Add shell widget for PowerShell

[denisidoro]

[welcome[bot]]

Thanks for opening your first issue here! In case you're facing a bug, please update navi to the latest version first. Maybe the bug is already solved! :)

[Milo123459]

Right, I'm ready to start implementing this! What do I have to implement?

[denisidoro]

Cool! If you could port https://github.com/denisidoro/navi/blob/master/shell/navi.plugin.bash to PowerShell it would be awesome!

[Milo123459]

Will do :)

[God-damnit-all]

This + improved Windows support would be a dream, PowerShell 7 is exceedingly useful.

[God-damnit-all]

Right, I'm ready to start implementing this! What do I have to implement?

Is this still on your bucket list, or do you no longer have the time?

[lurebat]

@denisidoro

I don't have the time to make a full PR, but here is a powershell script adapted from the fish script:

function Invoke-NaviWidget {
    $ast = $tokens = $errors = $cursor = $null
    [Microsoft.PowerShell.PSConsoleReadLine]::GetBufferState([ref] $ast, [ref] $tokens, [ref] $errors, [ref] $cursor)

    $line = $ast.ToString().Trim()
    $output = $null

    if ([String]::IsNullOrEmpty($line)) {
        $output = navi --print
    }
    else {
        $best_match = (navi --print --best-match --query $line | Out-String).Trim()
        if ([String]::IsNullOrEmpty($best_match)) {
            $output = (navi --print --query "$line" | Out-String).Trim()
        } else {
            $output = $best_match
        }
    }

    [Microsoft.PowerShell.PSConsoleReadLine]::RevertLine()
    [Microsoft.PowerShell.PSConsoleReadLine]::Insert($output)
}

Set-PSReadlineKeyHandler -Key Ctrl+g -ScriptBlock { Invoke-NaviWidget }