Re: [PATCH v8 14/44] replace.c: use the ref transaction functions for updates

> Ronnie Sahlberg wrote:
>
>> --- a/builtin/replace.c
>> +++ b/builtin/replace.c
> [...]
>> @@ -156,11 +157,12 @@ static int replace_object_sha1(const char *object_ref,
>>       else if (!force)
>>               die("replace ref '%s' already exists", ref);
>>
>> -     lock = lock_any_ref_for_update(ref, prev, 0, NULL);
>> -     if (!lock)
>> -             die("%s: cannot lock the ref", ref);
>> -     if (write_ref_sha1(lock, repl, NULL) < 0)
>> -             die("%s: cannot update the ref", ref);
>> +     transaction = ref_transaction_begin();
>> +     if (!transaction ||
>> +         ref_transaction_update(transaction, ref, repl, prev,
>> +                                0, !is_null_sha1(prev)) ||
>> +         ref_transaction_commit(transaction, NULL, &err))
>> +             die("%s: failed to replace ref: %s", ref, err.buf);
>
> This would write
>
>         fatal: refs/replace/09c779943364d893c190066c385e6112af421db3: failed to replace ref: Cannot lock the ref 'refs/replace/09c779943364d893c190066c385e6112af421db3'.
>
> Perhaps something like
>
>         $ git replace foo bar
>         fatal: replace foo: Cannot lock the ref 'refs/replace/09c779943364d893c190066c385e6112af421db3'.
>
> would make sense (die("replace %s: %s", object_ref, err.buf)).  Plain
>
>         $ git replace foo bar
>         fatal: Cannot lock the ref 'refs/replace/09c779943364d893c190066c385e6112af421db3'.
>
> also seems fine (die("%s", err.buf)).