#!/bin/env nu

export def main [] {
  get_info "docker.io/itzg/minecraft-server"
}

export def get_info [image_name: string] {
  let info = ( parse_name $image_name )
  let token = ( get_token $info.registry $info.group $info.image )
  http get -H [Authorization $"Bearer ($token)"] $"https://index.($info.registry)/v2/($info.group)/($info.image)/manifests/latest" | from json 
}

def parse_name [image_name: string] {
  let parts = ( $image_name | split row "/" )
  {
    registry: $parts.0
    group: $parts.1
    image: $parts.2
  }
}

def get_token [registry: string, group: string, image: string] {
  http get $"https://auth.($registry)/token?service=registry.($registry)&scope=repository:($group)/($image):pull" | get token
}