fix(dev-emulators): read class-shaped Prisma Dev registry - #246
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WalkthroughThe change adds shared utilities for Prisma Dev registry scanning and URL port parsing. Merge Risk: 🔵 Low · up to The change is mergeable with owner awareness: the registry lookup and port collection are covered by passing verification, but the regression test does not explicitly prove that the production adapter supplies the required scan options, so that integration check should be followed up. 🚥 Pre-merge checks | ✅ 4 | ❌ 1❌ Failed checks (1 warning)
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Inline comments:
In
`@packages/1-prisma-cloud/0-lowering/dev-emulators/src/__tests__/prisma-dev-registry.test.ts`:
- Around line 5-25: Update the regression test around ServerState.scan to
capture its received argument and assert it equals exactly { onlyMetadata: true
}, while preserving the existing claimed-port assertions.
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packages/1-prisma-cloud/0-lowering/dev-emulators/src/__tests__/prisma-dev-registry.test.tspackages/1-prisma-cloud/0-lowering/dev-emulators/src/postgres-main.tspackages/1-prisma-cloud/0-lowering/dev-emulators/src/prisma-dev-registry.ts
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Signed-off-by: Aman Varshney <amanvarshney.work@gmail.com>
Signed-off-by: Aman Varshney <amanvarshney.work@gmail.com>
…lusion, scan per attempt Review follow-ups on the class-shaped registry fix: - Skip the record named for the requesting instance: @prisma/dev exempts a server's own record from port validation and prefers to reuse its ports, so excluding them moved a persisted database off its recorded port whenever the daemon's own state was lost while the record survived. - Scan inside the serialized section, once per attempt, so retries see the claims a sibling's queued start just recorded instead of a stale snapshot. - Log the two silent-degradation paths (no usable ServerState.scan; scan failure) to the daemon's stdio log — an unread registry was previously indistinguishable from an empty one, which is how the original guard bug shipped undetected. - Type the parameter as RegistryScanHost instead of unknown. - Share portOfUrl and isStringKeyedRecord from prisma-dev-registry.ts instead of keeping byte-identical copies in postgres-main.ts. - Drop the top-level streamsPort key: no real record carries it (serverDumpV1Schema has three port fields; the streams port lives only in experimental.streams.serverUrl), and the test no longer fabricates it. - Cover the guard-reject branch and the own-record exemption in tests. Signed-off-by: willbot <w.a.madden+machine@gmail.com> Signed-off-by: Will Madden <madden@prisma.io>
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Summary
ServerState.scan()when Prisma Dev exposesServerStateas a class constructorProblem
@prisma/dev/internal/stateexportsServerStateas a class (typeof ServerState === "function"). Composer guarded it withisStringKeyedRecord, which only accepts values whose type isobject, soregistryClaimedPorts()always skipped the scan.That allowed the local Postgres emulator to select ports claimed by stopped Prisma Dev records. Prisma Dev then refused the start after acquiring the new server name, producing the observed sequence:
Port number ... belongs to another Prisma Dev serverA Prisma Dev server with the name ... is already runningThe second error is fallout from the first refused start leaking the name lock. Avoiding the claimed port prevents that cascade.
Verification
pnpm exec biome checkon the changed files@internal/dev-emulatorsbuild and typecheck@internal/dev-emulatorssuite: 65 passed, 0 failed