usepackage loads .sty file from texmf-dist instead of texmfhome

[Yann Salmon]

Hello,

I am forwarding here my question about the behaviour of lualatex from 
texlive 2024 (see <https://tex.stackexchange.com/questions/725139>).

I have a custom piton.sty in my texmfhome, and kpsewhich sees it :

$ kpsewhich -a piton.sty
/home/yann/texmf/tex/latex/chato/piton.sty
/opt/yann/texlive/texmf-dist/tex/lualatex/piton/piton.sty


However \usepackage{piton} loads the file from texmf-dist (when run with 
lualatex).

This does not happen with other packages, eg. tabularray (file gets 
loaded from texmfhome if present). Of course if I rename the file, eg. 
piton2.sty, \usepackage{piton2} gets it from texmfhome.

tlmgr conf says

=========================== kpathsea variables ===========================
ENCFONTS=.:{{}/home/yann/.texlive2024/texmf-config,/home/yann/.texlive2024/texmf-var,/home/yann/texmf,!!/opt/yann/texlive/texmf-local,!!/opt/yann/texlive/texmf-config,!!/opt/yann/texlive/texmf-var,!!/opt/yann/texlive/texmf-dist}/fonts/enc//
SYSTEXMF=/opt/yann/texlive/texmf-var:/opt/yann/texlive/texmf-local:/opt/yann/texlive/texmf-dist
TEXCONFIG={{}/home/yann/.texlive2024/texmf-config,/home/yann/.texlive2024/texmf-var,/home/yann/texmf,!!/opt/yann/texlive/texmf-local,!!/opt/yann/texlive/texmf-config,!!/opt/yann/texlive/texmf-var,!!/opt/yann/texlive/texmf-dist}/dvips//
TEXFONTMAPS=.:{{}/home/yann/.texlive2024/texmf-config,/home/yann/.texlive2024/texmf-var,/home/yann/texmf,!!/opt/yann/texlive/texmf-local,!!/opt/yann/texlive/texmf-config,!!/opt/yann/texlive/texmf-var,!!/opt/yann/texlive/texmf-dist}/fonts/map/{kpsewhich,pdftex,dvips,}//
TEXMF={{}/home/yann/.texlive2024/texmf-config,/home/yann/.texlive2024/texmf-var,/home/yann/texmf,!!/opt/yann/texlive/texmf-local,!!/opt/yann/texlive/texmf-config,!!/opt/yann/texlive/texmf-var,!!/opt/yann/texlive/texmf-dist}
TEXMFCONFIG=/home/yann/.texlive2024/texmf-config
TEXMFDBS={!!/opt/yann/texlive/texmf-local,!!/opt/yann/texlive/texmf-config,!!/opt/yann/texlive/texmf-var,!!/opt/yann/texlive/texmf-dist}
TEXMFDIST=/opt/yann/texlive/texmf-dist
TEXMFHOME=/home/yann/texmf
TEXMFLOCAL=/opt/yann/texlive/texmf-local
TEXMFMAIN=/opt/yann/texlive/texmf-dist
TEXMFSYSCONFIG=/opt/yann/texlive/texmf-config
TEXMFSYSVAR=/opt/yann/texlive/texmf-var
TEXMFVAR=/home/yann/.texlive2024/texmf-var
TEXPSHEADERS=.:{{}/home/yann/.texlive2024/texmf-config,/home/yann/.texlive2024/texmf-var,/home/yann/texmf,!!/opt/yann/texlive/texmf-local,!!/opt/yann/texlive/texmf-config,!!/opt/yann/texlive/texmf-var,!!/opt/yann/texlive/texmf-dist}/{dvips,fonts/{enc,type1,type42,type3}}//
VARTEXFONTS=/home/yann/.texlive2024/texmf-var/fonts
WEB2C={{}/home/yann/.texlive2024/texmf-config,/home/yann/.texlive2024/texmf-var,/home/yann/texmf,!!/opt/yann/texlive/texmf-local,!!/opt/yann/texlive/texmf-config,!!/opt/yann/texlive/texmf-var,!!/opt/yann/texlive/texmf-dist}/web2c
==== kpathsea variables from environment only (ok if no output here) ====


and kpsewhich --var-value TEXINPUTS says

.:{{}/home/yann/.texlive2024/texmf-config,/home/yann/.texlive2024/texmf-var,/home/yann/texmf,!!/opt/yann/texlive/texmf-local,!!/opt/yann/texlive/texmf-config,!!/opt/yann/texlive/texmf-var,!!/opt/yann/texlive/texmf-dist}/tex/{kpsewhich,generic,latex,}//


Note that the same discrepancy happens with lua's require : despite what 
the documentation claims in section 4.2.2, require("piton") will load 
piton.lua from /opt/yann/texlive/texmf-dist/tex/lualatex/piton/piton.lua 
even though kpsewhich finds /home/yann/texmf/tex/latex/chato/piton.lua.


While there is an easy workaround (renaming the files), this behaviour 
is still bizarre. Has anyone a clue ?

-- 
Cordialement,

Yann Salmon