Re: [PATCH] commit-graph: fix buggy --expire-time option

[Derrick Stolee <stolee@gmail.com>]

On 4/1/2020 3:49 PM, Junio C Hamano wrote:
> "Derrick Stolee via GitGitGadget" <gitgitgadget@gmail.com> writes:
> 
>> diff --git a/t/t5324-split-commit-graph.sh b/t/t5324-split-commit-graph.sh
>> index 53b2e6b4555..4e4efcaff22 100755
>> --- a/t/t5324-split-commit-graph.sh
>> +++ b/t/t5324-split-commit-graph.sh
>> @@ -210,8 +210,10 @@ test_expect_success 'test merge stragety constants' '
>>  		git config core.commitGraph true &&
>>  		test_line_count = 2 $graphdir/commit-graph-chain &&
>>  		test_commit 15 &&
>> -		git commit-graph write --reachable --split --size-multiple=10 --expire-time=1980-01-01 &&
>> +		touch -m -t 201801010000.00 $graphdir/extra.graph &&
> 
> We have "test-tool chmtime" since 17e48368 (Add test-chmtime: a
> utility to change mtime on files, 2007-02-24) and refrained from
> using "touch -t" anywhere in our tests.  Can we use it here, too?

I will definitely do the more portable thing here.
 
> Especially with its "relative" form, can't we make the test to
> stay correct not just for 40 years but forever ;-)?

I should clarify: the test won't break in 40 years. It will
"fail to notice the bug" that was previously present. But the
relative form is likely to continue catching this bug.

Thanks,
-Stolee