Class: Spoom::Sorbet::Assertions

Inherits:
Object
  • Object
show all
Defined in:
lib/spoom/sorbet/assertions.rb

Defined Under Namespace

Classes: AssignNode, Locator

Constant Summary collapse

AssignType = 
T.type_alias do
  T.any(
    Prism::ClassVariableAndWriteNode,
    Prism::ClassVariableOrWriteNode,
    Prism::ClassVariableOperatorWriteNode,
    Prism::ClassVariableWriteNode,
    Prism::ConstantAndWriteNode,
    Prism::ConstantOrWriteNode,
    Prism::ConstantOperatorWriteNode,
    Prism::ConstantWriteNode,
    Prism::ConstantPathAndWriteNode,
    Prism::ConstantPathOrWriteNode,
    Prism::ConstantPathOperatorWriteNode,
    Prism::ConstantPathWriteNode,
    Prism::GlobalVariableAndWriteNode,
    Prism::GlobalVariableOrWriteNode,
    Prism::GlobalVariableOperatorWriteNode,
    Prism::GlobalVariableWriteNode,
    Prism::InstanceVariableAndWriteNode,
    Prism::InstanceVariableOperatorWriteNode,
    Prism::InstanceVariableOrWriteNode,
    Prism::InstanceVariableWriteNode,
    Prism::LocalVariableAndWriteNode,
    Prism::LocalVariableOperatorWriteNode,
    Prism::LocalVariableOrWriteNode,
    Prism::LocalVariableWriteNode,
  )
end

Class Method Summary collapse

Class Method Details

.rbi_to_rbs(ruby_contents, file:) ⇒ Object

: (String, file: String) -> String



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# File 'lib/spoom/sorbet/assertions.rb', line 11

def rbi_to_rbs(ruby_contents, file:)
  old_encoding = ruby_contents.encoding
  ruby_contents = ruby_contents.encode("UTF-8") unless old_encoding == "UTF-8"
  ruby_bytes = ruby_contents.bytes

  assigns = collect_assigns(ruby_contents, file: file)

  assigns.reverse.each do |assign|
    # Adjust the end offset to locate the end of the line:
    #
    # So this:
    #
    #     (a = T.let(nil, T.nilable(String)))
    #
    # properly becomes:
    #
    #     (a = nil) #: String?
    #
    # This is important to avoid translating the `nil` as `nil` instead of `nil #: String?`
    end_offset = assign.node.location.end_offset
    end_offset += 1 while (ruby_bytes[end_offset] != "\n".ord) && (end_offset < ruby_bytes.size)
    T.unsafe(ruby_bytes).insert(end_offset, *" #: #{assign.rbs_type}".bytes)

    # Rewrite the value
    start_offset = assign.operator_loc.end_offset
    end_offset = assign.node.value.location.start_offset + assign.node.value.location.length
    ruby_bytes[start_offset...end_offset] = " #{dedent_value(assign)}".bytes
  end

  ruby_bytes.pack("C*").force_encoding(old_encoding)
end