Re: [PATCH OSSTEST v2] Arrange to test migration from the previous Xen version

[Ian Campbell <ian.campbell@citrix.com>]

On Fri, 2015-07-24 at 17:28 +0100, Ian Campbell wrote:
> @@ -191,6 +208,27 @@ create_build_jobs () {
>                  revision_ovmf=$REVISION_OVMF
>      done
>  
> +    if [ x$want_prevxen = xy ] ; then
> +        if [ "x$REVISION_PREVXEN" = x ] ; then
> +            echo >&2 "prevxen ?"; exit 1
> +        fi

This breaks things with standalone mode, or any make-flight which didn't
come from cr-daily-branch.

In such cases we don't have REVISION_XEN or TREE_XEN either, we just get
the defaults.

I think we need to do something like select_prevxenbranch but to pick a
xen.git branch name rather than an osstest branch name.

Or we quietly skip this test if REVISION_PREVXEN is not set.

One to chew on I think.

Ian.