Bear-mirror/bear-codegen/CLAUDE.md at agent-workflow-restructure

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Laszlo Nagy a2fcd51857 docs: explain the build pipeline per crate

Item #5 consolidated platform-checks but left the build pipeline
under-documented: contributors had to read three build.rs files
to find out who runs what, and the lld prerequisite was a silent
trap. This commit spreads that knowledge across CLAUDE.md files,
co-located with the crates each piece belongs to:

  - New platform-checks/CLAUDE.md: role, post-Item-#5 public API,
    recipe for adding a probe, scope boundary against the
    intercept-family list.
  - New bear-codegen/CLAUDE.md: build-time codegen role; YAML to
    OUT_DIR via include!(); snapshot-test contract.
  - New bear-completions/CLAUDE.md: why a separate crate
    (clap_complete cost), how it's actually invoked (distributor
    runs it; install.sh only picks up pre-generated files).
  - Top-level CLAUDE.md: short "Build pipeline" routing section
    pointing at the per-crate files; "Host requirements" calling
    out lld as a Linux-only prerequisite; routing table grew
    three entries.
  - bear/CLAUDE.md: replaced the narrow "Code generation"
    subsection with a "Build script" section that also covers
    INTERCEPT_LIBDIR validation and the rustc-env emissions
    consumed by installation.rs.
  - intercept-preload/CLAUDE.md: "Build script duties" listing
    the cc-shim build, exports list, and link directives, plus a
    pointer at src/c/shim.c as the source of truth for
    INTERCEPT_FAMILY.
  - integration-tests/CLAUDE.md: "Build script duties" describing
    the executable probes (single vs grouped cfgs) and the
    ccache-masquerade detection.

Side cleanup: dropped the dead `cargo:rustc-cfg=build_cdylib`
directive from intercept-preload/build.rs. It was emitted but
read by no source -- the existing comment claiming it forced
cdylib generation was misleading; cdylib production is decided
by Cargo.toml's crate-type, not by the cfg.

Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>

2026-04-30 11:57:36 +00:00

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bear-codegen

Build-time code generator for bear's compiler flag tables and recognition rules.

How it works

A regular library, not a build.rs itself.
Invoked from bear/build.rs via bear_codegen::generate(flags_dir, out_dir).
Reads bear/interpreters/*.yaml (compiler definitions) and writes generated Rust source into the consumer's OUT_DIR.
The bear crate pulls in the generated code via include!() in src/semantic/interpreters/.

Generated outputs

The set of generated module names matches the input shape; see src/lib.rs::generate for the current list. YAML schema validation lives in yaml_types.rs. Snapshot tests in tests/snapshots/ lock the generated output against accidental schema drift.

Adding a compiler

Read bear/interpreters/CLAUDE.md. After editing YAML, run cargo build to regenerate, then cargo test to validate (the snapshot tests will diff the generated tables).

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bear-codegen

How it works

Generated outputs

Adding a compiler

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