#!/bin/bash
set -e -o pipefail
errhandler() {
    echo >&2
    echo "Installation encountered error on line $1.  Aborting.  Please contact Groundwork Support for assistance." >&2
    echo >&2
}
trap 'errhandler $LINENO' ERR
GWVER="7.1.1"
PATCH="TB$GWVER-2"
GWDIR="/usr/local/groundwork"
OUTDIR="$GWDIR/common/var/patches"
LOGFILE="$OUTDIR/$PATCH.log"
OUTFILE="$OUTDIR/$PATCH.installed"
echo "===== Groundwork Patch $PATCH installer ====="
echo
echo "This patch will allow you to have Groundwork use a"
echo "custom installed JDK7 instead of the included Oracle JDK7."
echo
echo "Please note that this script will stop/start Groundwork which"
echo "will result in a few minutes of downtime.  This script will also"
echo "modify various portions of your Groundwork installation."
echo
echo -n "Ok to proceed? [y/N] "
read -r proceed
echo
case "$proceed" in
    [yY][eE][sS]|[yY])
        ;;
    *)
        echo "Installation aborted"
        exit 0
        ;;
esac
if [[ $EUID -ne 0 ]]; then
    echo "ERROR: This script must be run as root" >&2
    exit 1
fi
if [ -f $OUTFILE ]; then
    echo "ERROR: Patch already installed.  Please contact Groundwork Support for assistance." >&2
    exit 1
fi
if ! grep -Exq "version= 7.1.0|version= $GWVER" $GWDIR/Info.txt; then
    echo "ERROR: Version 7.1.0 or $GWVER required" >&2
    exit 1
fi
if ! which java &>/dev/null; then
    echo "ERROR: java required but not found" >&2
    exit 1
fi
if ! which javac &>/dev/null; then
    echo "ERROR: JDK required but not found" >&2
    exit 1
fi
mkdir -p $OUTDIR
exec &> >(tee -a "$LOGFILE")
echo "PATCH: $PATCH"
echo "USER: $USER"
echo "HOST: `hostname -f`"
echo "INSTALL START: `date`"
echo "=================================================="
echo "Determining JDK location..."
JDK_PATH=`dirname $(dirname $(readlink -f $(which javac)))`
echo "System default JDK is at $JDK_PATH"
echo -n "Use this? [Y/n] "
read -r response
case "$response" in
    [yY][eE][sS]|[yY]|"")
        ;;
    *)
        echo "Please enter path to JDK (should be parent directory of bin, jre,"
        echo "lib, etc.) example: /usr/lib/jvm/java-7-openjdk-amd64"
        echo -n "> "
        read -r JDK_PATH
        ;;
esac
echo "Stopping gwservices..."
/etc/init.d/groundwork stop gwservices
echo "Backing up original JDK..."
mv $GWDIR/java $GWDIR/java.original
echo "Setting JAVA_HOME to $JDK_PATH in $GWDIR/scripts/setenv.sh...."
sed -i.original "s|$GWDIR/java|$JDK_PATH|g" $GWDIR/scripts/setenv.sh
echo "Setting JAVA_HOME to $JDK_PATH in $GWDIR/nagios/libexec/check_jvm.pl..."
sed -i.original "s|$GWDIR/java|$JDK_PATH|g" $GWDIR/nagios/libexec/check_jvm.pl
echo "Setting JAVA_HOME to $JDK_PATH in $GWDIR/foundation/container/rstools/php/bsmCheck/protected/components/ConsoleCommand.php..."
sed -i.original "s|/groundwork/java|$JDK_PATH|g" $GWDIR/foundation/container/rstools/php/bsmCheck/protected/components/ConsoleCommand.php
echo "Starting gwservices..."
/etc/init.d/groundwork start gwservices
echo "=================================================="
echo "INSTALL COMPLETE: `date`"
touch $OUTFILE