Use `git_config_get_string()` instead of `git_config()` to take advantage of
the config-set API which provides a cleaner control flow. While we are at
it, return -1 if we find no value for the queried variable. Original code
returned 0 for all cases, which was checked by `add_branch_desc()` in
fmt-merge-msg.c resulting in addition of a spurious newline to the `out`
strbuf. Now, the newline addition is skipped as -1 is returned to the caller
if no value is found.

Signed-off-by: Tanay Abhra <tanay...@gmail.com>
---
v3: Changed the commit message to a more appropriate one.

 branch.c | 27 +++++++--------------------
 1 file changed, 7 insertions(+), 20 deletions(-)

diff --git a/branch.c b/branch.c
index 735767d..df6b120 100644
--- a/branch.c
+++ b/branch.c
@@ -140,30 +140,17 @@ static int setup_tracking(const char *new_ref, const char 
*orig_ref,
        return 0;
 }

-struct branch_desc_cb {
-       const char *config_name;
-       const char *value;
-};
-
-static int read_branch_desc_cb(const char *var, const char *value, void *cb)
-{
-       struct branch_desc_cb *desc = cb;
-       if (strcmp(desc->config_name, var))
-               return 0;
-       free((char *)desc->value);
-       return git_config_string(&desc->value, var, value);
-}
-
 int read_branch_desc(struct strbuf *buf, const char *branch_name)
 {
-       struct branch_desc_cb cb;
+       char *v = NULL;
        struct strbuf name = STRBUF_INIT;
        strbuf_addf(&name, "branch.%s.description", branch_name);
-       cb.config_name = name.buf;
-       cb.value = NULL;
-       git_config(read_branch_desc_cb, &cb);
-       if (cb.value)
-               strbuf_addstr(buf, cb.value);
+       if (git_config_get_string(name.buf, &v)) {
+               strbuf_release(&name);
+               return -1;
+       }
+       strbuf_addstr(buf, v);
+       free(v);
        strbuf_release(&name);
        return 0;
 }
-- 1.9.0.GIT


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