Added optional per-module lib directory.

Puppet now looks for a lib directory inside each module bundle, and adds
the directory to the list searched by Puppet::Util::Autoload.

The intent is to facilitate more sophisticated virtual types and flexibility
within modules.

examples/code/modules/sample-module.pp

@@ -0,0 +1,10 @@
+# Jeff McCune <jeff.mccune@northstarlabs.net>
+# 2007-08-14
+#
+# Use:
+# puppet --verbose --debug --modulepath=`pwd` ./sample-module.pp
+#
+# sample-module demonstrates the use of a custom language function
+# included within the module bundle.
+
+include sample-module

examples/code/modules/sample-module/README.txt

@@ -0,0 +1,17 @@
+Jeff McCune <jeff.mccune@northstarlabs.net>
+2007-08-14
+
+This small, sample module demonstrates how to extend the puppet language
+with a new parser function.
+
+See:
+manifests/init.pp
+lib/puppet/parser/functions/hostname_to_dn.rb
+templates/sample.erb
+
+Note the consistent naming of files for Puppet::Util::Autoload
+
+Reference Documents:
+http://reductivelabs.com/trac/puppet/wiki/ModuleOrganisation
+http://reductivelabs.com/trac/puppet/wiki/WritingYourOwnFunctions
+http://reductivelabs.com/trac/puppet/wiki/FunctionReference

examples/code/modules/sample-module/lib/puppet/parser/functions/hostname_to_dn.rb

@@ -0,0 +1,36 @@
+# Copyright (C) David Schmitt <david@schmitt.edv-bus.at>
+# All rights reserved.
+# 
+# Redistribution and use in source and binary forms, with or without
+# modification, are permitted provided that the following conditions
+# are met:
+# 1. Redistributions of source code must retain the above copyright
+#    notice, this list of conditions and the following disclaimer.
+# 2. Redistributions in binary form must reproduce the above copyright
+#    notice, this list of conditions and the following disclaimer in the
+#    documentation and/or other materials provided with the distribution.
+# 3. Neither the name of the Author nor the names of its contributors
+#    may be used to endorse or promote products derived from this software
+#    without specific prior written permission.
+# 
+# THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
+# ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+# IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+# ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
+# FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+# DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
+# OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
+# HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
+# LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
+# OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
+# SUCH DAMAGE.
+
+# Jeff McCune <jeff.mccune@northstarlabs.net>
+# 2007-08-14
+# See: http://reductivelabs.com/trac/puppet/wiki/WritingYourOwnFunctions
+
+module Puppet::Parser::Functions
+	newfunction(:hostname_to_dn, :type => :rvalue, :doc => "Given 'foo.bar.com', return 'dc=foo,dc=bar,dc=com'.") do |args|
+		args[0].split(/\./).map do |s| "dc=%s"%[s] end.join(",")
+	end
+end

examples/code/modules/sample-module/manifests/init.pp

@@ -0,0 +1,12 @@
+# Jeff McCune <jeff.mccune@northstarlabs.net>
+# 
+# Demonstration of a custom parser function and erb template within
+# a module, working in concert.
+
+class sample-module {
+  $fqdn_to_dn = hostname_to_dn($domain)
+  $sample_template = template("sample-module/sample.erb")
+  
+  notice("hostname_to_dn module function returned: [$fqdn_to_dn]")
+  info("sample.erb looks like:\n$sample_template")
+}

examples/code/modules/sample-module/templates/sample.erb

@@ -0,0 +1,5 @@
+
+## Jeff McCune <jeff.mccune@northstarlabs.net>
+fqdn:   <%= fqdn %>
+basedn: <%= fqdn_to_dn %>
+## end sample.erb ##

lib/puppet/util/autoload.rb

@@ -141,7 +141,13 @@ class Puppet::Util::Autoload
 
     # The list of directories to search through for loadable plugins.
     def searchpath
-        [Puppet[:libdir], $:].flatten
+        # JJM: Search for optional lib directories in each module bundle.
+        module_lib_dirs = Puppet[:modulepath].split(":").collect do |d|
+            Dir.glob("%s/*/lib" % d).select do |f|
+                FileTest.directory?(f) 
+            end
+        end.flatten
+        [module_lib_dirs, Puppet[:libdir], $:].flatten
     end
 end