Hi Junio,
On 2015-06-19 22:32, Junio C Hamano wrote:
> Johannes Schindelin <johannes.schindelin@xxxxxx> writes:
>
>> This option avoids unpacking each and all objects, and just verifies the
>> connectivity.
>
> That sounds like marketing ;-)
>
> "Wow this does not unpack unnecessarily, wait, it needs to unpack
> and parse 3 out of 4 kinds of objects?"
Hah, you caught me there. I wanted to say "blob objects".
> Jokes aside, given that you should regularly repack your repository
> anyway, I do not think it is such a big downside that this mode
> misses a corrupt objects, and the 1 out of 4 kinds of objects,
> i.e. blobs, occupy major part of the repository storage, so this new
> mode probably makes sense.
It actually makes a ton of sense as a kind of light-weight check ;-) Try it, it is really much, much faster than a full fsck.
>> diff --git a/t/t1450-fsck.sh b/t/t1450-fsck.sh
>> index 922c346..2863a8a 100755
>> --- a/t/t1450-fsck.sh
>> +++ b/t/t1450-fsck.sh
>> @@ -431,4 +431,26 @@ test_expect_success 'fsck notices ref pointing to missing tag' '
>> test_must_fail git -C missing fsck
>> '
>>
>> +test_expect_success 'fsck --quick' '
>> + rm -rf quick &&
>> + git init quick &&
>> + (
>> + cd quick &&
>> + touch empty &&
>> + git add empty &&
>> + test_commit empty &&
>> + empty=.git/objects/e6/9de29bb2d1d6434b8b29ae775ad8c2e48c5391 &&
>> + rm -f $empty &&
>> + echo invalid >$empty &&
>> + test_must_fail git fsck --strict &&
>> + git fsck --strict --quick &&
>> + tree=$(git rev-parse HEAD:) &&
>> + suffix=${tree#??} &&
>> + tree=.git/objects/${tree%$suffix}/$suffix &&
>> + rm -f $tree &&
>> + echo invalid >$tree &&
>> + test_must_fail git fsck --strict --quick
>> + )
>> +'
>> +
>> test_done
>
> I see a few impedance mismatch here. For --quick, I would have
> expected that the addition would be in t/perf/, not here.
>
> Also the fact that quickness comes by cheating on blobs is an
> implementation detail; in the future, perhaps somebody may come up
> with a way to do a quick fsck while making sure blob corruption is
> also detected. The new test that expects "--quick" to ignore a
> corrupt blob forbids such a progress.
>
> If the option name was "--ignore-corrupt-blob", then the above
> change is 100% justified, though.
The meaning of "quick" that I was thinking of was not the same as "fast", but more like "just a quick check". As in "quick & dirty" ;-)
The point is not to ignore corrupt blobs, by the way, it is to check the connectivity only, and save substantial amounts of time doing so.
Can you think of a name for the option that is as short as `--quick` but means the same as `--connectivity-only`?
Ciao,
Dscho
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