Support custom script

[giggio]

It would be nice to have shoutrrr simply call a custom script and pass the arguments. We could extend then it as we needed.

[piksel]

Shoutrrr is a go library, so we have no idea what the running environment is like. It also feels like a potential security issue that the consumers of the library would need to handle.

[giggio]

Shoutrrr doesn't need to know the environment, the user is supposed to know what they want to call.

I'll explain my context. I'm using Shoutrrr with Watchtower, and I need to know when an update is available and take some custom actions. Because I can't do that, I can't use Watchtower. I'm moving to Diun, as they support custom scripts, see: https://crazymax.dev/diun/notif/script/

Regarding security, the script would have as much privilege as the process running Shoutrrr, if that is compromised, I'd say the risk is much greater than starting a process.

[piksel]

Watchtower is running inside a container with no additional binaries, so there is nothing to run your script in. No bash, no python, nothing. That's what I meant by "the environment".

Diun seems to be much more suitable for your usage though, as it's main usage scenario is watching for docker image updates.

[giggio]

I could volume mount what I need.