Conference Notes for 2025 08 05

Lmod Zoom Meeting August 5th, 2025

• Q/A
• Big Cache update
  • Improvements in dependency checking
  • Not Rebuilding Cache after every dependent load
  • I voting not to having store the contents in spider cache.
  • Speed improvement have been worth this effort
• Issue #780: Not rebuilding spider cache every time after dependent load causes a problem
  • I found the fix yesterday!!!
• Issue #704 and PR #784: Nushell support added on main branch
  • Nushell support a better quoting string pattern: r#'string'# where the number of '#' can vary: r###'string'###. This is a safer way to quote strings.
  • When regression testing, Lmod now uses a Lua program instead of sed.
  • The output of Lmod (stderr and stdout) are converted to be path independent by replacing paths to generic names.
  • Different Shells: nu, rc, fish have different ways of reporting path like variables
  • It got to difficult to handle each with on sed script
  • The new script now takes the type of shell.
• Issue #778: Better support for N/V/V (name/version/version)
  • This issue required a great deal of re-understanding the N/V/V code
  • Requestor had module tree like:

foo
├── .version
├── 1.0.lua
└── variant
    ├── 1.0.lua
    ├── another
    │   └── 1.0.lua
    └── b
        └── 2.0.lua

• Plan to release the next version as Lmod 9.0!!
• A question about using environment variables in modules came up.

      setenv("ACME_DIR", "/path/to/acme")
      setenv("ACME_BIN", pathJoin(os.getenv("ACME_DIR"),"bin"))

• This won't work when unloading as ACME_DIR has no value for the second seetenv
• Instead use:

      local acme_dir = "/path/to/acme"
      setenv("ACME_DIR", acme_dir)
      setenv("ACME_BIN", pathJoin(acme_dir,"bin"))

• This question has been answered in an update to the FAQ section of lmod.readthedocs.io

Next meeting September 9th (Not Sept. 2nd)