How can I make an external program not pause my PowerShell script?

Question

I use the below script to run two programs in parallel (line 3 and line 5; line 1 just makes the file open PowerShell, execute the commands and close it again). Unfortunately, the script pauses at line 3 and will not run the second program until I close the first one.

File start.cmd:

@PowerShell -ExecutionPolicy Bypass -Command Invoke-Expression $('$args=@(^&{$args} %*);'+[String]::Join(';',(Get-Content '%~f0') -notmatch '^^@PowerShell.*EOF$')) & goto :EOF
Set-Location -LiteralPath "D:\ngrok"
.\ngrok tcp --region=us --remote-addr=9.tcp.ngrok.io:22648 22
Set-Location -LiteralPath "C:\Users\apeal\OneDrive\Desktop\SSC"
Start-Process -FilePath "run.bat"

Here is a video of me running the code: https://youtu.be/1FBJTcBXWTM

As you can see, when I run the CMD file, the tcp portal connects, but only after I exit the console using (cmd + c), the portal closes and the server starts.

How can I run both programs with my script in parallel/asynchronous?

stackprotector · Accepted Answer · 2024-07-16 17:29:33Z

3

A direct invocation like .\ngrok tcp --region=us --remote-addr=9.tcp.ngrok.io:22648 22 will make your script wait until the process is finished. Start-Process in contrast, will not wait by default (you can let it wait with the -Wait switch though).

To pass arguments to the executable that you want to run with Start-Process, you can use the -ArgumentList parameter. So, just replace your direct invocation by:

Start-Process .\ngrok -ArgumentList "tcp --region=us --remote-addr=9.tcp.ngrok.io:22648 22"

and you are good to go.

answered Jul 16, 2024 at 17:29

stackprotector

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