| <p><code>List of <a href="../build-ref.html#labels">labels</a>; optional</code></p> |
| |
| <p> |
| The list of environments this rule can be built for, in addition to |
| default-supported environments. |
| </p> |
| |
| <p> |
| This is part of Bazel's soft-launched constraint system, which lets users |
| declare which rules can and cannot depend on each other. For example, |
| externally deployable binaries shouldn't depend on libraries with |
| company-secret code. See |
| <a href="https://github.com/bazelbuild/bazel/blob/master/src/main/java/com/google/devtools/build/lib/analysis/constraints/ConstraintSemantics.java#L46"> |
| ConstraintSemantics</a> for details. |
| </p> |
