Remove enableTracing (and update docs accordingly)

[HazAT]

Currently, we offer multiple options to configure sampling for tracing:

• tracesSampleRate
• tracesSampler
• enableTracing

But when to use which, is sometimes not obvious to our users. What makes this worse is that implications of some of them differ across SDKs, for example when it comes to Trace Propagation. In Python for example, propagation of trace headers works without any tracing config options in place being set. In Go, you need to at least set enableTracing to true in order to achieve the same result.

Goal is:

• remove enableTracing in all SDKs
• make tracesSampleRate the default, also in config snippets
• explain how to get more out of sampling by using the tracesSampler function
• mark enableTracing in all SDK docs as deprecated (config option page)

Deprecation

SDKs

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1. Deprecate enableTracing option sentry-javascript#12883
   Feature: Tracing Meta: Good First Issue +2
   
2. Deprecate enableTracing option sentry-dart#2181
   Platform: Dart +1
3. Deprecate enableTracing option sentry-cocoa#4177
   Platform: Cocoa +1
4. PHP SDK Deprecate enable_tracing option sentry-php#1743
5. Laravel SDK Deprecate enable_tracing option sentry-php#1743
6. Symfony SDK Deprecate enable_tracing option sentry-php#1743
7. React Native SDK (via JS Deprecate enableTracing option sentry-javascript#12883)
8. Deprecate enableTracing option sentry-java#3566
   Platform: Android Platform: Java +2
   
9. Kotlin Multiplatform SDK
10. Native SDK
11. Android SDK (via Java SDK)
12. .NET SDK Removed SentryOptions.EnableTracing sentry-dotnet#3569
13. Unity SDK - Handled via .NET SDK. See above.
14. PowerShell SDK - Handled via the .NET SDK. See above.
15. Unreal SDK - Handled via Cocoa, Android and Native SDK. See above.
16. Python SDK Deprecate enable_tracing option sentry-python#3918
17. Electron SDK
18. Ruby SDK Deprecate enable_tracing in favor of traces_sample_rate sentry-ruby#2535
19. Rust SDK
20. Capacitor SDK (via JS)
21. Cordova SDK not on JS v8 yet and adoption very low
22. Sentry CLI
23. Mobile docs: ref(Mobile): Remove enableTracing mentions sentry-docs#12561

[krystofwoldrich]

RN will get this from JS.

• Deprecate enableTracing option sentry-javascript#12883

[stephanie-anderson]

@bruno-garcia could you have a look at GDX SDKs, if all the points mentioned above are done? Stumbled across https://docs.sentry.io/platforms/dotnet/configuration/options/#enable-tracing which still exists - could you check if others are done?

[stephanie-anderson]

Also @szokeasaurusrex - could you go over the goals mentioned above and make sure they are done: enable_tracing is still mentioned in our docs: https://docs.sentry.io/platforms/python/configuration/options/#enable-tracing

[stephanie-anderson]

@sl0thentr0py Please make sure enable_tracing is gone from our docs: https://docs.sentry.io/platforms/ruby/configuration/options/#tracing-options

[stephanie-anderson]

@bitsandfoxes Could you have a look at Unity pls? https://docs.sentry.io/platforms/unity/configuration/options/#enable-tracing

[timfish]

The Electron SDK uses all the same types and core clients as the JavaScript SDKs so once the next major version is released, this options will no longer exist.