[PATCH 3/7] branch.c: extract read_branch_config function

[Denton Liu <liu.denton@gmail.com>]

In the future, we'll need to use `read_branch_config` as a generic base
for other branch-config reading functions. Extract it from
`read_branch_desc` so that it can be reused later.

Signed-off-by: Denton Liu <liu.denton@gmail.com>
---
 branch.c | 9 +++++++--
 1 file changed, 7 insertions(+), 2 deletions(-)

diff --git a/branch.c b/branch.c
index 28b81a7e02..4b49976924 100644
--- a/branch.c
+++ b/branch.c
@@ -162,11 +162,11 @@ static void setup_tracking(const char *new_ref, const char *orig_ref,
 	free(tracking.src);
 }
 
-int read_branch_desc(struct strbuf *buf, const char *branch_name)
+static int read_branch_config(struct strbuf *buf, const char *branch_name, const char *key)
 {
 	char *v = NULL;
 	struct strbuf name = STRBUF_INIT;
-	strbuf_addf(&name, "branch.%s.description", branch_name);
+	strbuf_addf(&name, "branch.%s.%s", branch_name, key);
 	if (git_config_get_string(name.buf, &v)) {
 		strbuf_release(&name);
 		return -1;
@@ -177,6 +177,11 @@ int read_branch_desc(struct strbuf *buf, const char *branch_name)
 	return 0;
 }
 
+int read_branch_desc(struct strbuf *buf, const char *branch_name)
+{
+	return read_branch_config(buf, branch_name, "description");
+}
+
 /*
  * Check if 'name' can be a valid name for a branch; die otherwise.
  * Return 1 if the named branch already exists; return 0 otherwise.
-- 
2.21.0.1049.geb646f7864