DanceLessonsCoach

A Go project demonstrating idiomatic package structure, CLI implementation, and JSON API with Chi router.

Features

• Greet function with default behavior
• Command-line interface
• JSON API with versioned endpoints
• Chi router integration
• Zerolog for high-performance logging
• Viper for configuration management
• Graceful shutdown with context
• Readiness endpoint for Kubernetes/service mesh integration
• OpenTelemetry integration with Jaeger support
• Unit tests
• Go 1.26.1 compatible

Installation

# Clone the repository
git clone https://github.com/yourusername/DanceLessonsCoach.git
cd DanceLessonsCoach

# Build and run
go run ./cmd/greet

Configuration

Basic configuration options:

# Start with default configuration
./scripts/start-server.sh start

# Custom port
export DLC_SERVER_PORT=9090
./scripts/start-server.sh start

# JSON logging
export DLC_LOGGING_JSON=true
./scripts/start-server.sh start

See AGENTS.md for comprehensive configuration guide including:

• File-based configuration
• Environment variables
• Configuration priority rules
• OpenTelemetry setup
• Advanced scenarios

Usage

CLI

# Default greeting
go run ./cmd/greet
# Output: Hello world!

# Custom greeting
go run ./cmd/greet John
# Output: Hello John!

Web Server

Using the server control script (recommended):

# Start the server
./scripts/start-server.sh start

# Test API endpoints
./scripts/start-server.sh test

# Stop the server
./scripts/start-server.sh stop

Manual server management:

# Start the server
go run ./cmd/server

# Test API endpoints
curl http://localhost:8080/api/health
# Output: {"status":"healthy"}

curl http://localhost:8080/api/ready
# Output: {"ready":true}

curl http://localhost:8080/api/v1/greet
# Output: {"message":"Hello world!"}

curl http://localhost:8080/api/v1/greet/John
# Output: {"message":"Hello John!"}

Testing

# Run all tests
go test ./...

# Run specific package tests
go test ./pkg/greet/

Project Structure

DanceLessonsCoach/
├── adr/                    # Architecture Decision Records
├── cmd/                    # Entry points (greet CLI, server)
├── pkg/                    # Core packages (config, greet, server, telemetry)
├── config.yaml             # Configuration file
├── scripts/                # Management scripts
└── go.mod                   # Go module definition

See AGENTS.md for detailed structure and component explanations.

## Architecture

This project uses Architecture Decision Records (ADRs) to document key technical choices. See [adr/](adr/) for complete documentation including decisions on Go 1.26.1, Chi router, Zerolog, OpenTelemetry, interface-based design, graceful shutdown, configuration management, and testing strategies.

**Adding new decisions?** See [adr/README.md](adr/README.md) for guidelines.

## License

MIT