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branch: stop modifying `log_all_ref_updates` variable 

In "branch.c" we modify the global `log_all_ref_updates` variable to
force creation of a reflog entry. Modifying global state like this is
discouraged, as it may have all kinds of consequences in other places of
our codebase.

Stop modifying the variable and pass the `REF_FORCE_CREATE_REFLOG` flag
instead. Setting this flag has a stronger meaning than setting the
config to `LOG_REFS_NORMAL`:

  - `LOG_REFS_NORMAL` will ask us to only create reflog entries for
    preexisting reflogs or branches, remote refs, note refs and HEAD.

  - `REF_FORCE_CREATE_REFLOG` will unconditionally create a reflog and
    is thus equivalent to `LOG_REFS_ALWAYS`.

But as we are in `create_branch()` and thus do not have to worry about
arbitrary references, but only about branches, `LOG_REFS_NORMAL` and
`LOG_REFS_ALWAYS` are indeed equivalent.

Signed-off-by: Patrick Steinhardt <ps@pks.im>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
maint
Patrick Steinhardt 2024-09-12 13:30:10 +02:00 committed by Junio C Hamano
parent f1d3d07900
commit 118fd1a26d
1 changed files with 3 additions and 2 deletions
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5
branch.c
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@ -601,6 +601,7 @@ void create_branch(struct repository *r,
int forcing = 0;
struct ref_transaction *transaction;
struct strbuf err = STRBUF_INIT;
int flags = 0;
char *msg;

if (track == BRANCH_TRACK_OVERRIDE)
@ -619,7 +620,7 @@ void create_branch(struct repository *r,
goto cleanup;

if (reflog)
log_all_ref_updates = LOG_REFS_NORMAL;
flags |= REF_FORCE_CREATE_REFLOG;

if (forcing)
msg = xstrfmt("branch: Reset to %s", start_name);
@ -630,7 +631,7 @@ void create_branch(struct repository *r,
if (!transaction ||
ref_transaction_update(transaction, ref.buf,
&oid, forcing ? NULL : null_oid(),
NULL, NULL, 0, msg, &err) ||
NULL, NULL, flags, msg, &err) ||
ref_transaction_commit(transaction, &err))
die("%s", err.buf);
ref_transaction_free(transaction);