* lib/irb/extend-command.rb: add irb_help command. [ruby-talk:91610]

* lib/irb/cmd/help.rb (IRB::ExtendCommand::Help): show RDoc.


git-svn-id: http://svn.ruby-lang.org/repos/ruby/trunk@5626 b2dd03c8-39d4-4d8f-98ff-823fe69b080e

2 files changed, 26 insertions, 0 deletions

diff --git a/lib/irb/cmd/help.rb b/lib/irb/cmd/help.rb
new file mode 100644
index 000000000..73067f53c
--- /dev/null
+++ b/lib/irb/cmd/help.rb
@@ -0,0 +1,23 @@
+require 'rdoc/ri/ri_driver'
+
+module IRB
+  module ExtendCommand
+    module Help
+      begin
+        @ri = RiDriver.new
+      rescue SystemExit
+      else
+        def self.execute(context, *names)
+          names.each do |name|
+            begin
+              @ri.get_info_for(name.to_s)
+            rescue RiError
+              puts $!.message
+            end
+          end
+          nil
+        end
+      end
+    end
+  end
+end
diff --git a/lib/irb/extend-command.rb b/lib/irb/extend-command.rb
index cfb2c7c4b..491aa027c 100644
--- a/lib/irb/extend-command.rb
+++ b/lib/irb/extend-command.rb
@@ -100,6 +100,9 @@ module IRB
 	[:fg, NO_OVERRIDE]],
       [:irb_kill, :Kill, "irb/cmd/subirb", 
 	[:kill, OVERRIDE_PRIVATE_ONLY]],
+
+      [:irb_help, :Help, "irb/cmd/help",
+        [:help, NO_OVERRIDE]],
     ]
 
     def EXCB.install_extend_commands