From d22130922e7842226d38d59680e4bbb48a28a5f0 Mon Sep 17 00:00:00 2001
From: ryan <ryan@b2dd03c8-39d4-4d8f-98ff-823fe69b080e>
Date: Wed, 1 Jun 2011 03:45:05 +0000
Subject: Import rubygems 1.8.5 (released @ 137c80f)

git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@31885 b2dd03c8-39d4-4d8f-98ff-823fe69b080e
---
 lib/rubygems/deprecate.rb | 74 +++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 74 insertions(+)
 create mode 100644 lib/rubygems/deprecate.rb

(limited to 'lib/rubygems/deprecate.rb')

diff --git a/lib/rubygems/deprecate.rb b/lib/rubygems/deprecate.rb
new file mode 100644
index 0000000000..948538da96
--- /dev/null
+++ b/lib/rubygems/deprecate.rb
@@ -0,0 +1,74 @@
+######################################################################
+# This file is imported from the rubygems project.
+# DO NOT make modifications in this repo. They _will_ be reverted!
+# File a patch instead and assign it to Ryan Davis or Eric Hodel.
+######################################################################
+
+##
+# Provides a single method +deprecate+ to be used to declare when
+# something is going away.
+#
+#     class Legacy
+#       def self.klass_method
+#         # ...
+#       end
+#
+#       def instance_method
+#         # ...
+#       end
+#
+#       extend Deprecate
+#       deprecate :instance_method, "X.z", 2011, 4
+#
+#       class << self
+#         extend Deprecate
+#         deprecate :klass_method, :none, 2011, 4
+#       end
+#     end
+
+module Deprecate
+
+  def self.skip # :nodoc:
+    @skip ||= false
+  end
+
+  def self.skip= v # :nodoc:
+    @skip = v
+  end
+
+  ##
+  # Temporarily turn off warnings. Intended for tests only.
+
+  def skip_during
+    Deprecate.skip, original = true, Deprecate.skip
+    yield
+  ensure
+    Deprecate.skip = original
+  end
+
+  ##
+  # Simple deprecation method that deprecates +name+ by wrapping it up
+  # in a dummy method. It warns on each call to the dummy method
+  # telling the user of +repl+ (unless +repl+ is :none) and the
+  # year/month that it is planned to go away.
+
+  def deprecate name, repl, year, month
+    class_eval {
+      old = "_deprecated_#{name}"
+      alias_method old, name
+      define_method name do |*args, &block| # TODO: really works on 1.8.7?
+        klass = self.kind_of? Module
+        target = klass ? "#{self}." : "#{self.class}#"
+        msg = [ "NOTE: #{target}#{name} is deprecated",
+                repl == :none ? " with no replacement" : ", use #{repl}",
+                ". It will be removed on or after %4d-%02d-01." % [year, month],
+                "\n#{target}#{name} called from #{Gem.location_of_caller.join(":")}",
+              ]
+        warn "#{msg.join}." unless Deprecate.skip
+        send old, *args, &block
+      end
+    }
+  end
+
+  module_function :deprecate, :skip_during
+end
-- 
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