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>
75 lines
2.4 KiB
Rust
75 lines
2.4 KiB
Rust
//! Drive the mizan-rust kernel against a live FastAPI fixture app and
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//! print every response. Used by `run_wire_parity.sh` which:
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//!
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//! 1. Boots `tests/afi/fastapi_app.py` via uvicorn on port 8765.
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//! 2. Polls `/openapi.json` until the server is up.
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//! 3. Runs `cargo run --bin drive_kernel -- http://127.0.0.1:8765/api/mizan`.
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//! 4. Diffs the stdout against a committed snapshot.
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//!
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//! The kernel exercises every endpoint the fixture declares: the two
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//! plain functions (`echo`, `whoami`), the two-function `user` context,
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//! the `update_profile` mutation, the `find_user` Optional path, and
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//! the `rename_user` merge mutation.
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use std::env;
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use std::process::ExitCode;
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use mizan_rust::{MizanClient, MizanConfig};
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use serde_json::{json, Value};
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#[tokio::main]
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async fn main() -> ExitCode {
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let base_url = env::args().nth(1)
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.unwrap_or_else(|| "http://127.0.0.1:8765/api/mizan".to_string());
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let client = MizanClient::new(MizanConfig {
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base_url,
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session: false,
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..Default::default()
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});
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let mut failures = 0usize;
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failures += probe(&client, "echo", json!({"text": "hello"})).await;
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failures += probe(&client, "whoami", json!({})).await;
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failures += probe(&client, "find_user", json!({"user_id": 99999})).await;
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failures += probe(&client, "update_profile", json!({"user_id": 5, "name": "Ryth"})).await;
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failures += probe(&client, "rename_user", json!({"user_id": 5, "name": "RythR"})).await;
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failures += probe_context(&client, "user", json!({"user_id": 5})).await;
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if failures > 0 {
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eprintln!("[drive_kernel] {failures} probe(s) failed");
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ExitCode::FAILURE
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} else {
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ExitCode::SUCCESS
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}
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}
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async fn probe(client: &MizanClient, fn_name: &str, args: Value) -> usize {
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match client.call(fn_name, args.clone()).await {
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Ok(result) => {
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println!("call {fn_name} args={args} -> {result}");
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0
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}
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Err(err) => {
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eprintln!("call {fn_name} args={args} -> ERR {err}");
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1
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}
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}
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}
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async fn probe_context(client: &MizanClient, name: &str, params: Value) -> usize {
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match client.fetch_context(name, ¶ms).await {
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Ok(data) => {
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println!("ctx {name} params={params} -> {data}");
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0
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}
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Err(err) => {
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eprintln!("ctx {name} params={params} -> ERR {err}");
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1
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}
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}
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}
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