Add support for allow_closure in args.add_all and args.add_joined

In some situations, it can be useful to (carefully) close over values from the
rule implementation. The error is still useful as the default experience
because it's not generally safe/efficient to pass arbitrary closures.

The intended use case is when `map_each` depends on simple primitive values
coming from the build attributes that can't be turned into a `format_each`
string because they affect the result of the `map_each` return values.

Fixes https://github.com/bazelbuild/bazel/issues/13730

RELNOTES[NEW]: Args.add_all and Args.add_joined can now accept closures in
map_each if explicitly enabled via allow_closure.

PiperOrigin-RevId: 390379968
5 files changed
tree: 5f218ff9a28b1c77c30f7f64d06ba80af651a1cb
  1. .bazelci/
  2. examples/
  3. scripts/
  4. site/
  5. src/
  6. third_party/
  7. tools/
  8. .bazelrc
  9. .gitattributes
  10. .gitignore
  11. AUTHORS
  12. BUILD
  13. CHANGELOG.md
  14. CODEBASE.md
  15. CODEOWNERS
  16. combine_distfiles.py
  17. combine_distfiles_to_tar.sh
  18. compile.sh
  19. CONTRIBUTING.md
  20. CONTRIBUTORS
  21. distdir.bzl
  22. distdir_deps.bzl
  23. ISSUE_TEMPLATE.md
  24. LICENSE
  25. README.md
  26. WORKSPACE
README.md

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