在PowerShell中将cmd输出管道传输到变量

Question

I have the following in a PowerShell script:

cmd /c npm run build-release 
$succeeded = $LastExitCode

What I'd like to do is:

1. Pipe the output of the cmd to a variable so it doesn't write to the host
2. Only if $succeeded is eq $true , Write-Host the output variable from that the cmd

How can this be done?

Answer 1

Use Invoke-Expression :

$output = Invoke-Expression "cmd /c npm run build-release"
$succeeded = $LastExitCode

if($succeeded -eq 0) {
  write-output $output
}