discord.sh

#!/bin/sh -e
XDG_DATA_HOME="${XDG_DATA_HOME:-"$HOME/.local/share"}"

branch="${1:-stable}"

case "$branch" in
	stable)
		name=Discord
		;;
	ptb)
		name=DiscordPTB
		;;
	canary)
		name=DiscordCanary
		;;
	development)
		name=DiscordDevelopment
		;;
	*)
		printf 'Bad branch name: %s\n' "$branch" >&2
		exit 1
		;;
esac

dashed_name='discord'
if test "$branch" != stable
then
	dashed_name="discord-$branch"
fi

if test -d "$XDG_DATA_HOME/$name"
then
	rm -rf "$XDG_DATA_HOME/$name-old"
	mv "$XDG_DATA_HOME/$name" "$XDG_DATA_HOME/$name-old"
fi

archive="$(mktemp)"
curl -fSLo "$archive" -- "https://discord.com/api/download/$branch?platform=linux&format=tar.gz"

tar -xzf "$archive" -C "$XDG_DATA_HOME"

mkdir -p "$XDG_DATA_HOME/applications" "$XDG_DATA_HOME/icons/hicolor/256x256/apps"
touch "$XDG_DATA_HOME/icons/hicolor"

cp "$XDG_DATA_HOME/$name/discord.png" "$XDG_DATA_HOME/icons/hicolor/256x256/apps/com.discord.$name.png"
cp "$XDG_DATA_HOME/$name/$dashed_name.desktop" "$XDG_DATA_HOME/applications/com.discord.$name.desktop"
sed -i~ "s@^StartupWMClass=.*@StartupWMClass=$dashed_name@" "$XDG_DATA_HOME/applications/com.discord.$name.desktop"
sed -i~ "s@^Exec=.*@Exec=$XDG_DATA_HOME/$name/$name@" "$XDG_DATA_HOME/applications/com.discord.$name.desktop"
sed -i~ "s@^Icon=.*@Icon=com.discord.$name@" "$XDG_DATA_HOME/applications/com.discord.$name.desktop"
rm "$XDG_DATA_HOME/applications/com.discord.$name.desktop~"