PowerShell Intellisense dropdown in Microsoft Terminal

[Ayanmullick]

Description of the new feature/enhancement

Could an SQLCLI-like terminal intellisense dropdown be enabled for PowerShell in the new Microsoft Terminal thru PSReadline?

Proposed technical implementation details (optional)

Working on the terminal with PowerShell 7 could become more convenient if one was able to see all the potential matches for one's cmdlets and parameter values in a dropdown right in the terminal.

Creating issue as discussed during community call.
PowerShell/PowerShell-RFC#242 (comment)

[lzybkr]

See microsoft/terminal#3121

[Ayanmullick]

See microsoft/terminal#3121

@DHowett-MSFT , a member of the Microsoft Terminal product group, had explained that this needs to be enabled at the PowerShell level by the PowerShell team and not at the Terminal level.

[lzybkr]

@Ayanmullick - right - the shell must do something to invoke some UI.

The UI could be implemented 100% by the shell - PowerTab was popular for an experience close to what you're suggesting.

Alternatively, the terminal could provide a UI that the shell invokes which is what I understand something some terminals provide or are considering providing.

[Ayanmullick]

@lzybkr , Right and PowerTab errors out on VSC and on MSTerminal.

[Ayanmullick]

Even AzCLI has an interactive mode that works on the cloudshell too.

[lzybkr]

@Ayanmullick - have you tried MenuComplete? It is a different experience than the examples you've raised, but it is an interactive experience showing help and filtering.

The default key binding Ctrl+Spacebar doesn't work in Windows Terminal, but you can bind it to another key.

[Ayanmullick]

@lzybkr , I tried it. I prefer the more fluid experiences in the screenshot above to the Ctrl+Spacebar experience. However, since most of my work is with the Az modules the Az predictor somewhat fills that gap. I wish there was a predictor for the MSGraph modules too.

[StevenBucher98]

A lot of this is addressed with the latest preview of Windows Terminal, https://devblogs.microsoft.com/commandline/windows-terminal-preview-1-19-release/

[Ayanmullick]

Yes, the Suggestions UI and Shell Completion Menu look promising. That's what I was looking for. Does it work with Azure resources, too, like in the screen clip above, @StevenBucher98?

[StevenBucher98]

I do not believe so, I think it just uses tab completion for the suggestions and not sure if Az does tab completions for that.

cc @dcaro