Re: [PATCH OSSTEST v3] mg-all-branch-statuses: Show how up to date each branch is

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

On Thu, 2015-07-02 at 17:30 +0100, Ian Jackson wrote:

> > +printf "%-28s %-8s %-8s %-9s %-10s %-10s\n" \
> > +	"Branch" "Basis" "Tip" "#Tip #Tot" "1stTip" "1stNew"
> > +
> > +for branch in $@; do
> > +    basis=`./ap-fetch-version-old $branch 2>/dev/null || true`
> > +    tip=`./ap-fetch-version $branch 2>/dev/null || true`
> 
> This is quite fault-oblivious, isn't it.  Oh well.

Yes, the problem is that for branches with no baseline:
$ ./ap-fetch-version-old linux-next ; echo $?
HEAD is now at 705bb44... fix
fatal: Couldn't find remote ref tested/linux-next
128
$

And for osstest (where the tip may not be available unless you are
osstest@osstest);
./ap-fetch-version osstest ; echo $?
HEAD is now at 705bb44... fix
fatal: Couldn't find remote ref pretest
fatal: The remote end hung up unexpectedly
128
$

In the latter case I print "Error!" (I could do it here instead of
later, I just noticed).

Not sure what to do about the former. In both cases this obviously
conflates actual failures with expected failures. I'm not sure how to
distinguish. Perhaps I could special case baselineless trees
(linux-next) in ap-fetch-version-old/ap-common and special case osstest
here as the only tree which might plausibly have an unavailable tip?

Ian.