I read the rice 2.1.2 release message and followed the link to the Installation Guide .
In Section 5, "New Project Setup", "Maven CLI" there are two tables under point #1. The -DarchetypeVersion=2.2.0-M4-SNAPSHOT is wrong.
I think it should be per rice version. i.e. on the 2.1.2 version of the rice docs it should be -DarchetypeVersion=2.1.2 not 2.2.0-M4-SNAPSHOT
At this point in time the latest rice version is 2.2.0-RC1-SNAPSHOT so when I ran the documentation as described I recieved an error about the org.kuali.rice:rice-archetype-quickstart:2.2.0-M4-SNAPSHOT not existing.
I looked at the latest documentation, the rice 2.1.2 documentation and the rice 2.2.0-M4 documentation and all the installation guides had the same content related to the version of the archetype.