module ArchSpec::Facts

# File lib/archspec/facts.rb, line 29
def load_into(graph, directory)
  paths = Dir.glob(File.join(File.expand_path(directory, graph.root), '*.yml')).sort
  raise Error, "no facts found in #{directory}; run `archspec reflect` or your facts producer" if paths.empty?

  current = snapshot(graph, excluding: directory)
  paths.each do |path|
    document = YAML.safe_load_file(path, permitted_classes: [], aliases: false)
    validate_document(document, path, current)
    apply_document(graph, document, path)
  end
  graph.clear_method_caches
rescue Psych::Exception, SystemCallError => error
  raise Error, "could not load facts: #{error.message}"
end

# File lib/archspec/facts.rb, line 18
def snapshot(graph, excluding: 'archspec_facts')
  excluded = File.expand_path(excluding, graph.root)
  inputs = Dir.glob(File.join(graph.root, 'config/**/*.{rb,yml,yaml}')) +
           Dir.glob(File.join(graph.root, '{Gemfile,Gemfile.lock,*.gemspec,.ruby-version}'))
  (graph.files.keys + inputs).select { |path| File.file?(path) }
    .reject { |path| path == excluded || path.start_with?("#{excluded}/") }
    .uniq.sort.to_h do |path|
      [Pathname(path).relative_path_from(Pathname(graph.root)).to_s, Digest::SHA256.file(path).hexdigest]
    end
end

# File lib/archspec/facts.rb, line 44
def write(path, document)
  FileUtils.mkdir_p(File.dirname(path))
  Tempfile.create(['.archspec-facts-', '.yml'], File.dirname(path)) do |file|
    file.write(document.to_yaml)
    file.flush
    file.close
    File.rename(file.path, path)
  end
rescue SystemCallError => error
  raise Error, "could not write facts #{path}: #{error.message}"
end