On 13 October 2017, Kazunobu Kuriyama <[email protected]>
wrote:
> 2017-10-13 22:25 GMT+09:00 LCD 47 <[email protected]>:
[...]
> > I don't think the MANPAGER way can be salvaged without MAN_PN
> > (i.e. the problem of "man Xorg" and "man Net::DNS" can't be solved
> > reasonably without it). That's why my patch only addresses the case
> > where "man" sets $MAN_PN. That only covers some Linux systems. On
> > other systems I suggest using a wrapper script instead, that tries
> > to syntesize a $MAN_PN before running "man".
> >
>
> I didn't try addressing the issue for systems not having MAN_PN.
>
> But, according to :h manpager, it clams that it works for macOS with
>
> export MANPAGER="env MAN_PN=1 vim -M +MANPAGER -"
>
> Since macOS doesn't has MAN_PN, I have no idea as to what it is and
> what it is for, and I hadn't known about the mentioned wrapper script
> solution until you told me. True, macOS doesn't have MAN_PN, but the
> help asks to set it to 1, and I'm following the instructions...
"man-db", which is a "man" implementation used on some Linux
distributions, sets the environment variable MAN_PN to something like
"ls(1)", and passes it to programs run from $MANPAGER. To the best of
my knowledge no other "man" implementation does that.
The manual asks you to set MAN_PN to 1. If it's still 1 (as opposed
to something like "ls(1)") when Vim is run from $MANPAGER, your "man"
didn't set MAN_PN to anything useful. When that happens, Vim tries to
parse the name and the section of the man page from the first line in
the formatted page. However, said line looks something like this:
LS(1) General Commands Manual LS(1)
To get from "LS(1)" to "ls(1)" Vim uses tolower(). That breaks for
man pages such as "Xorg", or "Net::DNS". This is the problem I'm trying
to address.
[...]
> >
> > It isn't that I don't _like_ it. Your patch changes the
> > non-MAN_PN branch, it's unrelated to mine. As I said, I'm
> > suggesting the wrapper script as a possibly better solution for that
> > ("better" as in, it solves the "man Xorg" and "man Net::DNS" problem
> > I described in my first message).
>
> No, my patch actually changes the MAN_PN branch ("if MAN_PN is 1"),
> and now I can use Vim as a stand-alone man pager which can work nicely
> with both "man Xorg" and "man Net::DNS", which I think shares the same
> goal of your patch.
As I explained above, "$MAN_PN is 1" is the non-MAN_PN case.
/lcd
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