epm-simulate: skip simulate if zypper does not have --dry-run

bin/epm-install

@@ -109,6 +109,7 @@ epm_ni_install_names()
 			sudocmd urpmi --auto $URPMOPTIONS $@
 			return ;;
 		zypper-rpm)
+			# FIXME: returns true ever no package found, need check for "no found", "Nothing to do."
 			yes | sudocmd zypper --non-interactive $ZYPPEROPTIONS install $@
 			return ;;
 		pkg_add)
@@ -141,6 +142,7 @@ epm_install_files()
     case $PMTYPE in
         apt-rpm)
             sudocmd rpm -Uvh $force $nodeps $@ && return
+            # TODO: check for "is already installed"
             # if run with --nodeps, do not fallback on hi level
             [ -n "$nodeps" ] && return
 

bin/epm-simulate

 #!/bin/sh
 #
-# Copyright (C) 2012  Etersoft
-# Copyright (C) 2012  Vitaly Lipatov <lav@etersoft.ru>
+# Copyright (C) 2012-2013  Etersoft
+# Copyright (C) 2012-2013  Vitaly Lipatov <lav@etersoft.ru>
 #
 # This program is free software: you can redistribute it and/or modify
 # it under the terms of the GNU Affero General Public License as published by
@@ -20,6 +20,12 @@
 load_helper epm-install
 load_helper epm-search
 
+# for zypper before SUSE/11.0
+__use_zypper_dry_run()
+{
+    a= zypper install --help 2>&1 | grep -q -- "--dry-run" && echo "--dry-run"
+}
+
 _epm_do_simulate()
 {
 	local CMD
@@ -38,7 +44,11 @@ _epm_do_simulate()
     		CMD="urpmi --test --auto"
     		;;
     	zypper-rpm)
-    		CMD="zypper --non-interactive install --dry-run"
+    		if ! __use_zypper_dry_run >/dev/null ; then
+    			echo "zypper is too old: does not support --dry-run"
+    			return
+    		fi
+    		CMD="zypper --non-interactive install"
     		;;
     	emerge)
     		echo "FIXME: Skip with emerge"