On Wed, Jul 23, 2014 at 9:13 AM, Richard Harding <rick.hard...@canonical.com> wrote: > This is driven by requirements from ecosystem and users where bundles > define a 'solution'. A mongodb-cluster bundle doesn't need to be updated > every time a new revision comes out, or even if a new series comes out. It > is a usable solution regardless. Bundles can be as specific as they wish to > be, however requiring them to define charms specifically reduces their > reusability and causes us to be less flexible.
When you design a system there's always a tension between what people need and what they think they need. Speaking of a different area close to our hearts, programming languages such as Perl evolved with the author hearing user requests.. developers, even fairly experienced ones, tend to want to pack as much power on as few key strokes as possible, and a language that has a very high rate of meaning per key stroke is often deemed as an expressive and powerful programming language. That feeling presumes that there is a high cost in typing a bit more, but as time passes we're learning that the semantic load has a more relevant cost on itself, and simpler but consistent primitives often yield better results. Going back to bundles, not having to update a bundle when a new, entirely different, release of Ubuntu comes out, is of course much more expressive, and people love expression, but carries with it a relevant semantic load. It also means neither we nor anybody else has any idea about what people actually get when they deploy a bundle, and whether the bundle will even work tomorrow once a new major upgrade is pushed to the repository. Our focus should not be to encourage that, but to help people express what they mean clearly and easily. If they want a new release of the bundle with a slightly different meaning, that should be trivial, but it should not be trivial to express lack of clarity. > We also have to worry about historical usage as we've always supported the > vague behaviour and many of the current of bundles take advantage of it. Yes, bundles were very organically developed. But I won't re-raise that rant. gustavo @ http://niemeyer.net -- Juju-dev mailing list Juju-dev@lists.ubuntu.com Modify settings or unsubscribe at: https://lists.ubuntu.com/mailman/listinfo/juju-dev
