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refs: extract out refname verification in transactions

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Unless the `REF_SKIP_REFNAME_VERIFICATION` flag is set for an update,
the refname of the update is verified for:

  - Ensuring it is not a pseudoref.
  - Checking the refname format.

These checks will also be needed in a following commit where the
function to add reflog updates to the transaction is introduced. Extract
the code out into a new static function.

Signed-off-by: Karthik Nayak <karthik.188@gmail.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
This commit is contained in:
Karthik Nayak 2024-12-16 17:44:29 +01:00 committed by Junio C Hamano
parent 611986f300
commit add2c4f6e2
1 changed files with 23 additions and 14 deletions
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37
refs.c
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@ -1196,6 +1196,28 @@ struct ref_update *ref_transaction_add_update(
return update;
}
static int transaction_refname_valid(const char *refname,
const struct object_id *new_oid,
unsigned int flags, struct strbuf *err)
{
if (flags & REF_SKIP_REFNAME_VERIFICATION)
return 1;
if (is_pseudo_ref(refname)) {
strbuf_addf(err, _("refusing to update pseudoref '%s'"),
refname);
return 0;
} else if ((new_oid && !is_null_oid(new_oid)) ?
check_refname_format(refname, REFNAME_ALLOW_ONELEVEL) :
!refname_is_safe(refname)) {
strbuf_addf(err, _("refusing to update ref with bad name '%s'"),
refname);
return 0;
}
return 1;
}
int ref_transaction_update(struct ref_transaction *transaction,
const char *refname,
const struct object_id *new_oid,
@ -1213,21 +1235,8 @@ int ref_transaction_update(struct ref_transaction *transaction,
return -1;
}
if (!(flags & REF_SKIP_REFNAME_VERIFICATION) &&
((new_oid && !is_null_oid(new_oid)) ?
check_refname_format(refname, REFNAME_ALLOW_ONELEVEL) :
!refname_is_safe(refname))) {
strbuf_addf(err, _("refusing to update ref with bad name '%s'"),
refname);
if (!transaction_refname_valid(refname, new_oid, flags, err))
return -1;
}
if (!(flags & REF_SKIP_REFNAME_VERIFICATION) &&
is_pseudo_ref(refname)) {
strbuf_addf(err, _("refusing to update pseudoref '%s'"),
refname);
return -1;
}
if (flags & ~REF_TRANSACTION_UPDATE_ALLOWED_FLAGS)
BUG("illegal flags 0x%x passed to ref_transaction_update()", flags);