Make HTTP cache works with cache eviction.

Previously, it's possible for an HTTP cache to delete CAS entries referenced by AC without deleting the AC itself because HTTP cache doesn't understand the relationship between AC and CAS. This could result in permanent build errors because Bazel always trust the AC from remote cache assuming all referenced CAS entries exist.

Now, we record the digest of lost blobs before build rewinding, so that during the next build, we can ignore the stale AC and continue with execution.

Fixes #18696.

RELNOTES: Added support for using a remote cache that evicts blobs and doesn't have AC integrity check (e.g. HTTP cache).
PiperOrigin-RevId: 672536163
Change-Id: Ic1271431d28333f6d86e5963542d15a133075157
14 files changed
tree: 98d83b35b896631833083b50f398a4e394318adf
  1. .bazelci/
  2. .github/
  3. examples/
  4. scripts/
  5. site/
  6. src/
  7. third_party/
  8. tools/
  9. .bazelrc
  10. .bazelversion
  11. .gitattributes
  12. .gitignore
  13. AUTHORS
  14. bazel_downloader.cfg
  15. BUILD
  16. CHANGELOG.md
  17. CODE_OF_CONDUCT.md
  18. CODEOWNERS
  19. combine_distfiles.py
  20. combine_distfiles_to_tar.sh
  21. compile.sh
  22. CONTRIBUTING.md
  23. CONTRIBUTORS
  24. distdir.bzl
  25. extensions.bzl
  26. LICENSE
  27. maven_install.json
  28. MODULE.bazel
  29. MODULE.bazel.lock
  30. rbe_extension.bzl
  31. README.md
  32. repositories.bzl
  33. requirements.txt
  34. SECURITY.md
  35. WORKSPACE.bzlmod
  36. workspace_deps.bzl
README.md

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