Output cache: confirm the key covers every file the compile read, transitively
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Assessment
- Difficulty
- 4/5
- Estimated time
- 3-5 days
- Newbie friendliness
- 48/100
- Issue type
- Feature
- Clarity
- Mostly clear
- Activity status
- Active
- Tech stack
- angular, typescript, vite
- Domain
- build-system
Research direction
Start by reading the NgpCompiler cache key implementation and tracing how its metadata is built from imports and component resources. Check whether the key accounts for files reached through barrels and re-exports, then compare that behavior with the transitive file set described in the issue. Done means documenting the key’s coverage or extending it so shared cache entries account for every file the compile reads.
Written by the indexing model from the issue text.
Description
Part of #27.
Question
NgpCompiler's key is [cacheIdentity, file, code, resources, stableJson(metadata)]. Does metadata cover every file whose metadata the compile read, transitively through barrels and re-exports, and every resource of the components it imports?
Why
To share entries across projects safely, we key each app module on itself, its templateUrl/styleUrl files and every workspace file it reaches through imports, transitively (a 230-line module in our helper). If ngp's key already covers that, our key isn't needed. If not, it would be worth documenting what the key covers, or extending it.
Part of the shared-cache work in #27.
Setup: ngp 0.3.0, @angular/compiler/compiler-cli 22.3.0-next.4, Vite 8, Vitest 5.1.0 (pool: 'forks'), a Nx monorepo with 1,035 Angular projects, one Vitest config each, specs written for TestBed under JIT (Analog).
- Dominant language
- TypeScript
- Stars
- 7
- Forks
- 1
- Avg merge
- 12h 24m
- Merged PRs (30d)
- 13
Getting set up
This project ships no dev container, Dockerfile or contributing guide, so setting up is up to you: start from its README, and see our first-contribution guide for the general steps.
First steps
- Read the whole issue, then the project's contributing guide.
- Comment on the issue to say you are picking it up — it saves two people doing the same work.
- Fork the repository and make your change on a branch.
- Open a pull request that references the issue number.
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