Charm derivation

[Gustavo Niemeyer]

> It might make sense to fold this work into charm-tools as a django
> helper. We've found that there are a lot of super-generic things that

There are dozens and dozens of frameworks out there that have their
place in the juju world. I'd rather not transform a single project
into a catch-all place for everybody to throw framework-specific logic
into, even because hopefully we may even have multiple people pushing
alternative libraries for the same framework. We don't have to
centralize that kind of development.

> need to be done in multiple charms, like download a file and verify its hash

Isn't that wget and sha1sum?

> or elect a leader of a peer relation.

That still has a place with juju itself, because it's hard to do
outside and very easy to get wrong.

-- 
Gustavo Niemeyer
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-- I'm not absolutely sure of anything.