JUJU_HOME never gets initialized ("no public ssh keys found")

fake-juju should always initialize $JUJU_HOME (by calling github.com/juju/juju/juju.InitJujuHome). Otherwise there's a chance that Juju will not work correctly and may even fail.

For instance, InitJujuHome will ensure that $JUJU_HOME has a juju-specific SSH key. If that doesn't happen (and you don't happen to have a generically-named key in $HOME/.ssh) then the environment config will fail to find any keys. In the case of bootstrap that results in a failure with a message of "no public ssh keys found".

InitJujuHome() should be called as the first thing done in handleCommand() (http://bazaar.launchpad.net/~landscape/fake-juju/trunk/view/head:/1.25.3/fake-juju.go#L61).