How can I share coverage information between build stages in PRs from forks?

[dominic]

Sorry for the delay of my reply but I thought you might be interested in this new feature we have released:

Introducing Workspaces

We are working on workspaces, a new way of sharing files within a build. Workspaces allow jobs within a build to share files. They are useful when you want to use build artifacts from a previous job; for example, you create a cache that can be used in multiple jobs later. Example configurations and further information can be found in https://docs.travis-ci.com/user/using-workspaces/. We very much appreciate your feedback here. Thank you!

It would allow you to share files within one build without requiring an external hosting provider nor sharing its credentials.

Let us know what you think in the linking post.

Thanks!