Jonathan Tan <jonathantanmy@xxxxxxxxxx> writes:
>> * rs/c-auto-resets-attributes:
>> pretty: avoid adding reset for %C(auto) if output is empty
>>
>> And neither of the two colon containing line remotely resembles how
>> a typical RFC-822 header is formatted. So that may serve as a hint
>> to how we can tighten it without introducing false negative.
>
> The only "offending" character is the space (according to RFC 822),
> but that sounds like a good rule to have.
I suspect that we should be willing to deviate from the letter of
RFC to reject misidentification. I saw things like
Thanks to: Jonathan Tan <jt@xxxxxxx>
Signed-off-by: A U Thor <au@xxxxx>
in the wild (notice the SP between Thanks and to), for example.
Rejecting leading whitespace as a line that does *not* start the
header (hence its colon does not count) may be a good compromise.
> I think that "Signed-off-by:" is not guaranteed to be
> present.
But do we really care about that case where there is no S-o-b:? I
personally do not think so.
> Defining a trailer line as "a line starting with a token,
> then optional whitespace, then separator", maybe the following rule:
> - at least one trailer line generated by Git ("(cherry picked by" or
> "Signed-off-by") or configured in the "trailer" section in gitconfig
> OR
> - at least 3/4 logical trailer lines (I'm wondering if this should be
> 100% trailer lines)
I'd strongly suggest turning that OR to AND. We will not safely be
able to write a commit log message that describes how S-o-b lines
are handled in its last paragraph otherwise.
I do not care too deeply about 3/4, but I meant to allow 75% cruft
but no more than that, and the fact that the threashold is set at
way more than 50% is important. IOW, if you have
Ordinary log message here...
S-o-b: A U Thor <au@xxxxx>
[a short description that is typically a single liner
in the real world use pattern we saw in the world, but
could overflow to become multi line cruft]
S-o-b: R E Layer <re@xxxxxx>
"last paragraph" is 5 lines long, among which 60% are cruft that is
below the 75% threshold, and "am -s" can still add the S-o-b of the
committer at the end of that existing last paragraph. Making it too
strict would raise the false negative ratio.