Append to windows path

path-add.ps1

param(
    [Parameter(Mandatory=$True, Position=0, ValueFromPipeline=$False)]
    [System.String]
    $PATH_ADD
)

$TARGET = $ExecutionContext.SessionState.Path.GetUnresolvedProviderPathFromPSPath($PATH_ADD)

$PATH = (Get-ItemProperty -Path ‘Registry::HKEY_LOCAL_MACHINE\System\CurrentControlSet\Control\Session Manager\Environment’ -Name PATH).path
$PATH_DIR = $PATH.split(";");

if ($PATH_DIR -contains $TARGET) {
    WRITE-HOST "$TARGET is already in the system path | path-add $PATH_ADD"
    
    EXIT 1   
}

WRITE-HOST "PATH += $TARGET"

$PATH_NEW = “$PATH;$PATH_ADD”

Set-ItemProperty -Path ‘Registry::HKEY_LOCAL_MACHINE\System\CurrentControlSet\Control\Session Manager\Environment’ -Name PATH -Value $PATH_NEW

WRITE-HOST "PATH FOR USER UPDATED"

$env:PATH = $PATH_NEW

WRITE-HOST "PATH FOR POWERSHELL UPDATED"