Querying the remote Capabilities service for remote execution/cache builds.

- call the Capabilities API once per command and save the server capabilities
- check the server API version in order to issue a warning if client uses an unsupported or deprecated version
- check that server supports execution, if remote execution is requested, error otherwise
- check that server digest function matches the client, error otherwise
- check that updating action cache is enabled if requested, error otherwise

Minor refactoring of the RemoteModule initialization logic for clarity. I decided to provide the resulting ServerCapabilities to the remote classes (e.g. RemoteSpawnRunner) on initialization; a different way to do this would be to provide them a handle to the client, and allow lazy fetch. I initially implemented the latter, but switched to the former because it is much simpler.

RELNOTES: query remote server Capabilities (per REAPI v2)
PiperOrigin-RevId: 216353089
23 files changed
tree: 60eeeccb6163b0267383d3e36113305630aecfc6
  1. .bazelci/
  2. examples/
  3. scripts/
  4. site/
  5. src/
  6. third_party/
  7. tools/
  8. .gitattributes
  9. .gitignore
  10. AUTHORS
  11. BUILD
  12. CHANGELOG.md
  13. CODEOWNERS
  14. combine_distfiles.py
  15. combine_distfiles_to_tar.sh
  16. compile.sh
  17. CONTRIBUTING.md
  18. CONTRIBUTORS
  19. distdir.bzl
  20. ISSUE_TEMPLATE.md
  21. LICENSE
  22. README.md
  23. WORKSPACE
README.md

Bazel

{Fast, Correct} - Choose two

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Documentation

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See CONTRIBUTING.md

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