Use lua for pre scriptlets to reduce dependencies

Fixes https://bugzilla.redhat.com/show_bug.cgi?id=2034336

authselect.spec

@@ -3,7 +3,7 @@
 
 Name:           authselect
 Version:        1.3.0
-Release:        3%{?dist}
+Release:        4%{?dist}
 Summary:        Configures authentication and identity sources from supported profiles
 URL:            https://github.com/authselect/authselect
 
@@ -275,28 +275,42 @@ if [ $1 == 0 ] ; then
     %{_bindir}/authselect uninstall
 fi
 
-%pre libs
 %if %{enforce_authselect}
-# Check if this is a new installation.
-%__rm -f %{forcefile}
-if [ $1 -eq 1 ] ; then
-    touch %{forcefile}
-fi
+%pre libs -p <lua>
+force_file = rpm.expand("%{forcefile}")
+authselect = rpm.expand("%{_bindir}/authselect")
+os.remove(force_file)
 
-# Check if we are upgrading from older version then authselect-1.3.0
-# The version command is not available on earlier versions
-if [ $1 -gt 1 ] ; then
-    %{_bindir}/authselect check &> /dev/null
-    if [ $? -ne 0 ]; then
-        %{_bindir}/authselect version &> /dev/null
-        if [ $? -ne 0 ]; then
-            touch %{forcefile}
-        fi
-    fi
-fi
+-- Check if this is a new installation.
+if tonumber(arg[2]) == 1
+then
+  f = rpm.open(force_file, "w")
+  f:write("")
+  f:close()
+end
+
+-- Check if we are upgrading from older version then authselect-1.3.0
+-- The version command is not available on earlier versions
+if tonumber(arg[2]) > 1
+then
+  comm = os.execute(authselect .. " check &> /dev/null")
+  if comm ~= true
+  then
+    comm = os.execute(authselect .. " version &> /dev/null")
+    if comm ~= true
+    then
+      f = rpm.open(force_file, "w")
+      f:write("")
+      f:close()
+    end
+  end
+end
+
+%else
+%pre libs
+exit 0
 %endif
 
-exit 0
 
 %posttrans libs
 # Copy nsswitch.conf to user-nsswitch.conf if it was not yet created
@@ -333,6 +347,9 @@ fi
 exit 0
 
 %changelog
+* Tue Dec 21 2021 Frantisek Zatloukal <fzatlouk@redhat.com> - 1.3.0-4
+- Use lua for pre scriptlets to reduce dependencies
+
 * Fri Dec 10 2021 Pavel Březina <pbrezina@redhat.com> - 1.3.0-3
 - Update conflicting versions of glibc and pam