discord-deb-update.sh

#!/bin/bash
# Script to download and then install latest .deb Discord client.
# Created 2024-01-29 by Dayne Broderson
#
# Script Overview
# 1. Sends a request to the Discord URL to get the headers and extract the 
#    location header, which contains the final download URL.
# 2. It extracts the desired filename from the final download URL and cleans 
#    up any trailing whitespace or carriage return characters.
# 3. It checks if the file with the extracted filename already exists in the 
#    current directory. If it exists, it skips the download.
# 4. If the file doesn't exist, it proceeds to download the file using curl 
#    and checks the exit code to determine if the download was successful 
#    or not.
# 5. Finally it prompts user if they want to do the sudo dpkg -i install of the download.
# 
# Recommended install dance:
# cd .local/bin # or $HOME/bin # or put in /usr/local/bin
# curl -O https://gist.githubusercontent.com/dayne/40c45988e7ecfd9b74b954e711470b9c/raw/discord-deb-update.sh
# chmod +x discord-deb-update.sh


DOWNDIR=/tmp

cd $DOWNDIR
url='https://discord.com/api/download/stable?platform=linux&format=deb'

location=$(curl -sI -L "$url"| grep location)
if [ $? -eq 0 ]; then
	echo $location
else
	echo "ERROR: unable to get location of latest discord .deb file"
	exit 1
fi

filename=$(echo "$location" | awk -F'/' '{print $NF}' | tr -d '\r' )
if [ -f $filename ]; then
	echo "File exists: $filename"
	echo "Skipping download"
else
	echo "Downloading $filename"
	curl -JL -o $filename $url
	if [ $? -eq 0 ]; then
		echo "SUCCESS: Download of $filename complete"
		echo "File downloadedto: /tmp/$filename"
	else
		echo "ERROR: Download of $filename failed."
		exist 1
	fi
fi

# ensure interactive shell is happening
if [ ! -t 0 ]; then
	echo "file downloaded - non interactive shell detected - exiting"
	exit
fi

while true; do
    read -p "Do you want to run install using dpkg? (Y/N): " answer
    case $answer in
        [Yy]|[Yy][Ee][Ss])
            # Run your command here
            echo "Installing $filename"
	    sudo dpkg -i $DOWNDIR/$filename
	    if [ $? -eq 0 ]; then
		    echo "install successful"
		    exit 0
	    else
		    echo "install failed: try yourself with:"
		    echo "sudo dpkg -i $DOWNDIR/$filename"
		    exit 1
	    fi
            break
            ;;
        [Nn]|[Nn][Oo])
            echo "Exiting..."
            exit 0
            ;;
        *)
            echo "Invalid input. Please enter Y, N, yes, or no."
            ;;
    esac
done