Installs tvheadend on Ubuntu machines

tvh.sh

#!/bin/sh

# This script installs TVHeadend on your Ubuntu 16.04.x machine
#
# Exit-codes:
# exit 1 = no root rights
# exit 2 = not using Ubuntu 16.04
# exit 3 = TVHeadend already installed (exit in install-function)
# exit 4 = TVHeadend is not installed (exit in deinstall-function)
# exit 5 = TVHeadend repo already exists
# exit 6 = User "hts" does not exist

check_root() {
# checking if the script runs as 'root'
if [ "$(id -u)" != "0" ]; then
	echo "This script has to be executed with root-rights."
	echo "Please run it with: sudo $0"
	exit 1
fi
}


check_os() {
# checking which OS is in use and exit if it's not Ubuntu 16.04.x
if grep -q "Ubuntu 16.04" /etc/lsb-release; then 
	echo "Your OS is Ubuntu 16.04"
else 
	echo "You are not using Ubuntu 16.04. Your OS is:"
	cat /etc/lsb-release
	echo "Aborting"
	exit 2
fi
}


install() {
#check if TVHeadend is already installed
if [ "$(command -v tvheadend)" ]; then
	echo "TVHeadend is already installed on your system."
	echo "Therefore there's no need to install it."
	exit 3
fi

# installing the binary keys
apt-key adv --keyserver hkp://keyserver.ubuntu.com:80 --recv-keys 379CE192D401AB61


# adding TVHeadend repo
if ! grep -q "tvheadend" /etc/apt/sources.list || [ ! -e /etc/apt/sources.list.d/tvheadend.list ]; then
	echo "deb https://dl.bintray.com/tvheadend/deb xenial release-4.2" | tee -a /etc/apt/sources.list.d/tvheadend.list
else
	echo "The TVHeadend repository already exists on your system. As we can't be sure, which development tree you are using, we recommend to remove the existing repository first and restart the script."
	echo "Aborting"
	exit 5
fi


# updating repositories
apt update

# installing TVHeadend
apt install tvheadend
service tvheadend start

#start TVH at boot
update-rc.d tvheadend defaults

echo "In case you can't reach the server because you can't login, please run the script with: sudo $0 reset"
echo "This will reset all current configurations and reconfigure TVHeadend."
}



deinstall() {

# check if TVHeadend is installed and exit if not
if [ ! "$(command -v tvheadend)" ]; then
	echo "TVHeadend is not installed on your system."
	echo "Therefore there's no need to deinstall it."
	exit 4
fi

# deinstall TVheadend and remove .hts-folder
apt purge tvheadend

# remove autostart-option
update-rc.d -f tvheadend remove

echo "TVHeadend is now deinstalled. The next steps will do some clean-ups and will remore the user \"hts\" and the TVHeadend repository from your system."
printf "Do you want to delete the user \"hts\" and the TVHeadend repository (y/n)?: "; read clean_up

case "$clean_up" in
y|yes)
        if [ "$(id -u hts)" ]; then
                deluser --remove-home hts
        else
                echo "The user \"hts\" does not exist on your system."
                echo "Aboring"
                exit 6
        fi
        ;;
n|no)
        exit 0
        ;;
esac

# remove repository
if [ -e /etc/apt/sources.list.d/tvheadend.list ]; then
	rm /etc/apt/sources.list.d/tvheadend.list
else
	echo "The TVHeadend repository seems to exist in: /etc/apt/sources.list "
	echo "Please remove the repo manually by editing that file. The repository is actually not removed!"
fi
}

reset() {
printf "This will reset your current TVHeadend configuration. Are you sure to proceed (y/n)?: "; read reset_tvh

case "$reset_tvh" in
y|yes)
        if [ ! "$(command -v tvheadend)" ]; then
                echo "TVheadend is not installed. Aborting"
                exit 4
        else
                check_os
                service tvheadend stop
                rm -rf /home/hts/.hts
                dpkg-reconfigure tvheadend
                service tvheadend start
        fi
        ;;
n|no)
        exit 0
        ;;
esac
}


case $1 in
install)
	check_root
	check_os
	install
	;;
deinstall)
	check_root
	deinstall
	;;
reset)
	check_root
	reset
	;;
*)
	echo "usage: sudo $0 { install | deinstall | reset }"
esac