Document exclusion of Tink

[tomwmth]

General Troubleshooting

• I have checked for similar issues on the Issue-tracker.
• I have updated to the latest JDA version
• I have checked the branches or the maintainers' PRs for upcoming features.

Feature Request

I use JDA in a few production applications and had been wondering why the shaded JARs for those applications had gotten so much bigger since upgrading. As a result I decided to test exactly how much each JDA dependency contributes to final JAR size:

1. Tink - 4.4MB
2. Opus - 4.0MB
3. OkHttp - 3.0MB
4. Trove4J - 2.4MB
5. Jackson - 2.2MB
6. Commons Collections - 734KB
7. Websocket Client - 121KB
8. SLF4J - 66KB
9. Jetbrains Annotations - 30KB

The Opus dependency was obvious, but my bots don't need audio so I was already excluding that. Even bigger than that though was Tink. Turns out thats also just audio and can be excluded in the same way. This should definitely be documented somewhere similar to how the Opus dependency is treated.

As a sidenote, the entire Kotlin standard library being pulled in just to use OkHttp feels a bit wasteful.

[freya022]

While I think obsessing over JAR sizes is not necessary, it is reasonable enough to remove Tink when not using audio, you can open a PR documenting that.

As a side note, you can remove classes while shading to reduce the size. JDA builds minified artifacts, and you can look how it is done.

Another alternative when your bot runs in a container, is to not use shaded JARs, you can instead use jib to create docker images for your bot, which will efficiently build them.