Class: Spoom::Deadcode::Remover::NodeContext

Inherits:
Object
  • Object
show all
Extended by:
T::Sig
Defined in:
lib/spoom/deadcode/remover.rb

Instance Attribute Summary collapse

Instance Method Summary collapse

Constructor Details

#initialize(source, node, nesting) ⇒ NodeContext

Returns a new instance of NodeContext.



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# File 'lib/spoom/deadcode/remover.rb', line 358

def initialize(source, node, nesting)
  @source = source
  @node = node
  @nesting = nesting
end

Instance Attribute Details

#nesting ⇒ Object

Returns the value of attribute nesting.



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# File 'lib/spoom/deadcode/remover.rb', line 355

def nesting
  @nesting
end

#node ⇒ Object (readonly)

Returns the value of attribute node.



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# File 'lib/spoom/deadcode/remover.rb', line 352

def node
  @node
end

Instance Method Details

#attached_comments_and_sigs ⇒ Object 



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# File 'lib/spoom/deadcode/remover.rb', line 467

def attached_comments_and_sigs
  nodes = T.let([], T::Array[SyntaxTree::Node])

  previous_nodes.reverse_each do |prev_node|
    break unless comment_for_node?(prev_node, nodes.last || node) || sorbet_signature?(prev_node)

    nodes << prev_node
  end

  nodes.reverse
end

#attached_sig ⇒ Object 



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# File 'lib/spoom/deadcode/remover.rb', line 480

def attached_sig
  previous_nodes.reverse_each do |node|
    if node.is_a?(SyntaxTree::Comment)
      next
    elsif sorbet_signature?(node)
      return T.cast(node, SyntaxTree::MethodAddBlock)
    else
      break
    end
  end

  nil
end

#comment_for_node?(comment, node) ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'lib/spoom/deadcode/remover.rb', line 460

def comment_for_node?(comment, node)
  return false unless comment.is_a?(SyntaxTree::Comment)

  comment.location.end_line == node.location.start_line - 1
end

#next_node ⇒ Object 



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# File 'lib/spoom/deadcode/remover.rb', line 407

def next_node
  next_nodes.first
end

#next_nodes ⇒ Object 



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# File 'lib/spoom/deadcode/remover.rb', line 397

def next_nodes
  parent = parent_node

  index = parent.child_nodes.index(node)
  raise "Node #{@node} not found in nesting node #{parent}" unless index

  parent.child_nodes[(index + 1)..-1].reject { |node| node.is_a?(SyntaxTree::VoidStmt) }
end

#node_string(node) ⇒ Object 



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# File 'lib/spoom/deadcode/remover.rb', line 495

def node_string(node)
  case node
  when Symbol
    node.to_s
  else
    T.must(@source[node.location.start_char...node.location.end_char])
  end
end

#parent_context ⇒ Object 



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# File 'lib/spoom/deadcode/remover.rb', line 373

def parent_context
  nesting = @nesting.dup
  parent = nesting.pop
  raise "No parent context for node #{@node}" unless parent

  NodeContext.new(@source, parent, nesting)
end

#parent_node ⇒ Object 



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# File 'lib/spoom/deadcode/remover.rb', line 365

def parent_node
  parent = @nesting.last
  raise "No parent for node #{node}" unless parent

  parent
end

#previous_node ⇒ Object 



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# File 'lib/spoom/deadcode/remover.rb', line 392

def previous_node
  previous_nodes.last
end

#previous_nodes ⇒ Object 



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# File 'lib/spoom/deadcode/remover.rb', line 382

def previous_nodes
  parent = parent_node

  index = parent.child_nodes.index(@node)
  raise "Node #{@node} not found in parent #{parent}" unless index

  parent.child_nodes[0...index].reject { |child| child.is_a?(SyntaxTree::VoidStmt) }
end

#sclass_context ⇒ Object 



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# File 'lib/spoom/deadcode/remover.rb', line 412

def sclass_context
  sclass = T.let(nil, T.nilable(SyntaxTree::SClass))

  nesting = @nesting.dup
  until nesting.empty? || sclass
    node = nesting.pop
    next unless node.is_a?(SyntaxTree::SClass)

    sclass = node
  end

  return unless sclass.is_a?(SyntaxTree::SClass)

  nodes = sclass.bodystmt.statements.body.reject do |node|
    node.is_a?(SyntaxTree::VoidStmt) || node.is_a?(SyntaxTree::Comment) ||
      sorbet_signature?(node) || sorbet_extend_sig?(node)
  end

  if nodes.size <= 1
    return NodeContext.new(@source, sclass, nesting)
  end

  nil
end

#sorbet_extend_sig?(node) ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'lib/spoom/deadcode/remover.rb', line 451

def sorbet_extend_sig?(node)
  return false unless node.is_a?(SyntaxTree::Command)
  return false unless node_string(node.message) == "extend"
  return false unless node.arguments.parts.size == 1

  node_string(T.must(node.arguments.parts.first)) == "T::Sig"
end

#sorbet_signature?(node) ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'lib/spoom/deadcode/remover.rb', line 438

def sorbet_signature?(node)
  return false unless node.is_a?(SyntaxTree::MethodAddBlock)

  call = node.call
  return false unless call.is_a?(SyntaxTree::CallNode)

  ident = call.message
  return false unless ident.is_a?(SyntaxTree::Ident)

  ident.value == "sig"
end