Make `!` work with powershell (neovim)

Question

I want to use ! with powershell. I use neovim natively on windows.

I tried these settings

set shell=powershell.exe
set shellcmdflag=-NoProfile\ -NoLogo\ -NonInteractive\ -Command
set shellpipe=|
set shellredir=>

as suggested here https://robindouglas.uk/powershell/vim/2018/04/05/PowerShell-with-Vim.html

They don't work (having nvim -u NONE from cmd or neovim-qt). They simply return the same command I typed.

I tried using this and additionally, set set shellquote=\" I get on !ls:

+ ""ls""
+   ~~~~
Unexpected token 'ls""' in expression or statement.
    + CategoryInfo          : ParserError: (:) [], ParentContainsErrorRecordException
    + FullyQualifiedErrorId : UnexpectedToken

Answer 1

OK, I didn't notice it . There is actually in help shell-powershell

The settings are

        let &shell = has('win32') ? 'powershell' : 'pwsh'
        let &shellcmdflag = '-NoLogo -NoProfile -ExecutionPolicy RemoteSigned -Command [Console]::InputEncoding=[Console]::OutputEncoding=[System.Text.Encoding]::UTF8;'
        let &shellredir = '2>&1 | Out-File -Encoding UTF8 %s; exit $LastExitCode'
        let &shellpipe = '2>&1 | Out-File -Encoding UTF8 %s; exit $LastExitCode'
        set shellquote= shellxquote=

Answer 2

to add up to the above solution and since OP specifically asked about Neovim, you're most likely using an init.lua, so here's the Lua equivalent.

--[[
I'd personally get rid of the if statement altogether and just use 'pwsh',
since this makes it use Windows Powershell instead of Powershell Core
in the case you are using the latter. Since it's an equivalent I'll leave it
]]--
if vim.fn.has('win32') == 1 then
  vim.o.shell = 'powershell'
else
  vim.o.shell = 'pwsh'
end

vim.o.shellcmdflag = '-NoLogo -NoProfile -ExecutionPolicy RemoteSigned -Command [Console]::InputEncoding=[Console]::OutputEncoding=[System.Text.Encoding]::UTF8;'
vim.o.shellredir = '2>&1 | Out-File -Encoding UTF8 %s; exit $LastExitCode'
vim.o.shellpipe = '2>&1 | Out-File -Encoding UTF8 %s; exit $LastExitCode'
vim.o.shellquote = ''
vim.o.shellxquote = ''

Albeit personally, I prefer the :term command with a mapping instead to open a terminal in a split window, it's available in Vim 8.0+