Re: [GSoC 2011] Git Sequencer

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Hi Stephen,

Stephan Beyer writes:
> first, some notes on my git-sequencer 2008 branches that can be found at
> http://repo.or.cz/w/git/sbeyer.git ... (Not sure if I remember
> everything correctly)
> 
> I've settled to develop within the "seq-builtin-dev" branch and I
> sometimes merged Junio's "master" into that branch to catch up.
> The "seq-builtin-dev" branch is the important one.

Thanks! Jonathan told me about it earlier, and I've already started
ripping out code from the seq-builtin-dev branch :) I found your
't3350-sequencer.sh' especially interesting.

> Using git rebase -i (using git-sequencer) I sometimes remanaged the
> branch to "seq-builtin-rfc" that should represent a snapshot of a
> potential patch queue. My last rebase processes of the seq-builtin-rfc
> branch were pretty unmotivated and hence messy.
> 
> I have not touched the repo very often after GSOC'08 and I stopped
> touching it (as I stopped following recent Git development) "20 months
> ago" apparently. Quite many things may have changed since then.

Okay, got it.  I saw a few patches in 'master' that were based on your
work though.  Some of the patches in Christian's series also refer to
your work.

> The file A_SEQUENCER_TODO_FILE (added 2009-08-03) in the repo describes
> the missing and buggy pieces to fix so that _I_ (only me) would have
> been 100 per cent satisfied with that git-sequencer.
> http://repo.or.cz/w/git/sbeyer.git/blob/9e4b4d92f681a47e3d7ad2152d2391b2ab125a0c:/A_SEQUENCER_TODO_FILE
> [Some notes are also "strategy notes" to get things accepted, like the
> changes on "rebase -i -p" which are "not loved by everyone". ;-)]

Okay.

> On 2011-04-03, 22:50 +0530, Ramkumar Ramachandra wrote: 
> > * Is this a good change? Are there any forseeable issues?
> 
> I want to mention an issue that I have not foreseen before: merges.
> (You need merges, for example, when doing rebase -i -p ... -p as in
> --preserve-merges.)

Ah, that's not something I thought about immediately.

> When I began, there was code in the "next" branch that added the TODO
> instructions "mark", "reset" and "merge" to do merges properly and I
> based my work on it. The original pieces by Jörg Sommer can still be
> found here:
> http://repo.or.cz/w/git/sbeyer.git/shortlog/6fabd85e8a777c26f3ae8ce11cb7f4265502ea7f
> 
> However, there have been strong opinions that the "mark"/"reset"/"merge"
> instructions are ugly and unpleasant to users and not even necessary (at
> least for rebase--interactive... and for sequencer, maybe, maybe not). 
> Hence, the code in "next" has been rejected later.

Interesting historical note.

> During GSOC 2008 I regrettably underestimated the importance to
> communicate with the Git folks about these things. That's one of the
> main reasons the sequencer pieces did not get into master. And after
> GSOC'08 I had too little time for this... :-/
> 
> Well, the merging thing is the only *real* issue I remember.

Point noted.  Yes, I noticed that your sequencer was mostly
functionally complete.  I'll make sure that I spend a lot of
interacting with the community.

Thank you for your elaborate note! I really appreciate it :)
Hopefully, we will have that sequencer by next year.

-- Ram
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