Implement --target_pattern_file flag for reading patterns from file

An alternative to https://github.com/bazelbuild/bazel/pull/10796 to fix https://github.com/bazelbuild/bazel/issues/8609.

As https://github.com/bazelbuild/bazel/issues/8609#issuecomment-590522448 points out there's currently a `--query_file` to read a query pattern from file, but there's no analogous feature available for build/test. Generic parameter file support attempted in https://github.com/bazelbuild/bazel/pull/10796 turns out to be a little more complex than expected due to bazel's client/server architecture and likely requires some design document.

This PR would fix help https://github.com/bazelbuild/bazel/issues/8609 without rushing into any designs, so we can spend time properly designing generic parameter files while also alleviating the immediate problem with a  known/simpler pattern.

Closes #10856.

PiperOrigin-RevId: 298953350
8 files changed
tree: 83b01847ec647807ca020a1fa6c9e9511056bf74
  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. CODEOWNERS
  15. combine_distfiles.py
  16. combine_distfiles_to_tar.sh
  17. compile.sh
  18. CONTRIBUTING.md
  19. CONTRIBUTORS
  20. distdir.bzl
  21. ISSUE_TEMPLATE.md
  22. LICENSE
  23. README.md
  24. WORKSPACE
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