Let's make sure the EASYBUILD_INSTALLPATH is used for the disk space check. Also, make sure that dir exists to avoid strange errors that say you're out of disk space, while actually, the dir just didn't exist

Author: Caspar van Leeuwen

scripts/gpu_support/nvidia/install_cuda_and_libraries.sh

@@ -211,10 +211,14 @@ for EASYSTACK_FILE in ${TOPDIR}/easystacks/eessi-*CUDA*.yml; do
       required_space_in_tmpdir=$((required_space_in_tmpdir + ${base_storage_space}))
     fi
 
+    # Checking disk space on a non-existing folder returns a permission denied, but the error then seems to 
+    # incorrectly suggest there is insufficient disk space. Let's make sure this directory exists.
+    mkdir -p ${EASYBUILD_INSTALLPATH}
+
     # The install is pretty fat, you need lots of space for download/unpack/install
     # (~3*${base_storage_space}*1000 Bytes),
     # need to do a space check before we proceed
-    avail_space=$(df --output=avail "${EESSI_SITE_SOFTWARE_PATH}"/ | tail -n 1 | awk '{print $1}')
+    avail_space=$(df --output=avail "${EASYBUILD_INSTALLPATH}"/ | tail -n 1 | awk '{print $1}')
     min_disk_storage=$((3 * ${base_storage_space}))
     if (( avail_space < ${min_disk_storage} )); then
       fatal_error "Need at least $(echo "${min_disk_storage} / 1000000" | bc) GB disk space to install CUDA and other libraries under ${EESSI_SITE_SOFTWARE_PATH}, exiting now..."