Re: [PATCH v1] fsmonitor: update GIT_TEST_FSMONITOR support

From: Ben Peart <peartben@gmail.com>
Date: Sep 14, 2018, 13:09 UTC
Message-ID: <90c3d391-a10c-0fd5-4c76-96e547b8bd64@gmail.com>
In-Reply-To: <87h8itkz2h.fsf@evledraar.gmail.com>

On 9/13/2018 2:54 PM, Ævar Arnfjörð Bjarmason wrote:

Show 48 quoted lines

> 
> On Thu, Sep 13 2018, Ben Peart wrote:
> 
>> diff --git a/config.c b/config.c
>> index 3461993f0a..3555c63f28 100644
>> --- a/config.c
>> +++ b/config.c
>> @@ -2278,7 +2278,7 @@ int git_config_get_max_percent_split_change(void)
>>   int git_config_get_fsmonitor(void)
>>   {
>>   	if (git_config_get_pathname("core.fsmonitor", &core_fsmonitor))
>> -		core_fsmonitor = getenv("GIT_FSMONITOR_TEST");
>> +		core_fsmonitor = getenv("GIT_TEST_FSMONITOR");
>>
>>   	if (core_fsmonitor && !*core_fsmonitor)
>>   		core_fsmonitor = NULL;
>> diff --git a/t/README b/t/README
>> index 9028b47d92..545438c820 100644
>> --- a/t/README
>> +++ b/t/README
>> @@ -319,6 +319,10 @@ GIT_TEST_OE_DELTA_SIZE=<n> exercises the uncomon pack-objects code
>>   path where deltas larger than this limit require extra memory
>>   allocation for bookkeeping.
>>
>> +GIT_TEST_FSMONITOR=$PWD/t7519/fsmonitor-all exercises the fsmonitor
>> +code path for utilizing a file system monitor to speed up detecting
>> +new or changed files.
>> +
>>   Naming Tests
>>   ------------
> 
> I've seen this & will watch out for it, but still, when I'm updating to
> "next" in a couple of months I may not be tracking the exact state of
> the integration of this patch, and then running with
> GIT_FSMONITOR_TEST=... will suddenly be a noop.
> 
> So maybe something like this to test-lib.sh as well (or directly in
> config.c):
> 
>      if test -n "$GIT_FSMONITOR_TEST"
>      then
>          echo "The GIT_FSMONITOR_TEST variable has been renamed to GIT_TEST_FSMONITOR"
>          exit 1
>      fi
> 
> Maybe I'm being too nitpicky and there's only two of us who run the test
> with this anyway, and we can deal with it.
>

I agree that there are probably only 2 people in the world who ever used this but I'm happy to add the additional test to make it obvious it has been renamed.

Show 8 quoted lines

> It just rubs me the wrong way that we have a test mode that silently
> stops being picked up because a command-line option or env variable got
> renamed, especially since we've had it for 4 stable releases, especially
> since it's so easy for us to avoid that confusion (just die),
> v.s. potential time wasted downstream (wondering why fsmonitor stuff
> broke on $SOME_OS even though we're testing for it during package
> build...).
>