How to set up maven 3 local plugin repository

Question

I need to have a completely offline maven repository due to some limitations. According to http://cwiki.apache.org/confluence/display/MAVEN/PluginResolutionException , only

Answer 1

Since Maven 3.1-alpha-1, the command line option -llr/--legacy-local-repository or the system property -Dmaven.legacyLocalRepo=true should help

See here for a general answer on working offline with maven