Linux shell script to install the current version of ChromeDriver

install_chromedriver.sh

#!/bin/sh -e

# This implements https://chromedriver.chromium.org/downloads/version-selection
# to install the latest version of ChromeDriver that's compatible with the
# current google-chrome binary.

# Location where the chromedriver executable will be installed.
# Change this line if you'd like to install it somewhere else.
# This is a symlink; version-suffixed binaries live alongside it.
destlink=${HOME}/local/bin/chromedriver

# Check that we'll be able to run the linux64 version of ChromeDriver.
hwname=$(uname -m)
if [ "$hwname" != x86_64 ]; then
  echo "Unsupported hardware name '${hwname}' from 'uname -m'"
  exit 1
fi

# google-chrome --version prints a line like "Google Chrome 96.0.4664.93 " (yes,
# with a trailing space): https://www.chromium.org/developers/version-numbers/
# To get the latest corresponding Chrome driver release, we need
# "MAJOR.MINOR.BUILD", e.g. "96.0.4664".
cver=$(google-chrome --version)
build=$(echo "$cver" | sed -nre 's/^Google Chrome ([0-9]+\.[0-9]+\.[0-9]+)\.[0-9]+\s*$/\1/p')
if [ -z "$build" ]; then
  echo "Failed parsing Chrome version '${cver}'"
  exit 1
fi

# Get the file containing the latest compatible ChromeDriver release number.
rel=$(wget --quiet -O- "https://chromedriver.storage.googleapis.com/LATEST_RELEASE_${build}")
echo "Need ChromeDriver ${rel} for Chrome ${cver}"

# Download the appropriate version if we don't already have it.
destfile=${destlink}.${rel}
if [ ! -e "$destfile" ]; then
  url=https://chromedriver.storage.googleapis.com/${rel}/chromedriver_linux64.zip
  tmpdir=$(mktemp --directory -t chromedriver.XXXXXXXXXX)
  zipfile=${tmpdir}/$(basename "$url")
  echo "Downloading ${url} to ${tmpdir}"
  wget --quiet -O "$zipfile" "$url"

  echo "Extracting executable to ${destfile}"
  unzip -q "$zipfile" chromedriver -d "$tmpdir"
  mv "${tmpdir}/chromedriver" "$destfile"
  chmod 0755 "$destfile"
  rm -rf "$tmpdir"
fi

# If there's already a regular file in place of the link, move it away.
if [ -e "$destlink" ] && [ ! -L "$destlink" ]; then
  echo "Moving ${destlink} to ${destlink}.old"
  mv "$destlink" "${destlink}.old"
fi

ln -sf "$(basename "$destfile")" "$destlink"
echo "ChromeDriver ${rel} installed to ${destlink}"

This is outdated. You're better off using the version at https://codeberg.org/derat/nup/src/branch/main/build/install_chromedriver.sh.