Previously, all procs were assumed to just be the current version. This
is certainly not going to be true always so now the version number of
the configuration must be explicit if you're assigning a proc to the
configuration loader.
This means that the Config::Loader now only knows how to load
configuration for versions used to initialize the class. This lets
things like the tests be completely isolated from what the actual
configuration is for Vagrant. This will be immensely useful to verify
that the loader functionality works for non-trivial bits (like
upgrading) without depending on Vagrant's upgrading functionality.
Vagrant.configure is now how configuration is done in Vagrantfiles
(previously it was Vagrant::Config.run). This function takes a single
argument which is the version of configuration to use.
Various internals were updated for this new versioned configuration.
Note that multiple versions of configuration aren't yet used so aren't
fully supported by Vagrant, but the foundation is being set here.
I created VersionBase which is the abstract base class for any
configuration versions. Configuration versions are responsible for
knowing how to load configuration given a proc (from a
Vagrant.configure block), as well as merging configuration procs. In the
future, it will have to upgrade versions as well. This is not done yet.
The VERSIONS constant was added to Vagrant::Config which is a registry
to keep track of all the available configuration versions. The
VERSIONS_ORDER constant is an array of the ordering of these versions.
The ordering is important so that in the future Vagrant can attempt to
gracefully upgrade the configurations. It is also used to determine the
current configuration version (which is assumed to be the last version
in the order).
The loader was modified to use the current version and the VERSIONS
registry instead of hardcoding V1.
NFSv4 has siginificant added complexity in the form of ID-mapping which
can cause problems with applications without extra setup. Best to
force version 3 unless the user requests it.
Conflicts:
lib/vagrant/systems/linux.rb
To do this, I convert the ports to base 32 strings in the format
of "guestport-hostport." This makes a consistent mapping we can use
to look up if the forwarded port is set.
