Re: [PATCH 4/6] t/t5528-push-default: generalize test_push_*

> On Mon, Jun 24, 2013 at 4:33 AM, Johan Herland <johan@herland.net> wrote:
>> On Mon, Jun 24, 2013 at 9:28 AM, Junio C Hamano <gitster@pobox.com> wrote:
>>> Johan Herland <johan@herland.net> writes:
>>>
>>>>> +       git --git-dir="${3:-repo1}" log -1 --format='%h %s' "$2" >actual &&
>>>>
>>>> Isn't  ${3:-repo1} a bashism?
>>>
>>> I do not think so.  But now I looked at it again, I think I would
>>> use ${3-repo1} form in this case myself.  No caller passes an empty
>>> string to the third place.
>>
>> Ok, I have to admit that I'm not at all sure where the line between sh
>> and bash goes when it comes to ${magic}... Is there any good
>> documentation on what is in sh and what is not?
>
> POSIX: http://pubs.opengroup.org/onlinepubs/9699919799/utilities/V3_chap02.html#tag_18_06_02