Gabriel Radureau
7d95259667
The cancel-handler goroutine emitted a "watcher stopped" log AFTER setting the watcherStopped flag. Because viper's internal watcher goroutine (started by viper.WatchConfig) has no public Stop and can outlive the context, this log call would race with subsequent zerolog.SetGlobalLevel from the next test's LoadConfig → SetupLogging. Symptom (under go test -race ./pkg/config/...): WARNING: DATA RACE Write at zerolog.SetGlobalLevel Previous read by zerolog.(*Logger).disabled in log.Info(...) Fix: drop the informational log. The flag is sufficient — the cancel ack does not need to be observable. Test cleanups (defer cancel()) already serialize via the t.Cleanup teardown order. Verified: go test -race ./pkg/config/... passes, full BDD suite green.
dance-lessons-coach
Go web service demonstrating idiomatic package structure, versioned JSON API, and production-ready features.
Features
- Versioned JSON API (
/api/v1,/api/v2) - Chi router with graceful shutdown
- Zerolog structured logging (console and JSON modes)
- Viper configuration (file + env vars)
- Readiness endpoint for Kubernetes / service mesh
- OpenTelemetry / Jaeger distributed tracing
- OpenAPI / Swagger UI (embedded in binary)
- PostgreSQL user service with JWT auth
- BDD + unit tests
Quick Start
git clone https://gitea.arcodange.lab/arcodange/dance-lessons-coach.git
cd dance-lessons-coach
./scripts/build.sh # produces ./bin/server and ./bin/greet
./scripts/start-server.sh start
curl http://localhost:8080/api/health
curl http://localhost:8080/api/v1/greet/Alice
Stop: ./scripts/start-server.sh stop
Greet CLI
go run ./cmd/greet # Hello world!
go run ./cmd/greet Alice # Hello Alice!
Configuration
All options are available via config.yaml or DLC_* environment variables.
| Env var | Default | Description |
|---|---|---|
DLC_SERVER_PORT |
8080 |
Listening port |
DLC_SERVER_HOST |
0.0.0.0 |
Bind address |
DLC_LOGGING_JSON |
false |
JSON log format |
DLC_LOGGING_OUTPUT |
stderr | Log file path |
DLC_SHUTDOWN_TIMEOUT |
30s |
Graceful shutdown window |
DLC_API_V2_ENABLED |
false |
Enable /api/v2 routes |
DLC_CONFIG_FILE |
./config.yaml |
Override config path |
See config.example.yaml for a full template.
API
| Method | Path | Description |
|---|---|---|
| GET | /api/health |
Liveness check |
| GET | /api/ready |
Readiness check (503 during shutdown) |
| GET | /api/version |
Version info (?format=plain|full|json) |
| GET | /api/v1/greet/ |
Default greeting |
| GET | /api/v1/greet/{name} |
Named greeting |
| POST | /api/v2/greet |
V2 greeting with validation |
| GET | /swagger/ |
Swagger UI |
Testing
go test ./... # unit + integration tests
./scripts/test-graceful-shutdown.sh # lifecycle + JSON logging validation
./scripts/test-opentelemetry.sh # tracing end-to-end
Gitea Client
AI agent helper script at .vibe/skills/gitea-client/scripts/gitea-client.sh.
Auth setup:
echo "your_token" > ~/.gitea_token
chmod 600 ~/.gitea_token
export GITEA_API_TOKEN_FILE="$HOME/.gitea_token"
Get a token at https://gitea.arcodange.lab → Profile → Settings → Applications.
Architecture
Key decisions are documented in adr/. See AGENTS.md for the full development reference (commands, config, ADR index, commit conventions).
License
MIT