Re: git init --separate-git-dir does not update symbolic .git links for submodules

On Tue, Mar 7, 2017 at 11:52 AM, Valery Tolstov <me@vtolstov.org> wrote:

static int module_list_compute(int argc, const char **argv,
                               const char *prefix,
                               struct pathspec *pathspec,
                               struct module_list *list)

argc, argv and prefix are just passed through from each caller argc is the number of arguments on the command line, argv is an array of said arguments on the command line, prefix is the position inside the repository.

e.g. If in git.git in Documentation/, you run a git command
"git submodule--helper module_list *"
then first "git" and "submodule--helper" are removed,
and then cmd_submodule__helper is called (at the end of
the submodule helper, which then sees
    argc=2, argv=["module_list", "*"],
    prefix="Documentation/"
which then proceeds to into module_list().

That parses these arguments, but there is no argument it knows about, so it does nothing.

Then it just passes these three (argc, argv, prefix) to module_list_compute, which then makes up the list, to be stored in the last parameter 'list'.

The 'pathspec' parameter seems weird. Internally the arguments mentioned above are converted to a pathspec, such that we can go through all files and call match_pathspec inside of module_list_compute.

In all but one cases we do not care about the pathspec, but in one case (in update_clone) we want to issue a warning if the pathspec was empty (i.e. the user just said "git submodule--helper update_clone" with no further path arguments)