rspec.rb

# typed: true

module Packs
  module Rails
    module Integrations
      class RSpec
        extend T::Sig

        def initialize
          # This is the list of directories RSpec was told to run.
          to_run = ::RSpec.configuration.instance_variable_get(:@files_or_directories_to_run)
          default_path = ::RSpec.configuration.default_path

          if to_run == [default_path]
            # This is the default case when you run `rspec`. We want to add all the pack's spec paths
            # to the collection of directories to run.

            pack_paths = Packs.all.map do |pack|
              next if pack.is_gem?

              spec_path = pack.relative_path.join(default_path)
              spec_path.to_s if spec_path.exist?
            end

            to_run.concat(pack_paths)
          else
            # This is when `rspec` is run with a list of directories or files. We scan this list to see
            # if any of them matches a pack's directory. If it does, we concat the `default_path` to the
            # end of it.
            #
            # packs/my_pack => packs/my_pack/spec
            #
            # If it doesn't match a pack path, we leave it alone.

            to_run.map! do |path|
              if (pack = Packs.find(path))
                [
                  pack,
                  *nested_packs_for(pack)
                ].map do |pack|
                  spec_path = pack.relative_path.join(default_path)
                  spec_path.to_s if spec_path.exist?
                end
              else
                path
              end
            end
          end

          ::RSpec.configuration.files_or_directories_to_run = to_run.flatten.compact.uniq
        end

        sig { params(parent_pack: Packs::Pack).returns(T::Array[Packs::Pack]) }
        def nested_packs_for(parent_pack)
          Packs.all.select do |pack|
            pack.name != parent_pack.name && pack.name.include?(parent_pack.name)
          end
        end
      end
    end
  end
end