entrypoint.sh

#!/bin/bash
set -e

function run_scripts () {
	SCRIPTS_DIR="/scripts/$1.d"
	SCRIPT_FILES_PATTERN="^${SCRIPTS_DIR}/[0-9][0-9][a-zA-Z0-9_-]+$"
	SCRIPTS=$(find "$SCRIPTS_DIR" -type f -uid 0 -executable -regex "$SCRIPT_FILES_PATTERN" | sort)
	if [ -n "$SCRIPTS" ] ; then
		echo "=>> $1-scripts:"
	    for script in $SCRIPTS ; do
	        echo "=> $script"
			. "$script"
	    done
	fi
}

### auto-configure database from environment-variables

if [ -n "$MYSQL_PORT_3306_TCP" ] && [ -n "$POSTGRES_PORT_5432_TCP" ]; then
	if [ -z "$DB_HOST" ] && [ -z "$DB_DRIVER" ]; then
		echo "ERROR: A linked MySQL- and a linked Postgres-container were detected."
		echo "  You must set the DB_DRIVER-variable to either 'mysql' or 'pgsql'."
		exit 1
	fi
fi

if [ -n "$MYSQL_PORT_3306_TCP" ]; then
	DB_DRIVER=mysql
	if [ -z "$DB_HOST" ]; then
		DB_HOST=$MYSQL_PORT_3306_TCP_ADDR
		DB_PORT=$MYSQL_PORT_3306_TCP_PORT
	else
		echo >&2 "WARNING: Both DB_HOST and MYSQL_PORT_3306_TCP found."
		echo >&2 "  Connecting to DB_HOST ($DB_HOST)"
		echo >&2 "  instead of the linked mysql container."
	fi
elif [ -n "$POSTGRES_PORT_5432_TCP" ]; then
	DB_DRIVER=pgsql
	if [ -z "$DB_HOST" ]; then
		DB_HOST=$POSTGRES_PORT_5432_TCP_ADDR
		DB_PORT=$POSTGRES_PORT_5432_TCP_PORT
	else
		echo >&2 "WARNING: Both DB_HOST and POSTGRES_PORT_5432_TCP found."
		echo >&2 "  Connecting to DB_HOST ($DB_HOST)"
		echo >&2 "  instead of the linked postgres container."
	fi
fi

if [ -z "$DB_HOST" ]; then
	echo >&2 "ERROR: missing DB_HOST and MYSQL_PORT_3306_TCP or POSTGRES_PORT_5432_TCP environment variables."
	echo >&2 "  Did you forget to --link some_mysql_container:mysql, --link some_postgres_container:postgres, or set an external db"
	echo >&2 "  with -e DB_HOST=hostname?"
	exit 1
fi


### set database configuration defaults if necessary

: ${DB_DRIVER:='mysql'}
: ${DB_NAME:='drupal'}

if [ "${DB_DRIVER}" = 'mysql' ]; then
	: ${DB_USER:='root'}
	if [ "${DB_USER}" = 'root' ]; then
		: ${DB_PASS:=$MYSQL_ENV_MYSQL_ROOT_PASSWORD}
	fi
	: ${DB_PORT:='3306'}
elif [ "${DB_DRIVER}" = 'pgsql' ]; then
	: ${DB_USER:='postgres'}
	if [ "$DB_USER" = 'postgres' ]; then
		: ${DB_PASS:=$POSTGRES_ENV_POSTGRES_PASSWORD}
	fi
	: ${DB_PORT:='5432'}
fi

if [ -z "$DB_PASS" ]; then
	echo >&2 "ERROR: missing required DB_PASS environment variable"
	echo >&2 "  Did you forget to -e DB_PASS=... ?"
	echo >&2
	echo >&2 "  (Also of interest might be DB_USER and DB_NAME.)"
	exit 1
fi


### other defaults

: ${ADMIN_USER:='admin'}  # DO NOT export!
: ${ADMIN_PASSWORD:='changeme'}  # DO NOT export!


### store database-configuration

export DB_DRIVER DB_HOST DB_PORT DB_NAME DB_USER DB_PASS
echo -e "# Drupals's database configuration, parsed in /var/www/sites/default/settings.php\n
export DB_DRIVER=${DB_DRIVER} DB_HOST=${DB_HOST} DB_PORT=${DB_PORT} DB_NAME=${DB_NAME} DB_USER=${DB_USER} DB_PASS=${DB_PASS}" >> /etc/bash.bashrc


###  connect to database

echo
echo "=> Trying to connect to a database using:"
echo "      Database Driver:   $DB_DRIVER"
echo "      Database Host:     $DB_HOST"
echo "      Database Port:     $DB_PORT"
echo "      Database Username: $DB_USER"
echo "      Database Password: $DB_PASS"
echo "      Database Name:     $DB_NAME"
echo

for ((i=0;i<20;i++))
do
    if [[ $DB_DRIVER == "mysql" ]]; then
        DB_CONNECTABLE=$(mysql -u"$DB_USER" -p"$DB_PASS" -h"$DB_HOST" -P"$DB_PORT" -e 'status' >/dev/null 2>&1; echo "$?")
    elif [[ $DB_DRIVER == "pgsql" ]]; then
        DB_CONNECTABLE=$(PGPASSWORD=$DB_PASS psql -U "$DB_USER" -h "$DB_HOST" -p "$DB_PORT" -l >/dev/null 2>&1; echo "$?")
    fi
	if [[ $DB_CONNECTABLE -eq 0 ]]; then
		break
	fi
    sleep 3
done

if ! [[ $DB_CONNECTABLE -eq 0 ]]; then
	echo "Cannot connect to database"
    exit "${DB_CONNECTABLE}"
fi


### Initial setup if database doesn't exist

if ! drush pm-list > /dev/null 2>&1; then
	run_scripts setup
	echo "=> Done installing site!"
	if [ $EXTRA_SETUP_SCRIPT ]; then
		echo "=> WARNING: The usage of EXTRA_SETUP_SCRIPT is deprectated. Put your script into /scripts/post-setup.d/"
		. $EXTRA_SETUP_SCRIPT
		echo "=> Successfully ran extra setup script ${EXTRA_SETUP_SCRIPT}."
	fi
	else
	echo "=> Skipped setup - database ${DB_NAME} already exists."
fi


###

run_scripts pre-launch

unset ADMIN_USER
unset ADMIN_PASSWORD

exec apache2-foreground

exit 1