[PATCH v4 2/9] submodule: factor out a config_set_in_gitmodules_file_gently function

[Antonio Ospite]

Introduce a new config_set_in_gitmodules_file_gently() function to write
config values to the .gitmodules file.

This is in preparation for a future change which will use the function
to write to the .gitmodules file in a more controlled way instead of
using "git config -f .gitmodules".

The purpose of the change is mainly to centralize the code that writes
to the .gitmodules file to avoid some duplication.

The naming follows git_config_set_in_file_gently() but the git_ prefix
is removed to communicate that this is not a generic git-config API.

Signed-off-by: Antonio Ospite <a...@ao2.it>
---
 submodule-config.c | 12 ++++++++++++
 submodule-config.h |  1 +
 submodule.c        | 10 +++-------
 3 files changed, 16 insertions(+), 7 deletions(-)

diff --git a/submodule-config.c b/submodule-config.c
index eef96c4198..b7ef055c63 100644
--- a/submodule-config.c
+++ b/submodule-config.c
@@ -707,6 +707,18 @@ int print_config_from_gitmodules(const char *key)
        return 0;
 }
 
+int config_set_in_gitmodules_file_gently(const char *key, const char *value)
+{
+       int ret;
+
+       ret = git_config_set_in_file_gently(GITMODULES_FILE, key, value);
+       if (ret < 0)
+               /* Maybe the user already did that, don't error out here */
+               warning(_("Could not update .gitmodules entry %s"), key);
+
+       return ret;
+}
+
 struct fetch_config {
        int *max_children;
        int *recurse_submodules;
diff --git a/submodule-config.h b/submodule-config.h
index ed40e9a478..9957bcbbfa 100644
--- a/submodule-config.h
+++ b/submodule-config.h
@@ -57,6 +57,7 @@ void submodule_free(struct repository *r);
 int check_submodule_name(const char *name);
 
 int print_config_from_gitmodules(const char *key);
+int config_set_in_gitmodules_file_gently(const char *key, const char *value);
 
 /*
  * Note: these helper functions exist solely to maintain backward
diff --git a/submodule.c b/submodule.c
index 50cbf5f13e..36a9465acb 100644
--- a/submodule.c
+++ b/submodule.c
@@ -89,6 +89,7 @@ int update_path_in_gitmodules(const char *oldpath, const char 
*newpath)
 {
        struct strbuf entry = STRBUF_INIT;
        const struct submodule *submodule;
+       int ret;
 
        if (!file_exists(GITMODULES_FILE)) /* Do nothing without .gitmodules */
                return -1;
@@ -104,14 +105,9 @@ int update_path_in_gitmodules(const char *oldpath, const 
char *newpath)
        strbuf_addstr(&entry, "submodule.");
        strbuf_addstr(&entry, submodule->name);
        strbuf_addstr(&entry, ".path");
-       if (git_config_set_in_file_gently(GITMODULES_FILE, entry.buf, newpath) 
< 0) {
-               /* Maybe the user already did that, don't error out here */
-               warning(_("Could not update .gitmodules entry %s"), entry.buf);
-               strbuf_release(&entry);
-               return -1;
-       }
+       ret = config_set_in_gitmodules_file_gently(entry.buf, newpath);
        strbuf_release(&entry);
-       return 0;
+       return ret;
 }
 
 /*
-- 
2.18.0