entrypoint.sh

#!/bin/bash
# run gcloud-snapshot.sh once and execute the notify
# Alternative if $DAEMON is set, run it in a loop with a configurable delay
# ($SLEEP environment variable) and a notification command
# ($NOTIFY_COMMAND environment variable), for example a curl webhook
# notification (e.g. to Slack).

service_account_auth() {
    if [ -n "${KEY_FILE}" ]; then
        gcloud auth activate-service-account --key-file="$KEY_FILE"
    fi
}

set_project() {
    if [ -n "${PROJECT}" ]; then
        gcloud config set project "$PROJECT"
    fi
}

run() {
    if [ -n "${FILTER}" ]; then
        /opt/gcloud-snapshot.sh -r -f "$FILTER"
    else
        /opt/gcloud-snapshot.sh -r
    fi
    if [ -n "${NOTIFY_COMMAND}" ]; then
        echo "Running notify command: $NOTIFY_COMMAND"
        bash -c "$NOTIFY_COMMAND"
    fi
}

service_account_auth
set_project

if [ -n "${DAEMON}" ]; then
    if [ -z "${SLEEP}" ]; then
        # Default to every 6 hours
        SLEEP=21600
    fi
    while true; do
        run
        echo "Sleeping for $SLEEP seconds"
        sleep $SLEEP
    done
else
    run
fi