#!/usr/bin/env nix-shell
#! nix-shell -p ruby -i ruby

require 'net/http'
require 'json'
require 'pathname'
require 'fileutils'

ZIG_URI = URI("https://ziglang.org/download/index.json")
DEFAULT_SYSTEMS = ["x86_64-linux", "aarch64-linux", "aarch64-darwin", "x86_64-darwin"]

response = JSON.parse(Net::HTTP.get(ZIG_URI))
sources = if Pathname.new("sources.json").exist?
            JSON.parse(File.read("sources.json"))
          else
            { "master" => {} }
          end

# Update versions
response.each do |k, v|
  unless k == "master"
    sources[k] = DEFAULT_SYSTEMS.to_h do |system|
      data = if system == "x86_64-darwin"
               response[k]["x86_64-macos"] or {}
             elsif system == "aarch64-darwin"
               response[k]["aarch64-macos"] or {}
             else
               response[k][system] or {}
             end
      [system, { "url" => data["tarball"],
                 "version" => k,
                 "sha256" => data["shasum"] }]
    end
  end
end

# Update master
sources["master"][response["master"]["date"]] = DEFAULT_SYSTEMS.to_h do |system|
  data = if system == "x86_64-darwin"
           response["master"]["x86_64-macos"]
         elsif system == "aarch64-darwin"
           response["master"]["aarch64-macos"]
         else
           response["master"][system]
         end
  [system, { "url" => data["tarball"],
             "version" => response["master"]["version"],
             "sha256" => data["shasum"] }]
end
sources["master"]["latest"] = sources["master"][response["master"]["date"]]

FileUtils.cp "sources.json", "sources.json.bak"
File.write "sources.json", JSON.pretty_generate(sources)

# Local Variables:
# mode: ruby
# End: