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-rw-r--r--lib/optparse/kwargs.rb17
1 files changed, 17 insertions, 0 deletions
diff --git a/lib/optparse/kwargs.rb b/lib/optparse/kwargs.rb
new file mode 100644
index 00000000000..ed58cc142b6
--- /dev/null
+++ b/lib/optparse/kwargs.rb
@@ -0,0 +1,17 @@
+# frozen_string_literal: true
+require 'optparse'
+
+class OptionParser
+ def define_by_keywords(options, meth, **opts)
+ meth.parameters.each do |type, name|
+ case type
+ when :key, :keyreq
+ op, cl = *(type == :key ? %w"[ ]" : ["", ""])
+ define("--#{name}=#{op}#{name.upcase}#{cl}", *opts[name]) do |o|
+ options[name] = o
+ end
+ end
+ end
+ options
+ end
+end