+################################################################################
+
+def usage (exit_code=0):
+ print """Usage: jenna [OPTION]
+Write out file lists suitable for use with apt-ftparchive.
+
+ -a, --architecture=ARCH only write file lists for this architecture
+ -c, --component=COMPONENT only write file lists for this component
+ -s, --suite=SUITE only write file lists for this suite
+ -h, --help show this help and exit
+
+ARCH, COMPONENT and SUITE can be space seperated lists, e.g.
+ --architecture=\"m68k i386\""""
+ sys.exit(exit_code)
+
+################################################################################
+