5-discover-snap
+fi
+
+a= serv snapd on
+
+if [ "$CONFINEMENT" = "classic" ] ; then
+    # Симлинк нужен для работы класическиж snap пакетов
+    a= ln -s /var/lib/snapd/snap /snap
+fi
+
+echo "Snap successfully installed, but epm play is the preferred way to install the software."