docker-entrypoint.sh

#!/bin/sh
set -e

# usage: file_env VAR [DEFAULT]
#    ie: file_env 'XYZ_DB_PASSWORD' 'example'
# (will allow for "$XYZ_DB_PASSWORD_FILE" to fill in the value of
#  "$XYZ_DB_PASSWORD" from a file, especially for Docker's secrets feature)
file_env() {
	local var="$1"
	local fileVar="${var}_FILE"
	local def="${2:-}"
	local varValue=$(env | grep -E "^${var}=" | sed -E -e "s/^${var}=//")
	local fileVarValue=$(env | grep -E "^${fileVar}=" | sed -E -e "s/^${fileVar}=//")
	if [ -n "${varValue}" ] && [ -n "${fileVarValue}" ]; then
		echo >&2 "error: both $var and $fileVar are set (but are exclusive)"
		exit 1
	fi
	if [ -n "${varValue}" ]; then
		export "$var"="${varValue}"
	elif [ -n "${fileVarValue}" ]; then
		export "$var"="$(cat "${fileVarValue}")"
	elif [ -n "${def}" ]; then
		export "$var"="$def"
	fi
	unset "$fileVar"
}

file_env 'MATOMO_DATABASE_HOST'
file_env 'MATOMO_DATABASE_USERNAME'
file_env 'MATOMO_DATABASE_PASSWORD'
file_env 'MATOMO_DATABASE_DBNAME'

if [ ! -e matomo.php ]; then
	uid="$(id -u)"
	gid="$(id -g)"
	if [ "$uid" = '0' ]; then
		case "$1" in
			apache2*)
				user="${APACHE_RUN_USER:-www-data}"
				group="${APACHE_RUN_GROUP:-www-data}"

			# strip off any '#' symbol ('#1000' is valid syntax for Apache)
			user="${user#'#'}"
			group="${group#'#'}"
			;;
			*) # php-fpm
				user='www-data'
				group='www-data'
				;;
		esac
	else
		user="$uid"
		group="$gid"
	fi
	tar cf - --one-file-system -C /usr/src/matomo . | tar xf -
	chown -R "$user":"$group" .
fi

exec "$@"