[tex-live] luatex + cwebmac

[Ingo Krabbe]

On Sun, Nov 14, 2010 at 11:39:11AM +0000, Robin Fairbairns wrote:
> Ingo Krabbe <ikrabbe.ask at gmail.com> wrote:
> 
> > that leads to
> > 
> > 	$ kpsewhich cwebmac.tex
> > 	/home/ingo/texmf/tex/local/askgeneral/cwebmac.tex
> > 
> > which is what I expected.
> 
> however, not what i would expect; i assumed your HOME variable was the
> equivalent of "~"; it appears from this that it's "~/texmf"

That's true, its $HOME/texmf or ~/texmf

> 
> so kpsewhich is assuming you're looking for a file to run "tex" on.

I assumed that it works just as TEXINPUTS variable, since

===== excerpt from texmf.cnf ====
% TEXINPUTS is for TeX input files -- i.e., anything to be found by \input
% or \openin, including .sty, .eps, etc.  We specify paths for all known
% formats, past or present.  Not all of them are built these days.

% Plain TeX.  Have the command tex check all directories as a last
% resort, we may have plain-compatible stuff anywhere.
TEXINPUTS.tex           = .;$TEXMF/tex/{plain,generic,}//
=================================

suggests (having
TEXMF = {$TEXMFCONFIG,$TEXMFVAR,$TEXMFHOME,!!$TEXMFSYSCONFIG,!!$TEXMFSYSVAR,!!$TEXMFMAIN,!!$TEXMFLOCAL,!!$TEXMFDIST}
)

the rule that

	$TEXMF/tex/plain

gets precedence over any other

	$TEXMF/tex/*.

I also found the reason that kpsewhich cwebmac.tex does not find the
plain file, as the searchpath is tuned in by

kpsewhich -progname tex    or    kpsewhich -progname luatex 

which comes more clear using

kpsewhich -progname tex -show-path cwebmac.tex | tr ':' '\n'

that shows the whole path order how TEXINPUTS is constructed.  Actually
I think there should be no difference in 'looking for a file to run
"tex" on' and searching a file used in an \input statement within the
document source.  Both use cases should be affected by TEXINPUTS in the
same way and I think they are.

Thank you for your help in solving this problem.

> 
> > When I now use luatex on some file, converted with cweave I get:
> > 
> > 	$ luatex scan_portage_dir.tex | head
> > 	This is LuaTeX, Version beta-0.60.2-2010071218 (TeX Live 2010)
> > 	(rev 3736)
> > 	 restricted \write18 enabled.
> > 	 (./scan_portage_dir.tex
> > 	 (/usr/share/texlive/2010/texmf-dist/tex/plain/cweb/cwebmac.tex
> > 	[...]
> > 
> > But this is no luatex problem, it seems a global installation problem:
> > 
> > 	$ tex scan_portage_dir.tex | head
> > 	This is TeX, Version 3.1415926 (TeX Live 2010)
> > 	 encTeX v. Jun. 2004, reencoding enabled.
> > 	 (./scan_portage_dir.tex
> > 	 (/usr/share/texlive/2010/texmf-dist/tex/plain/cweb/cwebmac.tex)
> > 	[...]
> > 
> > Now I'm confused.  What's going wrong here?

Now I'm not confused anymore, sun's shining again :)

bye ingo