Joplin_install_and_update.sh

#!/bin/bash
set -e
# Title
echo "       _             _  _         _           _        _ _           "
echo "      | |           | |(_)       (_)         | |      | | |          "
echo "      | | ___  _ __ | | _ _ __    _ _ __  ___| |_ __ _| | | ___ _ __ "
echo "  _   | |/ _ \|  _ \| || |  _ \  | |  _ \ /  __|  __  | | |/ _ \ __| "
echo " | |__| | (_) | |_) | || | | | | | | | | \__ \ || (_| | | |  __/ |   "
echo "  \____/ \___/| .__/|_||_|_| |_| |_|_| |_|___/\__\__,_|_|_|\___|_|   "
echo "              | |                                                    "
echo "              |_|                                                    "

# Get the latest version to download
version=$(curl --silent "https://api.github.com/repos/laurent22/joplin/releases/latest" | grep -Po '"tag_name": "v\K.*?(?=")')

# Delete previous version
rm -f ~/.joplin/*.AppImage ~/.local/share/applications/*joplin.desktop

# Creates the folder where the binary will be stored
mkdir -p ~/.joplin/

# Download the latest version
wget -O ~/.joplin/Joplin-$version-x86_64.AppImage https://github.com/laurent22/joplin/releases/download/v$version/Joplin-$version-x86_64.AppImage
 
# Gives execution privileges
chmod +x ~/.joplin/Joplin-$version-x86_64.AppImage

# Download icon
wget -O ~/.joplin/Icon512.png https://joplin.cozic.net/images/Icon512.png

# Detect desktop environment  
if [ "$XDG_CURRENT_DESKTOP" = "" ]
then
  desktop=$(echo "$XDG_DATA_DIRS" | sed 's/.*\(xfce\|kde\|gnome\).*/\1/')
else
  desktop=$XDG_CURRENT_DESKTOP
fi
desktop=${desktop,,}  # convert to lower case

# Create icon for Gnome
if [[ $desktop =~ .*gnome.* ]] 
then
   echo -e "[Desktop Entry]\nEncoding=UTF-8\nName=Joplin\nExec=/home/$USER/.joplin/Joplin-$version-x86_64.AppImage\nIcon=/home/$USER/.joplin/Icon512.png\nType=Application\nCategories=Application;" >> ~/.local/share/applications/joplin.desktop
fi

# Informs the user that it has been installed and cleans variables
echo 'Joplin installed in the version' $version

# start Joplin:
~/.joplin/Joplin-$version-x86_64.AppImage

unset version