feat: add download functionality to barretenberg-rs build.rs#20105
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johnathan79717 merged 4 commits intomerge-train/barretenbergfrom Feb 3, 2026
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feat: add download functionality to barretenberg-rs build.rs#20105johnathan79717 merged 4 commits intomerge-train/barretenbergfrom
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…raries - build.rs now downloads libbb-external.a from GitHub releases when local cpp build is not available - Add test_download command to bootstrap.sh to verify download path works - Uses BARRETENBERG_VERSION env var or falls back to crate version - Blocks version 0.0.1 to prevent accidental downloads during development
- Add BB_LOCAL_BUILD env var to force local build and fail with helpful message if libbb-external.a is not found (instead of silently downloading) - Add retry logic (3 attempts) to test_download for network flakiness 🤖 Generated with [Claude Code](https://claude.com/claude-code) Co-Authored-By: Claude <[email protected]>
Now the default behavior is to download from GitHub releases. Set BB_LOCAL_BUILD=1 to use local cpp/build/lib instead (for monorepo development). 🤖 Generated with [Claude Code](https://claude.com/claude-code) Co-Authored-By: Claude <[email protected]>
Instead of BB_LOCAL_BUILD=1, use BB_LIB_DIR=/path/to/lib to specify where libbb-external.a is located. More flexible and explicit. 🤖 Generated with [Claude Code](https://claude.com/claude-code) Co-Authored-By: Claude <[email protected]>
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Re-lands the download functionality from #20105 with the following fixes: - Check for all 0.x.x development versions, not just 0.0.1 - Set BB_LIB_DIR in build function (ffi feature is on by default) The build.rs now properly detects development versions and requires either BARRETENBERG_VERSION to be set to a released version, or BB_LIB_DIR to point to a local build.
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Re-lands the download functionality from #20105 with the following fixes: - Check for all 0.x.x development versions, not just 0.0.1 - Set BB_LIB_DIR in build function (ffi feature is on by default) The build.rs now properly detects development versions and requires either BARRETENBERG_VERSION to be set to a released version, or BB_LIB_DIR to point to a local build.
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Re-lands the download functionality from #20105 with the following fixes: - Check for all 0.x.x development versions, not just 0.0.1 - Set BB_LIB_DIR in build function (ffi feature is on by default) The build.rs now properly detects development versions and requires either BARRETENBERG_VERSION to be set to a released version, or BB_LIB_DIR to point to a local build.
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## Summary Re-lands the download functionality from #20105 with the following fixes: - Check for all 0.x.x development versions, not just 0.0.1 - Set BB_LIB_DIR in build function (ffi feature is on by default) The build.rs now properly detects development versions and requires either BARRETENBERG_VERSION to be set to a released version, or BB_LIB_DIR to point to a local build. ## Test plan - CI will verify the build and tests pass
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BEGIN_COMMIT_OVERRIDE cherchore: graph tooling audit 0 (#19691) chore: opt sol scope renaming (#20123) feat: add download functionality to barretenberg-rs build.rs (#20105) fix: set BB_LIB_DIR in build function (ffi feature is on by default) Revert barretenberg-rs download functionality feat: re-land barretenberg-rs download functionality with fixes (#20128) fix: skip FFI feature in PipeBackend tests fix: skip FFI feature in PipeBackend tests END_COMMIT_OVERRIDE
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Summary
This PR adds download functionality to barretenberg-rs
build.rsto fetch pre-built static libraries from GitHub releases.What this PR does:
build.rsnow downloadslibbb-external.afrom GitHub releases when local cpp build is not availabletest_downloadcommand tobootstrap.shto verify download path worksBARRETENBERG_VERSIONenv var or falls back to crate version0.0.1to prevent accidental downloads during developmentDownload logic:
../../cpp/build/lib/libbb-external.a(for development)https://github.com/AztecProtocol/aztec-packages/releases/download/v{version}/barretenberg-static-{arch}-linux.tar.gzOUT_DIRTest command:
Test plan
BARRETENBERG_VERSION=0.0.1-commit.d431d1c ./bootstrap.sh test_download