Currently, providers must match a box format exactly the same
as that provider's name. i.e. the virtuabox provider needs a
"virtualbox" box and the "vmware_fusion" provider needs a
"vmware_fusion" box. Now, the provider can specify what the box format
is they want and support multiple if wanted.
Other box formats are specified in the provider definition within
a plugin:
class Plugin < Vagrant.plugin("2", "provider")
# ... other stuff
provider("foo", box_format: ["virtualbox", "other_format"]) do
# .. same
end
end
Now when using the example "foo" provider above, boxes for both
"virtualbox" or "other_format" are searched for. If both are found,
the order in which the formats exist determines precedence.
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