Re: Find the starting point of a local branch

> Nguyen Thai Ngoc Duy <pclouds@gmail.com> writes:
>
>> On Mon, Dec 24, 2012 at 12:34 PM, Tomas Carnecky
>> <tomas.carnecky@gmail.com> wrote:
>>>> Maybe we should store this information. reflog is a perfect place for
>>>> this, I think. If this information is reliably available, git rebase
>>>> can be told to "rebase my whole branch" instead of my choosing the
>>>> base commit for it.
>>>
>>> What's the starting point of the branch if I type: git branch foo <commit-ish>?
>>
>> You start working off <commit-ish> so I think the starting point would
>> be <commit-ish>.
>
> Yeah, that sounds sensible.  Don't we already have it in the reflog,
> though?

> What is trickier is when you later transplant it to some other base
> (perhaps prepare a topic on 'master', realize it should better apply
> to 'maint' and move it there).  If the user did the transplanting by
> hand, reflog would probably not have enough information, e.g. after
>
>     $ git checkout maint^0
>     $ git log --oneline master..topic
>     $ git cherry-pick $one_of_the_commit_names_you_see_in_the_above
>     $ git cherry-pick $another_commit_name_you_see_in_the_above
>       ...
>     $ git branch -f topic
>
> no reflog other than HEAD@{} will tell you that you were at maint^0,
> so the reflog of topic wouldn't know it "forked" from there, either.