#!/bin/bash

# This script is used to prepare yum repositories, that are given as arguments.

set -e

# DEFAULT_REPOS and SKIP_REPOS_{ENABLE,DISABLE} are intentionally undocumented,
# but might be used if we need to change this behaviour.
# Once we realize there are real use cases for using those variables, we should
# document them properly.
DEFAULT_REPOS=${DEFAULT_REPOS:-"rhel-7-server-rpms rhel-7-server-optional-rpms"}
SKIP_REPOS_ENABLE=${SKIP_REPOS_ENABLE:-false}
SKIP_REPOS_DISABLE=${SKIP_REPOS_DISABLE:-false}

function is_subscribed() {
  for f in /run/secrets/etc-pki-entitlement/*.pem ; do
    [ -e "$f" ] && return 0
    break
  done
  return 1
}

# repo files might be mounted in (read-only), better not try any write ops
ls -1 /etc/yum.repos.d/ | grep -v redhat.repo >/dev/null && SKIP_REPOS_ENABLE=true

# install yum-utils for yum-config-manager
yum install -y yum-utils

if [ "$SKIP_REPOS_DISABLE" = false ] && is_subscribed; then
  # Disable only repos that might come from subscribed host, because there
  # might be other repos provided by user or build system
  echo "Running: yum-config-manager --disable rhel-\*"
  yum-config-manager --disable rhel-\* &> /dev/null || :
fi

if [ ${SKIP_REPOS_ENABLE} = false ] && [ -n "${DEFAULT_REPOS}" -o $# -gt 0 ] ; then
  echo "Running: yum-config-manager --enable ${DEFAULT_REPOS} $@"
  yum-config-manager --enable ${DEFAULT_REPOS} "$@"
fi