Class: Spoom::Sorbet::Metrics::CodeMetricsVisitor

Inherits:
Visitor
  • Object
show all
Includes:
RBS::ExtractRBSComments
Defined in:
lib/spoom/sorbet/metrics/code_metrics_visitor.rb

Overview

Collects metrics about how Sorbet is used in the codebase.

This approach is different from the metrics file we get directly from Sorbet.

This visitor actually visits the codebase and collects metrics about the amount of signatures, T. calls, and other metrics. It also knows about RBS comments.

On the other hand, the metrics file is a snapshot of the metrics at type checking time and knows about is calls are typed, how many assertions are done, etc.

Instance Method Summary collapse

Methods included from RBS::ExtractRBSComments

#node_rbs_comments

Methods inherited from Visitor

#visit_alias_global_variable_node, #visit_alias_method_node, #visit_alternation_pattern_node, #visit_and_node, #visit_arguments_node, #visit_array_node, #visit_array_pattern_node, #visit_assoc_node, #visit_assoc_splat_node, #visit_back_reference_read_node, #visit_begin_node, #visit_block_argument_node, #visit_block_local_variable_node, #visit_block_node, #visit_block_parameter_node, #visit_block_parameters_node, #visit_break_node, #visit_call_and_write_node, #visit_call_operator_write_node, #visit_call_or_write_node, #visit_call_target_node, #visit_capture_pattern_node, #visit_case_match_node, #visit_case_node, #visit_child_nodes, #visit_class_variable_and_write_node, #visit_class_variable_operator_write_node, #visit_class_variable_or_write_node, #visit_class_variable_read_node, #visit_class_variable_target_node, #visit_class_variable_write_node, #visit_constant_and_write_node, #visit_constant_operator_write_node, #visit_constant_or_write_node, #visit_constant_path_and_write_node, #visit_constant_path_node, #visit_constant_path_operator_write_node, #visit_constant_path_or_write_node, #visit_constant_path_target_node, #visit_constant_path_write_node, #visit_constant_read_node, #visit_constant_target_node, #visit_constant_write_node, #visit_defined_node, #visit_else_node, #visit_embedded_statements_node, #visit_embedded_variable_node, #visit_ensure_node, #visit_false_node, #visit_find_pattern_node, #visit_flip_flop_node, #visit_float_node, #visit_for_node, #visit_forwarding_arguments_node, #visit_forwarding_parameter_node, #visit_forwarding_super_node, #visit_global_variable_and_write_node, #visit_global_variable_operator_write_node, #visit_global_variable_or_write_node, #visit_global_variable_read_node, #visit_global_variable_target_node, #visit_global_variable_write_node, #visit_hash_node, #visit_hash_pattern_node, #visit_if_node, #visit_imaginary_node, #visit_implicit_node, #visit_implicit_rest_node, #visit_in_node, #visit_index_and_write_node, #visit_index_operator_write_node, #visit_index_or_write_node, #visit_index_target_node, #visit_instance_variable_and_write_node, #visit_instance_variable_operator_write_node, #visit_instance_variable_or_write_node, #visit_instance_variable_read_node, #visit_instance_variable_target_node, #visit_instance_variable_write_node, #visit_integer_node, #visit_interpolated_match_last_line_node, #visit_interpolated_regular_expression_node, #visit_interpolated_string_node, #visit_interpolated_symbol_node, #visit_interpolated_x_string_node, #visit_keyword_hash_node, #visit_keyword_rest_parameter_node, #visit_lambda_node, #visit_local_variable_and_write_node, #visit_local_variable_operator_write_node, #visit_local_variable_or_write_node, #visit_local_variable_read_node, #visit_local_variable_target_node, #visit_local_variable_write_node, #visit_match_last_line_node, #visit_match_predicate_node, #visit_match_required_node, #visit_match_write_node, #visit_missing_node, #visit_multi_target_node, #visit_multi_write_node, #visit_next_node, #visit_nil_node, #visit_no_keywords_parameter_node, #visit_numbered_parameters_node, #visit_numbered_reference_read_node, #visit_optional_keyword_parameter_node, #visit_optional_parameter_node, #visit_or_node, #visit_parameters_node, #visit_parentheses_node, #visit_pinned_expression_node, #visit_pinned_variable_node, #visit_post_execution_node, #visit_pre_execution_node, #visit_program_node, #visit_range_node, #visit_rational_node, #visit_redo_node, #visit_regular_expression_node, #visit_required_keyword_parameter_node, #visit_required_parameter_node, #visit_rescue_modifier_node, #visit_rescue_node, #visit_rest_parameter_node, #visit_retry_node, #visit_return_node, #visit_self_node, #visit_source_encoding_node, #visit_source_file_node, #visit_source_line_node, #visit_splat_node, #visit_statements_node, #visit_string_node, #visit_super_node, #visit_symbol_node, #visit_true_node, #visit_undef_node, #visit_unless_node, #visit_until_node, #visit_when_node, #visit_while_node, #visit_x_string_node, #visit_yield_node

Constructor Details

#initialize(counters) ⇒ CodeMetricsVisitor

Returns a new instance of CodeMetricsVisitor.

Signature:

  • (Spoom::Counters) -> void



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# File 'lib/spoom/sorbet/metrics/code_metrics_visitor.rb', line 38

def initialize(counters)
  super()

  @counters = counters

  @last_sigs = [] #: Array[Prism::CallNode]
  @type_params = [] #: Array[Prism::CallNode]
end

Instance Method Details

#visit(node) ⇒ Object

Signature:

  • (Prism::Node?) -> void



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# File 'lib/spoom/sorbet/metrics/code_metrics_visitor.rb', line 49

def visit(node)
  return if node.nil?

  node.location.trailing_comments.each do |comment|
    text = comment.slice.strip
    next unless text.start_with?("#:")

    @counters.increment("rbs_assertions")

    case text
    when /^#: as !nil/
      @counters.increment("rbs_must")
    when /^#: as untyped/
      @counters.increment("rbs_unsafe")
    when /^#: as/
      @counters.increment("rbs_cast")
    when /^#:/
      @counters.increment("rbs_let")
    end
  end

  super
end

#visit_call_node(node) ⇒ Object

Signature:

  • (Prism::CallNode) -> void



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# File 'lib/spoom/sorbet/metrics/code_metrics_visitor.rb', line 131

def visit_call_node(node)
  @counters.increment("calls")

  case node.name
  when :attr_accessor, :attr_reader, :attr_writer
    visit_attr_accessor(node)
    return
  when :sig
    visit_sig(node)
    return
  when :type_member, :type_template
    visit_type_member(node)
    return
  end

  case node.receiver&.slice
  when /^(::)?T$/
    @counters.increment("T_calls")
    @counters.increment("T.#{node.name}")
  end

  super
end

#visit_class_node(node) ⇒ Object

Signature:

  • (Prism::ClassNode) -> void



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# File 'lib/spoom/sorbet/metrics/code_metrics_visitor.rb', line 75

def visit_class_node(node)
  case node.superclass&.slice
  when /^(::)?T::Struct$/
    @counters.increment("t_structs")
  when /^(::)?T::Enum$/
    @counters.increment("t_enums")
  end

  visit_scope(node) do
    super
  end
end

#visit_def_node(node) ⇒ Object

Signature:

  • (Prism::DefNode) -> void



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# File 'lib/spoom/sorbet/metrics/code_metrics_visitor.rb', line 106

def visit_def_node(node)
  unless node.name.to_s.start_with?("test_")
    @counters.increment("methods")

    rbs_sigs = node_rbs_comments(node).signatures
    srb_sigs = collect_last_srb_sigs

    if rbs_sigs.any?
      @counters.increment("methods_with_rbs_sig")
    end

    if srb_sigs.any?
      @counters.increment("methods_with_srb_sig")
    end

    if rbs_sigs.empty? && srb_sigs.empty?
      @counters.increment("methods_without_sig")
    end
  end

  super
end

#visit_module_node(node) ⇒ Object

Signature:

  • (Prism::ModuleNode) -> void



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# File 'lib/spoom/sorbet/metrics/code_metrics_visitor.rb', line 90

def visit_module_node(node)
  visit_scope(node) do
    super
  end
end

#visit_singleton_class_node(node) ⇒ Object

Signature:

  • (Prism::SingletonClassNode) -> void



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# File 'lib/spoom/sorbet/metrics/code_metrics_visitor.rb', line 98

def visit_singleton_class_node(node)
  visit_scope(node) do
    super
  end
end