Define a "srcdir" in the spec file and use it in the URLs for the

source files so that they use the unchanging src or src-preview
subdirectory location for the file.

packaging/lsb/rsync.spec

@@ -3,9 +3,10 @@ Name: rsync
 Version: 3.0.1
 %define fullversion %{version}pre3
 Release: 0.1.pre3
+%define srcdir src-previews
 Group: Applications/Internet
-Source0: http://rsync.samba.org/ftp/rsync/rsync-%{fullversion}.tar.gz
-Source1: http://rsync.samba.org/ftp/rsync/rsync-patches-%{fullversion}.tar.gz
+Source0: http://rsync.samba.org/ftp/rsync/%{srcdir}/rsync-%{fullversion}.tar.gz
+Source1: http://rsync.samba.org/ftp/rsync/%{srcdir}/rsync-patches-%{fullversion}.tar.gz
 URL: http://rsync.samba.org/
 
 Prefix: %{_prefix}

packaging/release-rsync

@@ -151,7 +151,8 @@ $_ = <STDIN>;
 
 (my $finalversion = $version) =~ s/pre\d+//;
 my %specvars = ( 'Version:' => $finalversion, 'Release:' => $release,
-		 '%define fullversion' => "\%{version}$pre", 'Released' => "$version." );
+		 '%define fullversion' => "\%{version}$pre", 'Released' => "$version.",
+		 '%define srcdir' => $srcdir );
 my @tweak_files = ( glob('packaging/*.spec'), glob('packaging/*/*.spec'), glob('*.yo'),
 		    qw( configure.in rsync.h NEWS OLDNEWS options.c ) );