Make __manifest usable in type manifests

Signed-off-by: Nico Schottelius <nico@brief.schottelius.org>

doc/changelog

@@ -10,6 +10,7 @@ Changelog
 	* Bugfix __package_yum: Missing cat
 	* Bugfix __start_on_boot: Correctly use sed and quotes (Steven Armstrong)
 	* Feature __file: Support for --state exists (Steven Armstrong)
+	* Feature core: Make variable __manifest available to type manifests
 
 2.0.9: 2012-03-12
 	* Cleanup documentation: Fix environment variable list to be properly 

doc/man/cdist-reference.text.sh

@@ -173,7 +173,7 @@ __explorer::
     Available for: explorer, type explorer
 __manifest::
     Directory that contains the initial manifest.
-    Available for: initial manifest
+    Available for: initial manifest, type manifest
 __global::
     Directory that contains generic output like explorer.
     Available for: initial manifest, type manifest, type gencode

lib/cdist/core/manifest.py

@@ -92,6 +92,7 @@ class Manifest(object):
             env = os.environ.copy()
             env.update(self.env)
             env.update({
+                '__manifest': self.local.manifest_path,
                 '__object': cdist_object.absolute_path,
                 '__object_id': cdist_object.object_id,
                 '__object_name': cdist_object.name,