app/make-caddyfile.sh

#!/bin/bash

# this script generates the load-balancer
# config for the Caddy server.

# it depends on apps.config which should define:
# ROOT_DOMAIN - the root domain for all apps
# APP_CONFIGS - app-subdomain pairs, configured via a comma, like:
#   app1,subdomain1 app2,subdomain2 app3,subdomain3
# full example:
#   ROOT_DOMAIN=nassella.cc
#   APP_CONFIGS="app1,subdomain1 app2,subdomain2 app3,subdomain3"

set -e

. $1 # source the apps.config file with then env vars

host_admin_password_encoded=`echo "$HOST_ADMIN_PASSWORD" | docker run --rm -i caddy:2 caddy hash-password`


read -r -a APP_CONFIGS <<< "$APP_CONFIGS"
APP_CONFIGS+=('lb,root')

echo "ROOT_DOMAIN=\"${ROOT_DOMAIN}\""

for config_string in ${APP_CONFIGS[@]}; do
    IFS=','
    read -r -a config <<< "$config_string"

    app=${config[0]}
    subdomain=${config[1]}

    echo "${app//-/_}_SUBDOMAIN=\"${subdomain}\""
done