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

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

On Fri, 2015-07-24 at 14:55 +0100, Ian Jackson wrote:
> Ian Campbell writes ("[PATCH OSSTEST] Arrange to test migration from the 
> previous Xen version"):
> > There are several steps to this:
> 
> Thanks.  Much of this is very elegant.

Thank you, the building blocks are very flexible!

> > +select_prevxenbranch () {
> > +	local b
> > +	local p
> > +	for b in $(./mg-list-all-branches) ; do # already sorted by 
> > version
> > +		case "$b" in
> > +		xen*)
> 
> Maybe these patterns should be "xen-" ?  In case someone invents a
> tree `xenblargle'.
> 
> Hrm, I see you took the example of ap-print-url, cri-common and
> mfi-common.

Shall I get out my yakk scissors?

> > +        # XXX could find latest pass on that branch and attempt to 
> > reuse.
> > +        #bfiprevxen=...
> 
> There is some nascent stuff in my smoke branch which might help with
> this.  It's not suitable for public consumption.

I think we could do without it for now?

> > +        # To avoid the need for TREE_PREVQEMU, TREE_PREVOVMF etc we
> > +        # only pass tree_xen and revision_xen here and therefore
> > +        # pickup the versions implicitly selected by the
> > +        # $REVISION_PREVXEN.
> > +        #
> > +        # XXX I think this doesn't break bisecting over the old
> > +        # versions, since the bisectory will set tree_* based on what
> > +        # was actually built, not based on this set of vars.
> 
> You are correct.

Super. I shall s/XXX I think t/T/ in the next version. Or shall I drop the
paragraph?

I'll fix "bisectory" too

Ian.