特定のディレクトリ以下を除外して RSpec を実行する Rake タスク

rspec_core_rake_task_with_ignore_patterns.rb

require 'rspec/core/rake_task'
unless defined?(RSpec::Core::RakeTaskWithIgnorePattern)
  class RSpec::Core::RakeTaskWithIgnorePattern < RSpec::Core::RakeTask
    attr_accessor :ignore_patterns

    def setup_ivar(args)
      super

      self.ignore_pattern ||= []
    end

    def files_to_run
      original_files_to_run = super

      unless ENV.has_key?('SPEC')
        original_files_to_run.exclude(*ignore_patterns)
      end

      original_files_to_run
    end
  end
end

with_ignore_patterns.rake

ignore_patterns_file = File.expand_path('.rspec-ignore')
ignore_patterns = File.readable?(ignore_patterns_file) ? [*File.read(ignore_patterns_file).lines] : []
RSpec::Core::RakeTaskWithIgnorePattern.new(test: spec_prerequisites) do |t|
  t.ignore_patterns = ignore_patterns
end

spec/factories/**/*.rb