+def usage (exit_code):
+ print """Usage: natalie.py [OPTIONS]
+ -D, --debug=VALUE debug
+ -h, --help this help
+ -V, --version retrieve version
+ -c, --component=CMPT list/set overrides by component
+ (contrib,*main,non-free)
+ -s, --suite=SUITE list/set overrides by suite
+ (experimental,stable,testing,*unstable)
+ -t, --type=TYPE list/set overrides by type
+ (*deb,dsc,udeb)
+ -S, --set set overrides from stdin
+ -l, --list list overrides on stdout
+
+ starred (*) values are default"""
+ sys.exit(exit_code)
+
+################################################################################
+
+def init ():