epm-repack: add __epm_have_repack_rule()

bin/epm-repack

@@ -22,13 +22,20 @@ load_helper epm-assure
 
 [ -n "$EPM_REPACK_SCRIPTS_DIR" ] || EPM_REPACK_SCRIPTS_DIR="$CONFIGDIR/repack.d"
 
-
-__epm_check_if_needed_repack()
+__epm_have_repack_rule()
 {
+    # skip repacking on non ALT systems
+    [ "$BASEDISTRNAME" = "alt" ] || return 1
+
     # FIXME: use real way (for any archive)
     local pkgname="$(epm print name for package "$1")"
     local repackcode="$EPM_REPACK_SCRIPTS_DIR/$pkgname.sh"
-    [ -s "$repackcode" ] || return
+    [ -s "$repackcode" ]
+}
+
+__epm_check_if_needed_repack()
+{
+    __epm_have_repack_rule "$@" || return
     warning "There is repack rule for $pkgname package. It is better install this package via 'epm --repack install' or 'epm play'."
 }