Re: [PATCH 2/4] read-cache: add index.skipHash config option

[Derrick Stolee <derrickstolee@github.com>]

On 12/7/2022 1:59 PM, Eric Sunshine wrote:
> On Wed, Dec 7, 2022 at 12:27 PM Derrick Stolee via GitGitGadget
> <gitgitgadget@gmail.com> wrote:
>> +If you enable `index.skipHash`, then older Git clients may report that
>> +your index is corrupt during `git fsck`.
> 
> This documentation is rather minimal. Given this description, are
> readers going to understand the purpose of the option, when they
> should use it, what the impact will be, when and why they should avoid
> it, etc.?

I will expand this with explicit version numbers for older Git versions.

>> diff --git a/t/t1600-index.sh b/t/t1600-index.sh
>> @@ -65,6 +65,14 @@ test_expect_success 'out of bounds index.version issues warning' '
>> +test_expect_success 'index.skipHash config option' '
>> +       (
>> +               rm -f .git/index &&
>> +               git -c index.skipHash=true add a &&
>> +               git fsck
>> +       )
>> +'
> 
> What is the purpose of the subshell here?

I was matching the style of the nearby tests, but they are all
modifying GIT_INDEX_VERSION, which isn't necessary here.

Thanks,
-Stolee