50_purge_varnish.sh

#!/bin/bash
#
# Cloud Hooks: code-deploy, code-update, db-copy, web-activate
# Essentially any time code or db changes are made.
#
# Purges Varnish cache for all .com domains assigned to the environment in Acquia Cloud.

site="$1"
target_env="$2"
drush_alias=$site'.'$target_env

json="$(drush @$drush_alias ac-domain-list --format=json)"
if [ "$?" -ne "0" ]; then
    echo "The environment needs to have login permissions in order to purge Varnish."
    echo "Run the following to have the environment log in securely:"
    echo "    drush @$drush_alias ssh 'drush ac-api-login'"
else
    domains="$(echo $json | tr '"' '\n' | grep .com)"
    echo "Flushing .com domains in Varnish for this environment..."
    for domain in ${domains[@]}
    do
        echo "    Flushing $domain"
        drush @$drush_alias ac-domain-purge $domain
    done
fi