Re: Use case I don't know how to address

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Alan Chandler wrote:
Alan Chandler wrote:
Junio C Hamano wrote:
Alan Chandler <alan@xxxxxxxxxxxxxxxxxxxxx> writes:

       2' - 2a - 3' - 4' ----------------- 6' SITE
      /         /    /                    /
1 -  2  ------ 3  - 4  ------------6'''- 6a TEST
                     \            /
                       5  ------ 6  MASTER
                        \         \
                          5''- 5a- 6'' DEMO


What will happen is the changes made in 4->5 will get applied to the
(now) Test branch as part of the 6->6'' merge, and I will be left
having to add a new commit, 6a, to undo them all again.  Given this is
likely to be quite a substantial change I want to try and avoid it if
possible.

I presume 6'''-6a has the revert of 4-5?  If so, the next merge should
work just fine.


I think you missed the issue - Yes 6'''-6a is the revert, but the problem is this could be large and complicated, and I wanted to find an automated way rather than manual

Sort of like doing a diff of 4-5 and somehow applying it backwards.



I just discovered that git-apply has the -R flag. Is that what I am looking for?


        2' - 2a - 3' - 4' ------------ 6' SITE
       /         /    /               /
 1 -  2  ------ 3  - 4  --5'''--5b---6''' TEST
                      \  /          /
                        5  ------ 6  MASTER
                         \         \
                          5''- 5a- 6'' DEMO


Just to be clear - if I do a diff of 4->5 and then immediately merge it back to 4 as 5'' (which fast forwards 4) and then 5b is the diff of 4-5 applied with git apply -R.

Is that what the -R flag does on git apply?

--
Alan Chandler
http://www.chandlerfamily.org.uk

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