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>
108 lines
3.0 KiB
Rust
108 lines
3.0 KiB
Rust
//! Vue target — composable per context + composable per call.
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//! Output shape lives at `templates/vue/vue.ts.j2`.
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use std::path::PathBuf;
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use askama::Template;
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use crate::config::Config;
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use crate::emit::CodegenTarget;
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use crate::emit::EmittedFile;
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use crate::emit::casing::pascal_case;
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use crate::ir::{IsContext, MizanFunction, MizanIR};
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pub struct VueAdapter;
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impl CodegenTarget for VueAdapter {
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fn name(&self) -> &'static str { "vue" }
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fn emit(&self, ir: &MizanIR, _config: &Config) -> Vec<EmittedFile> {
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let content = build_template(ir).render().expect("vue template renders");
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vec![EmittedFile::new(PathBuf::from("vue.ts"), content)]
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}
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}
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#[derive(Template)]
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#[template(path = "vue/vue.ts.j2", escape = "none")]
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struct VueTemplate<'a> {
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stage1_imports: Vec<String>,
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contexts: Vec<CtxRender<'a>>,
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calls: Vec<CallRender>,
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}
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struct CtxRender<'a> {
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pascal: String,
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name: &'a str,
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has_params: bool,
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params_arg: &'static str,
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fns: Vec<FnRender<'a>>,
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}
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struct FnRender<'a> {
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camel_name: &'a str,
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name: &'a str,
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output_type: &'a str,
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}
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struct CallRender {
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pascal: String,
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has_input: bool,
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}
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fn build_template(ir: &MizanIR) -> VueTemplate<'_> {
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let contexts: Vec<CtxRender> = ir.contexts.iter()
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.map(|(ctx_name, ctx_meta)| {
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let has_params = !ctx_meta.params.is_empty();
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let ctx_fns: Vec<FnRender> = ir.functions.iter()
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.filter(|f| f.is_context.as_str() == Some(ctx_name.as_str()))
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.map(|f| FnRender {
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camel_name: &f.camel_name,
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name: &f.name,
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output_type: &f.output_type,
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})
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.collect();
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CtxRender {
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pascal: pascal_case(ctx_name),
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name: ctx_name,
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has_params,
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params_arg: if has_params { "params" } else { "{} as any" },
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fns: ctx_fns,
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}
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})
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.collect();
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let mutations: Vec<&MizanFunction> = ir.functions.iter()
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.filter(|f| matches!(f.is_context, IsContext::No) && !f.is_form && !f.affects.is_empty())
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.collect();
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let plain_fns: Vec<&MizanFunction> = ir.functions.iter()
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.filter(|f| matches!(f.is_context, IsContext::No) && !f.is_form && f.affects.is_empty())
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.collect();
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let calls: Vec<CallRender> = mutations.iter().chain(plain_fns.iter())
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.map(|f| CallRender {
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pascal: pascal_case(&f.camel_name),
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has_input: f.has_input,
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})
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.collect();
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let mut stage1: Vec<String> = Vec::new();
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for ctx_name in ir.contexts.keys() {
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let p = pascal_case(ctx_name);
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stage1.push(format!("fetch{p}Context"));
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stage1.push(format!("type {p}ContextData"));
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stage1.push(format!("type {p}ContextParams"));
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}
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for fn_meta in mutations.iter().chain(plain_fns.iter()) {
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stage1.push(format!("call{}", pascal_case(&fn_meta.camel_name)));
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}
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VueTemplate { stage1_imports: stage1, contexts, calls }
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}
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