Rakefile

require 'json'
require "active_support/all"

module Unpoly
  module Rails
    class Release
      class << self
        def npm_version(extension: true)
          package_json_path = 'assets/unpoly-dev/package.json'
          package_json_content = File.read(package_json_path)
          package_info = JSON.parse(package_json_content)
          version = package_info['version'].presence
          version or raise Error, "Cannot parse { version } from #{package_json_path}"
          process_extension(version, extension)
        end

        def gem_version(extension: true)
          require_relative 'lib/unpoly/rails/version'
          version = Unpoly::Rails::VERSION
          process_extension(version, extension)
        end

        def pre_release?
          version =~ /rc|beta|pre|alpha/
        end

        def process_extension(version, extension)
          if version
            if extension
              version
            elsif version =~ /^\d+\.\d+\.\d+/
              Regexp.last_match(0)
            else
              raise "Cannot parse Semver version: #{version.inspect}"
            end
          end
        end

      end
    end
  end
end


namespace :gem do
  require "bundler/gem_tasks"

  desc "Prompt user to confirm that they're ready"
  task :confirm do
    puts "You are about to release unpoly-rails version #{Unpoly::Rails::Release.gem_version} to RubyGems:"
    puts
    puts "Before continuing, make sure the following tasks are done:"
    puts
    puts "- The files in ../unpoly/dist are the latest build for version #{Unpoly::Rails::Release.gem_version(extension: false)}"
    puts "- The files in ../unpoly/dist don't have files left over from another version (clean with `rake release:clean`)"
    puts "- You have released a new version of the unpoly npm package"
    puts "- You have bumped the version in lib/unpoly/rails/version.rb to match that of Unpoly's package.json"
    puts "- You have committed and pushed the changes"
    puts
    puts "Continuing will publish a new version to RubyGems."
    puts
    puts "Continue now? [y/N] "
    reply = STDIN.gets.strip.downcase
    unless reply == 'y'
      puts "Aborted."
      exit
    end
  end
  Rake::Task['gem:release:rubygem_push'].enhance ['gem:confirm']

  desc 'Ensure that package.js and version.rb have the same version'
  task :ensure_synced_versions do
    unextended_gem_version = Unpoly::Rails::Release.gem_version(extension: false)
    unextended_npm_version = Unpoly::Rails::Release.npm_version(extension: false)

    unless unextended_gem_version == unextended_npm_version
      raise "Gem version (#{unextended_gem_version}) does not match npm version (#{unextended_npm_version})"
    end
  end
  Rake::Task['gem:build'].enhance ['gem:ensure_synced_versions']

  desc 'Copy symlinked development assets for packaging'
  task :copy_assets do
    # Remove files from a previous build
    Dir.glob('assets/unpoly/*.{css,js}').each do |file|
      File.delete(file)
    end

    Dir['assets/unpoly-dev/unpoly*.{css,js}'].each do |path|
      FileUtils.cp path, 'assets/unpoly'
    end
  end
  Rake::Task['gem:build'].enhance ['gem:copy_assets']

  task :explain_frozen_shell do
    puts 'Publishing to rubygems.org. If this seems to freeze, enter your 2FA token.'
  end
  Rake::Task['gem:release:rubygem_push'].enhance ['gem:explain_frozen_shell']

end