Use spotlight without supplying a DSN

[ueman]

Problem Statement

I want to be able to use spotlight without having to add a DSN.

Solution Brainstorm

Don't throw when spotlight is enabled, but no DSN is configured.

I have no clue whether this is an intended use case, but it would be nice if it's possible.

Are you willing to submit a PR?

Yes

### 🛑 Blocked by
- [ ] https://github.com/getsentry/sentry-cocoa/issues/4620
- [ ] https://github.com/getsentry/sentry-java/issues/3981

[buenaflor]

Yeah sounds good, afaik other sdks do it as well

e.g getsentry/sentry-ruby#2226 and same feature request on .net getsentry/sentry-dotnet#3481

[ueman]

From the Dart SDK perspective it's pretty much just a change in the init assertion, would there be more needed on the native SDKs to make it possible?

[buenaflor]

would there be more needed on the native SDKs to make it possible?

probably the same, I don't think the native sdks currently allow using spotlight without dsn as well.

[buenaflor]

Blocked by #2282 <- I want this issue done first

[martinhaintz]

would there be more needed on the native SDKs to make it possible?

probably the same, I don't think the native sdks currently allow using spotlight without dsn as well.

@buenaflor
It looks like the Android SDK needs a dsn: sentry.java

    if (!options.isEnabled() || (dsn != null && dsn.isEmpty())) {
      close();
      return false;
    } else if (dsn == null) {
      throw new IllegalArgumentException(
          "DSN is required. Use empty string or set enabled to false in SentryOptions to disable SDK.");
    }

[kahest]

@buenaflor I think this is unblocked as #2282 has been fixed with #2285