tree bc86b029757ca13c723bf13c7a8dccfb3361dc50
parent e7080f3fe42b4816e7908e077387933487851ba2
author Cosmos Nicolaou <cnicolaou@google.com> 1413852005 -0700
committer Cosmos Nicolaou <cnicolaou@google.com> 1413852007 -0700

veyron/lib/{modules,exec}: tidy up env var handling.

Tidy up the handling of environment variables in particular to
make working with and implementing the node manager and associated
tests easier.

The exec package now unsets the VEYRON_EXEC_VERSION env var when
it no longer needs to avoid having it be accidentally passed on
to other process that are are not necessarily started by this
package.

The modules shell type now has a 'CommandEnvelope' method that can
be used by the node manager when constructing envelopes for use
with the app manager.

Change-Id: I86a896557bdf6b87f39523fb7399453cf7d2a0fe