headroom/rust-toolchain.toml

[toolchain]
# Pin to a specific stable version so CI and local use the EXACT same
# compiler. With `channel = "stable"`, CI runners (dtolnay/rust-
# toolchain@stable) always grab the latest stable while local dev
# machines run whatever version was last installed — a clippy lint
# added in a newer stable then breaks CI without firing locally
# (this happened on 2026-04-27: `unnecessary_sort_by` landed in
# clippy 1.95 while a dev box had 1.92). Pinning makes "passes
# locally" = "passes in CI" for every check that depends on the
# toolchain.
#
# Bump procedure: edit the channel string here, run `rustup update`,
# run `make ci-precheck`, fix any new lints, commit.
channel = "1.95.0"
components = ["rustfmt", "clippy"]
profile = "minimal"
feat(rust): scaffold workspace + parity harness (phase-0) Bootstrap the Rust port of Headroom. Additive only — no existing Python code modified. Ships the workshop, not the widgets. Layout Cargo.toml (workspace) + rust-toolchain.toml crates/headroom-core — transform library, stub only crates/headroom-proxy — axum binary, /healthz only crates/headroom-py — PyO3 cdylib, exposes headroom._core.hello() crates/headroom-parity — Rust-vs-Python oracle harness + parity-run CLI Tooling Makefile: test, test-parity, bench, build-proxy, build-wheel, fmt, lint .github/workflows/rust.yml: test, wheels (linux/mac), audit, parity-nightly deny.toml for cargo-deny Parity corpus tests/parity/recorder.py + scripts/record_fixtures.py 125 recorded fixtures across 5 leaf transforms (ccr, tokenizer, log_compressor, diff_compressor, cache_aligner) Docs RUST_DEV.md — developer setup and workspace reference docs/spec/022-rust-migration.md — migration plan and stage breakdown .gitignore: whitelist scripts/record_fixtures.py; ignore target/ Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com> 2026-04-24 13:39:48 -07:00			`[toolchain]`
fix(rust): clippy 1.95 unnecessary_sort_by + pin toolchain Two-part fix for the CI break that followed the previous push. Lint fix: `crates/headroom-core/src/transforms/smart_crusher/analyzer.rs:779` used `pairs.sort_by(\|a, b\| b.1.cmp(&a.1))`. Clippy 1.95 introduced `unnecessary_sort_by` and prefers `sort_by_key(\|b\| std::cmp::Reverse(b.1))` for the same desc-sort by a single field. Replaced. Functionally identical (both stable sorts on the count field descending; first-occurrence tie order preserved either way). Drift fix: The same lint passed locally on rust 1.92 / clippy 0.1.92 because the dev box hadn't been updated since December. CI runners use `dtolnay/rust-toolchain@stable` which always grabs the latest stable (1.95 today), so any lint added between local's last update and CI's runner image breaks the pre-push gate. Two ways to close this: 1. Pin a specific Rust version in `rust-toolchain.toml`. 2. Run `rustup update stable` before every push. Option 1 is more robust — `rust-toolchain.toml` is auto-respected by `cargo`, so any local check (or CI check using the same project) syncs to the pinned version automatically. Pinned to `1.95.0`. Bump procedure documented in the file: edit channel, `rustup update`, `make ci-precheck`, fix any new lints, commit. Verification: - `rustup` synced the dev box to 1.95.0 on the next `cargo` invocation. - `cargo clippy --workspace -- -D warnings` clean on 1.95. - `make ci-precheck` green (388 rust + 185 python + commitlint). 2026-04-27 12:11:49 -07:00			`# Pin to a specific stable version so CI and local use the EXACT same`
			# compiler. With `channel = "stable"`, CI runners (dtolnay/rust-
			`# toolchain@stable) always grab the latest stable while local dev`
			`# machines run whatever version was last installed — a clippy lint`
			`# added in a newer stable then breaks CI without firing locally`
			# (this happened on 2026-04-27: `unnecessary_sort_by` landed in
			`# clippy 1.95 while a dev box had 1.92). Pinning makes "passes`
			`# locally" = "passes in CI" for every check that depends on the`
			`# toolchain.`
			`#`
			# Bump procedure: edit the channel string here, run `rustup update`,
			# run `make ci-precheck`, fix any new lints, commit.
			`channel = "1.95.0"`
feat(rust): scaffold workspace + parity harness (phase-0) Bootstrap the Rust port of Headroom. Additive only — no existing Python code modified. Ships the workshop, not the widgets. Layout Cargo.toml (workspace) + rust-toolchain.toml crates/headroom-core — transform library, stub only crates/headroom-proxy — axum binary, /healthz only crates/headroom-py — PyO3 cdylib, exposes headroom._core.hello() crates/headroom-parity — Rust-vs-Python oracle harness + parity-run CLI Tooling Makefile: test, test-parity, bench, build-proxy, build-wheel, fmt, lint .github/workflows/rust.yml: test, wheels (linux/mac), audit, parity-nightly deny.toml for cargo-deny Parity corpus tests/parity/recorder.py + scripts/record_fixtures.py 125 recorded fixtures across 5 leaf transforms (ccr, tokenizer, log_compressor, diff_compressor, cache_aligner) Docs RUST_DEV.md — developer setup and workspace reference docs/spec/022-rust-migration.md — migration plan and stage breakdown .gitignore: whitelist scripts/record_fixtures.py; ignore target/ Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com> 2026-04-24 13:39:48 -07:00			`components = ["rustfmt", "clippy"]`
			`profile = "minimal"`