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refs API: make files_copy_or_rename_ref() et al not set errno 

None of the callers of rename_ref() and copy_ref() care about errno,
and as seen in the context here we already emit our own non-errno
using error() in the case where we'd use it.

So let's have it explicitly ignore errno, and do the same in
commit_ref_update(), which is only used within other code in
files_copy_or_rename_ref() itself which doesn't care about errno
either.

It might actually be sensible to have the callers use errno if the
failure was filesystem-specific, and with the upcoming reftable
backend we don't want to rely on that sort of thing, so let's keep
ignoring that for now.

Signed-off-by: Ævar Arnfjörð Bjarmason <avarab@gmail.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
This commit is contained in:
Ævar Arnfjörð Bjarmason 2021-10-16 11:39:17 +02:00 committed by Junio C Hamano
parent 096a7fbb97
commit ac0986e302
1 changed files with 6 additions and 4 deletions
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10
refs/files-backend.c
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@ -1410,9 +1410,9 @@ static int files_copy_or_rename_ref(struct ref_store *ref_store,
goto out;
}
if (!refs_resolve_ref_unsafe(&refs->base, oldrefname,
if (!refs_werrres_ref_unsafe(&refs->base, oldrefname,
RESOLVE_REF_READING | RESOLVE_REF_NO_RECURSE,
&orig_oid, &flag)) {
&orig_oid, &flag, &ignore_errno)) {
ret = error("refname %s not found", oldrefname);
goto out;
}
@ -1823,10 +1823,12 @@ static int commit_ref_update(struct files_ref_store *refs,
*/
int head_flag;
const char *head_ref;
int ignore_errno;
head_ref = refs_resolve_ref_unsafe(&refs->base, "HEAD",
head_ref = refs_werrres_ref_unsafe(&refs->base, "HEAD",
RESOLVE_REF_READING,
NULL, &head_flag);
NULL, &head_flag,
&ignore_errno);
if (head_ref && (head_flag & REF_ISSYMREF) &&
!strcmp(head_ref, lock->ref_name)) {
struct strbuf log_err = STRBUF_INIT;