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>
68 lines
2.6 KiB
Python
68 lines
2.6 KiB
Python
# AUTO-GENERATED by mizan — do not edit
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from __future__ import annotations
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from collections.abc import Callable
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from typing import Any
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# Built from frontends/mizan-rust with `maturin develop --features pyo3`.
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from mizan_rust import PyMizanClient, PyContextSubscription
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from .types import * # noqa: F401, F403
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from .types import BaseModel # re-import for the synthesized ContextData classes
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class MizanClient:
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"""Typed Python facade over the PyO3 mizan-rust kernel."""
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def __init__(self, base_url: str, *, session: bool = False,
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csrf_cookie_name: str = "csrftoken",
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csrf_header_name: str = "X-CSRFToken") -> None:
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self._inner = PyMizanClient(
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base_url,
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session=session,
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csrf_cookie_name=csrf_cookie_name,
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csrf_header_name=csrf_header_name,
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)
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def fetch_user_context(self, user_id: int) -> "UserContextData":
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raw = self._inner.fetch_context("user", {"user_id": user_id})
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return UserContextData(**raw)
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def subscribe_user_context(self, user_id: int,
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callback: Callable[[dict[str, Any]], None]) -> PyContextSubscription:
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return self._inner.subscribe_context("user", {"user_id": user_id}, callback)
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def call_echo(self, args: EchoInput) -> EchoOutput:
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raw = self._inner.call("echo", args.model_dump())
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return EchoOutput(**raw)
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def call_whoami(self) -> WhoamiOutput:
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raw = self._inner.call("whoami", {})
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return WhoamiOutput(**raw)
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def call_update_profile(self, args: UpdateProfileInput) -> UpdateProfileOutput:
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raw = self._inner.call("update_profile", args.model_dump())
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return UpdateProfileOutput(**raw)
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def call_find_user(self, args: FindUserInput) -> FindUserOutput | None:
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raw = self._inner.call("find_user", args.model_dump())
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return FindUserOutput(**raw) if raw is not None else None
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def call_rename_user(self, args: RenameUserInput) -> RenameUserOutput:
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raw = self._inner.call("rename_user", args.model_dump())
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return RenameUserOutput(**raw)
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def invalidate(self, context: str) -> None:
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self._inner.invalidate(context)
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def invalidate_scoped(self, context: str, params: dict[str, Any]) -> None:
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self._inner.invalidate_scoped(context, params)
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# ── Context data shapes (per-context bundle) ──────────────────────────────
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class UserContextData(BaseModel):
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"""Bundled return of fetch_user_context."""
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user_profile: UserProfileOutput
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user_orders: UserOrdersOutput
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