Jeff King <peff@xxxxxxxx> writes:
> On Fri, Feb 22, 2013 at 02:53:48PM -0800, Junio C Hamano wrote:
>
>> > I guess we should probably issue a warning, too. Also disappointingly,
>> > git-fsck does not seem to detect this breakage at all.
>>
>> Yes for the warning,
>
> Unfortunately, a good warning is harder than I had hoped. At the point
> where we notice the problem, pp_user_info, we have very little context.
> We can say only something like:
>
> warning: malformed date in ident 'Jeff King <peff@xxxxxxxx> BOGUS'
>
> but we cannot say in which object, or even that it was a "tagger" line
> (and in some cases we do not even have an object, as in
> make_cover_letter).
As pp_user_info() is called from very few places, I do not think it
is unreasonable to add an output parameter (i.e. "unsigned *") to
let the caller know that we made a best guess given malformed input
and handle the error in the caller. The make_cover_letter() caller
may look like:
pp_user_info(&pp, NULL, &sb, committer, encoding, &errors);
if (errors & PP_CORRUPT_DATE)
warning("unparsable datestamp in '%s'", committer);
although it is unlikely to see this error in practice, given that
committer is coming from git_committer_info(0) and would have the
current timestamp.
> I also took a look at parsing routine of "cat-file -p". It's totally
> hand-rolled, separate from what "git show" does, and is not build on the
> pretty-print code at all. I wonder, though, if it actually makes sense
> to munge the date there. The commit-object pretty-printer for cat-file
> just shows the object intact. It seems weirdly inconsistent that we
> would munge tags just to rewrite the date. If you want a real
> pretty-printer, you should be using porcelain like "show".
The whole "cat-file -p" is a historical wart, aka poor-man's
"show". I do not even consider it a part of the plumbing. It is a
fair game for Porcelainisque improvement ;-)
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