Add build option --repo_env

Add an option to environment variables only for repository rules. This
change is not about making more environment variables available to repository
rules, as they have access to the whole environment anyway. However, having
an option to set environment variables allows to use the config mechanism
of .bazelrc to pass information to external repositories without invalidating
the whole action graph.

This way of using external repositories to change sources according to the used
configuration is might not be in line with the idea of bazel to be able to build
for all configurations from the same source tree, but there is sufficient demand
for such a feature.

Change-Id: Ib312958f5faa055863f1cd643efbcff63d0b16a3
PiperOrigin-RevId: 243810658
8 files changed
tree: 89ca5b2109491ba7dec7a412cc0725f0eeca8b97
  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. CODEOWNERS
  14. combine_distfiles.py
  15. combine_distfiles_to_tar.sh
  16. compile.sh
  17. CONTRIBUTING.md
  18. CONTRIBUTORS
  19. distdir.bzl
  20. ISSUE_TEMPLATE.md
  21. LICENSE
  22. README.md
  23. WORKSPACE
README.md

Bazel

{Fast, Correct} - Choose two

Build and test software of any size, quickly and reliably.

  • Speed up your builds and tests: Bazel only rebuilds what is necessary. With advanced local and distributed caching, optimized dependency analysis and parallel execution, you get fast and incremental builds.

  • One tool, multiple languages: Build and test Java, C++, Android, iOS, Go, and a wide variety of other language platforms. Bazel runs on Windows, macOS, and Linux.

  • Scalable: Bazel helps you scale your organization, codebase, and continuous integration solution. It handles codebases of any size, in multiple repositories or a huge monorepo.

  • Extensible to your needs: Easily add support for new languages and platforms with Bazel's familiar extension language. Share and re-use language rules written by the growing Bazel community.

Getting Started

Documentation

Contributing to Bazel

See CONTRIBUTING.md

Build status

Bazel is released in ‘Beta’. See the product roadmap to learn about the path toward a stable 1.0 release.