Use dependency-free Baggage module

[slashmo]

• Closes Move OpenTelemetryTracingSupport into swift-distributed-tracing-extras #53
• Closes Support automatic context propagation through task locals #54
• Closes Add withSpan overloads for automatic context propagation #55

[slashmo]

@tomerd Regarding CI we'd need the same update as for the Baggage repo. Remove 5.0 & 5.1 and add 5.4 & 5.5 instead.

[ktoso]

This is looking good! I'll get CI sorted out once California wakes up and I can poke some folks :)

[slashmo]

@yim-lee Looks like in this repo 5.4 & 5.5 are not yet required to pass by the branch protection rules. Could you please add that in as well?

[ktoso]

Seems to me we could merge this?

[slashmo]

The 5.5 CI failed due to the Ruby version not being high enough to install Jazzy:

ERROR: Error installing jazzy:
The last version of jazzy (>= 0) to support your Ruby & RubyGems was 0.13.7. Try installing it with gem install jazzy -v 0.13.7
jazzy requires Ruby version >= 2.6.3. The current ruby version is 2.5.0.

CC @ktoso

[ktoso]

I don't think we should do this in a library.

The current issue is just an outcome that we're removing/breaking Apis because all this is pre 1.x, it's not something we need to future guard against.

[ktoso]

very weird with that docker issue... I'll look into it with @yim-lee in the morning

[yim-lee]

@yim-lee Looks like in this repo 5.4 & 5.5 are not yet required to pass by the branch protection rules. Could you please add that in as well?

Sorry I missed this. I've made 5.4 and 5.5 required as well. FYI branch rules can be updated by any GH repo admin.

The 5.5 CI failed due to the Ruby version not being high enough to install Jazzy:

This is not specific to Swift 5.5 actually. One can reproduce it locally if they build the docker image with --no-cache I believe (at least I can).

To fix the problem, either do what the error message suggests and update docker/Dockerfile to do gem install jazzy -v 0.13.7, or modify it to use a newer Ruby version.

In case it helps, this mimics what CI does:

docker-compose -f docker/docker-compose.yaml -f docker/docker-compose.1804.55.yaml build

[slashmo]

@yim-lee Thanks! Specifying the version explicitly works 👍