remote: implement a naive action-scoped file system

This change accompanies d480c5f [1] in that it registers
an action-scoped filesystem that supports lazily fetching
action inputs that are remotely stored outputs of an upstream
action. While in theory any native java action in Bazel could
do arbitrary file system operations in practice this is mostly
useful for
 * AbstractFileWriteAction (calls Path.getInputStream())
 * TemplateExpansionAction (calls Path.getInputStream())
 * SymlinkAction (calls Path.(isFile|isExecutable|createSymbolicLink)())
 * SolibSymlinkAction (calls Path.createSymbolicLink())

For Starlark actions we found that only ctx.actions.expand_template(...)
directly interacts with the file system (via TemplateExpansionAction).
All other methods on ctx.actions create spawns internally which are
covered by d480c5f.

Progress towards #6862.

[1] https://github.com/bazelbuild/bazel/commit/d480c5f5a4f38a4053ed3e3bcc4eaef343923d2d

Closes #7926.

PiperOrigin-RevId: 241717157
8 files changed
tree: 8c2390d33dc0e1a2b8df33223cde4a91431fd68e
  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

Build and test software of any size, quickly and reliably.

  • Speed up your builds and tests: Bazel only rebuilds what is necessary. With advanced local and distributed caching, optimized dependency analysis and parallel execution, you get fast and incremental builds.

  • One tool, multiple languages: Build and test Java, C++, Android, iOS, Go, and a wide variety of other language platforms. Bazel runs on Windows, macOS, and Linux.

  • Scalable: Bazel helps you scale your organization, codebase, and continuous integration solution. It handles codebases of any size, in multiple repositories or a huge monorepo.

  • Extensible to your needs: Easily add support for new languages and platforms with Bazel's familiar extension language. Share and re-use language rules written by the growing Bazel community.

Getting Started

Documentation

Contributing to Bazel

See CONTRIBUTING.md

Build status

Bazel is released in ‘Beta’. See the product roadmap to learn about the path toward a stable 1.0 release.