cd to ghq's repository selected by fzf on PowerShell

cd-ghq.ps1

function Test-Command {
    param(
        [Parameter(Position=1)]
        $Name
    )
    
    $null -ne (Get-Command $Name -ErrorAction:"SilentlyContinue")
}

if ((Test-Command ghq) -and (Test-Command fzf)) {
    function g
    {
        $root = ghq root
        $dir = [System.IO.Path]::Combine($root, (ghq list | fzf))
        if ([System.IO.Directory]::Exists($dir)) {
            Set-Location $dir
        }
    }
}