Refreshing PowerShell Terminal

Refreshing PowerShell Terminal.ps1

# Test Command Existence
function Test-CommandExists {
    [CmdletBinding()]
    param
    (
        [Parameter(Mandatory = $true)] [ValidateNotNullOrEmpty()] $command
    )
    $exists = $null -ne (Get-Command $command -ErrorAction SilentlyContinue)
    return $exists
}

function reload {

    Write-Verbose "Refreshing PowerShell profile"

    & $PROFILE

    # ($NULL -eq $IsWindows) checks for Windows Sandbox enviroment
    if ($IsWindows -or ($NULL -eq $IsWindows)) {

        Write-Verbose "Refreshing the current Windows session environment variables."

        # Expected path of the choco.exe file.
        $chocoInstallPath = "$Env:ProgramData/chocolatey/choco.exe"
        if ((Test-Path -path $chocoInstallPath) -and (Test-CommandExists choco) -and (Test-CommandExists Update-SessionEnvironment)) {
            # Make `refreshenv` available right away, by defining the $env:ChocolateyInstall
            # variable and importing the Chocolatey profile module.
            $env:ChocolateyInstall = Convert-Path "$((Get-Command choco).Path)\..\.."   
            Import-Module "$env:ChocolateyInstall\helpers\chocolateyProfile.psm1"
            Update-SessionEnvironment # refreshenv is an alias
        }
        else {
            Write-Warning "Update-SessionEnvironment was not available. Enviroment variables not refreshed. You might have to restart the terminal session."
        }
    }
}