New feature for charmers - min-juju-version

[Nate Finch]

There is a new (optional) top level field in the metadata.yaml file called
min-juju-version. If supplied, this value specifies the minimum version of
a Juju server with which the charm is compatible. When a user attempts to
deploy a charm (whether from the charmstore or from local) that has
min-juju-version specified, if the targeted model's Juju version is lower
than that specified, then the user will be shown an error noting that the
charm requires a newer version of Juju (and told what version they need).
The format for min-juju-version is a string that follows the same scheme as
our release versions, so you can be as specific as you like. For example,
min-juju-version: "2.0.1-beta3" will deploy on 2.0.1 (release), but will
not deploy on 2.0.1-alpha1 (since alpha1 is older than beta3).

Note that, at this time, Juju 1.25.x does *not* recognize this flag, so it
will, unfortunately, not be respected by 1.25 environments.

This code just landed in master, so feel free to give it a spin.

-Nate
-------------- next part --------------
An HTML attachment was scrubbed...
URL: <https://lists.ubuntu.com/archives/juju/attachments/20160317/316417d4/attachment.html>