Typora Install Script for Linux

typora-installer.sh

#!/bin/bash
# Typora Installer by dragonman225

# Variables
USER=$(/usr/bin/id -run)
INSTALL_DIR="${HOME}/applications"
APP_SHORTCUT="/usr/share/applications/typora.desktop"
TYPORA_ARCHIVE="/tmp/Typora-linux-x64.tar.gz"

# Greeting
echo "Typora Installer by dragonman225"
echo "Start installing Typora to ${INSTALL_DIR}"
read -p "Continue? (yY/nN)" -r
if [[ ${REPLY} =~ ^[Yy]$ ]]
then
	# Make sure install directory exists
	if [ ! -d ${INSTALL_DIR} ]; then
		mkdir -p ${INSTALL_DIR}
	fi

	# Download Typora
	echo -e "Downloading Typora..."
	curl https://typora.io/linux/Typora-linux-x64.tar.gz -o ${TYPORA_ARCHIVE}
			
	# Extract Typora
	echo -e "Extracting Typora to ${INSTALL_DIR} ..."
	if [ -d ${INSTALL_DIR}/typora ]; then
		echo "Typora exists. Remove for fresh install ..."
		rm -rf ${INSTALL_DIR}/typora
	fi
	tar -xzf ${TYPORA_ARCHIVE} --strip-components=1 -C ${INSTALL_DIR}
	mv ${INSTALL_DIR}/Typora-linux-x64 ${INSTALL_DIR}/typora
	chown -R ${USER}:${USER} ${INSTALL_DIR}/typora
	rm ${TYPORA_ARCHIVE}

	# Create Desktop Entry
	if [ ! -d ${APP_SHORTCUT_DIR} ]; then
		mkdir -p ${APP_SHORTCUT_DIR}
	fi
	echo "Creating Desktop Entry at ${APP_SHORTCUT} ..."
	sudo bash -c "cat <<- EOF > ${APP_SHORTCUT}
	[Desktop Entry]
	Type=Application
	Encoding=UTF-8
	Name=Typora
	Comment=Markdown Editor
	Exec=${INSTALL_DIR}/typora/Typora %F
	Icon=${INSTALL_DIR}/typora/resources/app/asserts/icon/icon_256x256.png
	Terminal=false
	EOF"
fi