Re: [PATCH 5/6] t1500: avoid setting environment variables outside of tests

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Eric Sunshine <sunshine@xxxxxxxxxxxxxx> writes:

> On Tue, May 10, 2016 at 3:12 PM, Eric Sunshine <sunshine@xxxxxxxxxxxxxx> wrote:
>> On Tue, May 10, 2016 at 2:39 PM, Jeff King <peff@xxxxxxxx> wrote:
>>> On Tue, May 10, 2016 at 01:20:54AM -0400, Eric Sunshine wrote:
>>>>       while :
>>>>       do
>>>>               case "$1" in
>>>>               -C) dir="-C $2"; shift; shift ;;
>>>>               -b) bare="$2"; shift; shift ;;
>>>> +             -g) env="GIT_DIR=$2; export GIT_DIR"; shift; shift ;;
>>>> @@ -36,6 +38,8 @@ test_rev_parse () {
>>>>       do
>>>>               expect="$1"
>>>>               test_expect_success "$name: $o" '
>>>> +                     test_when_finished "sane_unset GIT_DIR" &&
>>>> +                     eval $env &&
>>>
>>> This will set up the sane_unset regardless of whether $env does
>>> anything. Would it make more sense to stick the test_when_finished
>>> inside $env? You could use regular unset then, too, since you know the
>>> variable would be set.
>>
>> I didn't worry about it too much because the end result is effectively
>> the same and, with all the 'case' arms being short one-liners, I think
>> the code is a bit easier to read as-is; bundling 'test_when_finished'
>> into the 'env' assignment line would probably require wrapping the
>> line. I do like the improved encapsulation of your suggestion but
>> don't otherwise feel strongly about it.
>
> Actually, I think we can have improved encapsulation and maintain
> readability like this:
>
>     case "$1" in
>     ...
>     -g) env="$2"; shift;  shift ;;
>     ...
>     esac
>
>     ...
>     test_expect_success "..." '
>         if test -n "$env"
>         do
>             test_when_finished "unset GIT_DIR"
>             GIT_DIR="$env"
>             export GIT_DIR
>         fi
>         ...
>     '

That's even better.  Thanks.
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