From: Michael J Gruber <git@drmicha•warpmail.net>
To: Jeff King <peff@peff•net>
Cc: git@vger•kernel.org, Junio C Hamano <gitster@pobox•com>
Subject: Re: [PATCHv2 4/6] t7510: exit for loop with test result
Date: Fri, 13 Jun 2014 14:22:36 +0200 [thread overview]
Message-ID: <539AED0C.8050107@drmicha.warpmail.net> (raw)
In-Reply-To: <539AE8CA.50009@drmicha.warpmail.net>
Michael J Gruber venit, vidit, dixit 13.06.2014 14:04:
> Jeff King venit, vidit, dixit 13.06.2014 13:46:
>> On Fri, Jun 13, 2014 at 12:42:46PM +0200, Michael J Gruber wrote:
>>
>>> When t7510 was introduced, the author made sure that a for loop in
>>> a subshell would return with the appropriate error code.
>>>
>>> Make sure this is true also the for the first line in each loop, which
>>> was missed.
>>>
>>> Signed-off-by: Michael J Gruber <git@drmicha•warpmail.net>
>>> ---
>>> t/t7510-signed-commit.sh | 4 ++--
>>> 1 file changed, 2 insertions(+), 2 deletions(-)
>>>
>>> diff --git a/t/t7510-signed-commit.sh b/t/t7510-signed-commit.sh
>>> index 5ddac1a..a5ba48e 100755
>>> --- a/t/t7510-signed-commit.sh
>>> +++ b/t/t7510-signed-commit.sh
>>> @@ -49,7 +49,7 @@ test_expect_success GPG 'show signatures' '
>>> (
>>> for commit in initial second merge fourth-signed fifth-signed sixth-signed master
>>> do
>>> - git show --pretty=short --show-signature $commit >actual &&
>>> + git show --pretty=short --show-signature $commit >actual || exit 1
>>> grep "Good signature from" actual || exit 1
>>
>> Hrm. The original is:
>>
>> X &&
>> Y || exit 1
>>
>> Won't that still exit (i.e., it is already correct)? Doing:
>>
>> for X in true false; do
>> for Y in true false; do
>> ($X && $Y || exit 1)
>> echo "$X/$Y: $?"
>> done
>> done
>>
>> yields:
>>
>> true/true: 0
>> true/false: 1
>> false/true: 1
>> false/false: 1
>>
>> (and should still short-circuit Y, because we go from left-to-right).
>>
>> I do not mind changing it to keep the style of each line consistent,
>> though. I would have written it as a series of "&&"-chains, with a
>> single exit at the end, but I think that is just a matter of preference.
>
> If I remember correctly, I put something failing on the first line of
> the original version, and the test succeeded. I think the point is that
> we have a for loop in a subshell, and we need to make sure that the
> false of one iteration is not overwritten by the true of the next one -
> "exit 1" makes sure to "break" the for loop and exit the subshell.
> (The chain should do that as well, I'll recheck.)
... the chain does not, which is the point :)
With X && Y || exit 1 inside the loop, the loop statement will return
false, but the loop will continue (if X returns false), which is exactly
the problem that the exit avoids.
Make your example iterate over false true instead in the inner loop and
you'll see ;)
Michael
next prev parent reply other threads:[~2014-06-13 12:22 UTC|newest]
Thread overview: 75+ messages / expand[flat|nested] mbox.gz Atom feed top
2014-06-06 14:15 [PATCH 0/3] verify-commit: verify commit signatures Michael J Gruber
2014-06-06 14:15 ` [PATCH 1/3] pretty: free the gpg status buf Michael J Gruber
2014-06-06 14:15 ` [PATCH 2/3] gpg-interface: provide access to the payload Michael J Gruber
2014-06-13 7:55 ` Jeff King
2014-06-13 9:44 ` Michael J Gruber
2014-06-13 10:34 ` Jeff King
2014-06-06 14:15 ` [PATCH 3/3] verify-commit: scriptable commit signature verification Michael J Gruber
2014-06-11 19:48 ` Michael J Gruber
2014-06-13 8:02 ` Jeff King
2014-06-13 9:55 ` Michael J Gruber
2014-06-13 11:09 ` Jeff King
2014-06-13 17:06 ` Junio C Hamano
2014-06-16 9:21 ` Michael J Gruber
2014-06-16 19:54 ` Jeff King
2014-06-16 20:34 ` Junio C Hamano
2014-06-16 20:39 ` Jeff King
2014-06-27 12:31 ` Michael J Gruber
2014-06-27 12:49 ` Michael J Gruber
2014-06-27 13:06 ` Michael J Gruber
2014-06-27 13:18 ` [PATCH] log: correctly identify mergetag signature verification status Michael J Gruber
2014-06-28 0:44 ` Jeff King
2014-07-10 22:27 ` Junio C Hamano
2014-06-27 13:50 ` [PATCH 3/3] verify-commit: scriptable commit signature verification Michael J Gruber
2014-06-27 18:55 ` Junio C Hamano
2014-06-27 18:36 ` Junio C Hamano
2014-06-28 0:32 ` Jeff King
2014-06-30 6:14 ` Junio C Hamano
2014-06-13 10:42 ` [PATCHv2 0/6] verify-commit: verify commit signatures Michael J Gruber
2014-06-13 10:42 ` [PATCHv2 1/6] pretty: free the gpg status buf Michael J Gruber
2014-06-13 11:39 ` Jeff King
2014-06-13 10:42 ` [PATCHv2 2/6] gpg-interface: provide access to the payload Michael J Gruber
2014-06-13 10:42 ` [PATCHv2 3/6] verify-commit: scriptable commit signature verification Michael J Gruber
2014-06-13 11:19 ` Jeff King
2014-06-13 11:45 ` Michael J Gruber
2014-06-13 11:50 ` Jeff King
2014-06-13 12:12 ` Michael J Gruber
2014-06-13 10:42 ` [PATCHv2 4/6] t7510: exit for loop with test result Michael J Gruber
2014-06-13 11:46 ` Jeff King
2014-06-13 12:04 ` Michael J Gruber
2014-06-13 12:22 ` Michael J Gruber [this message]
2014-06-13 12:33 ` Michael J Gruber
2014-06-13 12:45 ` Jeff King
2014-06-13 12:54 ` Johannes Sixt
2014-06-13 13:06 ` Michael J Gruber
2014-06-13 13:21 ` Johannes Sixt
2014-06-13 13:30 ` Jeff King
2014-06-13 13:31 ` Michael J Gruber
2014-06-13 13:42 ` Johannes Sixt
2014-06-13 18:23 ` Junio C Hamano
2014-06-13 10:42 ` [PATCHv2 5/6] t7510: test verify-commit Michael J Gruber
2014-06-13 11:51 ` Jeff King
2014-06-13 12:14 ` Michael J Gruber
2014-06-13 18:16 ` Junio C Hamano
2014-06-13 10:42 ` [PATCHv2 6/6] gpg-interface: provide clear helper for struct signature_check Michael J Gruber
2014-06-23 7:05 ` [PATCHv3 0/5] verify-commit: verify commit signatures Michael J Gruber
2014-06-23 7:05 ` [PATCHv3 1/5] gpg-interface: provide clear helper for struct signature_check Michael J Gruber
2014-06-23 7:05 ` [PATCHv3 2/5] gpg-interface: provide access to the payload Michael J Gruber
2014-06-23 7:05 ` [PATCHv3 3/5] verify-commit: scriptable commit signature verification Michael J Gruber
2014-06-23 7:05 ` [PATCHv3 4/5] t7510: exit for loop with test result Michael J Gruber
2014-06-23 7:05 ` [PATCHv3 5/5] t7510: test verify-commit Michael J Gruber
2014-06-23 23:02 ` Junio C Hamano
2014-06-23 17:28 ` [PATCHv3 0/5] verify-commit: verify commit signatures Jeff King
2014-06-23 17:52 ` Junio C Hamano
2014-06-23 21:09 ` Jeff King
2014-06-23 21:23 ` Junio C Hamano
2014-06-27 14:13 ` [PATCHv4 0/4] " Michael J Gruber
2014-06-27 14:13 ` [PATCHv4 1/4] gpg-interface: provide clear helper for struct signature_check Michael J Gruber
2014-06-27 14:13 ` [PATCHv4 2/4] gpg-interface: provide access to the payload Michael J Gruber
2014-06-27 14:13 ` [PATCHv4 3/4] verify-commit: scriptable commit signature verification Michael J Gruber
2014-06-27 14:13 ` [PATCHv4 4/4] t7510: test verify-commit Michael J Gruber
2014-06-27 19:32 ` Junio C Hamano
2014-06-27 20:26 ` Michael J Gruber
2014-06-27 19:07 ` [PATCHv4 0/4] verify-commit: verify commit signatures Junio C Hamano
2014-06-28 0:48 ` Jeff King
2014-06-28 0:49 ` Jeff King
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