Install Vivaldi browser (latest) on RPM-based Linux distros

install_vivaldi.sh

#!/bin/bash

if [ "$(id -u)" != "0" ]; then
   echo "This script must be run as root. Try sudo ./install_vivaldi.sh"
   exit 1
fi

latestVivaldiRpmUrl() {
  echo $(curl -sL "https://vivaldi.com/download" | grep "https.*vivaldi-stable-.*.x86_64.rpm" | cut -d '"' -f 4)
}

latestVivaldiVersion() {
  echo $(curl -sL "https://vivaldi.com/download" | grep -E "https.*vivaldi-stable-.*.x86_64.rpm" | cut -d '"' -f 4 | cut -d '/' -f 5 | cut -d '-' -f 3 )
}

echo "Checking installed vs latest Vivaldi versions"
INSTALLEDVERSION=$(installedVersion "vivaldi-stable")
LATESTVERSION=$(latestVivaldiVersion)

if [ "$INSTALLEDVERSION" == "$LATESTVERSION" ]; then
  echo "Latest version $LATESTVERSION already installed"
  exit 0
fi

if [ "$INSTALLEDVERSION" == "" ]; then
  echo "No previous Vivaldi installation detected; installing $LATESTVERSION"
else
  echo "Outdated version $INSTALLEDVERSION installed; updating to $LATESTVERSION"
fi

DOWNLOADURL=$(latestVivaldiRpmUrl)
INSTALLER="$(mktemp -u).vivaldi.rpm"
echo "Downloading from $DOWNLOADURL to $INSTALLER"
curl -L "$(latestVivaldiRpmUrl)" -o "$INSTALLER"
dnf install -y "$INSTALLER"