Electron executing powershell script

Question

I want to execute a powershell script on the start of the electron App. I tried to add the following into the <head> in my index.html :

<head>
<script type="text/javascript">
    var spawn = require("child_process").spawn;
    spawn("powershell.exe",[".\myPSScript.ps1"]);       
</script>
</head>
<body>
...
</body>

This did not work. When adding:

document.write("Hello")

it shows up in the app so I can be sure that the <script>is being run. When I run the script itself from powershell-terminal it runs with no issues and does what it should.

I also tried giving the absolute path in:

spawn("powershell.exe",["C:\folder\folder2\myPSScript.ps1"]);

The script deletes all .db files in a folder on the machine.

Get-ChildItem -Path 'MY_Wonderfull_Path' *.db | Where-Object { $_.CreationTime -lt (get-date 2021-09-09) } | foreach { Remove-Item -Path $_.FullName }

I have no idea why it is not running. Is electron not able to spawn a new child process? Is it an issue with permissions?

I believe you need to double all backslashes in the absolute path: spawn("powershell.exe",["C:\\folder\\folder2\\myPSScript.ps1"]); — Theo
– Theo, Commented Sep 10, 2021 at 12:02
THis is right. Please make it an answer so I can approve it :) — Simon
– Simon, Commented Sep 10, 2021 at 12:17
You're right, I have now posted as answer so the question can be marked 'done'. — Theo
– Theo, Commented Sep 10, 2021 at 12:50

Theo · Accepted Answer · 2021-09-10 12:49:05Z

4

As requested, here my comment as answer.

You need to double the backslashes in the path to escape them.

spawn("powershell.exe",["C:\\folder\\folder2\\myPSScript.ps1"]);

answered Sep 10, 2021 at 12:49

Theo

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