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Write a repo mapping manifest in the runfiles directory #16321

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Write a repo mapping manifest in the runfiles directory #16321

wants to merge 1 commit into from

Commits on Oct 21, 2022

  1. Write a repo mapping manifest in the runfiles directory 

    To ensure we can use repo mappings in the runfiles library, this change writes an extra file "my_binary_target.repo_mapping", which contains a bunch of (base_repo_canonical_name, apparent_repo_name, canonical_repo_name) triples. See https://github.com/bazelbuild/proposals/blob/main/designs/2022-07-21-locating-runfiles-with-bzlmod.md for more information.

The extra file is written using a new action "RepoMappingManifestAction", and it's only executed if we know for sure that Bzlmod is enabled. This avoid generating a lot of extra actions that are essentially useless for monorepo setups such as Google's.

Work towards #16124

PiperOrigin-RevId: 475820334
Change-Id: I885b4df093bd2c783c57d19f995f420b9b29b53c
    @Wyverald
    Wyverald authored and Copybara-Service committed Oct 21, 2022
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