+ Added Specification.all=. If you use this, we will light you on fire.

+ Added Gem.pre_reset_hook/s and post_reset_hook/s.

lib/rubygems.rb

@@ -189,6 +189,8 @@ class LoadError < ::LoadError
   @post_uninstall_hooks ||= []
   @pre_uninstall_hooks  ||= []
   @pre_install_hooks    ||= []
+  @pre_reset_hooks      ||= []
+  @post_reset_hooks     ||= []
 
   ##
   # Try to activate a gem containing +path+. Returns true if
@@ -719,6 +721,14 @@ def self.post_install(&hook)
     @post_install_hooks << hook
   end
 
+  ##
+  # Adds a hook that will get run after Gem::Specification.reset is
+  # run.
+
+  def self.post_reset(&hook)
+    @post_reset_hooks << hook
+  end
+
   ##
   # Adds a post-uninstall hook that will be passed a Gem::Uninstaller instance
   # and the spec that was uninstalled when Gem::Uninstaller#uninstall is
@@ -737,6 +747,14 @@ def self.pre_install(&hook)
     @pre_install_hooks << hook
   end
 
+  ##
+  # Adds a hook that will get run before Gem::Specification.reset is
+  # run.
+
+  def self.pre_reset(&hook)
+    @pre_reset_hooks << hook
+  end
+
   ##
   # Adds a pre-uninstall hook that will be passed an Gem::Uninstaller instance
   # and the spec that will be uninstalled when Gem::Uninstaller#uninstall is
@@ -1077,6 +1095,11 @@ class << self
 
     attr_reader :post_install_hooks
 
+    ##
+    # The list of hooks to be run after Gem::Specification.reset is run.
+
+    attr_reader :post_reset_hooks
+
     ##
     # The list of hooks to be run before Gem::Uninstall#uninstall does any
     # work
@@ -1088,11 +1111,15 @@ class << self
 
     attr_reader :pre_install_hooks
 
+    ##
+    # The list of hooks to be run before Gem::Specification.reset is run.
+
+    attr_reader :pre_reset_hooks
+
     ##
     # The list of hooks to be run after Gem::Uninstall#uninstall is finished
 
     attr_reader :pre_uninstall_hooks
-
   end
 
   def self.cache # :nodoc:

lib/rubygems/specification.rb

@@ -1641,7 +1641,9 @@ def self.reset
     # from = caller.first(10).reject { |s| s =~ /minitest/ }
     # warn ""
     # warn "NOTE: Specification.reset from #{from.inspect}"
+    Gem.pre_reset_hooks.each  { |hook| hook.call }
     @@all = nil
+    Gem.post_reset_hooks.each { |hook| hook.call }
   end
 
   extend Enumerable
@@ -1667,6 +1669,21 @@ def self.dirs
     }
   end
 
+  ##
+  # Sets the known specs to +specs+. Not guaranteed to work for you in
+  # the future. Use at your own risk. Caveat emptor. Doomy doom doom.
+  # Etc etc.
+
+  def self.all= specs
+    @@all = specs
+  end
+
+  def self.all
+    warn "NOTE: Specification.all called from #{caller.first}" unless
+      Deprecate.skip
+    _all
+  end
+
   def self._all
     unless defined?(@@all) && @@all then
       @@all = self.dirs.reverse.map { |dir|
@@ -1687,11 +1704,6 @@ def self._resort!
     }
   end
 
-  def self.all
-    warn "NOTE: Specification.all called from #{caller.first}" unless Deprecate.skip
-    _all
-  end
-
   def self.find_by_path path
     self.find { |spec|
       spec.contains_requirable_file? path