Download ChromeDriver - WebDriver for Chrome

get_chrome_driver.sh

#!/bin/bash 

# from https://chromedriver.chromium.org/downloads/version-selection
#  First, find out which version of Chrome you are using. Let's say you have Chrome 72.0.3626.81.
#  Take the Chrome version number, remove the last part, and append the result to URL
#     "https://chromedriver.storage.googleapis.com/LATEST_RELEASE_". For example, with Chrome version 72.0.3626.81,
#     you'd get a URL "https://chromedriver.storage.googleapis.com/LATEST_RELEASE_72.0.3626".
#  Use the URL created in the last step to retrieve a small file containing the version of ChromeDriver to use.
#     For example, the above URL will get your a file containing "72.0.3626.69". (The actual number may change in the future,
#     of course.)
#  Use the version number retrieved from the previous step to construct the URL to download ChromeDriver. With version
#     72.0.3626.69, the URL would be "https://chromedriver.storage.googleapis.com/index.html?path=72.0.3626.69/".
#  After the initial download, it is recommended that you occasionally go through the above process again to see
#     if there are any bug fix releases.

OS=$(uname)
echo "executing on ${OS}"

CHROME_VER=$(google-chrome-stable --version)
CHROME_VER_TRIMMED=${CHROME_VER% *} # trim tailing space
CHROME_VER_NUM="${CHROME_VER_TRIMMED##* }" # everything after the last space
echo "          chrome version: $CHROME_VER_NUM"
CHROME_VER_SHORT=${CHROME_VER_NUM%.*} # everything before the last period
echo "    chrome version short: ${CHROME_VER_SHORT}"
CHROME_DRIVER_INFO_URL="https://chromedriver.storage.googleapis.com/LATEST_RELEASE_${CHROME_VER_SHORT}"
echo "      driver info url is: ${CHROME_DRIVER_INFO_URL}"
CHROME_DRIVER_VER=$(wget ${CHROME_DRIVER_INFO_URL} -q -O -)
echo "chrome driver version is: $CHROME_DRIVER_VER"

if [ ! -f env/bin/chromedriver ]; then
    echo "downloading chromedriver"
    if [ "Darwin" == "$OS" ]; then
        wget -q https://chromedriver.storage.googleapis.com/$CHROME_DRIVER_VER/chromedriver_mac64.zip
        unzip chromedriver_mac64.zip
    else
        wget -q https://chromedriver.storage.googleapis.com/$CHROME_DRIVER_VER/chromedriver_linux64.zip
        unzip chromedriver_linux64.zip
    fi
    cp chromedriver env/bin/ 
else
    echo "chromedriver exists"
fi