docs(howto): add optional feature loading guide - #4003
Merged
rickeylev merged 2 commits intoAug 5, 2026
Conversation
Add documentation showing how to use features.loadable_symbols, features.targets, and features.version for multi-version compatibility in macros, BUILD files, and repository rules.
rickeylev
enabled auto-merge
August 5, 2026 04:09
aignas
approved these changes
Aug 5, 2026
This file contains hidden or bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
Sign up for free
to join this conversation on GitHub.
Already have an account?
Sign in to comment
2 participants
Add this suggestion to a batch that can be applied as a single commit.This suggestion is invalid because no changes were made to the code.Suggestions cannot be applied while the pull request is closed.Suggestions cannot be applied while viewing a subset of changes.Only one suggestion per line can be applied in a batch.Add this suggestion to a batch that can be applied as a single commit.Applying suggestions on deleted lines is not supported.You must change the existing code in this line in order to create a valid suggestion.Outdated suggestions cannot be applied.This suggestion has been applied or marked resolved.Suggestions cannot be applied from pending reviews.Suggestions cannot be applied on multi-line comments.Suggestions cannot be applied while the pull request is queued to merge.Suggestion cannot be applied right now. Please check back later.
Macro and rule authors need clear guidance on writing Bazel code that
remains compatible across multiple rules_python releases as new APIs are
introduced. Previously, using features.loadable_symbols, targets, and
version lacked dedicated documentation, making it harder for developers
to know how to use these feature-detection APIs.
Add a how-to guide (docs/howto/optional-feature-loading.md) showing
how to inspect //python:features.bzl and generate compatibility repo
rules, BUILD files, and macro version checks.