Fix the detection of rpm vs deb systems.

[arvados.git] / build / go-python-package-scripts / prerm

diff --git a/build/go-python-package-scripts/prerm b/build/go-python-package-scripts/prerm
index d840ee1bd16cbf272a7807a2b0b36310cbb466ba..b2908e2f31e7f1480674de7693e8bd4d03bf9f83 100755 (executable)
--- a/build/go-python-package-scripts/prerm
+++ b/build/go-python-package-scripts/prerm
@@ -3,9 +3,11 @@
 #
 # SPDX-License-Identifier: AGPL-3.0
 
-set -e
+# Detect rpm-based systems: the exit code of the following command is zero
+# on rpm-based systems
+/usr/bin/rpm -q -f /usr/bin/rpm >/dev/null 2>&1
 
-if [ "%{name}" != "%\{name\}" ]; then
+if [ "$?" = "0" ]; then
     # Red Hat ("%{...}" is interpolated at package build time)
     pkg="%{name}"
     pkgtype=rpm
@@ -18,6 +20,7 @@ else
     prefix=/usr
 fi
 
+set -e
 case "${pkgtype}-${1}" in
     deb-remove | rpm-0)
         if [ -e /run/systemd/system ]; then