Re: [RFC] Rebasing merges: a jorney to the ultimate solution(RoadClear)

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Jacob Keller <jacob.keller@xxxxxxxxx> writes:

> On Tue, Mar 27, 2018 at 10:57 PM, Sergey Organov <sorganov@xxxxxxxxx> wrote:
>>
>> Hi Johannes,
>>
>> Johannes Schindelin <Johannes.Schindelin@xxxxxx> writes:

[...]

> I'm pretty sure the fact has already been accepted, as he did indeed
> implement and develop a strategy for rebasing the merges (Phillip's
> strategy). He hasn't chosen to re-write all the code such that it was
> "always" this method, but rather kept it as an incremental patch on top as
> it makes it easier to review the changes since we've already spent time
> looking at and reviewing the --recreate-merges patches.

That's perfectly OK with me, except that he apparently still can't
accept the fact that rebasing a non-merge is not fundamentally different
from rebasing a merge.

"Rebase non-merge" is just a special case of generic "rebase commit",
provided we do have generic method that is capable to rebase any commit,
and we do have it, Phillip's or not.

> Having watched from the sidelines, I've been unable to completely
> understand and parse the strategies completely, but I've also found
> Phillip's method to be easier to understand.

It doesn't matter at all for this particular discussion. Let's call the
method "rebase a commit", a black-box, that is capable to rebase any
commit. I don't care what implementation is inside. Rebasing a commit is
still rebasing a commit, and it should not be called "merge" in the todo
list.

> As someone who's read the discussion on the sidelines, it certainly
> does feel like there is some misunderstanding on both sides. Neither
> of you have been able to get the other to see what you clearly both
> believe strongly.

Calling "rebase" operation "merge" is wrong no matter what method is
used to rebase a commit. Isn't it obvious? It's currently called "pick"
in the todo and it seems natural to continue to use that name for
picking a commit, whatever number of parents it happens to have.

> Unfortunately I do not have any suggestion as to how to resolve the
> misunderstanding.

This sub-thread is not about method at all, so no resolution on that
matter is required here. This sub-thread is about todo format only.

> Sergey's method appears to me to be more complex, and I agree that the
> extra steps could cause more merge conflicts, at least in how it was
> originally conceptualized and implemented. It is possible that we are
> mis-understanding the terminology for U1 and U2? It sure seems like it
> introduces more changes for merge conflicts than the strategy proposed by
> Phillip. However, the latest editions also sound a lot closer to Phillip's
> strategy in general, so maybe I have mis-understood how it works and what
> is fundamentally different about the two strategies.

There is nothing fundamentally different between them and thus I don't
care in this discussion what exact method is being used.

-- Sergey



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