powershell - 处理从PowerShell运行的NPM命令中的错误

Question

我有一个从PowerShell运行的NPM命令:

npm install process-migrator -g 
process-migrator 

如果未正确配置此命令，则该命令将返回错误，但是我无法在PowerShell中进行拾取。

[ERROR] [2018-09-25T15:30:30.610Z] Cannot find configuration file 'configuration.json'
[INFORMATION] [2018-09-25T15:30:30.615Z] Generated configuration file as 'configuration.json', please fill in required information and retry.

是否有某种方法可以得到该错误？

我努力了:

if($?) {            
   Write-Host "Process-Migrator completed sucessfully." $LASTEXITCODE           
} else {   
   Write-VstsTaskError "Process-Migrator FAILED " $LASTEXITCODE -ErrCode $LASTEXITCODE
} 
Process-Migrator completed sucessfully. 1

但是$？返回true，$ LASTEXITCODE为1。

Answer 1

您将需要首先捕获应用程序的输出:

$output = & 'process-migrator.exe' 2>&1
if ($LASTEXITCODE -ne 0)
{
    $err = $output.Where{$PSItem -match 'ERROR'}
    Write-VstsTaskError "Process-Migrator FAILED: $err" -ErrCode $LASTEXITCODE
}

注意:我对扩展进行了假设，以使执行更加精细