Drupal 8 deployment script via git (bare repository)

drupal8_deploy.sh

#!/bin/bash
# @file
# deploy Production the Environment

SOURCE="@self"
TARGET="@live"
FORMAT='\e[1;33m#'
RESET='\033[0m' # No Color

# prompt user for commit message
read -p "$(echo $FORMAT "Commit Message: "$RESET)" MESSAGE

# check for empty commit message
if [ "$MESSAGE" != "" ]; then

    ## export latest configs
    drush $SOURCE config:export

    ## deploy the latest code
    git add .
    git commit -a -m "$MESSAGE"
    git push live master

    ## install packages
    drush $TARGET ssh composer install --no-dev
    drush $TARGET updatedb

    ## import uploaded configs 
    drush $TARGET -y state:set system.maintenance_mode 1
    drush $TARGET config:import
    drush $TARGET cache:rebuild
    drush $TARGET -y state:set system.maintenance_mode 0

else
    echo "You must provide a commit message!"
fi