#!/bin/sh
# 最新のバージョンを取得
# Usage: bin/version
# Required: curl grep jq ruby
set -eu
base="http://dl-cdn.alpinelinux.org/alpine/latest-stable/releases/armhf"
curl -s "${base}/latest-releases.yaml" \
  | ruby -ryaml -rjson -e 'puts(YAML.load($<).to_json)' \
  | jq -r '.[] | select(.title == "Raspberry Pi").file' \
  | grep -Eo '[0-9]+\.[0-9]+\.[0-9]+'