ShellScript

%sh
echo "deb [arch=amd64] http://dl.google.com/linux/chrome/deb/ stable main" >> /etc/apt/sources.list

%sh
if [ -e /databricks/driver/linux_signing_key.pub ]; then
  echo "Linux Signing Key is already present on the cluster at /databricks/driver"
else
  echo "DownLoading Linux Signing Key file"
  wget https://dl.google.com/linux/linux_signing_key.pub
  sudo apt-key add linux_signing_key.pub
  sudo apt update
  echo "Downloading Google Chrome Stable Version"
  sudo apt install -y google-chrome-stable
fi

%sh
#we are making sure that we are downoading the compatible chrome driver version by doing the below steps.Above command download the stable version of google chrome from the repository and that version can vary based on the releases that are made for chrome browser.
#getting the current chrome browser version
chromeVersion=$(google-chrome --product-version)
echo "Chrome Browser Version = "$chromeVersion

#getting the major version value from the full version
chromeMajorVersion=${chromeVersion%%.*}

# setting the base url for getting the release url for the chrome driver
baseDriverLatestReleaseURL=https://chromedriver.storage.googleapis.com/LATEST_RELEASE_

#creating the latest release driver url based on the major version of the chrome
latestDriverReleaseURL=$baseDriverLatestReleaseURL$chromeMajorVersion
echo "Chrome Driver Latest Release URL = "$latestDriverReleaseURL

#file name of the file that gets downloaded which would contain the full version of the chrome driver to download
latestDriverVersionFileName="LATEST_RELEASE_"$chromeMajorVersion

if [ -e "/databricks/driver/"$latestDriverVersionFileName ]; then
  echo "Latest Release file already exists with exact version to use for downloading compatible chrome driver"
else
  echo "DownLoading Latest Release Driver File"
  wget $latestDriverReleaseURL 
fi

#reading the file to get the version of the chrome driver that we should download
latestFullDriverVersion=$(cat $latestDriverVersionFileName)
echo "Chrome Driver Version = "$latestFullDriverVersion

#creating the final URL by passing the compatible version of the chrome driver that we should download
finalURL="https://chromedriver.storage.googleapis.com/"$latestFullDriverVersion"/chromedriver_linux64.zip"
echo "Chrome Driver Download URL = "$finalURL

if [ -e /databricks/driver/chromedriver_linux64.zip ]; then
  echo "Chrome Driver Zip is already present on the cluster at /databricks/driver"
else
  echo "DownLoading Chrome Driver zip file"
   wget $finalURL
fi

if [ -e /usr/local/bin/chromedriver ]; then
  echo "Chrome Driver exe is already present at the specified Location: /usr/local/bin"
else
  echo "unzipping the Chrome Driver exe at location /usr/local/bin"
  unzip chromedriver_linux64.zip -d /usr/local/bin
fi