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  • Add an executable / script to download spec tests (copied from ssz-z)
    • controlled via an options module (can be overridden by updating zbuild.zon or -D flag
  • zbuild run download_spec_tests or zig build run:download_spec_tests to execute

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Summary of Changes

Hello @wemeetagain, I'm Gemini Code Assist1! I'm currently reviewing this pull request and will post my feedback shortly. In the meantime, here's a summary to help you and other reviewers quickly get up to speed!

This pull request introduces a new executable that automates the process of downloading and extracting Ethereum consensus spec tests. This enhancement streamlines the setup for testing environments by providing a dedicated tool to fetch necessary test data, configurable through build options.

Highlights

  • New Executable: A download_spec_tests executable has been added to facilitate the automated download and extraction of Ethereum consensus spec tests.
  • Configurable Options: The executable's behavior, including the spec test URL, version, and output directory, can be customized via an options module, allowing overrides through zbuild.zon or command-line flags.
  • Build System Integration: The new executable is fully integrated into the build system, allowing it to be run using zbuild run download_spec_tests or zig build run:download_spec_tests.
  • Test Data Management: The .gitignore file has been updated to properly ignore the downloaded spec test directory, ensuring clean repository state.
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Code Review

This pull request introduces a new executable script for downloading consensus spec tests, which is a great addition for managing test data. The changes to the build configuration in build.zig and zbuild.zon are well-structured. However, the implementation of the download script in test/spec/download_spec_tests.zig contains a critical bug in the file download logic, a resource leak, and some areas where error handling could be improved. I've provided specific comments and code suggestions to address these points.

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github-actions bot commented Sep 2, 2025

Performance Report

✔️ no performance regression detected

Full benchmark results
Benchmark suite Current: 65673ff Previous: null Ratio
get values - 1000 331.00 ns/op
get values - naive - 1000 501.00 ns/op
set values - 1000 326.00 ns/op
set values - naive - 1000 604.00 ns/op
get values - 1000000 894.00 ns/op
get values - naive - 1000000 1.5060 us/op
set values - 1000000 885.00 ns/op
set values - naive - 1000000 2.1160 us/op
JS - computeSyncCommitteeIndices - 16384 indices 324.81 ms/op
Zig - computeSyncCommitteeIndices - 16384 indices 4.2142 ms/op
JS - computeSyncCommitteeIndices - 250000 indices 306.28 ms/op
Zig - computeSyncCommitteeIndices - 250000 indices 17.350 ms/op
JS - computeSyncCommitteeIndices - 1000000 indices 317.58 ms/op
Zig - computeSyncCommitteeIndices - 1000000 indices 32.800 ms/op
JS - unshuffleList - 16384 indices 930.03 us/op
Zig - unshuffleList - 16384 indices 581.01 us/op
JS - unshuffleList - 250000 indices 13.511 ms/op
Zig - unshuffleList - 250000 indices 8.7894 ms/op
JS - unshuffleList - 1000000 indices 54.275 ms/op
Zig - unshuffleList - 1000000 indices 35.406 ms/op

by benchmarkbot/action

@wemeetagain wemeetagain merged commit 58d65ee into main Sep 2, 2025
12 checks passed
ensi321 pushed a commit that referenced this pull request Sep 6, 2025
* feat: add download_spec_tests executable

* chore: resource cleanup

* chore: resource cleanup
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