Only report extension load errors on start

[unflxw]

Before this change, extension load errors would be reported whenever @appsignal/nodejs or the client.ts file was imported. Now they will only be reported whenever Client fails to initialise.

This fixes an issue where the extension load errors would be reported when running npm install in the appsignal-nodejs folder.

Rearrange the way that the client is initialised. Remove the client.start() method, as starting is done automatically during initialisation. Use early returns to clearly distinguish the client initialisation failure scenarios. Emit distinct error messages for different configuration-related failures.

Change the Client.isActive method to reflect whether the client was actually initialised, rather than whether several factors in the configuration should mean that the client was initialised.

[tombruijn]

I'm okay with this change but you need to update the tests for this.

[unflxw]

@tombruijn Yeah, the tests are correct to be failing -- now the message is not emitted at all. I'll see what I can do to fix it.

[backlog-helper[bot]]

:heavy_check_mark: All good!

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[unflxw]

@tombruijn It's been fixed now -- but I've also changed a lot of other stuff in the process. I couldn't understand what the right place to emit these warnings in the client initialisation was, so I ended up rearranging it significantly to figure it out.

[backlog-helper[bot]]

• This Pull Request needs more reviews. @jeffkreeftmeijer @tombruijn @luismiramirez - (More info)

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[tombruijn]

Worth it to add a changeset .