Bump matrix-sdk dependency to 0.8.

[dstu]

This accommodates recent protocol changes and addresses #378.

[vkleen]

It looks like a flake.nix needs to be updated as well like in #214.

[bnjbvr]

Hi! Rust SDK maintainer over here. Thanks for doing this PR, it's interesting for us to see how many breaking changes we've introduced, and this helped me realized a doc comment was wrong about compute_display_name(). I made a few suggestions below, but generally the code looks good to me.

[ulyssa]

The changes here look good to me! I'm going to try this out locally a little bit first, but I think the only thing left that this needs is a run of cargo +nightly fmt to fix CI.

[dstu]

Hm, it looks like matrix-sdk 0.9 just got released (in the last 20 days). Happy to keep get this merged and then work on migrating to 0.9. But, if it's better to jump straight to 0.9, then I can transition to that.

[dstu]

It looks like a flake.nix needs to be updated as well like in #214.

I'm not familiar with Nix packaging. I took a cursory look and didn't see a quick path to addressing this that I understood. I don't see dependency hashes listed in flake.nix (which appears to be one of the things that #214 addressed). Is there anything in particular I should consult to get this taken care of?

[dstu]

The changes here look good to me! I'm going to try this out locally a little bit first, but I think the only thing left that this needs is a run of cargo +nightly fmt to fix CI.

Thanks, glad to hear it! This should be set.

[vkleen]

It looks like a flake.nix needs to be updated as well like in #214.

I'm not familiar with Nix packaging. I took a cursory look and didn't see a quick path to addressing this that I understood. I don't see dependency hashes listed in flake.nix (which appears to be one of the things that #214 addressed). Is there anything in particular I should consult to get this taken care of?

I think it should be enough to bump the rust nightly version in rustNightly = pkgs.rust-bin.nightly."...".default;. If there isn't a recent enough version to satisfy matrix-sdk, a nix flake update should fix that.

[dstu]

I think it should be enough to bump the rust nightly version in rustNightly = pkgs.rust-bin.nightly."...".default;. If there isn't a recent enough version to satisfy matrix-sdk, a nix flake update should fix that.

Thanks! This is done.

[almindor]

A bit of a tangent, but I noticed that iamb currently is very power hungry, it's in fact the higher power creep on my laptop. I delved a bit deeper and found that while the two main workers are efficient (e.g. the input handler and the sdk requests worker), there are a bunch of "forever" refresher workers that just sleep for a time (2-5s or so) and refresh entire sets of data.

I noticed that as part of matrix-sdk v0.8 they mention:

Introduce a mechanism similar to Client::add_event_handler and
Client::add_room_event_handler but with a reactive programming pattern. Add
Client::observe_events and Client::observe_room_events.

Do I understand correctly that this could be used to replace the inefficient refreshers?