Class: Claret::Rewriters::MethodArgIvarRewriter

Inherits:
RubyNext::Language::Rewriters::Text
  • Object
show all
Includes:
Utils::Logging
Defined in:
lib/claret/rewriters/2_method_arg_ivar_rewriter.rb

Constant Summary collapse

NAME = 
"claret-ivar-arg"
SYNTAX_PROBE =

Must be run after the MethodDefRewriter

"def foo(@a, @b, @c = :foo)"
MIN_SUPPORTED_VERSION = 
Gem::Version.new(RubyNext::NEXT_VERSION)

Instance Method Summary collapse

Methods included from Utils::Logging

#debug, #logger, #say

Instance Method Details

#safe_rewrite(source) ⇒ Object 



16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
 
# File 'lib/claret/rewriters/2_method_arg_ivar_rewriter.rb', line 16

def safe_rewrite(source)
  modified_source = source.dup

  source.scan(/(def\s+[\w_]+\s*)([^#]*)/).each do |method_def_match|
    debug "> Method def match: #{method_def_match.inspect}"

    method_def_match = method_def_match.join
    scanner = StringScanner.new method_def_match
    stack = Claret::Parsing::Parens.new(scanner).parse

    next if stack.size < 2

    debug "> Parsing arguments:"
    debug stack.inspect

    ivars_lines = stack.last.map do |arg_def|
      debug "> Arg def: #{arg_def}"
      arg_str = if arg_def.is_a?(String)
        arg_def = arg_def.strip
        if arg_def[0] == "@"
          debug "> ivar def: #{arg_def}"
          arg_def[1..-1]
        end
      elsif arg_def.is_a?(Array) && arg_def.first
        arg_def = arg_def.first.strip
        if arg_def[0] == "@"
          debug "> ivar def: #{arg_def}"
          arg_def.first[1..-1]
        end
      end
      next unless arg_str
      arg_name = arg_str.match(/[\w_]+/).to_s

      debug "> Set: @#{arg_name}"

      modified_source.gsub!(arg_def, arg_def[1..-1])
      method_def_match.gsub!(arg_def, arg_def[1..-1])
      "@#{arg_name} = #{arg_name}"
    end

    ivars_lines.compact!

    # Mark file dirty
    context.track! self

    debug "> Add setters: #{ivars_lines.join("\n")}"
    # Ensure to capture whole of line inc comments and then add ivar lines at end
    modified_source.gsub!(/#{Regexp.escape(method_def_match)}(.*)$/, "#{method_def_match}\\1#{ivars_lines.map { "\n#{_1}" }.join}")
  end

  modified_source
end