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Probably very silly question, - but I've been specifying submodules up until now in .gitmodules file. It recently struck me that perhaps it's possible to just use .git/config for the same reason so I won't have to keep extraneous file in working directory?
.git/config :
[submodule "path/to/repo"] url = [email protected]:username/repo.git .gitmodules
[submodule "path/to/repo"] path = path/to/repo url = [email protected]:username/repo.git Are these basically the same things?
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In most cases, Git submodules are used when your project becomes more complex, and while your project depends on the main Git repository, you might want to keep their change history separate. Using the above as an example, the Room repository depends on the House repository, but they operate separately.
Git submodules allow you to keep a git repository as a subdirectory of another git repository. Git submodules are simply a reference to another repository at a particular snapshot in time. Git submodules enable a Git repository to incorporate and track version history of external code.
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 git-config[1]. The file contains one subsection per submodule, and the subsection value is the name of the submodule.
The first important advantage to using submodules is that submodules allow you to keep the commit history of the component you're including in your project. Assuming the component you're adding is publicly available as a git repository, incorporating this component without the use of submodules presents a problem.
Same answer than .git/info/exclude and .gitignore.
The .gitmodules file can be included in the repository and shared with everyone (that is, it can be added and committed like any regular file), whereas anything in .git (like .git/config) is private (you cannot add it in the repository).
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