adduser-from-gh.sh

#!/usr/bin/env bash

###
# Add User with SSH KeyAuth
#

# set -x
set -ue -o pipefail
export LC_ALL=C

function add-user() {
    local github=$1
    local name=$2
    sudo adduser "$name" --gecos "" --disabled-password
    sudo passwd -d "$name"
    sudo mkdir "/home/$name/.ssh"
    sudo chown "$name:$name" "/home/$name/.ssh"
    sudo chmod 0700 "/home/$name/.ssh"
    curl https://github.com/"$github".keys | sudo tee -a "/home/$name/.ssh/authorized_keys"
    sudo chown "$name:$name" "/home/$name/.ssh/authorized_keys"
    sudo chmod 0600 "/home/$name/.ssh/authorized_keys"
    sudo usermod -aG sudo "$name"
    sudo usermod -aG docker "$name"
}

function main() {
    if [ -p /dev/stdin ]; then
        local col1
        local col2
        while IFS=' ' read -r col1 col2; do
            if [[ -n $col1 && -n $col2 ]]; then
                add-user "$col1" "$col2"
            fi
        done
    else
        echo "No input given!"
    fi
}

main "$@"