setup.sh

#!/bin/bash

set -eu

#exit if not run by root
if [ "$EUID" -ne 0 ]
  then echo "Please run as root"
  exit
fi

#getting some environment vars
source /etc/lsb-release

# setting the location of the ansible playbook repository
export GITREPO="https://github.com/tna76874/hdhweg-homeschooling-stack.git"
export REPODIR="/root/hdhweg-homeschooling-stack"
export EXE="/usr/local/bin/setup.sh"
export SCRIPT=$(readlink -f "$0")

###### Some functions
# installing requirements
installing_requirements() {
    echo -e "... update system sources, install ansible and git ... [this could take a few minutes now, depending on your internet connection]"
    sudo apt update > /dev/null 2>&1
    sudo apt install software-properties-common -y > /dev/null 2>&1
    sudo apt-add-repository universe > /dev/null 2>&1
    sudo apt-add-repository multiverse > /dev/null 2>&1
    if [ "$DISTRIB_CODENAME" = "bionic" ]
    then
        sudo apt-add-repository --yes --update ppa:ansible/ansible > /dev/null 2>&1
    fi
    sudo apt update > /dev/null 2>&1
    sudo apt install nano git ansible -y > /dev/null 2>&1
}

# pulling repo and updating content
pull_repo() {
    # pulling latest changes
    cd ${REPODIR}
    sudo git -C ${REPODIR} pull  > /dev/null 2>&1 && echo "... updated git repo ..."

    # install galaxy roles
    cd ${REPODIR}
    ansible-galaxy install -r requirements.yml --force > /dev/null 2>&1 && echo "... updated galaxy packages ..."
}

#perform restic backup
function restic_backup() {
  export RESTIC_REPOSITORY="/restic/backup"
  export RESTIC_PASSWORD_FILE="/root/RESTIC_PASSWORD"

  /snap/bin/restic "$@"
}
export -f restic_backup

#Usage print
usage() {
    echo "Usage: $0 [-t TAG] [-b]" >&2
    echo "
    OPTIONS
    -t [TAG],     run playbook with given tag. Check README.md
    -b,           run restic backup operations. e.g. $0 -b backup /srv
   ">&2
    exit 1
}

###### Run routines

# checking for required packages
git version > /dev/null 2>&1 && ansible-playbook -h > /dev/null 2>&1 || installing_requirements

# checking if repo dir is present
if [ ! -d "$REPODIR" ]; then
    echo "Cloning repo to: $REPODIR"
    sudo git clone ${GITREPO} ${REPODIR} > /dev/null 2>&1
    sudo cp ${REPODIR}/vars.yml.example ${REPODIR}/vars.yml
    sudo cp ${REPODIR}/inventory.example ${REPODIR}/inventory
    echo -e "Edit variables now with:\nnano ${REPODIR}/vars.yml"
fi

# updating repo
pull_repo

# checking if script is deployed on system
if [ ! -f "$EXE" ]; then
    echo "Deployed system script: $EXE"
    sudo cp ${SCRIPT} ${EXE}
    sudo chmod 775 ${EXE}
fi

###### processing args

while [ $# -gt 0 ] ; do
  case $1 in
    -t | --tag | tag) cd ${REPODIR}; sudo ansible-playbook main.yml -t base,"$2" ;;
    -b | --backup | backup) sudo restic_backup "$2" ;;
    -h | --help | help) usage ;;
  esac
  shift
done