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Documentation/config: clarify the meaning of submodule.<name>.update

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With more commands (that potentially change a submodule) paying attention
to submodules as well as the recent discussion[1] on
submodule.<name>.update, let's spell out that submodule.<name>.update
is strictly to be used for configuring the "submodule update" command
and not to be obeyed by other commands.

These other commands usually have a strict meaning of what they should
do (i.e. checkout, reset, rebase, merge) as well as have their name
overlapping with the modes possible for submodule.<name>.update.

[1] https://public-inbox.org/git/4283F0B0-BC1C-4ED1-8126-7E512D84484B@gmail.com/
    submodule.<name>.update was set to "none", triggering unexpected
    behavior as the submodule was thought to never be touched.
    However a newer version of Git taught 'git pull --rebase' to also
    populate and rebase submodules if they were active.
    The newer options such as submodule.active and command specific
    flags would not have triggered unexpected behavior.

Reported-by: Lars Schneider <larsxschneider@gmail.com>
Signed-off-by: Stefan Beller <sbeller@google.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
This commit is contained in:
Stefan Beller 2017-09-22 15:52:50 -07:00 committed by Junio C Hamano
parent 59c0ea183a
commit d3a44f637e
1 changed files with 8 additions and 4 deletions
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12
Documentation/config.txt
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@ -3085,10 +3085,14 @@ submodule.<name>.url::
See linkgit:git-submodule[1] and linkgit:gitmodules[5] for details.
submodule.<name>.update::
The default update procedure for a submodule. This variable
is populated by `git submodule init` from the
linkgit:gitmodules[5] file. See description of 'update'
command in linkgit:git-submodule[1].
The method by which a submodule is updated by 'git submodule update',
which is the only affected command, others such as
'git checkout --recurse-submodules' are unaffected. It exists for
historical reasons, when 'git submodule' was the only command to
interact with submodules; settings like `submodule.active`
and `pull.rebase` are more specific. It is populated by
`git submodule init` from the linkgit:gitmodules[5] file.
See description of 'update' command in linkgit:git-submodule[1].
submodule.<name>.branch::
The remote branch name for a submodule, used by `git submodule