Fix incorrect date and commit in Data Service

[zimoun <zimon.toutoune@gmail.com>]

Hi again,

On Tue, 17 Nov 2020 at 22:43, zimoun <zimon.toutoune@gmail.com> wrote:

> Well, the Data Service should filter out the messages only containing
> the header X-Git-Rev (commit hash) and use the date (Date) of the
> message, which is, IMHO, the most accurate way to do.  Instead of rely
> on the date of message containing such headers:
>
>         X-Git-Oldrev: 3b026eb3b1dd92c653d1a640b1280b96cfea3084
>         X-Git-Newrev: b5e51a06de08f446a07f678ff806cd71a355f7
>
> which can miss the correct commit introducing a change of derivation.

The file data-service/branch-updated-emails.scm contains:

         (x-git-newrev  (assq-ref headers 'x-git-newrev)))

which is the issue.  Instead, it should be

         (x-git-rev  (assq-ref headers 'x-git-rev)))

but maybe some filtering should be applied.

Well, to be continued…


All the best,
simon