Add warning message for faulty dependencies case.

docs/src/man1/cdist.rst

@@ -246,6 +246,35 @@ connection. In this case ssh will disable multiplexing.
 This limit is controlled with sshd :strong:`MaxSessions` configuration
 options. For more details refer to :strong:`sshd_config`\ (5).
 
+When requirements for the same object are defined in different manifests (see
+example below) in init manifest and in some other type manifest and they differs
+then dependency resolver cannot detect dependencies right. This happends because
+cdist cannot prepare all objects first and then run objects because some
+object can depend on the result of type explorer(s) and explorers are executed
+during object run. cdist will detect such case and write warning message.
+Example for such a case:
+
+.. code-block:: sh
+
+    init manifest:
+        __a a
+        require="__e/e" __b b
+        require="__f/f" __c c
+        __e e
+        __f f
+        require="__c/c" __d d
+        __g g
+        __h h
+
+    type __g manifest:
+        require="__c/c __d/d" __a a
+
+    Warning message:
+        .WARNING: cdisttesthost: Object __a/a already exists with requirements:
+        /usr/home/darko/ungleich/cdist/cdist/test/config/fixtures/manifest/init-deps-resolver /tmp/tmp.cdist.test.ozagkg54/local/759547ff4356de6e3d9e08522b0d0807/data/conf/type/__g/manifest: set()
+        /tmp/tmp.cdist.test.ozagkg54/local/759547ff4356de6e3d9e08522b0d0807/data/conf/type/__g/manifest: {'__c/c', '__d/d'}
+        Dependency resolver could not handle dependencies as expected.
+
 COPYING
 -------
 Copyright \(C) 2011-2013 Nico Schottelius. Free use of this software is