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Partial mode: NgModule-declared components get no dependencies, so their directives never match

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評估

難度
5/5
預估耗時
一週以上
新手友好度
35/100
Issue 類型
缺陷
描述清晰度
基本清楚
活躍度
活躍
技術堆疊
angular, rust, typescript
領域
compilers

研究方向

Start by comparing partial and full component compilation in the compiler entry points, then trace how NgModule scope information reaches ɵɵngDeclareComponent and how the Angular linker handles its dependencies. The issue identifies no files or tests; use the reproduction with DepModule and App as the starting case. Done means linked partial output includes the NgModule-scoped directive so D matches in App's template, with an approach compatible with the linker.

由索引模型根據 Issue 內容生成。

描述

Summary

In partial compilation, a component declared in an NgModule (standalone: false) gets no dependencies in ɵɵngDeclareComponent. After linking, App.ɵcmp.directiveDefs is null, so no directive from the NgModule scope matches in its template. Full mode works, because there dependencies is ɵɵgetComponentDepsFactory(App), which is resolved at runtime.

Found while re-checking #623.

Reproduction

// dep.ts
@Directive({selector: '[d]', standalone: false}) export class D {}
@NgModule({declarations: [D], exports: [D]}) export class DepModule {}

// main.ts
import {DepModule} from './dep';
@Component({selector: 'app', template: '<div d></div>', standalone: false}) export class App {}
@NgModule({declarations: [App], imports: [DepModule]}) export class AModule {}

Compiled with compilationMode: 'partial', linked with linkAngularPackageSync, and run with @angular/core 22.2:

App.ɵcmp.directiveDefs
oxc full [D, App]
oxc partial + link null, so D never matches
ngtsc partial dependencies: [{kind: "directive", type: i1.D, selector: "[d]"}]

Notes

ngtsc builds this list from the NgModule scope, which comes from the whole program. One way to do it one file at a time is to emit something in partial mode that resolves at runtime, as full mode does with ɵɵgetComponentDepsFactory. Angular's linker would also have to accept that output, so this needs a design decision.

主要語言
Rust
星號
244
分支
26
平均合併
23 小時 41 分鐘
30 天內合併 PR
106

環境準備

這個專案沒有提供開發容器、Dockerfile 或貢獻指南,環境需要你自己搭建:先看它的 README,通用步驟見我們的新手貢獻指南。

從這裡開始

  1. 先讀完整個 Issue,再讀專案的貢獻指南。
  2. 在 Issue 下留言說明你要接手 —— 這能避免兩個人做同樣的事。
  3. Fork 儲存庫,在一個分支上完成修改。
  4. 送出 Pull Request,並在描述裡引用這個 Issue 編號。

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