Add a new function create_symref_common_dir. This function passes
REF_COMMON_DIR to lock_ref_sha1_basic, unlike create_symref, so to make
it possible to update main working tree's per-worktree symbolic refs
(HEAD) when we are in a linked working tree.
Assume we have a linked working tree and we are in it. If we call
create_symref("HEAD", "refs/heads/branch-a", NULL), this updates the
working tree's HEAD, located at .git/worktrees/tree-a/HEAD, rather than
the main working tree's HEAD, .git/HEAD.
The new function create_symref_common_dir always updates the main
working tree's HEAD regardless of where we are.
This will be needed when renaming a branch.
Signed-off-by: Kazuki Yamaguchi <k...@rhe.jp>
---
refs.h | 3 +++
refs/files-backend.c | 17 ++++++++++++++---
2 files changed, 17 insertions(+), 3 deletions(-)
diff --git a/refs.h b/refs.h
index dc4782241e49..ff8dbbe1a0e5 100644
--- a/refs.h
+++ b/refs.h
@@ -312,7 +312,10 @@ extern char *shorten_unambiguous_ref(const char *refname,
int strict);
/** rename ref, return 0 on success **/
extern int rename_ref(const char *oldref, const char *newref, const char
*logmsg);
+/* create or update a symref */
extern int create_symref(const char *refname, const char *target, const char
*logmsg);
+/* same as create_symref, but refname is always $GIT_COMMON_DIR/refname */
+extern int create_symref_common_dir(const char *refname, const char *target,
const char *logmsg);
enum action_on_err {
UPDATE_REFS_MSG_ON_ERR,
diff --git a/refs/files-backend.c b/refs/files-backend.c
index 2a808d520213..1fe4d4e75188 100644
--- a/refs/files-backend.c
+++ b/refs/files-backend.c
@@ -2886,14 +2886,15 @@ static int create_symref_locked(struct ref_lock *lock,
const char *refname,
return 0;
}
-int create_symref(const char *refname, const char *target, const char *logmsg)
+static int create_symref_internal(const char *refname, const char *target,
+ const char *logmsg, unsigned int flags)
{
struct strbuf err = STRBUF_INIT;
struct ref_lock *lock;
int ret;
- lock = lock_ref_sha1_basic(refname, NULL, NULL, NULL, REF_NODEREF, NULL,
- &err);
+ lock = lock_ref_sha1_basic(refname, NULL, NULL, NULL, REF_NODEREF |
flags,
+ NULL, &err);
if (!lock) {
error("%s", err.buf);
strbuf_release(&err);
@@ -2905,6 +2906,16 @@ int create_symref(const char *refname, const char
*target, const char *logmsg)
return ret;
}
+int create_symref(const char *refname, const char *target, const char *logmsg)
+{
+ return create_symref_internal(refname, target, logmsg, 0);
+}
+
+int create_symref_common_dir(const char *refname, const char *target, const
char *logmsg)
+{
+ return create_symref_internal(refname, target, logmsg, REF_COMMON_DIR);
+}
+
int reflog_exists(const char *refname)
{
struct stat st;
--
2.8.0.rc4.21.g05df949
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