Downloads and extracts the correct chromedriver binary for the currently installed Chromium/Chrome version.

downloadChromeWebDriver.sh

#!/usr/bin/env bash
set -xeuo pipefail

function get_major_version () {
  echo "${1}" | grep -Po '[^0-9]+\K(\d+)' | head -n1
}

function get_version () {
  echo "${1}" | grep -Po '[^0-9]+\K([0-9.]+)' | head -n1
}

BIN_DIR="./.cache/chromedriver"
BIN_PATH="${BIN_DIR}/chromedriver"

echo "Deriving chromedriver version from Chromium version."
MAJOR_VERSION="$(get_major_version "$(chromium-browser --version || google-chrome --version)")"
CHROMEDRIVER_VERSION="$(curl -s "https://chromedriver.storage.googleapis.com/LATEST_RELEASE_${MAJOR_VERSION}")"

if [[ -f  "${BIN_PATH}" ]]; then
  CURRENT_VERSION="$(get_version "$($BIN_PATH --version)")"
  if [[ "${CURRENT_VERSION}" == "${CHROMEDRIVER_VERSION}" ]]; then
    echo "Skipping download. chromedriver ${CHROMEDRIVER_VERSION} already exists."
    exit 0
  else
    echo "Removing chromedriver ${CURRENT_VERSION}."
    rm "${BIN_PATH}"
  fi
fi


TMP_DIR="$(mktemp -d)"
ZIP_FILE="${TMP_DIR}/chromedriver.zip"

echo "Downloading chromedriver ${CHROMEDRIVER_VERSION}"
wget -q -O "${ZIP_FILE}" "https://chromedriver.storage.googleapis.com/${CHROMEDRIVER_VERSION}/chromedriver_linux64.zip"
unzip "${ZIP_FILE}" chromedriver

mkdir -p "${BIN_DIR}"
mv chromedriver "${BIN_PATH}"
rm -rf "${TMP_DIR}"

echo 'Done.'