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#!/usr/bin/env ruby

require 'set'
require 'yaml'
require 'optparse'

options = {}
opts = OptionParser.new do |opts|
  opts.banner = "Usage: list-packages.rb [options]"
  opts.separator ""
  opts.separator "Specific options:"  
  opts.on('-r', '--release-path FILE', 'Path to release') { |v| options[:release_path] = v }
end

opts.parse!

unless options[:release_path] && File.exist?(options[:release_path])
  puts opts.help
  exit(2)
end

jobs_folders = Dir.glob(File.join(options[:release_path], 'jobs', '*')).select { |f| File.directory? f }


packages = Set.new

def extract_packages_from_spec(deps_section, packages)
  lambda do |folder|
    spec_file = File.join(folder, 'spec')
    raise "There is no spec file in #{folder}" unless File.exist?(spec_file)
    spec = YAML.load_file(spec_file)
    packages.merge(spec[deps_section]) if spec[deps_section]
  end
end


jobs_folders.each &extract_packages_from_spec('packages', packages)

packages_folders = packages.to_a.map do |package|
  File.join(options[:release_path], 'packages', package)
end

packages_folders.each &extract_packages_from_spec('dependencies', packages)


puts "List of packages:\n---\n"
puts packages.to_a.join("\n")