Adding new assembly descritor to assemble a repository containing the dependencies for maven (pre-shaded), and adding a profile to the POM to allow us to trigger the creation of this new assembly. This is valuable for plugins and other components that list one or more maven artifacts as dependencies, so they can be built without rebuilding all of maven.
maven/components/trunk/maven-embedder/pom.xml
maven/components/trunk/maven-embedder/src/main/assembly/repo.xml