Add syntax highlighting support for Powershell scripts

[lucypero]

Describe your feature request

Edit: The following tree-sitter grammar doesn't work:
Treesitter: https://github.com/powershell/tree-sitter-powershell

[AceofSpades5757]

I wasn't able to get it to work either. I'm not even sure why and I'm not sure if we'll ever know why.

[lucypero]

I wasn't able to get it to work either. I'm not even sure why and I'm not sure if we'll ever know why.

I am trying with a fork I made of the tree-sitter grammar. I think I'll make it work soon.

[AceofSpades5757]

I created an issue with them. Hopefully, they'll get it sorted as well.

PowerShell/tree-sitter-PowerShell#8

[the-mikedavis]

It looks like that grammar is a work-in-progress based on the TODOs in the README, and it has a generation failure on the latest tree-sitter-cli as you noted. That project most likely needs some contributions to be more complete, or a new attempt (that one looks a bit dated).

[AceofSpades5757]

It almost looks abandoned, although I'd be a bit surprised seeing as it should be the "official" one.

[lucypero]

So, I started adding highlight queries on my fork, then I realized that the parser parsed my powershell file all wrong. Someone probably should start to do the grammar from scratch. This one is just broken. I might do it one day.

[lucypero]

This Page describes the PowerShell grammar. This will be very helpful when making the tree-sitter grammar.

[Joe-Zer0]

This looks like an active LSP for PowerShell - https://github.com/PowerShell/vscode-powershell. But I'm unsure how to install it use it with Helix.

[daephx]

This looks like an active LSP for PowerShell - https://github.com/PowerShell/vscode-powershell. But I'm unsure how to install it use it with Helix.

I don't recall if it has semantic highlighting but I've used it in neovim. The repo states in the first few paragraphs of the README that the vscode extension is basically a wrapper for PowerShellEditorServices if that helps you search for helix specific references.

[Joe-Zer0]

Thanks. I've spent a few hours searching for "helix powershell". Unfortunately, this thread is about the only thing that comes up. Up till now all the LSP's I needed have been available through npm, cargo, pip. So getting this thing installed will be the first step.

[lrottach]

Hi @Joe-Zer0
I got the PowerShell Editor Services up and running in my Helix configuration on a MacBook Pro.
You find some more details in this discussion here: #3956

Unfortunately, this only implements auto-completion for PowerShell scripts, not syntax highlighting.
For syntax highlighting, someone would still have to develop the grammar. Unfortunately, I know too little about this.

[Joe-Zer0]

@lrottach - Thank you, that's exactly what I needed!
I also found this - https://github.com/PProvost/vim-ps1 - which looks like it could be helpful in configuring syntax highlighting. But I'm in too far over my head to do anything with it.

EDIT:
Here is another project that may help with syntax highlighting - https://github.com/PowerShell/EditorSyntax.

[LucasWagler]

The tree-sitter site now mentions this grammar from Airbus CERT.