Re: Texinfo - manual line breaks in URLs?

[Michael Käppler]

Am 17.06.2020 um 16:44 schrieb David Kastrup:
> Michael Käppler <xmichael-k@web.de> writes:
>
> > Am 11.06.2020 um 15:22 schrieb Werner LEMBERG:
> > > > I can prepare a version of the docs with all occurences of '@/'
> > > > removed and '@urefbreakstyle before' set, so that everyone can
> > > > compare and build an opinion on this.
> > > Great, thanks in advance.  I suggest that you use the `texinfo.tex`
> > > file directly from the 'texinfo' git repository so that we test the
> > > most recent version.
> > This turned out to be difficult.
> > As a first step I tried to upgrade texinfo.tex to current master
> > of the official Texinfo git repo. This broke 'make doc'
> > with a XeTeX error, handed over by 'texi2pdf' with the pretty
> > useless message: "XeTeX exited with bad exit status"
> > This happened just after finishing the first XeTeX pass.
> >
> > I appended various options to texi2pdf to make the output
> > more verbose, but I did not get useful output regarding
> > the XeTeX termination.
> >
> > Bisecting yielded that the first texinfo commit that introduced
> > the error is
> > http://git.savannah.gnu.org/cgit/texinfo.git/commit/?id=aa18f519e091b6ada0fb2b0a65a51880031d5014
> Uh oh.  This looks like it introduces (modifies?) a command named
> @seealso but it would appear that we define our own version of it.
Yes, that is the problem with the most recent texinfo.tex.
Regarding the missing index I did a bit of research. It is clear
that something changed with
 
http://git.savannah.gnu.org/cgit/texinfo.git/commit/?id=2405caa6c7ab01d888899af56aa056b1e77485ba
regarding index handling but I do not understand the TeX syntax to
figure out how it did exactly change.
What I do understand is that the index entries, e.g. from learning.ky
that I tested are now
like @index{foo}, not \index{foo} as previously.

All following steps were tried with texinfo.tex from
http://git.savannah.gnu.org/cgit/texinfo.git/commit/?id=2405caa6c7ab01d888899af56aa056b1e77485ba

I can reproduce the missing index on top of a doc build if I compile
manually with texi2pdf
cd ~/lilypond/build/Documentation/out-www
rm learning.{aux,cp,cps,dep,ky,kys,log,pdf,pdfmark,tmp.*,toc}
PDFTEX=~/lilypond/scripts/build/xetex-with-options.sh
TEXINPUTS=~/lilypond/tex:: texi2pdf -V learning.texi

However, with manual xetex/texindex steps the index was generated fine:
XETEX=~/lilypond/scripts/build/xetex-with-options.sh
$XETEX learning.texi
texindex learning.??
$XETEX learning.texi
texindex learning.??
$XETEX learning.texi

as described in
https://www.gnu.org/software/texinfo/manual/texinfo/html_node/Format-with-tex_002ftexindex.html#Format-with-tex_002ftexindex

What seems most likely to me is that the indices are generated
correctly, but texi2pdf refuses to generate
the sorted versions.
If I call texi2pdf --debug I do not see any invocations of 'texindex'.
May it be that texi2pdf does not call texindex but use an inlined
sorting mechanism that
cannot cope with @index, only \index? I can try if updating texi2pdf
cures the problem.

Cheers,
Michael