Update documentation to explain rationale

cdist/conf/type/__nop/man.rst

@@ -3,43 +3,49 @@ cdist-type__nop(7)
 
 NAME
 ----
-cdist-type__nop - Do nothing.
+cdist-type__nop - Do nothing, but allow dependencies to be specified.
 
 
 DESCRIPTION
 -----------
-This type will literally do nothing; it's sole purpose is to provide an 'anchor point' in case one would have an empty manifest, but still needs to specify some dependencies.
+If one has a type without any logic in the ``manifest`` (i.e. only some ``gencode-*`` logic), that depends on some other type, there are two ways make sure the dependencies taken into consideration:
 
-The only thing that one needs to specify is some kind of object name, which will be simply ignored.
+- Either remember to specify them "externally" *every time*, wherever and whenever those types are used
+- Include a ``manifest`` in the *dependent* type, that does something useless (or even nothing)
 
-It is advisible, though, to provide a name based on the parent object's id, so to make this call unique.
+This type provides a convenient solution for the latter one. It is guaranteed to have no effect on the target host, but it provides an 'anchor point' for type-writers to include in an otherwise empty ``manifest``.
 
-REQUIRED PARAMETERS
--------------------
+PARAMETERS
+----------
 None.
 
-
-OPTIONAL PARAMETERS
--------------------
-None.
-
-
-BOOLEAN PARAMETERS
-------------------
-None.
+The ``$__object_id`` is required though, so the type can be used several times.
 
 
 EXAMPLES
 --------
 
+Let's assume type ``__eggs`` depends on type ``__spam``, but has nothing in it's ``manifest``. In the simplest case, it's manifest can contain this:
+
 .. code-block:: sh
+    __spam
 
-    require="__othertype/foo" __nop $__object_id # Use parent object's id to make the name unique
+If, ``__spam`` has parameters, however, one would resort to this at the place of use:
 
+.. code-block:: sh
+    __spam --foo bar
+    require="__spam" __ham --baz
 
-SEE ALSO
---------
-*Nothing to see here...*
+Or by using the ``__nop`` type, simply do away with the ``require``, and update ``__ham/manifest`` to specify the dependency:
+
+.. code-block:: sh
+    require="__spam" __nop $__object_id
+
+In this case, when the type is used, the depencency is automatic, and one could simply write:
+
+.. code-block:: sh
+    __spam --foo bar
+    __ham --baz
 
 AUTHORS
 -------