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git/Documentation/gitmodules.txt
Jens Lehmann 73b0898d0d Teach "git submodule add" the --name option
"git submodule add" initializes the name of a submodule to its path. This
was ok as long as the .git directory lived inside the submodule's work
tree, but since 1.7.8 it is stored in the .git/modules/<name> directory of
the superproject, making the submodule name survive the removal of the
submodule's work tree. This leads to problems when the user tries to add a
different submodule at the same path - and thus the same name - later, as
that will happily try to restore the submodule from the old repository
instead of the one the user specified and will lead to a checkout of the
wrong repository.

Add the new "--name" option to let the user provide a name for the
submodule. This enables the user to solve this conflict without having to
remove .git/modules/<name> by hand (which is no viable solution as it
makes it impossible to checkout a commit that records the old submodule
and populate it, as that will still check out the new submodule for the
same reason).

To achieve that the submodule's name is added to the parameter list of
the module_clone() helper function. This makes it possible to remove the
call of module_name() there because both callers of module_clone() already
know the name and can provide it as argument number two.

Reported-by: Jonathan Johnson <me@jondavidjohn.com>
Signed-off-by: Jens Lehmann <Jens.Lehmann@web.de>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
2012-09-29 21:49:11 -07:00

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gitmodules(5)
=============
NAME
----
gitmodules - defining submodule properties
SYNOPSIS
--------
$GIT_WORK_DIR/.gitmodules
DESCRIPTION
-----------
The `.gitmodules` file, located in the top-level directory of a git
working tree, is a text file with a syntax matching the requirements
of linkgit:git-config[1].
The file contains one subsection per submodule, and the subsection value
is the name of the submodule. The name is set to the path where the
submodule has been added unless it was customized with the '--name'
option of 'git submodule add'. Each submodule section also contains the
following required keys:
submodule.<name>.path::
Defines the path, relative to the top-level directory of the git
working tree, where the submodule is expected to be checked out.
The path name must not end with a `/`. All submodule paths must
be unique within the .gitmodules file.
submodule.<name>.url::
Defines a URL from which the submodule repository can be cloned.
This may be either an absolute URL ready to be passed to
linkgit:git-clone[1] or (if it begins with ./ or ../) a location
relative to the superproject's origin repository.
submodule.<name>.update::
Defines what to do when the submodule is updated by the superproject.
If 'checkout' (the default), the new commit specified in the
superproject will be checked out in the submodule on a detached HEAD.
If 'rebase', the current branch of the submodule will be rebased onto
the commit specified in the superproject. If 'merge', the commit
specified in the superproject will be merged into the current branch
in the submodule.
If 'none', the submodule with name `$name` will not be updated
by default.
This config option is overridden if 'git submodule update' is given
the '--merge', '--rebase' or '--checkout' options.
submodule.<name>.fetchRecurseSubmodules::
This option can be used to control recursive fetching of this
submodule. If this option is also present in the submodules entry in
.git/config of the superproject, the setting there will override the
one found in .gitmodules.
Both settings can be overridden on the command line by using the
"--[no-]recurse-submodules" option to "git fetch" and "git pull".
submodule.<name>.ignore::
Defines under what circumstances "git status" and the diff family show
a submodule as modified. When set to "all", it will never be considered
modified, "dirty" will ignore all changes to the submodules work tree and
takes only differences between the HEAD of the submodule and the commit
recorded in the superproject into account. "untracked" will additionally
let submodules with modified tracked files in their work tree show up.
Using "none" (the default when this option is not set) also shows
submodules that have untracked files in their work tree as changed.
If this option is also present in the submodules entry in .git/config of
the superproject, the setting there will override the one found in
.gitmodules.
Both settings can be overridden on the command line by using the
"--ignore-submodule" option.
EXAMPLES
--------
Consider the following .gitmodules file:
[submodule "libfoo"]
path = include/foo
url = git://foo.com/git/lib.git
[submodule "libbar"]
path = include/bar
url = git://bar.com/git/lib.git
This defines two submodules, `libfoo` and `libbar`. These are expected to
be checked out in the paths 'include/foo' and 'include/bar', and for both
submodules a URL is specified which can be used for cloning the submodules.
SEE ALSO
--------
linkgit:git-submodule[1] linkgit:git-config[1]
GIT
---
Part of the linkgit:git[1] suite