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refs API: make refs_read_raw_ref() not set errno

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Add a "failure_errno" to refs_read_raw_ref(), his allows
refs_werrres_ref_unsafe() to pass along its "failure_errno", as a
first step before its own callers are migrated to pass it further up
the chain.

We are leaving out out the refs_read_special_head() in
refs_read_raw_ref() for now, as noted in a subsequent commit moving it
to "failure_errno" will require some special consideration.

Signed-off-by: Han-Wen Nienhuys <hanwen@google.com>
Signed-off-by: Ævar Arnfjörð Bjarmason <avarab@gmail.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
This commit is contained in:
Han-Wen Nienhuys
2021-10-16 11:39:09 +02:00
committed by Junio C Hamano
parent ef18119dec
commit 8b72fea7e9
4 changed files with 29 additions and 18 deletions
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7
refs/packed-backend.c
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@ -1347,6 +1347,7 @@ int is_packed_transaction_needed(struct ref_store *ref_store,
ret = 0;
for (i = 0; i < transaction->nr; i++) {
struct ref_update *update = transaction->updates[i];
int failure_errno;
unsigned int type;
struct object_id oid;
@ -1357,9 +1358,9 @@ int is_packed_transaction_needed(struct ref_store *ref_store,
*/
continue;
if (!refs_read_raw_ref(ref_store, update->refname,
&oid, &referent, &type) ||
errno != ENOENT) {
if (!refs_read_raw_ref(ref_store, update->refname, &oid,
&referent, &type, &failure_errno) ||
failure_errno != ENOENT) {
/*
* We have to actually delete that reference
* -> this transaction is needed.