Simple bash script to download the latest version of Signal Desktop

update-signal-desktop.sh

#!/bin/bash

# Public domain. Use and abuse and tell me if you make it prettier,
# like, add a "--prefix" option or figure out where to put .desktop
# files or link the binary to...

echo -n "Looking up latest version, "

verurl="https://github.com/signalapp/Signal-Desktop/releases"
pkgver=$(curl -s "${verurl}" | grep "/signalapp/Signal-Desktop/releases/tag/" -m 1 | grep -oP '[\d\.]*')
pkgdir="${HOME}/.local"
pkgfile="signal-desktop_${pkgver}_amd64.deb"

echo -n "downloading, "
wget -qc "https://updates.signal.org/desktop/apt/pool/main/s/signal-desktop/${pkgfile}"

echo -n "unpacking, "
ar x "${pkgfile}"
tar xf data.tar.xz -C "${pkgdir}"

echo "done."