CFDEV fail to start on Windows with conflicting Powershell modules installed

[shouah]

Summary: When running CFDEV on Windows 10 which has powershell modules for both Hyper-V and VMware PowerCLI installed, which has duplicated commands like Get-VM, then then CF CLI plugin invokes the wrong command and fails unexpectedly.

Expected behavior: The command "cf dev start -f ...tgz" invokes the correct PowerShell commands under the hood

Observed behavior:

> cf dev start -f .\pcfdev-v1.2.0-windows.tgz
FAILED
cf dev start: is running: getting vms: failed to execute: powershell.exe -Command "Get-VM -Name cfdev*": exit status 1: Get-VM : 8/20/2019 10:33:14 AMGet-VM          You are not currently connected to any servers. Please connect first using a Connect cmdlet.
At line:1 char:1
+ Get-VM -Name cfdev*
+ ~~~~~~~~~~~~~~~~~~~
    + CategoryInfo          : ResourceUnavailable: (:) [Get-VM], ViServerConnectionException
    + FullyQualifiedErrorId : Core_BaseCmdlet_NotConnectedError,VMware.VimAutomation.ViCore.Cmdlets.Commands.GetVM

Request: Either:

1. Update the plugin to explicitly prefix all PowerShell commands with the Hyper-V prefix to ensure ambiguous execution, for example:

powershell.exe -Command "Hyper-V\Get-VM -Name cfdev*"

2. Or provide a start command line option to specify the PowerShell prefix to be used, something like:

cf dev start -f ...tgz -psprefix "Hyper-V"

[cf-gitbot]

We have created an issue in Pivotal Tracker to manage this:

https://www.pivotaltracker.com/story/show/168005551

The labels on this github issue will be updated when the story is started.

[aemengo]

Apologies for the lack of response on this issue, up until now. Your request is sound and is a use-case that we'd like to support. We opted for option 1.

1. Update the plugin to explicitly prefix all PowerShell commands with the Hyper-V prefix to ensure ambiguous execution

The code fix should be applied and present in our most recent CLI release: 0.0.17.

$ cf install-plugin -r CF-Community cfdev
...
$ cf dev version
CLI: 0.0.17
BUILD: 14 (b36c82e)

Many thanks for bringing this to our attention.