google/crubit
Mar 2025 – Oct 2025
4 Months active
Languages Used
PythonBuildC++RustTOMLShellStarlark
Technical Skills
BazelBuild SystemAST ManipulationBuild System ConfigurationBuild SystemsC++
Michael VanBemmel
PROFILE
Michael Vanbemmel
Over four months, Michael Van Bemmel contributed to the google/crubit repository by enhancing Rust and C++ binding generation, focusing on build reliability, feature flag management, and test automation. He improved the build system using Bazel and Starlark, ensuring complete artifact tracking and reproducible outputs. Michael introduced and refined feature flags such as non_unpin_ctor, expanded attribute handling for ABI safety, and maintained compatibility with evolving Rust toolchains. His work included robust error handling, improved diagnostics, and observability through tracing. By integrating Rust, C++, and Python, he delivered maintainable solutions that strengthened binding surfaces and streamlined build and test workflows.
Overall Statistics
Feature vs Bugs
62%Features
Repository Contributions
20Total
Bugs
5
Commits
20
Features
8
Lines of code
1,156
Activity Months4
Your Network
4194 people
Work History
October 2025
8 Commits • 4 Features
Oct 1, 2025October 2025 progress for google/crubit focused on hardening Rust binding generation, expanding observability, and stabilizing build/test workflows. Key outcomes include ABI-safety improvements for binding generation, enhanced diagnostics through tracing, and expanded experimental/test coverage for non_unpin_ctor while improving repository maintenance and readability.
8 Commits • 4 Features
Oct 1, 2025October 2025 progress for google/crubit focused on hardening Rust binding generation, expanding observability, and stabilizing build/test workflows. Key outcomes include ABI-safety improvements for binding generation, enhanced diagnostics through tracing, and expanded experimental/test coverage for non_unpin_ctor while improving repository maintenance and readability.
October 2025
September 2025
7 Commits • 2 Features
Sep 1, 2025September 2025 monthly summary for google/crubit: Key features delivered and stability improvements: - NonUnpinCtor feature flag introduction and refactor: Consolidated non-Unpin type handling behind a new non_unpin_ctor feature across binding generation, replacing old Wrapper usage and updating generated headers to support non-Unpin types. This enables a broader, safer binding surface during release cycles. - Build system improvement: Added out_compiled output group to the cc_bindings_from_rust_aspect to ensure the rlib from _cc_api_impl.rs is captured for C++ bindings, improving build reproducibility and integration with downstream C++ projects. - Rustc API compatibility: region erasure adjustments to adapt to changes in rustc API for newer Rust versions, maintaining forward compatibility of the crubit toolchain. - Golden test diagnostics updated: Improved golden test error messages to reflect upstream LLVM changes, clarifying when bindings for certain C++ standard library types cannot be generated. - Test stability enhancement: Disabled caching in golden_update.sh to prevent stale test results from affecting golden test updates and ensure fresh runs. Overall impact and accomplishments: - Strengthened binding surface for non-Unpin types, enabling broader usage and safer integrations with minimal churn. - Improved build reliability and determinism for C++ bindings, accelerating release readiness. - Maintained compatibility with evolving Rust toolchains, reducing future maintenance burden. - Improved test clarity and reliability, decreasing post-merge surprises related to LLVM changes and cached results. Technologies/skills demonstrated: - Rust and C++ binding integration, feature flag design, and header generation workflows. - Build system instrumentation and Bazel-like output grouping (out_compiled). - Rust compiler version compatibility (region erasure changes) and LLVM/diagnostic awareness. - Test automation discipline, golden test management, and cache-control strategies.
September 2025
7 Commits • 2 Features
Sep 1, 2025September 2025 monthly summary for google/crubit: Key features delivered and stability improvements: - NonUnpinCtor feature flag introduction and refactor: Consolidated non-Unpin type handling behind a new non_unpin_ctor feature across binding generation, replacing old Wrapper usage and updating generated headers to support non-Unpin types. This enables a broader, safer binding surface during release cycles. - Build system improvement: Added out_compiled output group to the cc_bindings_from_rust_aspect to ensure the rlib from _cc_api_impl.rs is captured for C++ bindings, improving build reproducibility and integration with downstream C++ projects. - Rustc API compatibility: region erasure adjustments to adapt to changes in rustc API for newer Rust versions, maintaining forward compatibility of the crubit toolchain. - Golden test diagnostics updated: Improved golden test error messages to reflect upstream LLVM changes, clarifying when bindings for certain C++ standard library types cannot be generated. - Test stability enhancement: Disabled caching in golden_update.sh to prevent stale test results from affecting golden test updates and ensure fresh runs. Overall impact and accomplishments: - Strengthened binding surface for non-Unpin types, enabling broader usage and safer integrations with minimal churn. - Improved build reliability and determinism for C++ bindings, accelerating release readiness. - Maintained compatibility with evolving Rust toolchains, reducing future maintenance burden. - Improved test clarity and reliability, decreasing post-merge surprises related to LLVM changes and cached results. Technologies/skills demonstrated: - Rust and C++ binding integration, feature flag design, and header generation workflows. - Build system instrumentation and Bazel-like output grouping (out_compiled). - Rust compiler version compatibility (region erasure changes) and LLVM/diagnostic awareness. - Test automation discipline, golden test management, and cache-control strategies.
August 2025
4 Commits • 2 Features
Aug 1, 2025Summary for 2025-08 for google/crubit: Delivered notable features and fixes that enhance the reliability and usability of CRUBIT bindings, enabling faster iteration and more dependable outputs. Key features include attribute handling improvements with CRUBIT_UNSAFE_IGNORE_ATTR and a robust CollectUnknownAttrs via StatusOr, plus the addition of a build output group out_compiled for rust_bindings_from_cc_aspect to support basic validation of generated libraries. Major bug fix addressed clearer test failures by improving error messages in the assert_ir_matches! macro. Overall, these changes reduce debugging time, improve binding generation reliability, and provide clearer visibility into build artifacts. Technologies demonstrated include C++ annotation usage, Rust macro testing, StatusOr-style error handling, and build tooling for artifact validation.
4 Commits • 2 Features
Aug 1, 2025Summary for 2025-08 for google/crubit: Delivered notable features and fixes that enhance the reliability and usability of CRUBIT bindings, enabling faster iteration and more dependable outputs. Key features include attribute handling improvements with CRUBIT_UNSAFE_IGNORE_ATTR and a robust CollectUnknownAttrs via StatusOr, plus the addition of a build output group out_compiled for rust_bindings_from_cc_aspect to support basic validation of generated libraries. Major bug fix addressed clearer test failures by improving error messages in the assert_ir_matches! macro. Overall, these changes reduce debugging time, improve binding generation reliability, and provide clearer visibility into build artifacts. Technologies demonstrated include C++ annotation usage, Rust macro testing, StatusOr-style error handling, and build tooling for artifact validation.
August 2025
March 2025
1 Commits
Mar 1, 2025March 2025 — google/crubit: Strengthened the binding generation pipeline by fixing the build output collection for generated bindings. Implemented changes to ensure complete output tracking and reliability of the build system, improving CI stability and incremental builds across the repository.
March 2025
1 Commits
Mar 1, 2025March 2025 — google/crubit: Strengthened the binding generation pipeline by fixing the build output collection for generated bindings. Implemented changes to ensure complete output tracking and reliability of the build system, improving CI stability and incremental builds across the repository.
Activity
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Quality Metrics
Correctness83.6%
Maintainability83.0%
Architecture80.0%
Performance69.0%
AI Usage20.0%
Skills & Technologies
Programming Languages
BuildC++PythonRustShellStarlarkTOML
Technical Skills
API IntegrationAST ManipulationBazelBuild SystemBuild System ConfigurationBuild SystemsC++Code FormattingCode GenerationCode RefactoringCompiler DevelopmentCompiler InternalsDependency ManagementError HandlingFeature Flag Management
Repositories Contributed To
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