This commit fixes the original #11027 fix, which assumed that the
hyper-v provider just wasn't properly getting a VM id when it listed
snapshots. In reality, it was just that if you invoke the
`with_target_vm` method with no arguments, it runs on the entire environment.
This meant that the capability snapshot_list attempted to be invoked on
machines that didn't exist yet, which is the original cause for why the
list_snapshot method did not recieve a vm ID. This commit fixes that by
simply skipping the machine if it does not yet exist.
Prior to this commit, if you tried to save a snapshot without giving it
a name, the hyper-v driver would not properly obtain a vm id to save a
snapshot on, resulting in an error. This commit updates the command
snapshot save to hold onto the machines ID in argv rather than `pop` it
off, so that the hyperv driver can obtain the guests id when saving a
snapshot.
Prior to this commit, if a user attempted to use the `vagrant snapshot
save` or `vagrant snapshot list` commands on a vm whose provider did not
support snapshots, it would simply print a warning. This commit changes
that behavior by instead raising an error.
Prior to this commit, the vagrant snapshot plugin would save snapshots
with existing names which lead to duplicate snapshot names being saved.
This commit fixes that by checking to see if the given snapshot name
already exists and if so, fails telling the user the given snapshot name
already exists. If a user passes a --force flag, vagrant will first
delete the existing snapshot, and take a new one with the given name.
Brian Cain
Mitchell Hashimoto