Azure Pipelines
I work on the Azure DevOps team and our Azure Pipelines service could be a good home. We’d definitely love to have you and while our regular open source offer is for 10 parallel build jobs across our hosted Mac, Linux and Windows pools, for a project as important to the community as rust-lang and rust-lang-nursery I’m very confident I’d be able to get Microsoft to cover 60 parallel build jobs needed for free.
You configure Azure Pipelines with yet another YAML file (azurepipelines.yaml). Here are a few example projects if you want to take a look about how it is configured:
The official help docs are here: https://docs.microsoft.com/en-us/azure/devops/pipelines/get-started-yaml?view=vsts and we have some guidance on the conversion of complex travis builds here: https://docs.microsoft.com/azure/devops/pipelines/migrate/from-travis?view=azure-devops
I’d be able to get some folks on the team to help out with getting the projects set up if you wanted to give it a try. You could run in parallel for a bit and see if it works for you.
Let me know if folks have any questions or want any help.