debootstrap and --allow-unauthenticated on Ubuntu 14.04 fails

[bdellegrazie]

Hi,

When using Ubuntu 14.04 LTS as the host, debootstrap doesn't support the --allow-unauthenticated option (looks like that's available in later versions).

the create stage results in:
Exec[create_pbuilder_trusty]/returns: E: unrecognized or invalid option --allow-unauthenticated

this is a direct result of the DEBOOTSTRAPOPTS[3]="--allow-unauthenticated" at the end of the pbuilderrc.erb template.

Unfortunately there is no way to override either the option or the template due as its the last file in the configuration processing order (according to pbuilder documentation)

Can I suggest an improvement in the following way:
Change DEBOOTSTRAPOPTS[0..3] to be something like:
DEBOOTSTRAPOPTS=("${DEBOOTSTRAPOPTS[@]}" "--variant=buildd" "--arch=$ARCH")

This way --allow-unauthenticated can be supplied from /etc/pbuilderrc

Alternatively provide a mechanism for replacing the template.

I'm happy to produce a pull request for this - in fact, I may do this anyway.