* lib/optparse/ac.rb: autoconf-like options.

git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@35214 b2dd03c8-39d4-4d8f-98ff-823fe69b080e

1 files changed, 50 insertions, 0 deletions

diff --git a/lib/optparse/ac.rb b/lib/optparse/ac.rb
new file mode 100644
index 0000000000..6a8626094d
--- /dev/null
+++ b/lib/optparse/ac.rb
@@ -0,0 +1,50 @@
+require 'optparse'
+
+class OptionParser::AC < 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
+
+  def _ac_arg_enable(prefix, name, help_string, block)
+    _check_ac_args(name, block)
+
+    sdesc = []
+    ldesc = ["--#{prefix}-#{name}"]
+    desc = [help_string]
+    q = name.downcase
+    enable = Switch::NoArgument.new(nil, proc {true}, sdesc, ldesc, nil, desc, block)
+    disable = Switch::NoArgument.new(nil, proc {false}, sdesc, ldesc, nil, desc, 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