libspec.lib: use rpmspec -P <specfile> instead of rpm -q --specedit ... if rpm 4 is detected

conf/autospec.conf.in

@@ -23,6 +23,9 @@
 packager_fullname=
 packager_email=
 
+## Detect rpm version
+rpm_version="`rpm --version | sed 's|.* .* ||'`"
+
 ## Mode to be used when creating and updating the specfiles -------------------
 rpm_specfile_mode="644"
 

lib/libspec.lib.in

@@ -637,12 +637,21 @@ $FUNCNAME: specfile_preprocessed = \"$specfile_preprocessed\""
       notify.error "$FUNCNAME: "$"can't create temporary files"
    notify.debug "$FUNCNAME: tmpspreprerr = \`${NOTE}$tmpspreprerr${NORM}'"
 
-   notify.debug "\
+   if [ "${rpm_version:0:2}" == "5." ]; then
+      notify.debug "\
 $FUNCNAME: running: rpm -q $rpm_options --specfile --specedit $specfile ..."
 
-   eval "\
+      eval "\
 rpm -q $rpm_options --specfile --specedit $specfile \
-      > $specfile_preprocessed 2> $tmpspreprerr"
+         > $specfile_preprocessed 2> $tmpspreprerr"
+   else
+      notify.debug "\
+$FUNCNAME: running: rpmspec $rpm_options -P $specfile ..."
+
+      eval "\
+rpmspec $rpm_options -P $specfile \
+         > $specfile_preprocessed 2> $tmpspreprerr"
+   fi
 
    if [ -s "$tmpspreprerr" ]; then
       notify.warning $"\