| commit | ecb61eebbb93111b87a878ce920cd4914f7d47fb | [log] [tgz] |
|---|---|---|
| author | gregce <gregce@google.com> | Tue May 19 10:56:29 2020 -0700 |
| committer | Copybara-Service <copybara-worker@google.com> | Tue May 19 10:57:28 2020 -0700 |
| tree | 223affb27214e480602f869a178fa02d925ffa95 | |
| parent | 696e302b1765b2c7cfa9e24f4b9903ce39e27b60 [diff] |
Introduce configuration transition fragment declarations. See https://github.com/bazelbuild/bazel/issues/11258 for context. This essentially converts ConfigurationTransition.apply(BuildOptions...) to ConfigurationTransition.apply(RestrictedBuildOptions...). The new BuildOptionsView wraps BuildOptions while only allowing access to options fragments the transitions declare. Because there are a *lot* of uses of PatchTransition and SplitTransition, this change only adds a parallel interface to PatchTransition.patch and SplitTransition.split. Implementers continue to work as-is with the BuildOptions variant, while we can incrementally switch them over to the RestrictedBuildOptions variant at whatever pace we desire. This helps decouple risk of failing CI if/when we accidentally forget to migrate a few implementers or get their set of declared fragments wrong. This implements step 1 of https://github.com/bazelbuild/bazel/issues/11258. PiperOrigin-RevId: 312311815
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