Johannes Schindelin 729b265c1a Add a builtin helper for interactive rebases ...

Git's interactive rebase is still implemented as a shell script, despite
its complexity. This implies that it suffers from the portability point
of view, from lack of expressibility, and of course also from
performance. The latter issue is particularly serious on Windows, where
we pay a hefty price for relying so much on POSIX.

Unfortunately, being such a huge shell script also means that we missed
the train when it would have been relatively easy to port it to C, and
instead piled feature upon feature onto that poor script that originally
never intended to be more than a slightly pimped cherry-pick in a loop.

To open the road toward better performance (in addition to all the other
benefits of C over shell scripts), let's just start *somewhere*.

The approach taken here is to add a builtin helper that at first intends
to take care of the parts of the interactive rebase that are most
affected by the performance penalties mentioned above.

Once that is in place, we can work gradually on tackling the rest of the
technical debt.

Signed-off-by: Johannes Schindelin <johannes.schindelin@gmx.de>

2016-08-31 16:04:31 +02:00

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