Re: [PATCH 1/1] contrib: add coverage-diff script

[Junio C Hamano <gitster@pobox.com>]

Derrick Stolee <stolee@gmail.com> writes:

> On 9/12/2018 6:54 PM, Junio C Hamano wrote:
>> Junio C Hamano <gitster@pobox.com> writes:
>>
>>> "Derrick Stolee via GitGitGadget" <gitgitgadget@gmail.com> writes:
>>>
>>>>   contrib/coverage-diff.sh | 70 ++++++++++++++++++++++++++++++++++++++++
>>>>   1 file changed, 70 insertions(+)
>>>>   create mode 100755 contrib/coverage-diff.sh
>>> I fully appreciate the motivation.  But it is a bit sad that this
>>> begins with "#!/bin/bash" but it seems that the script is full of
>>> bash-isms.  I haven't gone through the script to see if these are
>>> inevitable or gratuitous yet, but I'd assume it made it easier for
>>> you to write it to step outside the pure POSIX shell?
>
> I completely forgot to avoid bash, as I wrote this first as an experiment.
>
>>> ...
>>>> +	elif [[ $REPLY =~ \+\+\+\ (b/)?([^[:blank:]$esc]+).* ]]; then
>>>> +	    path=${BASH_REMATCH[2]}
>>> OK, it probably is easier to write in bash than using expr if you
>>> want to do regexp.
>> Just to clarify. I am saying that it is OK to give up writing in
>> pure POSIX and relying on bash-isms after seeing these lines.
>
> I'll try rewriting it using POSIX shell and see how hard it is.

Thanks.  Don't waste too much time on it and try to bend backwards
too far, though.