Treat parsed option values differently by option type.

There is a vexingly large world of possible option types, each with its own quirks of how it interfaces with new inputs as they come in: values can be
- overridden (default)
- concatenated (allowMultiple)
- flattened (allowMultiple that accepts list inputs)
- disappear into additional flag inputs (expansion flags)
Or some combination of the above, in the case of flags with implicit dependencies and wrapper options.

Begin removing the error-prone treatment of all option types with conditional branches. This model of the different options will make it much easier to isolate the option-type specific logic with the command-line parsing logic. Flags that affect other flags (implicit requirements, expansions, and wrappers) will be migrated in a later change.

This CL does not change flag parsing semantics, just migrates the current parsing logic to the new class structure.

RELNOTES: None.
PiperOrigin-RevId: 169239182
4 files changed
tree: 49efdb3800c001564310c05a1394cc84fe66fb7c
  1. examples/
  2. scripts/
  3. site/
  4. src/
  5. third_party/
  6. tools/
  7. .gitattributes
  8. .gitignore
  9. AUTHORS
  10. BUILD
  11. CHANGELOG.md
  12. combine_distfiles.py
  13. combine_distfiles_to_tar.sh
  14. compile.sh
  15. CONTRIBUTING.md
  16. CONTRIBUTORS
  17. ISSUE_TEMPLATE.md
  18. LICENSE
  19. README.md
  20. WORKSPACE
README.md

Bazel

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