Add capability for Pekko Streams

[mdedetrich]

The context of this change is to try and add pekko-http (open source akka fork) to sttp. Currently pekko (and pekko-http) only has snapshots released, the intention behind adding pekko-http to sttp at this stage is to identify if there are any problems before the initial full release.

Due to pekko still being a snapshot and sttp having multiple modules (with sttp-shared being a root module for sttp) I am not entirely sure whats the best way to handle this. You could just merge this PR into master and create a snapshot of sttp-shared but it can be said that this can "pollute" main with a module thats not ready yet. Other alternatives is to make a specific branch for pekko in this git repo which will eventually get merged into master once pekko is ready and you can make snapshot releases of sttp-shared from that pekko branch. Yet another option is to just make sttp-shared snapshots from this PR manually without merging it.

[adamw]

We don't really do snapshot releases (not sure if that's configured at all ...), but if that would be a blocker for you, I can try :). However, it would much more convenient to have some release, even if it's 0.0.1

[mdedetrich]

However, it would much more convenient to have some release, even if it's 0.0.1

So I normally would have zero problem with this, the unfortunate thing is that since Pekko is under ASF there is a lot of process/rigmarole (for good reasons) in making a release even if it just 0.0.1 (i.e. formal voting, vetting etc etc) and the whole idea here is to see if there are any potential problems before a release is made.

[adamw]

I did try to make a snapshot release from the branch to see if this works at all, but so far sonatype seems to be down, so I'll try later ;)

[mdedetrich]

I did try to make a snapshot release from the branch to see if this works at all, but so far sonatype seems to be down, so I'll try later ;)

No worries. Thanks for spending your time doing this, greatly appreciated!

[adamw]

Hm I think this worked ... can you see if https://s01.oss.sonatype.org/content/repositories/snapshots/com/softwaremill/sttp/shared/pekko_2.13/1.3.14+1-51f34857-SNAPSHOT/ is sufficient?

[mdedetrich]

Hm I think this worked ... can you see if https://s01.oss.sonatype.org/content/repositories/snapshots/com/softwaremill/sttp/shared/pekko_2.13/1.3.14+1-51f34857-SNAPSHOT/ is sufficient?

Looks good on my end, able to resolve it in sttp fine. Will open up the main sttp PR and will also do some testing.

Thanks again!

[adamw]

Great, so I'll leave this PR open, and once we have a non-SNAPSHOT release, we'll be able to merge