[ruby/optparse] Add `raise_unknown` flag

(https://github.com/ruby/optparse/pull/38)

https://github.com/ruby/optparse/commit/12529653cd

1 files changed, 7 insertions, 0 deletions

diff --git a/lib/optparse.rb b/lib/optparse.rb
index 7ddde82342..7cc7d10982 100644
--- a/lib/optparse.rb
+++ b/lib/optparse.rb
@@ -1148,6 +1148,7 @@ XXX
     @summary_indent = indent
     @default_argv = ARGV
     @require_exact = false
+    @raise_unknown = true
     add_officious
     yield self if block_given?
   end
@@ -1225,6 +1226,9 @@ XXX
   # abbreviated long option as short option).
   attr_accessor :require_exact
 
+  # Whether to raise at unknown option.
+  attr_accessor :raise_unknown
+
   #
   # Heading banner preceding summary.
   #
@@ -1639,9 +1643,11 @@ XXX
           begin
             sw, = complete(:long, opt, true)
             if require_exact && !sw.long.include?(arg)
+              throw :terminate, arg unless raise_unknown
               raise InvalidOption, arg
             end
           rescue ParseError
+            throw :terminate, arg unless raise_unknown
             raise $!.set_option(arg, true)
           end
           begin
@@ -1673,6 +1679,7 @@ XXX
               end
             end
           rescue ParseError
+            throw :terminate, arg unless raise_unknown
             raise $!.set_option(arg, true)
           end
           begin