purge-packages: Allow CALL_GC to be determined by environment

diff --git a/purge-packages.sh b/purge-packages.sh
index 4b415c11163fa2159085d7af374b32ca61258d6f..90ac6665f03572635d15295e2e8b1a938bc82a52 100755 (executable)
--- a/purge-packages.sh
+++ b/purge-packages.sh
@@ -4,7 +4,7 @@
 # - otherwise git gc is called
 set -e
 
-CALL_GC='yes'
+CALL_GC=${CALL_GC:-'yes'}
 
 topdir=$(rpm -E %_topdir)
 purgedir=$topdir/purged