tools/setup-virtualenv: verify the `--python` param

when given an invalid or empty (PYTHON_BINARY)
fixup for 494fea50ced7

Fixes: https://tracker.ceph.com/issues/52304
Signed-off-by: Michael Fritch <mfritch@suse.com>
(cherry picked from commit c8d4c131adfe41739fd557091dc2931c1b7f15c5)

diff --git a/src/tools/setup-virtualenv.sh b/src/tools/setup-virtualenv.sh
index e9a1c6ddfbe4db774e95f8832b70f20b718937b1..34aee158a2302d3f595d749200a0d5126a008cc0 100755 (executable)
--- a/src/tools/setup-virtualenv.sh
+++ b/src/tools/setup-virtualenv.sh
@@ -50,6 +50,11 @@ while true ; do
     esac
 done
 
+if ! $PYTHON -VV; then
+    echo "$SCRIPTNAME: unable to locate a valid PYTHON_BINARY"
+    usage
+fi
+
 DIR=$1
 if [ -z "$DIR" ] ; then
     echo "$SCRIPTNAME: need a directory path, but none was provided"