Allow the caller to specify that it only wants to update the symref if
it does not already exist. Silently ignore the error from the
transaction API if the symref already exists.
Signed-off-by: Bence Ferdinandy <bence@xxxxxxxxxxxxxx>
---
Notes:
v4: new patch
v5: no change
v6: - switched from bool to int for create_only
- refactored logic in refs_update_symref with goto as layed out by
Junio
v7: - change commit prefix to be more in line with project standards
- refactored code to accommodate changes in the first patch, but
otherwise no change
v8: no change
v9: - no change (except for following through the
refs_update_symref_extended refactoring)
v10: no change
v11: no change
v12: no change
v13: changes only due to changes in previous patch
v14: no change
builtin/remote.c | 2 +-
refs.c | 33 ++++++++++++++++++++++++---------
refs.h | 2 +-
3 files changed, 26 insertions(+), 11 deletions(-)
diff --git a/builtin/remote.c b/builtin/remote.c
index 6d659d63ca..3dc1135b5c 100644
--- a/builtin/remote.c
+++ b/builtin/remote.c
@@ -1476,7 +1476,7 @@ static int set_head(int argc, const char **argv, const char *prefix)
goto cleanup;
}
was_detached = refs_update_symref_extended(refs, b_head.buf, b_remote_head.buf,
- "remote set-head", &b_local_head);
+ "remote set-head", &b_local_head, 0);
if (was_detached == -1) {
result |= error(_("Could not set up %s"), b_head.buf);
goto cleanup;
diff --git a/refs.c b/refs.c
index d80efd58f0..2efa6bcc5c 100644
--- a/refs.c
+++ b/refs.c
@@ -2116,26 +2116,38 @@ int peel_iterated_oid(struct repository *r, const struct object_id *base, struct
int refs_update_symref(struct ref_store *refs, const char *ref,
const char *target, const char *logmsg)
{
- return refs_update_symref_extended(refs, ref, target, logmsg, NULL);
+ return refs_update_symref_extended(refs, ref, target, logmsg, NULL, 0);
}
int refs_update_symref_extended(struct ref_store *refs, const char *ref,
const char *target, const char *logmsg,
- struct strbuf *referent)
+ struct strbuf *referent, int create_only)
{
struct ref_transaction *transaction;
struct strbuf err = STRBUF_INIT;
- int ret = 0;
+ int ret = 0, prepret = 0;
transaction = ref_store_transaction_begin(refs, &err);
- if (!transaction ||
- ref_transaction_update(transaction, ref, NULL, NULL,
- target, NULL, REF_NO_DEREF,
- logmsg, &err) ||
- ref_transaction_prepare(transaction, &err)) {
+ if (!transaction) {
+ error_return:
ret = error("%s", err.buf);
goto cleanup;
}
+ if (create_only) {
+ if (ref_transaction_create(transaction, ref, NULL, target,
+ REF_NO_DEREF, logmsg, &err))
+ goto error_return;
+ prepret = ref_transaction_prepare(transaction, &err);
+ if (prepret && prepret != TRANSACTION_CREATE_EXISTS)
+ goto error_return;
+ } else {
+ if (ref_transaction_update(transaction, ref, NULL, NULL,
+ target, NULL, REF_NO_DEREF,
+ logmsg, &err) ||
+ ref_transaction_prepare(transaction, &err))
+ goto error_return;
+ }
+
if (referent && refs_read_symbolic_ref(refs, ref, referent) == NOT_A_SYMREF) {
struct object_id oid;
if (!refs_read_ref(refs, ref, &oid)) {
@@ -2144,8 +2156,11 @@ int refs_update_symref_extended(struct ref_store *refs, const char *ref,
}
}
+ if (prepret == TRANSACTION_CREATE_EXISTS)
+ goto cleanup;
+
if (ref_transaction_commit(transaction, &err))
- ret = error("%s", err.buf);
+ goto error_return;
cleanup:
strbuf_release(&err);
diff --git a/refs.h b/refs.h
index b243739e4b..be38377b1f 100644
--- a/refs.h
+++ b/refs.h
@@ -586,7 +586,7 @@ int refs_update_symref(struct ref_store *refs, const char *refname,
int refs_update_symref_extended(struct ref_store *refs, const char *refname,
const char *target, const char *logmsg,
- struct strbuf *referent);
+ struct strbuf *referent, int create_only);
enum action_on_err {
UPDATE_REFS_MSG_ON_ERR,
--
2.47.0.298.g52a96ec17b
