Add brotli to sourcebuild container

[agocke]

Part of dotnet/runtime#107225

[mthalman]

This new dependency will need to be applied equally to all the container images used for source build. Please ensure that all of these contain brotli if they don't already: https://github.com/dotnet/sdk/blob/7dc1e29627f20d47213ef2623b9e74b0e3cb4a4f/eng/pipelines/templates/variables/vmr-build.yml#L15-L28

[agocke]

Thanks for the list, thought it was strange we only had one source build image.

[agocke]

One thing is: I only need to update non-portable builds. Which ones are those?

[mthalman]

One thing is: I only need to update non-portable builds. Which ones are those?

All of the builds for source build are non-portable.

[agocke]

Does source build support cross build? Or does it just share the container?

[mthalman]

Does source build support cross build? Or does it just share the container?

We don't run cross build in these containers for source build. Unified build has its own set of containers for cross build: https://github.com/dotnet/sdk/blob/7dc1e29627f20d47213ef2623b9e74b0e3cb4a4f/eng/pipelines/templates/variables/vmr-build.yml#L29-L48

[mthalman]

What about Fedora: https://github.com/dotnet/dotnet-buildtools-prereqs-docker/blob/main/src/fedora/40/amd64/Dockerfile. I see it already implicitly has libbrotli installed, but not brotli-devel.

[agocke]

@mthalman Thanks, fixed.