Add autodiscovery of extensions via rdoc/discover.rb in third-party gems

Author: drbrain

History.txt

@@ -1,16 +1,17 @@
 === ? / 200?-??-??
 
 * X Major Enhancements
+  * RDoc now automatically loads rdoc/discover.rb files from installed gems.
 
 * Y Minor Enhancements
-  * Added a space after the commas in ri class method lists (rubyforge
-    enhancement 22182).
+  * Added a space after the commas in ri class method lists.  RubyForge
+    enhancement #22182.
   * Converted to minitest.
 
 * Z Bug Fixes
   * Fix missing superclass in ri output.
   * Fix an rdoc crash when told to parse an empty file.
- 
+
 === 2.2.1 / 2008-09-24
 This version provides some minor fixes and enhancements to 2.2.0 intended
 to polish RDoc for Ruby 1.9.1.

Rakefile

@@ -11,6 +11,7 @@ Hoe.new "rdoc", RDoc::VERSION do |rdoc|
   rdoc.remote_rdoc_dir = ''
 
   rdoc.extra_dev_deps << ['minitest', '~> 1.3']
+  rdoc.spec_extras['required_rubygems_version'] = '>= 1.3'
 end
 
 # These tasks expect to have the following directory structure:

lib/rdoc/rdoc.rb

@@ -291,3 +291,15 @@ def document(argv)
   end
 end
 
+if Gem.respond_to? :find_files then
+  rdoc_extensions = Gem.find_files 'rdoc/discover'
+
+  rdoc_extensions.each do |extension|
+    begin
+      load extension
+    rescue => e
+      warn "error loading #{extension.inspect}: #{e.message} (#{e.class})"
+    end
+  end
+end
+