Thanks for reviewing my code and points. :)
Fixed in this attached patch.

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On Sun, Aug 16, 2020 at 5:54 PM Nicolas Goaziou <mail@nicolasgoaziou.fr>
wrote:

> Hello,
>
> "numbchild@gmail.com" <numbchild@gmail.com> writes:
>
> > With this patch, ol-man.el link type can be a link like this:
> > ```org
> > [[man:grep::--extended-regexp][grep --extended-regexp]]
> > ```
> > Occur will auto search "--extended-regexp" string in man page buffer.
>
> Thanks.
>
> > +PATH should be a topic that can be thrown at the man command.
> > +If PATH contains extra ::STRING which will use `occur' to search
> > +matched strings in man buffer."
>
> > +  (string-match "\\(.*?\\)\\(?:::\\(.*\\)\\)?$" path)
> > +  (let* ((command (match-string 1 path))
> > +      (search (match-string 2 path)))
> > +    (funcall org-man-command command)
> > +    (with-current-buffer (concat "*Man " command "*")
>
> This should only be called if search is non-empty.
>
> > +      (occur search))))
>
> Why occur? Org uses `search-forward' for [[foo.org::text]] text links,
> and uses `occur' with [[foo.org::/text/]] links.
>
> Wouldn't it be more idiomatic to use a regular text search here?
>
> Regards,
> --
> Nicolas Goaziou
>