Provide clearer messaging when a build fails because a rule's
supported environments get refined away by incompatible
select paths.

This is a fix of TODO:   
https://github.com/bazelbuild/bazel/blob/master/src/main/java/com/google/devtools/build/lib/analysis/constraints/ConstraintSemantics.java#L597

Old message:
  ERROR: /workspace/foo/BUILD:3:1: in cc_binary rule //foo:main: all environments have been refined out of the following groups: //buildenv:environment_group

New message:
  ERROR: /workspace/foo/BUILD:3:1: in cc_binary rule //foo:main: the current command-line flags disqualify all supported environments because of incompatible select() paths:
 environment: //buildenv:gce removed by: //util/lib:some_dep_with_select (/workspace/util/lib/BUILD:12:1)

--
MOS_MIGRATED_REVID=125788804
6 files changed
tree: d1e0fd23dee74e01accae7700a02bc70256ed53f
  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. compile.sh
  13. CONTRIBUTING.md
  14. CONTRIBUTORS
  15. LICENSE.txt
  16. README.md
  17. WORKSPACE
README.md

Bazel (Beta)

{Fast, Correct} - Choose two

Bazel is a build tool that builds code quickly and reliably. It is used to build the majority of Google‘s software, and thus it has been designed to handle build problems present in Google’s development environment, including:

  • A massive, shared code repository, in which all software is built from source. Bazel has been built for speed, using both caching and parallelism to achieve this. Bazel is critical to Google's ability to continue to scale its software development practices as the company grows.

  • An emphasis on automated testing and releases. Bazel has been built for correctness and reproducibility, meaning that a build performed on a continuous build machine or in a release pipeline will generate bitwise-identical outputs to those generated on a developer's machine.

  • Language and platform diversity. Bazel's architecture is general enough to support many different programming languages within Google, and can be used to build both client and server software targeting multiple architectures from the same underlying codebase.

Find more background about Bazel in our FAQ.

Getting Started

About the Bazel project: