[FEATURE] Support PowerShell for k3d shell

[qiushihe]

Right now running k3d shell from a PowerShell session results in this error:

ERROR: selected shell [.] is not supported

I would like to see k3d shell support PowerShell. That is, if I run k3d shell from a PowerShell session, a sub-shell PowerShell session should be created (much like running bash inside bash) with KUBECONFIG environment variable already set to the correct value and have the name of the k3s cluster prepended to the shell's prompt.

Right now as a workaround I run this command:

> PowerShell -NoExit -Command {function prompt {"($([regex]::Match($(k3d get-kubeconfig), '([^/]+)\/kubeconfig\.yaml$').captures.groups[1].value)) PS $($ExecutionContext.SessionState.Path.CurrentLocation)$('>' * ($nestedPromptLevel + 1)) "} [Environment]::SetEnvironmentVariable("KUBECONFIG", (k3d get-kubeconfig), "Process")}

... which does exactly what I wanted k3d shell in PowerShell to do. It would be nice if k3d shell can have that built in.

[andyz-dev]

Thanks for the suggestion. It sounds useful. PR welcome!

[iwilltry42]

@qiushihe Out of curiosity... which docker are you using? Docker Toolbox for Windows or a remote docker or ...?

[qiushihe]

@iwilltry42 I use Docker for Windows (i.e. with HyperV).

[iwilltry42]

We actually dropped k3d shell with k3d v3. If you think there's still a real need for it, please open a new feature request for v4 👍