Re: [PATCH v2 3/5] mailinfo: skip quoted CR on user's wish

["Đoàn Trần Công Danh" <congdanhqx@gmail.com>]

On 2021-05-05 13:12:12+0900, Junio C Hamano <gitster@pobox.com> wrote:
> > diff --git a/Documentation/git-mailinfo.txt b/Documentation/git-mailinfo.txt
> > index d343f040f5..c776b27515 100644
> > --- a/Documentation/git-mailinfo.txt
> > +++ b/Documentation/git-mailinfo.txt
> > @@ -9,7 +9,7 @@ git-mailinfo - Extracts patch and authorship from a single e-mail message
> >  SYNOPSIS
> >  --------
> >  [verse]
> > -'git mailinfo' [-k|-b] [-u | --encoding=<encoding> | -n] [--[no-]scissors] <msg> <patch>
> > +'git mailinfo' [-k|-b] [-u | --encoding=<encoding> | -n] [--[no-]scissors] [--quoted-cr=<action>] <msg> <patch>
> 
> This line is getting really crowded.  Perhaps it is time to do
> 
> 	'git mailinfo' [<options>] <msg> <patch>
> 
> like other Git subcommands with too many options?  Certainly it can
> be done after the dust settles from this entire series as a follow up
> clean-up patch.

Yes, I think it's time to do that clean-up.

> >  static const char mailinfo_usage[] =
> > -	"git mailinfo [-k | -b] [-m | --message-id] [-u | --encoding=<encoding> | -n] [--scissors | --no-scissors] <msg> <patch> < mail >info";
> > +	"git mailinfo [-k | -b] [-m | --message-id] [-u | --encoding=<encoding> | -n] [--scissors | --no-scissors] [--quoted-cr=<action>] <msg> <patch> < mail >info";
> 
> It is surprising that we haven't switched this to parse_options().
> It of course is outside the scope of this series, but from a cursory
> look of its option parsing loop, it looks like a trivial improvement
> to make.

And given that we also need 1/5 (otherwise, we need a new declaration
for "const char *str"), I think it would be better to turn 1/5 to the
conversion to parse_option.

> > @@ -43,7 +43,11 @@ int cmd_mailinfo(int argc, const char **argv, const char *prefix)
> >  			mi.use_scissors = 0;
> >  		else if (!strcmp(argv[1], "--no-inbody-headers"))
> >  			mi.use_inbody_headers = 0;
> > -		else
> > +		else if (skip_prefix(argv[1], "--quoted-cr=", &str)) {
> > +			mi.quoted_cr = mailinfo_parse_quoted_cr_action(str);
> > +			if (mi.quoted_cr == quoted_cr_invalid_action)
> > +				usage(mailinfo_usage);
> 
> This is not all that helpful, given that mailinfo_usage[] only says
> <action> without saying what the supported values are, and the
> message does not make it clear it was issued while looking at the
> --quoted-cr option.
> 
> At least, something like
> 
> 			if (mi.quoted_cr == quoted_cr_invalid_action)
>                         	die("--quoted-cr=%s: invalid action", str);
> 
> would be more palatable, but I wonder if mailinfo_parse_quoted_cr_action()
> should have an option to die with the list of actions it knows about
> in a message.

I tempted to remove the _invalid_action with the re-roll and always
die when it doesn't understand the actions instead.
Let's see how far I can get with that approach.

-- 
Danh