formula exec env should include DEBIAN_FRONTEND=noninteractive

[Mark Mims]

default formula execution environment should include

    DEBIAN_FRONTEND=noninteractive

[Jamu Kakar (jkakar)]

We've been using 'DEBIAN_FRONTEND=noninteractive' in some of our
deployment scripts (Fabric-based) and have had issues when
configuration files change and the package asks if you want to use the
new one, the old one, look at the diff, etc. We've been using this,
which seems to be better:

DEBIAN_FRONTEND=noninteractive apt-get -o Dpkg::Options::='--force-confnew'

[Gustavo Niemeyer (niemeyer)]

For reference, this is from Smart (used in Landscape):

            os.environ[DEBIAN_FRONTEND] = "noninteractive"
            os.environ[APT_LISTCHANGES_FRONTEND] = "none"
            baseargs.append("--force-confold")

[Kapil Thangavelu (hazmat)]

in this case juju isn't actually executing apt-get...

options that i see are.

1. rely on env changes for hook execution.
2. globally change apt config on the machine.
3. alias the cli to a version with the appros cli args.

we should definitely go ahead and do 1.

[Clint Byrum (clint-fewbar)]

Fixed in r399, precise has r424

[Rolf Leggewie (r0lf)]

oneiric has seen the end of its life and is no longer receiving any updates. Marking the oneiric task for this ticket as "Won't Fix".