Overview page of LArSoft with SPACK

These instructions are temporary until Spack is in production and complete documentation pages are available.

The migration plan:

• Migration to spack-based builds and development before SL7 EOL
• SL7 build machines scheduled to shut-down mid-May
• Decided: Containers can be used for code that requires UPS under SL7
• Firm: No plan to support UPS under AL9.

The current spack build of LArSoft

Have Spack builds of LArSoft v09.81.00 under AL9 and SL7

To set up in AL9

• source /cvmfs/larsoft.opensciencegrid.org/spack-packages/setup-env.sh spack load larsoft/e3ryycs

To set up in SL7

• source /cvmfs/larsoft.opensciencegrid.org/spack-packages/setup-env.sh spack load larsoft/2vibnrv