class RubyIndexer::Configuration

def initial_excluded_gems
  excluded, others = Bundler.definition.dependencies.partition do |dependency|
    dependency.groups == [:development]
  end
  # When working on a gem, we need to make sure that its gemspec dependencies can't be excluded. This is necessary
  # because Bundler doesn't assign groups to gemspec dependencies
  #
  # If the dependency is prerelease, `to_spec` may return `nil` due to a bug in older version of Bundler/RubyGems:
  # https://github.com/Shopify/ruby-lsp/issues/1246
  this_gem = Bundler.definition.dependencies.find do |d|
    d.to_spec&.full_gem_path == Dir.pwd
  rescue Gem::MissingSpecError
    false
  end
  others.concat(this_gem.to_spec.dependencies) if this_gem
  excluded.each do |dependency|
    next unless dependency.runtime?
    spec = dependency.to_spec
    next unless spec
    spec.dependencies.each do |transitive_dependency|
      # If the transitive dependency is included in other groups, skip it
      next if others.any? { |d| d.name == transitive_dependency.name }
      # If the transitive dependency is included as a transitive dependency of a gem outside of the development
      # group, skip it
      next if others.any? { |d| d.to_spec&.dependencies&.include?(transitive_dependency) }
      excluded << transitive_dependency
    end
  rescue Gem::MissingSpecError
    # If a gem is scoped only to some specific platform, then its dependencies may not be installed either, but they
    # are still listed in dependencies. We can't index them because they are not installed for the platform, so we
    # just ignore if they're missing
  end
  excluded.uniq!
  excluded.map(&:name)
end