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44478d99ee
If you were issuing emails for two branches, and one merged the other,
you would get the same log messages appearing in two separate emails.
e.g. A working repository, where the last push to central was done at
the revision marked "B", after which two branches were developed
further.
* -- B -- 1 -- 1 -- M (branch1)
\ /
2 -- 2 -- 2 (branch2)
Now imagine that branch2 is pushed to the email-generating repository;
an email containing all the "2" revisions would be sent. Now, let's say
branch1 is pushed, the old update hook would run
git-rev-list $newrev ^$baserev
Where $newrev would be "M" and $baserev would be "B". This list
includes all the "2" revisions as well as all the "1" revisions.
This patch addresses this problem by using
git-rev-parse --not --all | git-rev-list --stdin $newrev ^$baserev
To inhibit the display of all revisions that are already in the
repository.
Signed-off-by: Andy Parkins <andyparkins@gmail.com>
Signed-off-by: Junio C Hamano <junkio@cox.net>