.gitmodules

[submodule]
    # Allow git to automatically determine the number of submodule operations it can run in parallel
    fetchJobs = 0
    # Enables the `--recurse-submodules` flag automatically for all commands except `clone` and `ls-files`
    recurse = true

[submodule "self"]
    path = self
    url = https://github.com/D-Pow/self
    fetchRecurseSubmodules = on-demand
    # Enables `--remote` automatically for the `update` command.
    # This ensures submodules' file changes are pushed/pulled from their repos; i.e.
    #   `submodule update --remote --merge` merges upstream submodule changes into the submodules
    #   `submodule update --merge` only merges parent git-link changes into the submodules
    #
    # Ensures changes in `branch-a` of parent don't affect `master` in submodule.
    #
    # See:
    #   https://git-scm.com/docs/gitmodules#Documentation/gitmodules.txt-submoduleltnamegtbranch
    branch = .
    # Makes the `update` command choose "merge" instead of "checkout" (leaves HEAD in a detached state) or "rebase" (local rebased onto remote, meaning commit hashes are lost).
    #
    # See:
    #   https://git-scm.com/docs/git-submodule#Documentation/git-submodule.txt-merge
    update = merge