[CP-beta]_downloadArtifacts (Web SDK) uses content-aware hashing in post-submit
#174310
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…mit (flutter#174236) Towards flutter#174225. Will need to get cherry-picked into 3.35 and 3.36.
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@matanlurey please fill out the PR description above, afterwards the release team will review this request. |
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Code Review
This pull request modifies the artifact download process for the Web SDK to use content-aware hashing for post-submit builds, which is more stable than using git revisions. A new contentHash variable is introduced in common.dart, calculated by executing a platform-specific script. The Environment class is updated to provide the flutterRootDir needed for this calculation. The CopyArtifactsStep is then updated to use this contentHash when downloading artifacts from Google Cloud Storage for non-try builds. The changes appear correct and well-implemented.
…e engine for the commit (#4845) #4844 was partially correct. However, PRs such as flutter/flutter#174310 are still blocked because they touch the engine, and try-bots (as of currently) only upload engines to a git SHA, not a content hash. This PR relaxes the try-bot logic to continue to provide the current SHA as "this is the engine" if the engine is being built from source. Implicitly, it will no longer provide `FLUTTER_PREBUILT_ENGINE_VERSION=` for the `master` branch, if and only if the engine is not being touched. That means `flutter <any command>` will start to download the engine using the content hash, which should be fine.
…3c4e79ac133bedd3cf32a1cf
56f64c2
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flutter:flutter-3.36-candidate.0
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