manifesto

Gemfile

# A sample Gemfile
source "https://rubygems.org"

gem "nokogiri"

Gemfile.lock

GEM
  remote: https://rubygems.org/
  specs:
    nokogiri (1.5.6)

PLATFORMS
  ruby

DEPENDENCIES
  nokogiri

manifest.rb

#!/usr/bin/env ruby
#
# create a manifest file
#
# usage manifest.rb /path/to/root/ name_of_xml.xml

require 'bundler/setup'
require 'find'
require 'nokogiri'
require 'digest/sha2'

root = ARGV.shift || raise("Need a root")
xml_file = ARGV.shift || raise("Need an xml file")
builder = Nokogiri::XML::Builder.new do |xml|
  xml.files do
    Find::find(root) do |inode|
      next if FileTest.directory?(inode)
      xml.file(size: FileTest.size(inode), sha256: Digest::SHA256.hexdigest(File.read(inode)), name: inode)
    end
  end
end

File.open(xml_file, File::CREAT|File::TRUNC|File::WRONLY) do |f|
  f.puts builder.to_xml
end