Class: RipperTags::Parser

Inherits:
Ripper
  • Object
show all
Defined in:
lib/ripper-tags/parser.rb

Class Method Summary collapse

Instance Method Summary collapse

Class Method Details

.extract(data, file = '(eval)') ⇒ Object 



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# File 'lib/ripper-tags/parser.rb', line 6

def self.extract(data, file='(eval)')
  sexp = new(data, file).parse
  Visitor.new(sexp, file, data).tags
end

Instance Method Details

#on_alias(lhs, rhs) ⇒ Object 



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# File 'lib/ripper-tags/parser.rb', line 38

def on_alias(lhs, rhs)
  if lhs && rhs
    name, other = lhs[0], rhs[0]
    name = name[0] if Array === name
    other = other[0] if Array === other
    line = rhs[1]
    [:alias, name, other, line]
  end
end

#on_aref_field(*args) ⇒ Object 



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# File 'lib/ripper-tags/parser.rb', line 60

def on_aref_field(*args)
  [:aref_field, *args]
end

#on_args_add(sub, arg) ⇒ Object 



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# File 'lib/ripper-tags/parser.rb', line 275

def on_args_add(sub, arg)
  if sub
    sub + [arg]
  else
    [:args, arg].compact
  end
end

#on_array(args) ⇒ Object 



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# File 'lib/ripper-tags/parser.rb', line 121

def on_array(args)
  if args.is_a?(Array) && args[0] == :args
    args[1..-1]
  end
end

#on_assign(lhs, rhs) ⇒ Object 



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# File 'lib/ripper-tags/parser.rb', line 47

def on_assign(lhs, rhs)
  return if lhs.nil?
  return if lhs[0] == :field
  return if lhs[0] == :aref_field
  lhs, line = lhs
  [:assign, lhs, rhs, line]
end

#on_assoc_new(key, value) ⇒ Object

Otherwise hashes and keyword arguments turn into a list of their keys only



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# File 'lib/ripper-tags/parser.rb', line 305

def on_assoc_new(key, value)
  [:assoc, key, value]
end

#on_binary(*args) ⇒ Object 



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# File 'lib/ripper-tags/parser.rb', line 71

def on_binary(*args)
end

#on_bodystmt(*args) ⇒ Object 



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# File 'lib/ripper-tags/parser.rb', line 101

def on_bodystmt(*args)
  args
end

#on_call(lhs, op, rhs) ⇒ Object 



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# File 'lib/ripper-tags/parser.rb', line 165

def on_call(lhs, op, rhs)
  return unless lhs && rhs
  arg = block = nil
  [:call, lhs[0], rhs[0], arg, block]
end

#on_class(name, superclass, body) ⇒ Object 



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# File 'lib/ripper-tags/parser.rb', line 27

def on_class(name, superclass, body)
  superclass.flatten!(1) if superclass
  [:class, name, superclass, *body.compact]
end

#on_command(name, *args) ⇒ Object 



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# File 'lib/ripper-tags/parser.rb', line 74

def on_command(name, *args)
  case name[0]
  when "define_method", "alias_method",
       "has_one", "has_many",
       "belongs_to", "has_and_belongs_to_many",
       "scope", "named_scope",
       "public_class_method", "private_class_method", "protected_class_method",
       "public", "protected", "private",
       "module_function",
       /^[mc]?attr_(accessor|reader|writer)$/
    on_method_add_arg([:fcall, name], args[0])
  when "delegate"
    on_delegate(*Array(args[0])[1..-1])
  when "def_delegator", "def_instance_delegator"
    on_def_delegator(*args[0][1..-1])
  when "def_delegators", "def_instance_delegators"
    on_def_delegators(*args[0][1..-1])
  else
    if args[0].respond_to?(:[])
      # Handle decorators: if what follows is a method def, pass it on
      inner = args[0][1]
      if inner.respond_to?(:[]) && inner[0] == :def
        on_def(inner[1..-1], nil, nil)
      end
    end
  end
end

#on_command_call(*args) ⇒ Object

handle ‘Class.new arg` call without parens



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# File 'lib/ripper-tags/parser.rb', line 261

def on_command_call(*args)
  if args.last && :args == args.last[0]
    args_add = args.pop
    call = on_call(*args)
    on_method_add_arg(call, args_add)
  else
    super
  end
end

#on_const_path_ref(a, b) ⇒ Object Also known as: on_const_path_field 



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# File 'lib/ripper-tags/parser.rb', line 64

def on_const_path_ref(a, b)
  return if a.nil? || b.nil?
  a.flatten!(1)
  [[a && a[0], b[0]].join('::'), b[1]]
end

#on_def(method, args, body) ⇒ Object 



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# File 'lib/ripper-tags/parser.rb', line 31

def on_def(method, args, body)
  [:def, *method]
end

#on_def_delegator(*args) ⇒ Object 



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# File 'lib/ripper-tags/parser.rb', line 329

def on_def_delegator(*args)
  name, lineno = args.last
  [:def, name, lineno] if lineno
end

#on_def_delegators(*args) ⇒ Object 



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# File 'lib/ripper-tags/parser.rb', line 334

def on_def_delegators(*args)
  _target, *names = args
  names.map do |name, lineno, *args|
    if lineno.is_a?(Numeric)
      [:def, name, lineno] if lineno
    elsif name.is_a?(Symbol)
      [name, lineno, *args]
    end
  end
end

#on_defs(receiver, op, method, args, body) ⇒ Object 



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# File 'lib/ripper-tags/parser.rb', line 34

def on_defs(receiver, op, method, args, body)
  receiver.flatten!(1) if receiver
  [:defs, receiver && receiver[0], *method]
end

#on_delegate(*args) ⇒ Object 



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# File 'lib/ripper-tags/parser.rb', line 309

def on_delegate(*args)
  method_names = args.select { |arg| arg.first.is_a? String }
  options = args.select { |arg| arg.first.is_a?(Array) && arg.first.first == :assoc }.flatten(1)
  options = Hash[options.map { |_assoc, key, val| [key[0], val[0]] if key }.compact]

  target = options["to:"] || options["to"] # When using hashrocket syntax there is no ':'
  prefix = options["prefix:"] || options["prefix"]
  method_prefix = if prefix.is_a?(Array) && prefix.first == "true"
                    "#{target}_"
                  elsif prefix.is_a? String
                    "#{prefix}_"
                  else
                    ""
                  end

  method_names.map do |name, lineno|
    [:def, "#{method_prefix}#{name}", lineno]
  end
end

#on_do_block(*args) ⇒ Object 



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# File 'lib/ripper-tags/parser.rb', line 283

def on_do_block(*args)
  args
end

#on_dyna_symbol(*args) ⇒ Object 



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# File 'lib/ripper-tags/parser.rb', line 115

def on_dyna_symbol(*args)
  if args.length == 1 && args[0]
    [args[0], lineno]
  end
end

#on_fcall(*args) ⇒ Object 



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# File 'lib/ripper-tags/parser.rb', line 271

def on_fcall(*args)
  [:fcall, *args]
end

#on_field(lhs, op, rhs) ⇒ Object 



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# File 'lib/ripper-tags/parser.rb', line 57

def on_field(lhs, op, rhs)
  [:field, lhs && lhs[0], rhs[0], rhs[1]]
end

#on_hash(args) ⇒ Object 



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# File 'lib/ripper-tags/parser.rb', line 127

def on_hash(args)
  return unless args

  args.select { |arg| arg.is_a?(Array) && arg[0] == :assoc }.map { |_assoc, k, _v| k }
end

#on_if(condition, success, failure) ⇒ Object Also known as: on_unless 



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# File 'lib/ripper-tags/parser.rb', line 104

def on_if(condition, success, failure)
  ret = [success, failure].flatten(1).compact
  ret.any?? ret : nil
end

#on_method_add_arg(call, args) ⇒ Object 



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# File 'lib/ripper-tags/parser.rb', line 171

def on_method_add_arg(call, args)
  call_name = call && call[0]
  first_arg = args && :args == args[0] && args[1]

  if :call == call_name && first_arg
    if args.length == 2
      # augment call if a single argument was used
      call = call.dup
      call[3] = args[1]
    end
    call
  elsif :fcall == call_name && first_arg
    name, line = call[1]
    case name
    when "alias_method"
      if args[1] && String === args[1][0] && args[2] && String === args[2][0]
        [:alias, args[1][0], args[2][0], line]
      end
    when "define_method"
      [:def, args[1][0], line] if String === args[1][0]
    when "public_class_method", "private_class_method", "protected_class_method", "private", "public", "protected"
      access = name.sub("_class_method", "")
      klass = name == access ? nil : 'self'
      procedure = :def_with_access

      if args[1][0].is_a?(String)
        procedure = :redefine_access
        method_name = args[1][0]
      elsif args[1][1] == 'self'
        method_name = args[1][2]
      else
        klass = nil
        method_name = args[1][1]
      end

      [procedure, klass, method_name, access, line]
    when "module_function"
      access = "public"
      klass = "self"
      procedure = :def_with_access

      if args[1][0].is_a?(String)
        procedure = :redefine_access
        method_name = args[1][0]
      else
        method_name = args[1][1]
      end

      [procedure, klass, method_name, access, line]
    when "scope", "named_scope"
      scope_name = args[1][0]
      [:rails_def, :scope, scope_name, line] if scope_name
    when /^[mc]?attr_(accessor|reader|writer)$/
      gen_reader = $1 != 'writer'
      gen_writer = $1 != 'reader'
      args[1..-1].compact.inject([]) do |gen, arg|
        gen << [:def, arg[0], line] if gen_reader
        gen << [:def, "#{arg[0]}=", line] if gen_writer
        gen
      end
    when "has_many", "has_and_belongs_to_many"
      a = args[1][0]
      kind = name.to_sym
      gen = []
      unless a.is_a?(Enumerable) && !a.is_a?(String)
        a = a.to_s
        gen << [:rails_def, kind, a, line]
        gen << [:rails_def, kind, "#{a}=", line]
        if (sing = a.chomp('s')) != a
          # poor man's singularize
          gen << [:rails_def, kind, "#{sing}_ids", line]
          gen << [:rails_def, kind, "#{sing}_ids=", line]
        end
      end
      gen
    when "belongs_to", "has_one"
      a = args[1][0]
      unless a.is_a?(Enumerable) && !a.is_a?(String)
        kind = name.to_sym
        %W[ #{a} #{a}= build_#{a} create_#{a} create_#{a}! ].inject([]) do |all, ident|
          all << [:rails_def, kind, ident, line]
        end
      end
    end
  else
    super
  end
end

#on_method_add_block(method, body) ⇒ Object 



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# File 'lib/ripper-tags/parser.rb', line 287

def on_method_add_block(method, body)
  return unless method
  if %w[class_eval module_eval].include?(method[2]) && body
    [:class_eval, [
      method[1].is_a?(Array) ? method[1][0] : method[1],
      method[3]
    ], body.last]
  elsif :call == method[0] && body
    # augment the `Class.new/Struct.new` call with associated block
    call = method.dup
    call[4] = body.last
    call
  else
    super
  end
end

#on_module(name, body) ⇒ Object 



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# File 'lib/ripper-tags/parser.rb', line 24

def on_module(name, body)
  [:module, name, *body.compact]
end

#on_sclass(name, body) ⇒ Object 



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# File 'lib/ripper-tags/parser.rb', line 54

def on_sclass(name, body)
  [:sclass, name && name.flatten(1), *body.compact]
end

#on_stmts_add(first, *rest) ⇒ Object 



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# File 'lib/ripper-tags/parser.rb', line 19

def on_stmts_add(first, *rest)
  return if first == :~
  Array(first) + rest.compact
end

#on_string_add(*args) ⇒ Object 



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# File 'lib/ripper-tags/parser.rb', line 138

def on_string_add(*args)
  [args[1], lineno]
end

#on_string_dvar ⇒ Object 



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# File 'lib/ripper-tags/parser.rb', line 145

def on_string_dvar(*)
  :string_embexpr
end

#on_string_embexpr ⇒ Object 



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# File 'lib/ripper-tags/parser.rb', line 142

def on_string_embexpr(*)
  :string_embexpr
end

#on_string_literal(*args) ⇒ Object 



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# File 'lib/ripper-tags/parser.rb', line 148

def on_string_literal(*args)
  args = args.flatten
  args unless args.include?(:string_embexpr)
end

#on_tstring_content(str) ⇒ Object 



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# File 'lib/ripper-tags/parser.rb', line 134

def on_tstring_content(str)
  str
end

#on_unless_mod(condition, success) ⇒ Object Also known as: on_if_mod 



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# File 'lib/ripper-tags/parser.rb', line 110

def on_unless_mod(condition, success)
  nil
end

#on_var_ref(*args) ⇒ Object 



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# File 'lib/ripper-tags/parser.rb', line 157

def on_var_ref(*args)
  on_vcall(*args) || args
end

#on_vcall(name) ⇒ Object 



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# File 'lib/ripper-tags/parser.rb', line 161

def on_vcall(name)
  [name[0].to_sym] if name[0].to_s =~ /^(private|protected|public|private_class_method|public_class_method|module_function)$/
end

#on_xstring_add(first, arg) ⇒ Object 



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# File 'lib/ripper-tags/parser.rb', line 153

def on_xstring_add(first, arg)
  arg if first.nil?
end