cleanup: handle empty variable (ouch!)

This script was completely careless regarding the chance to meet an empty variable resulting in plain "rpm -qa" and subsequent attempt to, well, remove *all* packages. Thanks zerg@ for being persistent this time, even if he could probably find the culprit and send in this patch. :)

cleanup: handle empty variable (ouch!)
fa56731d · Michael Shigorin · 03bb07b4 · fa56731d
Commit fa56731d authored May 27, 2016 by Michael Shigorin
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90-cleanup-pkgs features.in/cleanup/live/image-scripts.d/90-cleanup-pkgs +1 -0

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--- a/features.in/cleanup/live/image-scripts.d/90-cleanup-pkgs
+++ b/features.in/cleanup/live/image-scripts.d/90-cleanup-pkgs
 #!/bin/sh -efu
 # remove extra packages from a bare livecd

+[ -n "$GLOBAL_CLEANUP_PACKAGES" ] || exit 0
 list="$(rpmquery -a --qf='%{NAME}\n' $GLOBAL_CLEANUP_PACKAGES)"
 [ -z "$list" ] || apt-get remove -f -y -- $list
 :