This directory contains the default initialisation script for a bash shell used to configure Lmod and use the EESSI software modules. The (bash) file eessi_environment_variables is used to set and export the full set of EESSI environment variables:

• EESSI_PREFIX: The base directory of the entire software stack.
• EESSI_EPREFIX: The location of Gentoo Prefix compatability layer (for the architecture).
• EESSI_EPREFIX_PYTHON: Path to python3 in the Gentoo Prefix layer.
• EESSI_SOFTWARE_SUBDIR: Hardware specific software subdirectory.
• EESSI_SOFTWARE_PATH: Full path to EESSI software stack.
• EESSI_MODULEPATH: Path to be added to the MODULEPATH. This can be influenced by two externally defined environment varialbes:
  • EESSI_CUSTOM_MODULEPATH: defines a fully custom directory to be added to MODULEPATH, the end user is entirely responsible for what this directory contains.
  • EESSI_MODULE_SUBDIR: EESSI may ship with a number of possible module naming schemes. This variable can be used to point to a non-default module naming scheme.

All scripts respect the environment variable EESSI_SILENT which, if defined to any value, will make them produce no (non-error) output.

The Magic_Castle subdirectory is home to the bash initialisation that we use for Magic Castle.

It also contains a wrapper for a hardware optimised EESSI Python 3 installation that is used by Magic Castle to properly configure JupyterHub.