shikendon

#!/usr/bin/env bash
set -e

cat <<'END' | sudo tee /etc/yum.repos.d/epel-alonid-llvm.repo
[epel-alonid-llvm-3.9.0]
name=Copr repo for llvm-3.9.0 owned by alonid
baseurl=https://copr-be.cloud.fedoraproject.org/results/alonid/llvm-3.9.0/epel-7-$basearch/
type=rpm-md
enabled=0
gpgkey=https://copr-be.cloud.fedoraproject.org/results/alonid/llvm-3.9.0/pubkey.gpg

nickjacob

[Unit]
Description=Demonstrate Bash

[Service]
ExecStartPre=/usr/bin/bash -c "/usr/bin/systemctl set-environment MYVAR=$(( 2 + 2 ))"
ExecStart=/usr/bin/echo "2 + 2 = ${MYVAR}"