Re: Submodule regression in 2.14?

[Lars Schneider <larsxschneider@gmail.com>]

> On 17 Aug 2017, at 23:55, Stefan Beller <sbeller@google.com> wrote:
> 
> On Thu, Aug 17, 2017 at 2:21 PM, Lars Schneider
> <larsxschneider@gmail.com> wrote:
>> 
>>> Oh, wait.
>>> $ git log --oneline v2.13.0..v2.14.1 -- builtin/pull.c
>>> c9c63ee558 Merge branch 'sb/pull-rebase-submodule'
>>> a6d7eb2c7a pull: optionally rebase submodules (remote submodule changes only)
>>> could also be a culprit. Do you have pull.rebase set?
>> 
>> I bisected the problem today and "a6d7eb2c7a pull: optionally rebase submodules
>> (remote submodule changes only)" is indeed the culprit.
>> 
>> The commit seems to break the following test case.
>> 
>> diff --git a/t/t7400-submodule-basic.sh b/t/t7400-submodule-basic.sh
>> index dcac364c5f..24f9729015 100755
>> --- a/t/t7400-submodule-basic.sh
>> +++ b/t/t7400-submodule-basic.sh
>> @@ -1289,4 +1289,19 @@ test_expect_success 'init properly sets the config' '
>>        test_must_fail git -C multisuper_clone config --get submodule.sub1.active
>> '
>> 
>> +test_expect_success 'submodule update and git pull with disabled submodule' '
>> +       test_when_finished "rm -rf multisuper_clone" &&
>> +       pwd=$(pwd) &&
>> +       git clone file://"$pwd"/multisuper multisuper_clone &&
>> +       (
>> +               cd multisuper_clone &&
>> +               git config --local submodule.sub0.update none &&
>> +               git submodule update --init --recursive &&
>> +               git pull --recurse-submodules &&
>> +               git submodule status | cut -c 1,43- >actual
>> +       ) &&
>> +       ls &&
>> +       test_cmp expect multisuper_clone/actual
>> +'
> 
> Thanks for providing this test.
> 
> cd trash directory.t7400-submodule-basic/multisuper_clone
> cat .git/config
> [submodule "sub0"]
>  update = none
>  active = true
>  url = file:///.../t/trash directory.t7400-submodule-basic/sub1
> 
> 
> submodule.<name>.update
>    The default update procedure for a submodule.
>    This variable is populated by git submodule init
>    from the gitmodules(5) file. See description of
>    update command in git-submodule(1).
> 
> The first sentence of .update is misleading IMHO as the
> these settings should strictly apply to the "submodule update"
> command. So "pull --recurse-submodules" ought to ignore it,
> instead the pull can do whatever it wants, namely treat the
> submodule roughly like a tree and either merge/rebase
> inside the submodule as well. The user *asked* for recursive
> pull after all.
> 
> Are you saying this might be a design mistake and
> the .update ought to be respected by all the other
> commands? For example
>    git reset --recurse-submodules
> should ignore the .update= none?
> 
> When designing these new recursive submodule functionality
> outside the "submodule" command, I'd want submodules
> to behave as much as possible like trees.

In the past "submodule.<name>.update=none" was an easy way
to selectively disable certain Submodules.

How would I do this with Git 2.14?

My gut feeling is that all commands should respect the
"submodule.<name>.update=none" setting.

- Lars