#!/bin/bash

set -eu

file_env() {
   local var="$1"
   local fileVar="${var}_FILE"
   local def="${2:-}"

   if [ "${!var:-}" ] && [ "${!fileVar:-}" ]; then
      echo >&2 "error: both $var and $fileVar are set (but are exclusive)"
      exit 1
   fi
   local val="$def"
   if [ "${!var:-}" ]; then
      val="${!var}"
   elif [ "${!fileVar:-}" ]; then
      val="$(< "${!fileVar}")"
   fi
   export "$var"="$val"
   unset "$fileVar"
}

{{ if eq (env "COPY_USERS") "1" }}
cp /opt/users/passwd /etc/passwd || true
cp /opt/users/shadow /etc/shadow || true
cp /opt/users/group /etc/group || true

copy_users() {
  while true; do
    if [ /etc/passwd -nt /opt/users/passwd ]; then
      cp -uv /etc/passwd /opt/users/passwd
    else
      cp -uv /opt/users/passwd /etc/passwd 
    fi
    if [ /etc/shadow -nt /opt/users/shadow ]; then
      cp -uv /etc/shadow /opt/users/shadow
    else
      cp -uv /opt/users/shadow /etc/shadow 
    fi
    if [ /etc/group -nt /opt/users/group ]; then
      cp -uv /etc/group /opt/users/group
    else
      cp -uv /opt/users/group /etc/group 
    fi
    sleep 60
  done
}

copy_users &
{{ end }}

file_env "PASSWORD"

{{ if eq (env "OIDC_ENABLED") "1" }}
echo 'auth-openid=1' >> /etc/rstudio/rserver.conf
echo 'auth-openid-issuer={{ env "OIDC_ISSUER_URL"}}' >> /etc/rstudio/rserver.conf
echo 'auth-openid-base-uri=https://{{ env "DOMAIN" }}' >> /etc/rstudio/rserver.conf
{{ end }}

{{ if eq (env "KEYCLOAK_ENABLED") "1" }}
apt update --allow-releaseinfo-change
apt install -y libpam-script
mkdir -p /opt/pam-exec-oauth2/
wget https://github.com/WASHNote/pam-exec-oauth2/releases/download/v0.0.1/pam-exec-oauth2 -O /opt/pam-exec-oauth2/pam-exec-oauth2
chmod +x /opt/pam-exec-oauth2/pam-exec-oauth2
echo 'auth requisite pam_exec.so log=/tmp/pam_exec.log expose_authtok /opt/pam-exec-oauth2/pam-exec-oauth2 --verbose' > /etc/pam.d/common-auth
echo 'auth requisite pam_script.so' >> /etc/pam.d/common-auth
{{ end }}

{{ if eq (env "MSSQL_ENABLED") "1" }}
export ACCEPT_EULA=Y

apt --allow-releaseinfo-change update && apt install -yq curl gpg libglpk40

curl https://packages.microsoft.com/keys/microsoft.asc | apt-key add -

curl https://packages.microsoft.com/config/ubuntu/20.04/prod.list > /etc/apt/sources.list.d/mssql-release.list

apt update && apt -o Dpkg::Options::="--force-overwrite" install -yq msodbcsql17 mssql-tools
{{ end }}

locale-gen {{ env "DEFAULT_LOCALES" }}

exec "$@"