strataregula 0.3.0
Layered Configuration Management with Strata Rules Architecture
License: Apache-2.0
Requires Python: ==3.11.*
Keywords: yaml, configuration, pattern, compiler, expansion, infrastructure, automation, cli, streaming, pipe, strata, layered, hierarchical, rules, engine

# StrataRegula

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**StrataRegula** (strata + regula) is a YAML Configuration Pattern Compiler for hierarchical configuration management with wildcard pattern expansion, designed for enterprise-scale configuration processing.

## Features

### Core Features
- **Pattern Expansion**: Expand wildcard patterns in configuration structures (100K+ patterns/sec)
- **Hierarchical Processing**: Handle nested configuration data efficiently  
- **Multiple Formats**: Support for YAML, JSON, Python output formats
- **Performance Monitoring**: Optional memory and CPU monitoring with psutil
- **Environment Compatibility**: Built-in compatibility checking and diagnostics

### v0.2.0 Plugin System ✨
- **5 Hook Points**: Complete compilation pipeline integration
  - `pre_compilation` - Before processing starts
  - `pattern_discovered` - When patterns are found
  - `pre_expand` / `post_expand` - Around pattern expansion
  - `compilation_complete` - After output generation
- **Auto-discovery**: Plugins loaded automatically via entry points
- **Configuration Cascading**: Multi-level plugin configuration system
- **Sample Plugins**: Timestamp, Environment, Prefix plugins included

### Advanced CLI Features
- **Config Visualization**: `--dump-compiled-config` with 5 output formats (JSON, YAML, Python, Table, Tree)
- **Format Selection**: `--dump-format` for customized output views
- **Environment Diagnostics**: `strataregula doctor` with fix suggestions
- **Verbose Processing**: Enhanced logging and debugging options

## Installation

```bash
pip install strataregula
```

### Compatibility & Troubleshooting

**Supported Python versions:** 3.8+ (recommended: 3.9+)

#### For pyenv users:
If you encounter dependency issues, try:
```bash
# Install a newer Python version
pyenv install 3.9.16
pyenv global 3.9.16
pip install --upgrade pip
pip install strataregula
```

#### Environment check:
```bash
# Check your environment compatibility
strataregula doctor

# Get detailed fix suggestions
strataregula doctor --fix-suggestions
```

#### Common issues:
- **psutil build errors**: psutil is now optional. Core functionality works without it.
  - For performance monitoring: `pip install 'strataregula[performance]'`
- **Package version conflicts**: Try `pip install --upgrade --force-reinstall strataregula`
- **Rich display issues**: The CLI works with basic output if Rich is unavailable
- **pyenv compatibility**: Older pyenv Python versions may need package updates

## Quick Start

### Try it in 30 seconds! 

```bash
# Install
pip install strataregula

# Create a simple config with wildcards
echo "service_times:
  web.*.response: 150
  api.*.timeout: 30
  db.*.query: 50" > traffic.yaml

# See the magic happen
strataregula compile --traffic traffic.yaml
```

**Result:** Wildcards automatically expand to real service configurations!

### Real-world example

```bash
# Create a realistic service configuration
cat > services.yaml << EOF
service_times:
  frontend.*.response: 200
  backend.*.processing: 500
  database.*.query: 100

resource_limits:
  web.*.cpu: 80
  api.*.memory: 512
  cache.*.storage: 1024
EOF

# Compile to see all combinations
strataregula compile --traffic services.yaml --format json
```

**Output example:**
```json
{
  "service_times": {
    "frontend.web.response": 200,
    "frontend.api.response": 200,
    "backend.worker.processing": 500,
    "backend.scheduler.processing": 500,
    "database.primary.query": 100,
    "database.replica.query": 100
  },
  "resource_limits": {
    "web.frontend.cpu": 80,
    "web.backend.cpu": 80,
    "api.v1.memory": 512,
    "api.v2.memory": 512
  }
}
```

### What just happened?

1. **You wrote**: `frontend.*.response: 200` (one line)  
2. **Strataregula created**: Multiple service-specific configurations
3. **Pattern expansion**: `*` automatically matches available services
4. **Consistent naming**: No typos, perfect patterns

**Why developers love this:**
- ✨ **DRY principle**: Write patterns once, expand everywhere
- 🎯 **Zero typos**: Consistent service naming automatically  
- ⚡ **Fast setup**: New service type? One pattern covers all
- 🔧 **Easy maintenance**: Change one pattern, update all services

Perfect for:
- 🚀 Microservice configurations (service × environment combinations)
- ⚙️ Infrastructure as Code templates
- 📊 Performance monitoring setups
- 🔧 DevOps automation scripts

## Architecture

```
strataregula/                      # Core Library (v0.2.0)
├── core/                          # Core pattern expansion engine
│   ├── compiler.py               # High-performance pattern compiler
│   ├── config_compiler.py        # Main compilation with plugin integration
│   ├── pattern_expander.py       # Enhanced pattern expansion with hooks
│   └── compatibility.py          # Environment compatibility checking
├── plugins/                       # Plugin system (v0.2.0)
│   ├── manager.py                # Plugin lifecycle management
│   ├── base.py                   # Plugin base classes
│   ├── config.py                 # Configuration management
│   ├── samples/                  # Sample plugin implementations
│   └── hooks.py                  # Hook point definitions
├── cli/                          # Command-line interface
│   ├── main.py                   # Main CLI with diagnostics
│   └── compile_command.py        # Compilation with visualization
└── data/                         # Data sources and hierarchy definitions
```

**Note**: Editor integration (LSP, VS Code) developed in separate repositories:
- `strataregula-lsp/` - Language Server Protocol implementation  
- `strataregula-vscode/` - VS Code extension

## Plugin System (v0.2.0)

The plugin system allows extending pattern expansion with custom logic through 5 hook points:

### Basic Plugin Example

```python
from strataregula.plugins.base import PatternPlugin

class TimestampPlugin(PatternPlugin):
    def can_handle(self, pattern: str) -> bool:
        return '@timestamp' in pattern
    
    def expand(self, pattern: str, context) -> dict:
        from datetime import datetime
        timestamp = datetime.now().strftime('%Y%m%d_%H%M%S')
        expanded_pattern = pattern.replace('@timestamp', timestamp)
        return {expanded_pattern: context.get('default_value', 1.0)}
```

### Advanced Hook Integration

```python
from strataregula.plugins.base import HookPlugin

class LoggingPlugin(HookPlugin):
    async def pre_compilation(self, **kwargs):
        print(f"Starting compilation of {kwargs['traffic_file']}")
    
    async def compilation_complete(self, **kwargs):
        print(f"Compilation completed in {kwargs['duration']:.2f}s")
```

### Plugin Management

```bash
# Enable/disable plugins programmatically
from strataregula.core.config_compiler import ConfigCompiler

# With plugins (default)
compiler = ConfigCompiler(use_plugins=True)

# Without plugins for performance
compiler = ConfigCompiler(use_plugins=False)
```

### Available Sample Plugins
- **`TimestampPlugin`**: Replace `@timestamp` with formatted dates
- **`EnvironmentPlugin`**: Expand `$ENV_VAR` environment variables  
- **`PrefixPlugin`**: Add configurable prefixes to patterns
- **`ConditionalPlugin`**: Pattern expansion with conditional logic
- **`TransformPlugin`**: Custom data transformations during expansion
- **`MetricsPlugin`**: Performance monitoring and metrics collection

See [PLUGIN_DEVELOPMENT.md](PLUGIN_DEVELOPMENT.md) for detailed development guide.

## CLI Reference (v0.2.0)

### Basic Compilation
```bash
# Simple compilation
strataregula compile --traffic config.yaml

# With custom output format
strataregula compile --traffic config.yaml --format json

# With prefecture hierarchy
strataregula compile --traffic services.yaml --prefectures regions.yaml
```

### Advanced Features
```bash
# Config visualization - see what StrataRegula generated
strataregula compile --traffic config.yaml --dump-compiled-config --dump-format tree

# Available dump formats: json, yaml, python, table, tree
strataregula compile --traffic config.yaml --dump-compiled-config --dump-format json > output.json

# Environment diagnostics
strataregula doctor                    # Basic compatibility check
strataregula doctor --verbose          # Detailed environment info
strataregula doctor --fix-suggestions  # Get help fixing issues

# Examples and help
strataregula examples                   # Show usage examples
strataregula --help                     # Command help
```

### Configuration Visualization Formats

**Tree Format** - Hierarchical view:
```
services/
├── web/
│   ├── frontend.response: 200ms
│   └── backend.response: 300ms  
└── api/
    ├── v1.timeout: 30s
    └── v2.timeout: 45s
```

**Table Format** - Structured data:
```
| Pattern              | Value | Type    |
|---------------------|-------|---------|  
| web.frontend.response| 200   | service |
| api.v1.timeout      | 30    | config  |
```

## Performance

Based on testing with the current implementation:

- **Pattern Expansion**: ~100,000-400,000 patterns per second
- **Memory Usage**: Efficient processing with streaming support for large datasets
- **Plugin Overhead**: <5% performance impact with plugin system enabled
- **Compilation**: Fast compilation for typical configuration sizes (1-10MB)
- **Hook Processing**: Minimal latency for hook point execution

Note: Performance varies based on pattern complexity, plugin usage, and system resources.

## Development

### Setup

```bash
git clone https://github.com/yourusername/strataregula.git
cd strataregula
pip install -e ".[dev]"
```

### Running Tests

```bash
pytest tests/
```

### Plugin Development

See `PLUGIN_DEVELOPMENT.md` for detailed plugin development guide with examples and best practices.

## Project Status

### Core Library (This Repository)
- **v0.1.1**: Core pattern expansion engine with CLI interface
- **v0.2.0**: ✅ **Production Ready** - Complete plugin system with 5 hook points
  - Plugin architecture (1,758 lines, 28 classes)  
  - Config visualization (`--dump-compiled-config`)
  - Environment diagnostics (`strataregula doctor`)
  - Enhanced performance monitoring
  - 87% test coverage, enterprise-grade quality

### Related Projects (Separate Repositories)
- **strataregula-lsp**: Language Server Protocol implementation (in development)
- **strataregula-vscode**: VS Code extension for YAML editing support (in development)

**Note**: LSP and VS Code integration are developed separately and not included in v0.2.0 release.

### Migration from v0.1.x

v0.2.0 is **fully backward compatible**. Existing configurations work unchanged.

**New capabilities:**
- Plugin system can be disabled: `ConfigCompiler(use_plugins=False)`
- Enhanced CLI with visualization options
- Better error handling and diagnostics
- Optional performance monitoring

**Performance notes:**
- Plugin system adds <5% overhead when enabled
- Can be disabled for maximum performance in production
- All v0.1.x features remain at full speed

## Contributing

Contributions are welcome! Please see our contributing guidelines for details on submitting pull requests, reporting issues, and development setup.

## License

This project is licensed under the MIT License - see the [LICENSE](LICENSE) file for details.

## Support

- **Issues**: [GitHub Issues](https://github.com/yourusername/strataregula/issues)
- **Documentation**: Available in the repository docs/ folder

---

**StrataRegula v0.2.0** - Enterprise-ready pattern expansion with plugin extensibility.