Hi Steve,

On Wed, 26 Apr 2017, Steve Hicks wrote:

> On Wed, Apr 26, 2017 at 12:17 PM, Johannes Schindelin
> <johannes.schinde...@gmx.de> wrote:
> > From: Stephen Hicks <s...@google.com>
> >
> > In the scripted version of the interactive rebase, there was no
> > internal representation of the todo list; it was re-read before every
> > command.  That allowed the hack that an `exec` command could append
> > (or even completely rewrite) the todo list.
> >
> > This hack was broken by the partial conversion of the interactive
> > rebase to C, and this patch reinstates it.
> >
> > We also add a small test to verify that this fix does not regress in
> > the future.
> 
> For context on this "hack", I have a script [1] that allows passing
> multiple branches at once (or all branches beneath a given root).  It
> rewrites the todo file with some extra operations, like "branch",
> "push", and "pop", allows editing the modified todo, and then rewrites
> back to exec's.

For what it's worth, I used a slightly different approach in the Git
garden shears [*1*] (essentially, `git rebase -i -p` Done Right): I
override the GIT_SEQUENCE_EDITOR to call the script in a specific mode
that rewrites the todo and then launches the editor as per `git var
GIT_EDITOR`.

Ciao,
Johannes

Footnote *1*:
https://github.com/git-for-windows/build-extra/blob/master/shears.sh

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