Hi, On Mon, Aug 8, 2011 at 4:15 PM, Aaron Bentley <aa...@canonical.com> wrote: > While hacking on the local-latency script (which now has a configurable > - --port, by the way), I was unable to resist my compulsion to make it > simpler the next time I do this kind of thing.
Resistance is futile. > The result is utilities/script_commands.py, which makes it easy to turn > a function into a script, or script subcommand. > > Here's the definition of the "start" subcommand: > > @helps(delay='Length of delay in miliseconds (each way).', > port='Port to induce delay on.') > def start(delay=500, port=443): > """Add artificial latency to the lo interface on the specified port.""" > > As you can see, the only weird thing about the function is the "helps" > decorator that describes each parameter. And that's optional. The stop > command, which takes no parameters, is even simpler: > > def stop(): > > > You run such commands with script.commands.run_from_args. Each > parameter that has a default is converted into an option, and the type > of the parameter is determined from the default. (I haven't needed > positional parameters yet, so I haven't added support for them yet.) > > If your script needs subcommands, you stick them in a dict and call > script.commands.run_subcommand instead of run_from_args. > > So the next time you're writing a utility script, give script_commands a > try. It could save you time and drudgery. This sounds a lot like a library I wrote some time ago called Commandant. It's a wrapper around bzrlib that let's you easily write applications with a Bazaar-like user experience. It might be interesting if you want to go further and add topics, run shell scripts, etc.: lp:commandant Thanks, J. _______________________________________________ Mailing list: https://launchpad.net/~launchpad-dev Post to : launchpad-dev@lists.launchpad.net Unsubscribe : https://launchpad.net/~launchpad-dev More help : https://help.launchpad.net/ListHelp
