From: Junio C Hamano <gitster@pobox.com>
To: <lin.sun@zoom.us>
Cc: "'sunlin via GitGitGadget'" <gitgitgadget@gmail.com>,
<git@vger.kernel.org>, "'sunlin'" <sunlin7@yahoo.com>
Subject: Re: [PATCH v9] Support auto-merge for meld to follow the vim-diff behavior
Date: Tue, 07 Jul 2020 18:51:42 -0700 [thread overview]
Message-ID: <xmqqeepm3hap.fsf@gitster.c.googlers.com> (raw)
In-Reply-To: <04e201d654c6$016bfb40$0443f1c0$@zoom.us> (lin sun's message of "Wed, 8 Jul 2020 09:20:40 +0800")
<lin.sun@zoom.us> writes:
> if meld_use_auto_merge_option =` git config --bool ...`
> then
> # success, maybe "(empty)"/true/false
> if test -z "$ meld_use_auto_merge_option"
> then
> meld_use_auto_merge_option=false
> fi
The inner test does not make any sense to me; I doubt that you can
get an empty output from a "git config --bool" that succeeds.
$ cat >config <<\EOF
[x] a
b=true
c=1
d=false
e=no
f=bogus
EOF
$ for i in a b c d e f
do
if v=$(git config --file=config --bool x.$i 2>/dev/null)
then
echo "succeeds (x.$i) => '$v'"
else
echo "fails (x.$i) => '$v'"
fi
done
You should see
succeeds (x.a) => 'true'
succeeds (x.b) => 'true'
succeeds (x.c) => 'true'
succeeds (x.d) => 'false'
succeeds (x.e) => 'false'
fails (x.f) => ''
if you run the above. The most interesting is how all boolean
values are normalized to true and false regardless of how they are
originally spelled.
> else
> # failed, the option is not empty or Boolean
> if test "auto" = ` git config `
> then
> # detect the "--auto-merge" option
> else
> meld_use_auto_merge_option=false
I think review by Đoàn pointed out that we would want to warn/fail
loudly in this "else" case, as it is likely a misspelt configuration
value?
To recap, I think something along the following lines would be the
most readable and acceptably efficient with a short-cut for the
common cases.
var=mergetool.meld.whatever
val=$(git config $var)
case "$val" in
true | false)
# we can take a short-cut without asking config --bool
... use $val ...
;;
auto)
... auto detect ...
;;
*)
if val=$(git config --bool $var 2>/dev/null)
then
# succeeded, so val must be a normalized boolean
... use $val ...
else
die cannot parse $var
fi
easc
Thanks.
next prev parent reply other threads:[~2020-07-08 1:51 UTC|newest]
Thread overview: 74+ messages / expand[flat|nested] mbox.gz Atom feed top
2020-05-08 1:25 [PATCH] Enable auto-merge for meld to follow the vim-diff beharior sunlin via GitGitGadget
2020-06-08 9:49 ` Pratyush Yadav
2020-06-09 3:19 ` [PATCH v2] " sunlin via GitGitGadget
2020-06-29 7:07 ` [PATCH v3] " sunlin via GitGitGadget
2020-06-29 12:32 ` Fwd: " Git Gadget
2020-06-30 0:06 ` Junio C Hamano
2020-06-30 7:42 ` David Aguilar
2020-06-30 11:25 ` lin.sun
2020-06-30 11:37 ` lin.sun
2020-06-30 15:51 ` Junio C Hamano
2020-06-30 11:26 ` [PATCH v4] " sunlin via GitGitGadget
2020-06-30 16:23 ` Đoàn Trần Công Danh
2020-06-30 23:01 ` Đoàn Trần Công Danh
2020-07-01 7:06 ` [PATCH v5] " sunlin via GitGitGadget
2020-07-01 7:23 ` lin.sun
2020-07-01 18:19 ` David Aguilar
2020-07-01 14:17 ` Đoàn Trần Công Danh
2020-07-01 15:32 ` lin.sun
2020-07-01 22:02 ` lin.sun
2020-07-01 23:06 ` Đoàn Trần Công Danh
2020-07-01 19:51 ` Junio C Hamano
2020-07-02 0:20 ` lin.sun
2020-07-02 0:44 ` [PATCH v6] Support auto-merge for meld to follow the vim-diff behavior sunlin via GitGitGadget
2020-07-02 2:35 ` lin.sun
2020-07-03 1:50 ` Junio C Hamano
2020-07-03 3:53 ` lin.sun
2020-07-03 15:58 ` Đoàn Trần Công Danh
2020-07-06 6:23 ` Junio C Hamano
2020-07-03 3:26 ` [PATCH v7] " sunlin via GitGitGadget
2020-07-03 4:50 ` Junio C Hamano
2020-07-04 1:18 ` lin.sun
2020-07-06 2:36 ` lin.sun
2020-07-04 1:16 ` [PATCH v8] " sunlin via GitGitGadget
2020-07-06 2:27 ` [PATCH v9] " sunlin via GitGitGadget
2020-07-06 22:31 ` Junio C Hamano
2020-07-07 6:34 ` lin.sun
2020-07-07 16:43 ` Junio C Hamano
2020-07-08 1:20 ` lin.sun
2020-07-08 1:51 ` Junio C Hamano [this message]
2020-07-07 6:17 ` [PATCH v10] " sunlin via GitGitGadget
2020-07-07 6:25 ` Junio C Hamano
2020-07-07 6:38 ` lin.sun
2020-07-07 6:44 ` lin.sun
2020-07-07 7:13 ` [PATCH v11] " sunlin via GitGitGadget
2020-07-07 15:31 ` Đoàn Trần Công Danh
2020-07-08 0:57 ` lin.sun
2020-07-08 3:25 ` [PATCH v12] " sunlin via GitGitGadget
2020-07-08 3:31 ` lin.sun
2020-07-08 15:42 ` Đoàn Trần Công Danh
2020-07-08 15:47 ` lin.sun
2020-07-09 0:35 ` [PATCH v13] " sunlin via GitGitGadget
2020-07-09 0:39 ` lin.sun
2020-07-09 2:42 ` Junio C Hamano
2020-07-09 2:56 ` Junio C Hamano
2020-07-09 3:24 ` lin.sun
2020-07-09 4:49 ` Junio C Hamano
2020-07-09 5:31 ` Junio C Hamano
2020-07-12 14:07 ` lin.sun
2020-07-12 23:38 ` lin.sun
2020-07-09 4:28 ` [PATCH v14] " sunlin via GitGitGadget
2020-07-12 8:39 ` [PATCH v15] " sunlin via GitGitGadget
2020-07-12 9:08 ` [PATCH v16] " sunlin via GitGitGadget
2020-07-12 18:04 ` Junio C Hamano
2020-07-12 23:26 ` lin.sun
2020-07-13 5:14 ` Junio C Hamano
2020-07-13 6:58 ` lin.sun
2020-07-12 23:32 ` [PATCH v17] " sunlin via GitGitGadget
2020-07-24 0:58 ` Junio C Hamano
2020-09-03 21:48 ` Junio C Hamano
[not found] ` <C35AC799-B4F6-4A5E-92FA-21065310B379@hxcore.ol>
2020-09-09 1:31 ` Lin Sun
2020-09-09 20:43 ` Junio C Hamano
2020-09-12 7:21 ` [PATCH v18] " sunlin via GitGitGadget
2020-09-14 20:07 ` Junio C Hamano
2020-09-15 0:55 ` Lin Sun
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