Re: [PATCH v2 5/5] refs/debug: trim trailing LF from reflog message
From: Junio C Hamano <hidden>
Date: 2021-11-29 19:22:08
Han-Wen Nienhuys [off-list ref] writes:
On Fri, Nov 26, 2021 at 9:16 AM Junio C Hamano [off-list ref] wrote:quoted
The API promises to have only LF, not CRLF, at the end, so strbuf_trim_trailing_newline() is a bit overkill (and if payload happened to end with CR, we would lose it).it would be best if there was a way to escape characters (ie. "\n" => "\\n"). Do we have a function for that?
Mere escaping would not work in a backward compatible way, without a
trick. It was envisioned that we probably could encode *and* signal
the fact that the message is encoded by appending a trailing SP at
the end of the message. See the log message of 523fa69c (reflog:
cleanse messages in the refs.c layer, 2020-07-10) for details.
Having said that, that is about introducing a whole new reflog
message format (whose use is signalled by the trailing SP), and I
would prefer it to happen
(1) after we integrate with reftable, and
(2) implemented as an option in the normalize_reflog_message()
function, so that no ref backends has to worry about it.
outside this topic.
I beg to differ - despite this being fewer lines of code, I think pointer arithmetic is best avoided if possible.
I think repeated allocation and deallocation is best avoided, and that is why I recommended it. I do not see anything to fear in poiter arithmetic, as long as it is done clearly (e.g. in a narrow scope) and correctly. If trace_printf() does not allow counted bytes "%.*s", the whole discussion is moot; I didn't go back to check.