Conference notes for 2021 12 07 - TACC/Lmod GitHub Wiki

Agenda for Lmod Monthly Zoom Meeting on 2021-12-07

Robert McLay (TACC)
Kenneth Hoste (HPC-UGent)
Ward Poelmans (Vrije Universiteit Brussel)
Kurt Lust (UAntwerpen + LUMI User Support Team)
Bill Barth (TACC)
- personally responsible for module hierarchy concept and dragging Robert to TACC!
Amit Ruhela (TACC)
Lev Gorenstein (Purdue University)
Junjie Li (TACC)
Raj Ayyampalayam (University of Georgia)

see https://github.com/TACC/Lmod/blob/master/my_docs/21/lmod_zoom_mtg_2021_12_07/presentation.pdf
settarg is short for "set target" (?)
module that controls value of $TARG and makes related changes in environment
if $LMOD_SETTARG_CMD is not defined, the module function falls back to using :, which is a no-op in bash, tcsh, zsh
relative paths are added to $PATH because the shell re-evaluates those every time a command is run (rather than 'caching' paths to commands for absolute path entries in $PATH)
example for how to use $TARG & co: contrib/settag/make_example in Lmod repository
settarg behaviour can be customized using .settarg.lua
see also https://lmod.readthedocs.io/en/latest/310_settarg.html

latest Lmod 8.5.x (8.5.29) is now released as Lmod 8.6.0
to let sites control which paths are filtered by spider (rather than hardcoded paths)
- see https://github.com/TACC/Lmod/blob/5d5bf13bfe723db9450fe01358ac9ca88f0898a2/src/StandardPackage.lua#L112
- only relevant for sites using reverse map (path of binary to module file)

new in Lmod 8.6
Robert tested this best he could, bug reports welcome!
some issues were mentioned with OpenFOAM's $FOAM_BASH script
- but no actual bug report with more details was sent to Robert...
sh_2_modulefile was also improved (but still static, can't deal with dynamic stuff like resolving $HOME)

Tue Jan 11th 2022, 15:30 UTC
- usually first Tuesday of the month, next meeting in Jan'22 will be an exception