deploy

#!/usr/bin/env bash


usage() {
cat << EOF
Adsfree

Fly.io based DNS app deploy script
A publicly available https://pi-hole.net on https://fly.io

Usage:
    ${0} [OPTIONS]

Options:
    --new               Launch new application using fly.toml template
    --python            Use python DNS over HTTPS relay (set by default)
    --rust              Use rust DNS over HTTPS relay
    --app APP           Application name to use for deploy. Overrides one in toml file
    --debug             Set bash 'x' option
    --help              Show help message

Examples:
    Deploy new app.
    
        ./deploy --new --app myadsfree

    Redeploy 
        
        ./deploy

Note:
    This script allocates shared ipv4 and ipv6 addresses that cost nothing
    Dedicated ipv4 address costs \$2/month
    
    Deployed services

    - DNS-over-HTTPS: https://myadsfree.fly.dev
      Free of charge as works with shared ipv4
      Test with \`dnslookup google.com https://myadsfree.fly.dev\`

    - DNS-over-TLS: tls://myadsfree.fly.dev:853 (dedicated ipv4 only)

    - Pi-hole admin: https://myadsfree.fly.dev:8443 (dedicated ipv4 only)
      To access within shared ipv4 issue \`fly proxy 8080:80\` after deployment
      then open in browser http://localhost:8080/admin
      Password is printed during the deployment
EOF
}

SCRIPT_DIR=$(realpath "$(dirname "${0}")")
PYTHON=1

while [ "${#}" -gt 0 ]; do
    case "${1}" in
        -h|--help)
            usage
            exit
            ;;

        --python)
            PYTHON=1
            unset RUST
            ;;

        --rust)
            RUST=1
            unset PYTHON
            ;;

        --app)
            shift
            APP_NAME="${1}"
            ;;

        --new)
            NEW=1
            ;;

        --debug)
            set -x
            ;;

        *)
            echo "Unreconginzed argument: ${1}"
            usage
            exit 1
            ;;
    esac
    
   shift
done


if [ -z "$(command -v fly)" ]; then
    curl -L https://fly.io/install.sh | sh
fi 

if [ -n "${PYTHON+x}" ]; then
    echo -e "\e[36mUsing python DNS over HTTPS relay\e[0m"
    DOCKER_FN=python.Dockerfile
elif [ -n "${RUST+x}" ]; then
    echo -e "\e[36mUsing rust DNS over HTTPS relay\e[0m"
    DOCKER_FN=rust.Dockerfile
else 
    usage
    exit 1
fi

pushd "${SCRIPT_DIR}" &> /dev/null

set -eEu

on_exit() {
    popd &> /dev/null
}

trap on_exit EXIT

if [ -n "${APP_NAME+x}" ]; then
    FLY_TOML_FN="${SCRIPT_DIR}/fly.toml"
    sed -i "s/app = \".*\"/app = \"${APP_NAME}\"/g" "${FLY_TOML_FN}"
fi

if [ -n "${NEW+x}" ]; then
    ADMIN_PASSWD="$(cat /dev/random | tr -dc 0-9a-zA-Z | head -n 1 -c 12)"
    yes no | fly launch --copy-config --dockerfile "${DOCKER_FN}" --path /tmp --no-deploy
    fly ips allocate-v4 --shared
    fly ips allocate-v6
    fly secrets set WEBPASSWORD="${ADMIN_PASSWD}"
    echo -e "\e[31m --> \e[36mAdmin password: ${ADMIN_PASSWD} \e[31m<--\e[0m"
fi

fly deploy --dockerfile "${DOCKER_FN}"

APP_NAME=$(grep 'app = ".*"' fly.toml | sed -E 's/app = "(.*)"/\1/g')
echo -e "\e[34mNote
    - Test with \`dnslookup google.com https://${APP_NAME}.fly.dev\`
    - If somehow doesn't work redeploy with \`./deploy\`
    - To access pi-hole admin \`fly proxy 8080:80\` then http://localhost:8080/admin 
    - For the admin password see above\e[0m"