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For changesets that affect binaries, use the new binary file content hash as an effect hash
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Authored by epriestley on Apr 27 2020, 3:29 PM.
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F15305560: D21174.id.diff
Thu, Mar 6, 3:01 AM
F15304393: D21174.id50422.diff
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Details

Summary

Ref T13522. When changesets update an image, we currently compute no effect hash. A content hash of the image (or other binary file) is a reasonable effect hash, and enalbes effect-hash-based behavior, including hiding files in intradiffs.

Test Plan
  • Created a revision affecting cat.png and quack.txt (currently, there must be 2+ changesets to trigger the hide logic).
  • Updated it with the exact same changes.
  • Viewed revision:
    • Saw the image renderered in the interdiff.
  • Applied patch.
  • Ran bin/differential rebuild-changesets ....
  • Viewed revision:
    • Saw both changesets collapse as unchanged.

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