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Maurice
0257e4e71e
First strangler migration (L1): /api/weather is served by a NestJS module.
- @trek/shared/weather Zod contract; Nest controller byte-identical to the legacy Express route (paths, query params, status codes, { error } bodies, lang default, ApiError/500 passthrough). Service reuses getWeather/getDetailedWeather (+ shared cache; MCP tools unchanged).
- Strangler routes /api/weather to Nest by default; the legacy Express route + its migration-time parity test were decommissioned in this PR.
- Frontend (FE2): weatherApi typed against the @trek/shared WeatherResult contract.
- Harness: reusable Nest-vs-Express parity harness, e2e harness (temp SQLite + seed/cookie helpers, real JwtAuthGuard), src/nest coverage gate raised to >=80%, src/nest test guide.
- Verified end-to-end on a prod mirror (dev1): 401/400/200 via Nest with real Open-Meteo data, Express route gone.
25 lines
1.0 KiB
TypeScript
25 lines
1.0 KiB
TypeScript
/**
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* Strangler toggle for the incremental NestJS migration.
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*
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* `getNestPrefixes()` returns the request path prefixes that NestJS handles;
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* every other path falls through to the legacy Express app. The default is the
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* set of prefixes whose Nest modules exist. Operators can override it at runtime
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* via the `NEST_PREFIXES` env var (comma-separated) for instant Nest<->Express
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* rollback — no redeploy, no code change. Setting `NEST_PREFIXES=` (empty) routes
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* everything back to the legacy app.
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*/
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const DEFAULT_NEST_PREFIXES = ['/api/_nest', '/api/weather'];
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export function getNestPrefixes(): string[] {
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const raw = process.env.NEST_PREFIXES;
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if (raw !== undefined) {
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return raw.split(',').map((s) => s.trim()).filter(Boolean);
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}
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return DEFAULT_NEST_PREFIXES;
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}
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/** Builds a matcher: true when `path` belongs to one of the migrated prefixes. */
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export function makeNestPathMatcher(prefixes: string[]): (path: string) => boolean {
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return (path) => prefixes.some((prefix) => path === prefix || path.startsWith(prefix + '/'));
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}
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