从 powershell 脚本生成的程序中正常退出

假设我有以下脚本：

$originalPath=pwd
D:\code\ps1\misc\title.ps1 "dynamo db"

$CURPATH = "$PSScriptRoot\path.txt"
$DB_DIR= cat $CURPATH

cd $DB_DIR
java -D"java.library.path=./DynamoDBLocal_lib" -jar DynamoDBLocal.jar
cd $originalPath

这个脚本正确启动了java程序，但是，当我按CTRL+C时，最后一个cd命令未执行。

这是 powershell 设计的吗？或者我可以改变这个吗？

^{This answer applies up to at least PowerShell (Core) 7.3.5.}

When you use Ctrl-C to abort an external program, the current PowerShell script (runspace) is invariably terminated too.

While you cannot generally prevent your script from getting terminated,^[1] you can perform clean-up actions, namely in the finally block of a try / catch / finally statement:

$originalPath = $PWD

# ...

try {

  cd $DB_DIR
  java -D"java.library.path=./DynamoDBLocal_lib" -jar DynamoDBLocal.jar

} finally {

  # This block is *always* executed, but limitations apply
  # if Ctrl-C was pressed:
  #  * Execution invariably ends with this block.
  #  * You cannot output to the success output stream or error stream,
  #    neither explicitly nor implicitly: doing so quietly and instantly
  #    aborts processing.
  #  * However, the *other* output streams *can* be targeted, namely with
  #    the following cmdlets (but note that except for Write-Host and Write-Warning, 
  #    producing visible output is opt-in):
  #     Write-Host, Write-Warning, Write-Verbose, Write-Debug, Write-Information

  cd $originalPath

}

请注意有关内容的限制输出流您可以定位，如上面的代码注释中所述，这源于finally阻止在脚本终止过程的后期执行。

值得注意的是，尝试使用Write-Output或隐式成功流输出或Write-Error will 悄悄中止的执行finally那时，而Write-Host, Write-Verbose and Write-Warning仅举几个最重要的，可以安全使用。

^{[1] The only way to intercept Ctrl-C in order to prevent termination is via a custom keyboard-polling loop, after having set [Console]::TreatControlCAsInput = $false - see this answer for an example.}