#!/bin/bash

echo "==============================================="
echo "Pre-Install Script"
echo "*********************************"
echo "-----------------------------------------------"
echo ""

# Creates text file named '@LOG_FILENAME@'
# at the root of the target volume. This is to give the user
# a record of the installation process and also to show why
# possibly the installation process failed (even though the
# package installer ends reading 'Installation Successful').

# This script also prepares, then backs up any previous
# stage2 boot file, /Extra folder and install log if they exist.

# Find location of this script in the package installer
# so we know where all the other scripts are located.

MYLOCATION="${PWD}/${BASH_ARGV[0]}"
export MYLOCATION="${MYLOCATION%/*}"
scriptDir=$MYLOCATION


# If target volume root of current system then replace
# / with volume name.
if [ "$3" == "/" ]
then
    targetVolume="/Volumes/"$( ls -1F /Volumes | sed -n 's:@$::p' )
else
    targetVolume="$3"
fi

logName="@LOG_FILENAME@"
logFile="${targetVolume}/$logName"

# ---------------------------------------------
# Preparing Backing up of Chameleon files
# ---------------------------------------------
backupRootDir="${targetVolume}/Chameleon.Backups"
backupDir="${backupRootDir}/"$( date -j "+%F-%Hh%M" )

# Create the backup directory
mkdir -p "$backupDir"

[[ -f "$logFile" ]] && mv "$logFile" "${backupDir}/${logName}" # Backup old log file

# Setup Chameleon Log file
# by writing header and diskutil list

echo "Chameleon installer log - $( date )
Installer version: %CHAMELEONVERSION% %CHAMELEONREVISION%
======================================================" >"${logFile}"

diskutil list >>"${logFile}"
echo "======================================================" >>"${logFile}"

# ---------------------------------------------
# Backup Chameleon files
# ---------------------------------------------
echo "Backup Chameleon files" >>"${logFile}"
# Backup stage2
if [[ -f "${targetVolume}/boot" ]];then
    echo "Backup stage2 file ${targetVolume}/boot to ${backupDir}/boot" >>"${logFile}"
    cp -p "${targetVolume}/boot" "${backupDir}/boot"
fi
# Backup /Extra directory
if [[ -d "${targetVolume}/Extra" ]];then
    echo "Backing up ${targetVolume}/Extra folder to ${backupDir}/Extra" >>"${logFile}"
    cp -pR "${targetVolume}/Extra" "${backupDir}/Extra"
fi

chflags -R nohidden "$backupDir" # Remove the invisible flag of files in the backups

find "${backupRootDir}" -type d -depth -empty -exec rmdir {} \; # Remove empty directories

echo "======================================================" >>"${logFile}"

# Check existing plist name for old naming convention and change to new convention.
if [[ -f "${targetVolume}/Extra/com.apple.Boot.plist" ]]; then
  echo "Renaming existing com.apple.Boot.plist to org.chameleon.Boot.plist" >>"${logFile}"
  mv "${targetVolume}/Extra/com.apple.Boot.plist" "${targetVolume}/Extra/org.chameleon.Boot.plist"
fi

# ---------------------------------------------
# Clearing options that Chameleon can managed
# ---------------------------------------------
echo "Clearing options..." >>"${logFile}"
"${PWD}/clean_bootplist.pl" "${targetVolume}" 2>&1 | grep -v 'Does Not Exist' >>"${logFile}"
echo "======================================================" >>"${logFile}"

echo "==============================================="
echo "END - Pre-Install Script"
echo "*********************************"
echo "-----------------------------------------------"
echo ""

exit 0