Re: [PATCH 2/2] merge-base: "--reflog" mode finds fork point from reflog entries

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On Thu, Oct 24, 2013 at 5:26 PM, Junio C Hamano <gitster@xxxxxxxxx> wrote:
> Eric Sunshine <sunshine@xxxxxxxxxxxxxx> writes:
>
>> On Thu, Oct 24, 2013 at 3:11 PM, Junio C Hamano <gitster@xxxxxxxxx> wrote:
>>> diff --git a/t/t6010-merge-base.sh b/t/t6010-merge-base.sh
>>> index f80bba8..3a1abee 100755
>>> --- a/t/t6010-merge-base.sh
>>> +++ b/t/t6010-merge-base.sh
>>> @@ -230,4 +230,31 @@ test_expect_success 'criss-cross merge-base for octopus-step' '
>>>         test_cmp expected.sorted actual.sorted
>>>  '
>>>
>>> +test_expect_success 'using reflog to find the fork point' '
>>> +       git reset --hard &&
>>> +       git checkout -b base $E &&
>>> +       (
>>> +               for count in 1 2 3 4 5
>>> +               do
>>> +                       git commit --allow-empty -m "Base commit #$count" &&
>>> +                       git rev-parse HEAD >expect$count &&
>>> +                       git checkout -B derived &&
>>> +                       git commit --allow-empty -m "Derived #$count" &&
>>> +                       git rev-parse HEAD >derived$count &&
>>> +                       git checkout base &&
>>> +                       count=$(( $count + 1 )) || exit 1
>>> +               done
>>
>> Did you want && here?
>
> No, I did not.  Can't you tell from the fact that I didn't put one
> there ;-)?
>
> It does not hurt to have one there, but it is not necessary.
>
> Because the loop itself does not &&-cascade from anything else, the
> only case anything after "done &&" would be skipped and making the
> whole thing fail would be when anything inside the loop fails, but
> we already "exit 1" to terminate the whole subprocess in that case,
> so we will not continue past the loop.

I didn't read inside the loop closely enough to see that. Sorry for the noise.

>
>>> +
>>> +               for count in 1 2 3 4 5
>>> +               do
>>> +                       git merge-base --reflog base $(cat derived$count) >actual &&
>>> +                       test_cmp expect$count actual || exit 1
>>> +               done
>>
>> And here?
>
> Likewise.
>
> Thanks.
>
>>> +
>>> +               # check defaulting to HEAD
>>> +               git merge-base --reflog base >actual &&
>>> +               test_cmp expect5 actual
>>> +       )
>>> +'
>>> +
>>>  test_done
--
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