updated to rake code to rake-0.8.3 source code base

git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@19542 b2dd03c8-39d4-4d8f-98ff-823fe69b080e

lib/rake/win32.rb

@@ -0,0 +1,54 @@
+module Rake
+  
+  # Win 32 interface methods for Rake. Windows specific functionality
+  # will be placed here to collect that knowledge in one spot.
+  module Win32
+    
+    # Error indicating a problem in locating the home directory on a
+    # Win32 system.
+    class Win32HomeError < RuntimeError
+    end
+    
+    class << self
+      # True if running on a windows system.
+      def windows?
+        Config::CONFIG['host_os'] =~ /mswin/
+      end
+
+      # Run a command line on windows.
+      def rake_system(*cmd)
+        if cmd.size == 1
+          system("call #{cmd}")
+        else
+          system(*cmd)
+        end
+      end
+      
+      # The standard directory containing system wide rake files on
+      # Win 32 systems. Try the following environment variables (in
+      # order):
+      #
+      # * APPDATA
+      # * HOMEDRIVE + HOMEPATH
+      # * USERPROFILE
+      #
+      # If the above are not defined, the return nil.
+      def win32_system_dir #:nodoc:
+        win32_shared_path = ENV['APPDATA']
+        if win32_shared_path.nil? && ENV['HOMEDRIVE'] && ENV['HOMEPATH']
+          win32_shared_path = ENV['HOMEDRIVE'] + ENV['HOMEPATH']
+        end
+        win32_shared_path ||= ENV['USERPROFILE']
+        raise Win32HomeError, "Unable to determine home path environment variable." if
+          win32_shared_path.nil? or win32_shared_path.empty?
+        normalize(File.join(win32_shared_path, 'Rake'))
+      end
+      
+      # Normalize a win32 path so that the slashes are all forward slashes.
+      def normalize(path)
+        path.gsub(/\\/, '/')
+      end
+      
+    end
+  end
+end