BlazeOptionHandler: only check in the parent directory, if there is one

When checking for a file called DO_NOT_BUILD_HERE in the parent direcotry of the
workspace path, first verify that there is such a parent directory. This avoids
a null pointer exception if the WORKSPACE file is in the top-level directory.

Fixes #5349

Change-Id: I81289a27a3f7fb0f4b5a112343de1b454fb5b8c5
PiperOrigin-RevId: 199790735
2 files changed
tree: aea2065005927246209d2c42592d922ddd1c803f
  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. combine_distfiles.py
  14. combine_distfiles_to_tar.sh
  15. compile.sh
  16. CONTRIBUTING.md
  17. CONTRIBUTORS
  18. distdir.bzl
  19. ISSUE_TEMPLATE.md
  20. LICENSE
  21. README.md
  22. WORKSPACE
README.md

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