1 files changed, 41 insertions, 0 deletions
diff --git a/prelude.rb b/prelude.rb
new file mode 100644
index 0000000000..b6c610dd58
--- /dev/null
+++ b/prelude.rb
@@ -0,0 +1,41 @@
+class Binding
+  # :nodoc:
+  def irb(...)
+    suppress = Thread.current[:__bundled_gems_warning_suppression]
+    Thread.current[:__bundled_gems_warning_suppression] = ['reline', 'rdoc']
+
+    begin
+      require 'irb'
+    rescue LoadError, Gem::LoadError
+      Gem::BUNDLED_GEMS.force_activate 'irb'
+      require 'irb'
+    end
+    irb(...)
+  ensure
+    Thread.current[:__bundled_gems_warning_suppression] = suppress
+  end
+
+  # suppress redefinition warning
+  alias irb irb # :nodoc:
+end
+
+module Kernel
+  # :stopdoc:
+  def pp(*objs)
+    require 'pp'
+    pp(*objs)
+  end
+
+  # suppress redefinition warning
+  alias pp pp
+
+  private :pp
+  # :startdoc:
+end
+
+module Enumerable
+  # Makes a set from the enumerable object with given arguments.
+  def to_set(&block)
+    Set.new(self, &block)
+  end
+end