benchmark: Add script to bootstrap a Nix environment

benchmark/bootstrap-nix-environment.sh

+#!/bin/bash
+
+# This script will bootstrap a Nix environment under /scratch when executed directly or when submitted via the SGE system.
+# Execute by calling the script or submit this script via `qsub -M "your_email@students.uu.nl" bootstrap-nix-environment.sh`.
+
+# Magic SGE options:
+
+# Job name
+#$ -N bootstrap-nix-environment
+
+# Execute via Bash in the current directory
+#$ -S /bin/bash
+#$ -cwd
+
+# Send mail on job start, end and suspension (requires passing -M when submitting)
+#$ -m bes
+
+# Bash "strict mode": terminate if a command fails or an undefined variable is used.
+# Also enable verbose debug logging of which commands are run.
+set -euxo pipefail
+
+# Make scratch directory to play around in.
+scratch_dir=/scratch/${USER}
+
+mkdir -p ${scratch_dir}/nix-store
+cd $scratch_dir
+
+# Download PRoot, verify and mark file executable
+proot_url="https://gitlab.com/proot/proot/-/jobs/710225783/artifacts/file/dist/proot"
+proot_sha256_checksum="1a2576c66f363117d8ee7ff5f1e0e4e5b217c59cc975164ffd8bbcc37155aa41"
+
+curl -o proot $proot_url
+sha256sum --check --strict <<< "${proot_sha256_checksum}  proot"
+
+chmod +x proot
+
+# Download Nix installer
+nix_release_url="https://releases.nixos.org/nix/nix-2.3.7/nix-2.3.7-x86_64-linux.tar.xz"
+nix_sha256_checksum="d77c1fd1d6bc597bce390455313e5e42b1bc3d5752994059eed69d43588d022b"
+nix_release_name="nix-2.3.7-x86_64-linux"
+nix_release_tarball="${nix_release_name}.tar.xz"
+
+curl -O $nix_release_url
+sha256sum --check --strict <<< "${nix_sha256_checksum}  ${nix_release_tarball}"
+
+# Extract Nix install package
+tar xf $nix_release_tarball
+cd $nix_release_name
+
+# PROOT_NO_SECCOMP=1 is needed to work on Gemini
+export PROOT_NO_SECCOMP=1
+
+# Execute installer in PRoot environment
+$scratch_dir/proot -b $scratch_dir/nix-store:/nix ./install --no-daemon --no-channel-add