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[PR #6423] fix(mdns): use named import for bonjour-service (resolves #6422) #11898

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opened 2026-02-16 18:16:50 -05:00 by yindo · 0 comments
yindo commented 2026-02-16 18:16:50 -05:00
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Original Pull Request: https://github.com/anomalyco/opencode/pull/6423

State: closed
Merged: Yes

Fixes #6422

Problem

opencode web --mdns fails to initialize mDNS service in bundled binaries. The server displays "mDNS: opencode.local" but no UDP socket is bound and the service is not discoverable.

From logs (~/.local/share/opencode/log/*.log):

ERROR service=mdns error=Object is not a constructor (evaluating 'new import_bonjour_service.default') mDNS publish failed

Root Cause

The bonjour-service library is a CommonJS module that exports both:

  • exports.default = Bonjour
  • exports.Bonjour = Bonjour

When using import Bonjour from "bonjour-service" (default import), Bun's bundler (Bun.build({ compile: {...} })) has issues with the ESM/CJS interop. The bundled code attempts new Bonjour() but the constructor is not properly resolved.

This only affects the compiled binary - bun dev works fine because it doesn't go through the same bundling process.

Solution

Use the named export instead of the default export:

// Before (broken in bundled binary)
import Bonjour from "bonjour-service"

// After (works in both dev and bundled binary)
import { Bonjour } from "bonjour-service"

Verification

  • ✅ bun run typecheck passes
  • ✅ bun test - all 366 tests pass
  • ✅ Dev build (bun dev web --mdns) works
  • ✅ Bundled binary (./script/build.ts --single) works
  • ✅ UDP 5353 socket is bound by opencode process
  • ✅ mDNS resolution works from Windows host (WSL2 mirrored networking)
**Original Pull Request:** https://github.com/anomalyco/opencode/pull/6423 **State:** closed **Merged:** Yes --- Fixes #6422 ## Problem `opencode web --mdns` fails to initialize mDNS service in bundled binaries. The server displays "mDNS: opencode.local" but no UDP socket is bound and the service is not discoverable. From logs (`~/.local/share/opencode/log/*.log`): ``` ERROR service=mdns error=Object is not a constructor (evaluating 'new import_bonjour_service.default') mDNS publish failed ``` ## Root Cause The `bonjour-service` library is a CommonJS module that exports both: - `exports.default = Bonjour` - `exports.Bonjour = Bonjour` When using `import Bonjour from "bonjour-service"` (default import), Bun's bundler (`Bun.build({ compile: {...} })`) has issues with the ESM/CJS interop. The bundled code attempts `new Bonjour()` but the constructor is not properly resolved. This only affects the compiled binary - `bun dev` works fine because it doesn't go through the same bundling process. ## Solution Use the named export instead of the default export: ```typescript // Before (broken in bundled binary) import Bonjour from "bonjour-service" // After (works in both dev and bundled binary) import { Bonjour } from "bonjour-service" ``` ## Verification - ✅ `bun run typecheck` passes - ✅ `bun test` - all 366 tests pass - ✅ Dev build (`bun dev web --mdns`) works - ✅ Bundled binary (`./script/build.ts --single`) works - ✅ UDP 5353 socket is bound by opencode process - ✅ mDNS resolution works from Windows host (WSL2 mirrored networking)
yindo added the pull-request label 2026-02-16 18:16:50 -05:00
yindo closed this issue 2026-02-16 18:16:50 -05:00
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Reference: anomalyco/opencode#11898
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