ensure that the pg_superuser.conf is now always present by creating it on upgrades, too

postgresql/postgresql.spec

@@ -637,15 +637,15 @@ AutoReqProv:  no
 
 %post
 %if "%{with_server}" == "yes"
-    if [ $1 -eq 1 ]; then
-        #   create initial database
 %if "%{with_compat}" == "yes"
-        l_pguser="postgres"
-        l_pgpass="postgres"
+    l_pguser="postgres"
+    l_pgpass="postgres"
 %else
-        l_pguser="postgresql"
-        l_pgpass="postgresql"
+    l_pguser="postgresql"
+    l_pgpass="postgresql"
 %endif
+    if [ $1 -eq 1 ]; then
+        #   create initial database
         su - %{l_rusr} -c \
             "LC_CTYPE=C; export LC_CTYPE; umask 077; \
             rm -rf $RPM_INSTALL_PREFIX/var/postgresql/db/*; \
@@ -719,6 +719,27 @@ AutoReqProv:  no
         #   after upgrade, restore status
         { eval `cat %{l_tmpfile}`; rm -f %{l_tmpfile}; true; } >/dev/null 2>&1
         [ ".$postgresql_active" = .yes ] && %{l_rc} postgresql start
+        if [   -f $RPM_INSTALL_PREFIX/var/postgresql/db/PG_VERSION -a \
+             ! -f $RPM_INSTALL_PREFIX/var/postgresql/db/pg_superuser.conf ]; then
+            ( umask 077
+              ( echo "##"
+                echo "##  pg_superuser.conf -- PostgreSQL database superuser configuration"
+                echo "##"
+                echo ""
+                echo "superuser_database=\"template1\""
+                echo "superuser_username=\"$l_pguser\""
+                echo "superuser_password=\"\""
+                echo ""
+              ) >$RPM_INSTALL_PREFIX/var/postgresql/db/pg_superuser.conf
+              chown %{l_rusr}:%{l_rgrp} $RPM_INSTALL_PREFIX/var/postgresql/db/pg_superuser.conf || exit $?
+              chmod 600 $RPM_INSTALL_PREFIX/var/postgresql/db/pg_superuser.conf || exit $?
+            ) || exit $?
+            ( echo "Created still missing \"pg_superuser.conf\" configuration file."
+              echo "You should update its content by resetting the PostgreSQL"
+              echo "superuser account password with the following command:"
+              echo "    \$ $RPM_INSTALL_PREFIX/bin/pg_passwd postgresql template1"
+            ) | %{l_rpmtool} msg -b -t warn
+        fi
         if [ -f $RPM_INSTALL_PREFIX/var/postgresql/db/PG_VERSION -a ".$PG_MIGRATE" != .ignore ]; then
             #   database migration restoring hint
             v_old_all=`cat $RPM_INSTALL_PREFIX/var/postgresql/db/PG_VERSION`