simpe to install syncthing

syncthing-install.sh

#!/bin/bash
VERSION=v1.20.1
INSTALL_DIR=/usr/local/syncthing
TMP_DIR=/tmp/syncthing
HOME_DIR=/etc/syncthing
function check_error() {
	if [[ $? -ne 0 ]]; then
		echo $1
		exit 1
	fi
}
function install() {
	mkdir $INSTALL_DIR
	mkdir $TMP_DIR
	mkdir $HOME_DIR
	cd $TMP_DIR
	wget -O syncthing.tar.gz https://github.com/syncthing/syncthing/releases/download/${VERSION}/syncthing-linux-amd64-${VERSION}.tar.gz
	check_error "download failed!"
	tar -zxf syncthing.tar.gz --strip-components 1 -C $INSTALL_DIR
	check_error "decopmression error!"
	cat << EOT > /etc/systemd/system/[email protected]
[Unit]
Description=Syncthing - Open Source Continuous File Synchronization for %I
Documentation=man:syncthing(1)
After=network.target

[Service]
User=%i
ExecStart=${INSTALL_DIR}/syncthing -no-browser -gui-address="0.0.0.0:8384" -no-restart -logflags=0
Restart=on-failure
SuccessExitStatus=3 4
RestartForceExitStatus=3 4

[Install]
WantedBy=multi-user.target
EOT
    systemctl enable --now syncthing@${USER}
    rm -rf $TMP_DIR
    rm -rf syncthing.tar.gz
    clear
    echo 'http://127.0.0.1:8384'
    echo 'install finished!'
}

function remove() {
	systemctl stop syncthing@${USER}
	systemctl disable syncthing@${USER}
	rm -rf /etc/systemd/system/syncthing.service
	rm -rf $INSTALL_DIR
	clear
	echo 'remove finished!'
}

function help() {
    cat << EOF
    syncthing install helper!!!
    usage: 
    ./syncthing.sh menu
    install: install syncthing
    remove: remove syncthing
EOF
}

function main() {
    if [ $# -lt 1 ]; then
        help
    else
        case $1 in
            install)
                install
            ;;
            remove)
                remove
            ;;
            *)
                echo 'command not found!'
                help
            ;;
        esac
    fi
}
main $@