1 files changed, 54 insertions, 0 deletions
diff --git a/lib/rubygems/vendor/optparse/lib/optparse/ac.rb b/lib/rubygems/vendor/optparse/lib/optparse/ac.rb
new file mode 100644
index 0000000000..e84d01bf91
--- /dev/null
+++ b/lib/rubygems/vendor/optparse/lib/optparse/ac.rb
@@ -0,0 +1,54 @@
+# frozen_string_literal: false
+require_relative '../optparse'
+
+class Gem::OptionParser::AC < Gem::OptionParser
+  private
+
+  def _check_ac_args(name, block)
+    unless /\A\w[-\w]*\z/ =~ name
+      raise ArgumentError, name
+    end
+    unless block
+      raise ArgumentError, "no block given", ParseError.filter_backtrace(caller)
+    end
+  end
+
+  ARG_CONV = proc {|val| val.nil? ? true : val}
+
+  def _ac_arg_enable(prefix, name, help_string, block)
+    _check_ac_args(name, block)
+
+    sdesc = []
+    ldesc = ["--#{prefix}-#{name}"]
+    desc = [help_string]
+    q = name.downcase
+    ac_block = proc {|val| block.call(ARG_CONV.call(val))}
+    enable = Switch::PlacedArgument.new(nil, ARG_CONV, sdesc, ldesc, nil, desc, ac_block)
+    disable = Switch::NoArgument.new(nil, proc {false}, sdesc, ldesc, nil, desc, ac_block)
+    top.append(enable, [], ["enable-" + q], disable, ['disable-' + q])
+    enable
+  end
+
+  public
+
+  def ac_arg_enable(name, help_string, &block)
+    _ac_arg_enable("enable", name, help_string, block)
+  end
+
+  def ac_arg_disable(name, help_string, &block)
+    _ac_arg_enable("disable", name, help_string, block)
+  end
+
+  def ac_arg_with(name, help_string, &block)
+    _check_ac_args(name, block)
+
+    sdesc = []
+    ldesc = ["--with-#{name}"]
+    desc = [help_string]
+    q = name.downcase
+    with = Switch::PlacedArgument.new(*search(:atype, String), sdesc, ldesc, nil, desc, block)
+    without = Switch::NoArgument.new(nil, proc {}, sdesc, ldesc, nil, desc, block)
+    top.append(with, [], ["with-" + q], without, ['without-' + q])
+    with
+  end
+end