Ryth Azhur
43bcf3f26f
The Mizan codegen substrate moves off JavaScript template-literal emission
onto a compiled Rust binary that consumes the same OpenAPI + x-mizan-* IR
the JS substrate consumed. Three structural wins fall out of one move:
1. Moat closes. The codegen logic (how `affects` becomes auto-invalidation,
how named contexts collapse onto bundled fetches, how the registry-to-
Provider mapping is shaped) ships compiled instead of as source bytes
in every consumer's node_modules.
2. Pattern F (lines.push append-walls) becomes structurally unauthorable.
The emit substrate is askama templates in templates/<target>/*.j2 —
actual target-language files with {{ ... }} substitution markers,
syntax-highlighted natively, type-checked against the render context
structs at compile time. The Rust emit modules build typed render
contexts and call .render(); no string-builder surface exists.
3. OpenAPI `default`-bearing fields now emit as non-optional in TS / Python
/ Rust — the server always populates them, so consumer code reads them
without nullable checks. Surfaced by Blazr's typecheck on regeneration.
Layout:
frontends/mizan-rust/ — Rust port of @mizan/base; #[cfg(feature="pyo3")]
exposes PyMizanClient for the Python target.
protocol/mizan-codegen/ — codegen binary source + askama templates.
protocol/mizan-generate/ — npm-package shim. bin/launcher.mjs dispatches
to the platform-appropriate prebuilt binary.
Old generator/ JS tree deleted.
tests/rust/ — wire-parity drivers. drive_kernel exercises
raw client.call() / fetch_context(); drive_emitted
exercises the typed crate the codegen emits.
tests/afi/afi_codegen_app.py — codegen entrypoint module (imports + registers).
backends/mizan-fastapi/.../schema.py — adds outputNullable so the Rust
codegen can wrap T | None responses in Option<T>.
Verification:
- 20 mizan-codegen tests green (IR deserialization, byte-equivalent
parity vs JS baseline for stage1/rust/python/react/vue/svelte,
structural test for channels).
- tests/rust/run_wire_parity.py — 12/12 probes green via the Rust binary
driving the FastAPI fixture end-to-end.
Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>
41 lines
1.1 KiB
Python
41 lines
1.1 KiB
Python
"""Regenerate the wire-parity fixture_client crate via the Rust codegen binary.
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Drives the Rust `mizan-generate` binary against `tests/rust/mizan.toml`,
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which points at the AFI fixture's FastAPI registration module. Output
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lands under `tests/rust/fixture_client/` and is consumed by both
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`drive_emitted` (typed-emitted-crate probes) and `drive_kernel`
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(raw-kernel probes) via the parent `Cargo.toml` workspace.
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"""
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from __future__ import annotations
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import subprocess
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import sys
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from pathlib import Path
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HERE = Path(__file__).resolve().parent
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REPO_ROOT = HERE.parents[1]
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BINARY = REPO_ROOT / "protocol/mizan-codegen/target/release/mizan-generate"
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CONFIG = HERE / "mizan.toml"
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def main() -> int:
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if not BINARY.exists():
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sys.stderr.write(
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f"[regen] binary missing: {BINARY}\n"
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"[regen] build it: cargo build --release "
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"--manifest-path protocol/mizan-codegen/Cargo.toml\n"
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)
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return 1
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result = subprocess.run(
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[str(BINARY), "--config", str(CONFIG)],
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cwd=HERE,
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)
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return result.returncode
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if __name__ == "__main__":
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sys.exit(main())
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