Contents

module LicenseFinder
  class Yarn < PackageManager
    SHELL_COMMAND = 'yarn licenses list --no-progress --json'.freeze

    def possible_package_paths
      [project_path.join('yarn.lock')]
    end

    def current_packages
      stdout, _stderr, status = Cmd.run(Yarn::SHELL_COMMAND)
      return [] unless status.success?

      packages = []
      incompatible_packages = []

      json_strings = stdout.split("\n")
      json_objects = json_strings.map { |json_object| JSON.parse(json_object) }

      if json_objects.last['type'] == 'table'
        license_json = json_objects.pop['data']
        packages = packages_from_json(license_json)
      end

      json_objects.each do |json_object|
        match = /(?<name>[\w,\-]+)@(?<version>(\d+\.?)+)/ =~ json_object['data'].to_s
        if match
          package = Package.new(name, version, spec_licenses: ['unknown'])
          incompatible_packages.push(package)
        end
      end

      packages + incompatible_packages.uniq
    end

    def self.takes_priority_over
      NPM
    end

    def self.package_management_command
      'yarn'
    end

    def self.prepare_command
      'yarn install'
    end

    private

    def packages_from_json(json_data)
      body = json_data['body']
      head = json_data['head']

      packages = body.map do |json_package|
        Hash[head.zip(json_package)]
      end

      packages.map do |package_hash|
        Package.new(package_hash['Name'], package_hash['Version'], spec_licenses: [package_hash['License']], homepage: package_hash['VendorUrl'])
      end
    end
  end
end

Version data entries

3 entries across 3 versions & 1 rubygems

Version	Path
license_finder-4.0.2	lib/license_finder/package_managers/yarn.rb
license_finder-4.0.1	lib/license_finder/package_managers/yarn.rb
license_finder-3.1.1	lib/license_finder/package_managers/yarn.rb