Preserve relative order of explicit and expanded Starlark flags

Previously, Starlark flags expanded from a --config stanze would always
be added to the end of the residue containing the explicitly given
Starlark flags. As a result, Starlark flags expanded from --config could
not be overridden.

With this commit, Starlark flags are parsed with the same semantics as
a regular allowMultiple option, thus preserving their order through
expansions.

This is implemented by introducing a synthetic allowMultiple option of
type List<String> in OptionsParserImpl that skipped args are parsed
into.

As a result, Starlark options are now available from the new
getSkippedArgs() method on OptionsParser rather than as part of the
residue, with the latter now only containing build targets.

Fixes #13231
Fixes #15679

Closes #15807.

PiperOrigin-RevId: 467931815
Change-Id: Ic64c6e075c08d898e5e7b8bf4c777827134d89fa
12 files changed
tree: e13d842bc52cd9561225bd94fc24aac76cec4112
  1. .bazelci/
  2. .github/
  3. examples/
  4. scripts/
  5. site/
  6. src/
  7. third_party/
  8. tools/
  9. .bazelrc
  10. .gitattributes
  11. .gitignore
  12. AUTHORS
  13. BUILD
  14. CHANGELOG.md
  15. CODE_OF_CONDUCT.md
  16. CODEBASE.md
  17. CODEOWNERS
  18. combine_distfiles.py
  19. combine_distfiles_to_tar.sh
  20. compile.sh
  21. CONTRIBUTING.md
  22. CONTRIBUTORS
  23. distdir.bzl
  24. distdir_deps.bzl
  25. LICENSE
  26. MODULE.bazel
  27. README.md
  28. SECURITY.md
  29. WORKSPACE
  30. WORKSPACE.bzlmod
README.md

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