[PATCH 2/7] submodule-config: add helper function to get 'fetch' config from .gitmodules

[Antonio Ospite]

Add a helper function to make it clearer that retrieving 'fetch'
configuration from the .gitmodules file is a special case supported
solely for backward compatibility purposes.

This change removes one direct use of 'config_from_gitmodules' in code
not strictly related to submodules, in the effort to communicate better
that .gitmodules is not to be used as a mechanism to store arbitrary
configuration in the repository that any command can retrieve.

Signed-off-by: Antonio Ospite <a...@ao2.it>
---
 builtin/fetch.c    | 15 +--------------
 submodule-config.c | 28 ++++++++++++++++++++++++++++
 submodule-config.h |  2 ++
 3 files changed, 31 insertions(+), 14 deletions(-)

diff --git a/builtin/fetch.c b/builtin/fetch.c
index ea5b9669a..92a5d235d 100644
--- a/builtin/fetch.c
+++ b/builtin/fetch.c
@@ -93,19 +93,6 @@ static int git_fetch_config(const char *k, const char *v, 
void *cb)
        return git_default_config(k, v, cb);
 }
 
-static int gitmodules_fetch_config(const char *var, const char *value, void 
*cb)
-{
-       if (!strcmp(var, "submodule.fetchjobs")) {
-               max_children = parse_submodule_fetchjobs(var, value);
-               return 0;
-       } else if (!strcmp(var, "fetch.recursesubmodules")) {
-               recurse_submodules = parse_fetch_recurse_submodules_arg(var, 
value);
-               return 0;
-       }
-
-       return 0;
-}
-
 static int parse_refmap_arg(const struct option *opt, const char *arg, int 
unset)
 {
        /*
@@ -1433,7 +1420,7 @@ int cmd_fetch(int argc, const char **argv, const char 
*prefix)
        for (i = 1; i < argc; i++)
                strbuf_addf(&default_rla, " %s", argv[i]);
 
-       config_from_gitmodules(gitmodules_fetch_config, NULL);
+       fetch_config_from_gitmodules(&max_children, &recurse_submodules);
        git_config(git_fetch_config, NULL);
 
        argc = parse_options(argc, argv, prefix,
diff --git a/submodule-config.c b/submodule-config.c
index b431555db..ef292eb7c 100644
--- a/submodule-config.c
+++ b/submodule-config.c
@@ -688,3 +688,31 @@ void config_from_gitmodules(config_fn_t fn, void *data)
                free(file);
        }
 }
+
+struct fetch_config {
+       int *max_children;
+       int *recurse_submodules;
+};
+
+static int gitmodules_fetch_config(const char *var, const char *value, void 
*cb)
+{
+       struct fetch_config *config = cb;
+       if (!strcmp(var, "submodule.fetchjobs")) {
+               *(config->max_children) = parse_submodule_fetchjobs(var, value);
+               return 0;
+       } else if (!strcmp(var, "fetch.recursesubmodules")) {
+               *(config ->recurse_submodules) = 
parse_fetch_recurse_submodules_arg(var, value);
+               return 0;
+       }
+
+       return 0;
+}
+
+void fetch_config_from_gitmodules(int *max_children, int *recurse_submodules)
+{
+       struct fetch_config config = {
+               .max_children = max_children,
+               .recurse_submodules = recurse_submodules
+       };
+       config_from_gitmodules(gitmodules_fetch_config, &config);
+}
diff --git a/submodule-config.h b/submodule-config.h
index 5148801f4..cff297a75 100644
--- a/submodule-config.h
+++ b/submodule-config.h
@@ -66,4 +66,6 @@ int check_submodule_name(const char *name);
  */
 extern void config_from_gitmodules(config_fn_t fn, void *data);
 
+extern void fetch_config_from_gitmodules(int *max_children, int 
*recurse_submodules);
+
 #endif /* SUBMODULE_CONFIG_H */
-- 
2.18.0