Initial load of support for ri/rdoc integration

git-svn-id: http://svn.ruby-lang.org/repos/ruby/trunk@5199 b2dd03c8-39d4-4d8f-98ff-823fe69b080e

1 files changed, 41 insertions, 0 deletions

diff --git a/lib/rdoc/ri/ri_paths.rb b/lib/rdoc/ri/ri_paths.rb
new file mode 100644
index 000000000..14288d9a9
--- /dev/null
+++ b/lib/rdoc/ri/ri_paths.rb
@@ -0,0 +1,41 @@
+module RI
+
+  # Encapsulate all the strangeness to do with finding out
+  # where to find RDoc files
+  #
+  # We basically deal with three directories:
+  #
+  # 1. The 'system' documentation directory, which holds
+  #    the documentation distributed with Ruby, and which
+  #    is managed by the Ruby install process
+  # 2. The 'site' directory, which contains site-wide
+  #    documentation added locally.
+  # 3. The 'user' documentation directory, stored under the
+  #    user's own home directory.
+  #
+  # There's contention about all this, but for now:
+  #
+  # system:: $prefix/lib/ruby/<version>/doc/rdoc
+  # site::   $prefix/lib/ruby/site_dir/<version>/doc/rdoc
+  # user::   ~/.rdoc
+
+  module Paths
+
+    #:stopdoc:
+    require 'rbconfig'
+    
+    DOC_DIR  = "doc/rdoc"
+
+    SYSDIR   = File.join(Config::CONFIG['rubylibdir'], DOC_DIR)
+    SITEDIR  = File.join(Config::CONFIG['sitelibdir'], DOC_DIR)
+    homedir = ENV['HOME'] || ENV['USERPROFILE'] || ENV['HOMEPATH']
+
+    if homedir
+      HOMEDIR = File.join(homedir, ".rdoc")
+    else
+      HOMEDIR = nil
+    end
+
+    PATH = [ SYSDIR, SITEDIR, HOMEDIR ].find_all {|p| p && File.directory?(p)}
+  end
+end