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From: Junio C Hamano <gitster@pobox.com>
To: Phillip Wood <phillip.wood123@gmail.com>
Cc: "ZheNing Hu via GitGitGadget" <gitgitgadget@gmail.com>,
	git@vger.kernel.org,
	"Christian Couder" <christian.couder@gmail.com>,
	"Hariom Verma" <hariom18599@gmail.com>,
	"Ævar Arnfjörð Bjarmason" <avarab@gmail.com>,
	"Han-Wen Nienhuys" <hanwen@google.com>,
	"Ramkumar Ramachandra" <artagnon@gmail.com>,
	"Felipe Contreras" <felipe.contreras@gmail.com>,
	"ZheNing Hu" <adlternative@gmail.com>
Subject: Re: [PATCH v3] [GSOC] cherry-pick: use better advice message
Date: Fri, 13 Aug 2021 13:14:44 -0700	[thread overview]
Message-ID: <xmqqzgtlumob.fsf@gitster.g> (raw)
In-Reply-To: <a510722c-d5a2-f00c-dd20-dd7f76da2408@gmail.com> (Phillip Wood's message of "Wed, 11 Aug 2021 11:00:32 +0100")

Phillip Wood <phillip.wood123@gmail.com> writes:

>> +++ b/t/t3507-cherry-pick-conflict.sh
>> @@ -53,9 +53,12 @@ test_expect_success 'advice from failed cherry-pick' "
>>   	picked=\$(git rev-parse --short picked) &&
>>   	cat <<-EOF >expected &&
>
> If you quote the here doc end marker then there is no substitution in
> the here doc so writing
>
> 	cat <<-\EOF >expected &&
>
>>   	error: could not apply \$picked... picked
>> -	hint: after resolving the conflicts, mark the corrected paths
>> -	hint: with 'git add <paths>' or 'git rm <paths>'
>> -	hint: and commit the result with 'git commit'
>> +	hint: Resolve all conflicts manually, mark them as resolved with
>> +	hint: \"git add/rm <conflicted_files>\", then run
>
> means you can replace \" with " here

Hmph, actually the double-quote that opens the body of
test_expect_success should be stared at with a very cautious eyes,
as they often do not mean what the author of the patch thought they
do.  I can see that it already fooled your eyes into thinking that
there is no substitution, but $picked needs to be substituted into
its value.  The backslash before it is *not* about guarding it from
substitution inside here-doc; it is to pass literal "$" into the
string, which is the last parameter to test_expect_success, that
gets eval'ed.

The original of this one, for example, would probably have been
better if written like so:

test_expect_success 'advice from failed cherry-pick' '
	pristine_detach initial &&
	SQ='\'' &&

	picked=$(git rev-parse --short picked) &&
	cat <<-EOF >expected &&
	error: could not apply $picked... picked
	hint: after resolving the conflicts, mark the corrected paths
	hint: with ${SQ}git add <paths>${SQ} or ${SQ}git rm <paths>${SQ}
	hint: and commit the result with ${SQ}git commit${SQ}
	EOF
	test_must_fail git cherry-pick picked 2>actual &&

	test_cmp expected actual
'

And because there is no single quote in the updated text, it would
become:

test_expect_success 'advice from failed cherry-pick' '
	pristine_detach initial &&

	picked=$(git rev-parse --short picked) &&
	cat <<-EOF >expected &&
	error: could not apply $picked... picked
	hint: Resolve all conflicts manually, mark them as resolved with
	hint: "git add/rm <conflicted_files>", then run
	EOF
	test_must_fail git cherry-pick picked 2>actual &&

	test_cmp expected actual
'

which makes it far easier to see that $picked needs to be
substituted, and the "git add/rm" are to be enclosed in dq pair.

  parent reply	other threads:[~2021-08-13 20:14 UTC|newest]

Thread overview: 32+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2021-07-31  7:01 [PATCH 0/2] [GSOC] cherry-pick: fix bug when used with GIT_CHERRY_PICK_HELP ZheNing Hu via GitGitGadget
2021-07-31  7:01 ` [PATCH 1/2] " ZheNing Hu via GitGitGadget
2021-08-01 10:09   ` Phillip Wood
2021-08-02 13:34     ` ZheNing Hu
2021-07-31  7:01 ` [PATCH 2/2] [GSOC] cherry-pick: use better advice message ZheNing Hu via GitGitGadget
2021-08-01 10:14   ` Phillip Wood
2021-08-02 13:35     ` ZheNing Hu
2021-08-03  1:16 ` [PATCH v2 0/2] [GSOC] cherry-pick: fix bug when used with GIT_CHERRY_PICK_HELP ZheNing Hu via GitGitGadget
2021-08-03  1:16   ` [PATCH v2 1/2] " ZheNing Hu via GitGitGadget
2021-08-03 22:36     ` Junio C Hamano
2021-08-04  8:35       ` ZheNing Hu
2021-08-04 10:10         ` Phillip Wood
2021-08-04 17:31           ` Junio C Hamano
2021-08-05  5:36             ` ZheNing Hu
2021-08-03  1:16   ` [PATCH v2 2/2] [GSOC] cherry-pick: use better advice message ZheNing Hu via GitGitGadget
2021-08-05  5:48   ` [PATCH v3] " ZheNing Hu via GitGitGadget
2021-08-11 10:00     ` Phillip Wood
2021-08-13  8:08       ` ZheNing Hu
2021-08-13 20:14       ` Junio C Hamano [this message]
2021-08-14  2:07         ` ZheNing Hu
2021-08-17 10:09         ` Phillip Wood
2021-08-14 10:27     ` [PATCH v4] " ZheNing Hu via GitGitGadget
2021-08-14 20:32       ` Junio C Hamano
2021-08-15 12:48         ` ZheNing Hu
2021-08-16  0:55       ` [PATCH v5] " ZheNing Hu via GitGitGadget
2021-08-18  9:51         ` Phillip Wood
2021-08-19  1:55           ` ZheNing Hu
2021-08-19  2:07             ` ZheNing Hu
2021-08-19  5:51         ` [PATCH v6] " ZheNing Hu via GitGitGadget
2021-08-19 17:10           ` Junio C Hamano
2021-08-21  1:40             ` ZheNing Hu
2021-08-22 13:08           ` [PATCH v7] " ZheNing Hu via GitGitGadget

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