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[6.2.0] Correctly handle templated tree artifacts in the prefetcher. #17735

Merged
merged 1 commit into from
Mar 11, 2023
Merged

[6.2.0] Correctly handle templated tree artifacts in the prefetcher. #17735

merged 1 commit into from
Mar 11, 2023

Commits on Mar 10, 2023

  1. [6.2.0] Correctly handle templated tree artifacts in the prefetcher. 

    Due to the existence of templated tree artifacts (tree artifacts where each file is produced by a separate action) and nested artifacts (artifacts whose output path is a descendant of another artifact's), the prefetcher must not assume every tree artifact is fetched as a whole.

In addition, concurrent actions calling the prefetcher might write to the same directory in the output tree, so they must synchronize when making the directory temporarily writable.

Fixes bazelbuild#16333.

PiperOrigin-RevId: 513205572
Change-Id: I827c4643643f63c9425e63bdf9177805c5f0f409
    @tjgq
    tjgq committed Mar 10, 2023
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