#!/bin/bash
set -euxo pipefail

url="https://github.com/WordPress/WordPress/archive/${WP_VERSION}.tar.gz"
packages=(
	php7-gd
	php7-mysqli
	php7-opcache
	php7-zip
)

function cleanup() {
	rm -rf \
		/tmp/wp.tgz
}
trap cleanup EXIT

function step() {
	echo "$@..." >&2
}

step "Downloading wordpress release ${WP_VERSION}"
curl -sSfLo /opt/wp.tgz "${url}"
echo "${WP_CHECKSUM}  /opt/wp.tgz" | sha256sum -c

step "Installing required packages"
apk --no-cache add "${packages[@]}"