Git SSH key from environmental variable

setup_git_ssh.sh

#!/usr/bin/env bash

# Init .ssh dir and expand $SSH_KEY
mkdir -p ~/.ssh
echo -e "${SSH_KEY//_/\\n}" > ~/.ssh/id_rsa
chmod og-rwx ~/.ssh/id_rsa

# Uncomment to debug
# ls -la ~/.ssh
# cat ~/.ssh/id_rsa

# Add host keys, comment out if not needed
ssh-keyscan -H github.com >> ~/.ssh/known_hosts
ssh-keyscan -H bitbucket.org >> ~/.ssh/known_hosts