Powershell:如何正确捕获错误？ErrorAction -Stop与exit

Question

当我想在Powershell脚本遇到错误时停止它时，我应该如何停止该脚本？

-ErrorAction -Stop ..

try {
     foo.bar
catch{
    $ErrorMsg = "An error occured during foo.bar"
    Write-Error -Message $ErrorMsg -ErrorAction Stop
}

或

try {
     foo.bar
catch{
    $ErrorMsg = "An error occured during foo.bar"
    Write-Error -Message $ErrorMsg
    exit
}

最好的实践和推荐是什么？

Answer 1

您可以预先将$ErrorActionPreference设置为停止，然后在try{}中调用您的脚本。如果脚本遇到错误，它应该使用throw，该错误将终止脚本，使其冒泡到调用脚本。

就像这样

$oldErrorAction = $ErrorActionPreference
$ErrorActionPreference = 'Stop'
try {
     foo.bar
}
catch{
    # re-throw the exception
    throw
}
finally {
    # reset the ErrorActionPreference
    $ErrorActionPreference = $oldErrorAction
}