work around failing sanity check while installing CUDA under host_inj…

…ections

scripts/gpu_support/nvidia/install_cuda_host_injections.sh

@@ -186,6 +186,24 @@ else
     fatal_error "${error}"
   fi
 
+  # need to temporarily overwrite arch-specific SitePackage.lua or installation
+  # might fail in sanity check
+  mkdir -p ${cuda_install_parent}/.lmod
+  if [ -f ${cuda_install_parent}/.lmod/SitePackage.lua ]; then
+    mv ${cuda_install_parent}/.lmod/SitePackage.lua bkup-xyz-SitePackage.lua
+  fi
+  cat <<EOF > ${cuda_install_parent}/.lmod/SitePackage.lua
+require("strict")
+local hook = require("Hook")
+local open = io.open
+
+function arch_specific_load_hook(t)
+    LmodMessage("Ignoring ${EESSI_SOFTWARE_PATH}/.lmod/SitePackage.lua to allow for installing CUDA/12.1.1 under host_injections")
+end
+
+hook.register("load", arch_specific_load_hook)
+EOF
+
   # We need the --rebuild option, as the CUDA module may or may not be on the
   # `MODULEPATH` yet. Even if it is, we still want to redo this installation
   # since it will provide the symlinked targets for the parts of the CUDA
@@ -199,6 +217,12 @@ else
   # shellcheck disable=SC2086  # Intended splitting of extra_args
   eb --prefix="$tmpdir" ${extra_args} --accept-eula-for=CUDA --hooks="$tmpdir"/none.py --installpath="${cuda_install_parent}"/ "${cuda_easyconfig}"
   ret=$?
+
+  # restore original arch-specific SitePackage.lua if any was present
+  if [ -f bkup-xyz-SitePackage.lua ]; then
+    mv bkup-xyz-SitePackage.lua ${cuda_install_parent}/.lmod/SitePackage.lua
+  fi
+
   if [ $ret -ne 0 ]; then
     eb_last_log=$(unset EB_VERBOSE; eb --last-log)
     cp -a ${eb_last_log} .