#!/bin/bash
# Post-installation script (run on USER'S system after installing the
# main rEFInd package)

set -e

# Remove any existing NVRAM entry for rEFInd, to avoid creating a duplicate.
ExistingEntry=`efibootmgr | grep "rEFInd Boot Manager" | cut -c 5-8`
if [[ -n $ExistingEntry ]] ; then
   efibootmgr --bootnum $ExistingEntry --delete-bootnum &> /dev/null
fi

cd /usr/share/refind

if [[ -f /sys/firmware/efi/vars/SecureBoot-8be4df61-93ca-11d2-aa0d-00e098032b8c/data ]] ; then
   IsSecureBoot=`od -An -t u1 /sys/firmware/efi/vars/SecureBoot-8be4df61-93ca-11d2-aa0d-00e098032b8c/data | tr -d '[[:space:]]'`
else
   IsSecureBoot="0"
fi
# Note: Two find operations for ShimFile favors shim over PreLoader -- if both are
# present, the script uses shim rather than PreLoader.
declare ShimFile=`find /boot -name shim\.efi -o -name shimx64\.efi -o -name PreLoader\.efi 2> /dev/null | head -n 1`
if [[ ! -n $ShimFile ]] ; then
   declare ShimFile=`find /boot -name PreLoader\.efi 2> /dev/null | head -n 1`
fi
declare SBSign=`which sbsign 2> /dev/null`
declare OpenSSL=`which openssl 2> /dev/null`

# Run the rEFInd installation script. Do so with the --shim option
# if Secure Boot mode is suspected and if a shim program can be
# found, or without it if not. If a shim installation is attempted
# and the sbsign and openssl programs can be found, do the install
# using a local signing key. Note that this option is undesirable
# for a distribution, since it would then require the user to
# enroll an extra MOK. I'm including it here because I'm NOT a
# distribution maintainer, and I want to encourage users to use
# their own local keys.
if [[ $IsSecureBoot == "1" && -n $ShimFile ]] ; then
   if [[ -n $SBSign && -n $OpenSSL ]] ; then
      ./refind-install --shim $ShimFile --localkeys --yes
   else
      ./refind-install --shim $ShimFile --yes
   fi
else
   if [[ -n $SBSign && -n $OpenSSL ]] ; then
      ./refind-install --localkeys --yes
   else
      ./refind-install --yes
   fi
fi