#!/bin/bash
[ "$1" == "-h" ] && echo "install-runc.sh install|update|remove|restart|scripts|reinstall" && exit 1

SERVICE_NAME=""
SCRIPTS_DEPLOY_PATH=""

[ -r "env-runc" ] && . ./env-runc
[ -r "common.sh" ] && . ./common.sh

ARCH="$(uname -m | sed -e 's/x86_64/amd64/' -e 's/\(arm\)\(64\)\?.*/\1\2/' -e 's/aarch64$/arm64/')"
RUNC_VERSION="${RUNC_VERSION:-1.1.15}"
RUNC_URL="https://github.com/opencontainers/runc/releases/download/v${RUNC_VERSION}/runc.${ARCH}"
CMD_TSK=${CMD_TSK:-${1:-install}}
export LC_CTYPE=C.UTF-8 LANG=C.UTF-8

_update_binary() {
  [ -z "$RUNC_VERSION" ] && return 1
  local curr_vers has_runc
  has_runc=$(type runc 2>/dev/null)
  [ -n "$has_runc" ] && curr_vers=$(runc --version 2>/dev/null | grep "^runc version" | awk '{print $3}')
  [ "$curr_vers" == "$RUNC_VERSION" ] && return 0
  if ! curl -fsSL "$RUNC_URL" -o runc; then
    echo "error downloading runc"; return 1
  fi
  chmod +x runc && sudo mv runc /usr/local/bin/runc
  [ -f "/usr/bin/runc" ] && sudo mv /usr/bin/runc /usr/bin/_runc
  return 0
}

_config_runc() {
  for mod in overlay br_netfilter; do
    sudo grep -q "^${mod}" /etc/modules-load.d/runc.conf 2>/dev/null \
      || echo "$mod" | sudo tee -a /etc/modules-load.d/runc.conf >/dev/null
  done
}

case "$CMD_TSK" in
  reinstall)
    sudo rm -f /usr/local/bin/runc ;&
  install)
    _update_binary || { echo "error runc install"; exit 1; }
    _config_runc
    ;;
  update)   _common_update ;;
  scripts)  _common_deploy_scripts ;;
  config)   _config_runc ;;
  restart)  _common_service_restart ;;
  remove)   sudo rm -f /usr/local/bin/runc ;;
  delete)
    sudo rm -f /usr/local/bin/runc /usr/bin/_runc
    sudo rm -f /etc/modules-load.d/runc.conf
    ;;
esac