🚀 envvar-validator

The most comprehensive, production-ready environment variable validation library for Python

The definitive solution for Python environment variable validation that developers choose because it's genuinely the best tool available.

📦 Installation

pip install envvar-validator

View on PyPI

🌟 Why envvar-validator?

envvar-validator is the most comprehensive, feature-rich environment variable validation library for Python. Built with production-ready features, security-first design, and exceptional developer experience, it's the tool that will revolutionize how you manage environment variables.

✨ Key Features

• 🔒 Advanced Security: Secret scanning, compliance validation, encryption key verification
• 🚀 Framework Integration: Seamless Django, Flask, FastAPI support
• 📊 Monitoring & Observability: Health checks, drift detection, performance metrics
• 🛠️ Developer Tools: CLI, interactive setup, codebase scanning
• 🏗️ Team Collaboration: Shared templates, audit logging, change notifications
• 🔧 Extensible Architecture: Plugin system, custom validators, middleware support
• 📱 Cross-Platform: Windows, macOS, Linux support
• 🎯 Zero Configuration: Works out of the box with sensible defaults

🚀 Quick Start

Installation

from env_validator import EnvironmentValidator, ValidationError

# Define your environment schema
validator = EnvironmentValidator({
    "DATABASE_URL": {
        "type": "str",
        "required": True,
        "validators": ["database_url"]
    },
    "API_KEY": {
        "type": "str", 
        "required": True,
        "validators": ["api_key"],
        "sensitive": True
    },
    "DEBUG": {
        "type": "bool",
        "default": False
    },
    "PORT": {
        "type": "int",
        "default": 8000,
        "validators": ["port_range"]
    }
})

# Validate your environment
try:
    config = validator.validate()
    print(f"✅ Environment validated successfully!")
    print(f"Database: {config.DATABASE_URL}")
    print(f"Debug mode: {config.DEBUG}")
except ValidationError as e:
    print(f"❌ Environment validation failed: {e}")

Framework Integration

Django

# settings.py
from env_validator import DjangoEnvironmentValidator

env = DjangoEnvironmentValidator({
    "SECRET_KEY": {"type": "str", "required": True, "validators": ["secret_key"]},
    "DATABASE_URL": {"type": "str", "required": True, "validators": ["database_url"]},
    "DEBUG": {"type": "bool", "default": False},
    "ALLOWED_HOSTS": {"type": "list", "default": ["localhost"]},
})

# Validate and load environment
config = env.validate()

SECRET_KEY = config.SECRET_KEY
DATABASES = {
    'default': env.parse_database_url(config.DATABASE_URL)
}
DEBUG = config.DEBUG
ALLOWED_HOSTS = config.ALLOWED_HOSTS

FastAPI

# config.py
from env_validator import FastAPIEnvironmentValidator
from pydantic import BaseSettings

class Settings(BaseSettings):
    env_validator = FastAPIEnvironmentValidator({
        "DATABASE_URL": {"type": "str", "required": True},
        "API_KEY": {"type": "str", "required": True, "sensitive": True},
        "ENVIRONMENT": {"type": "str", "default": "development"},
    })
    
    def __init__(self, **kwargs):
        super().__init__(**kwargs)
        self.env_validator.validate()

settings = Settings()

🛠️ CLI Tools

Environment Validation

# Validate current environment
envvar-validator validate

# Validate with custom schema file
envvar-validator validate --schema schema.yaml

# Generate environment report
envvar-validator report --output html

Interactive Setup

# Interactive environment setup wizard
envvar-validator setup

# Generate configuration templates
envvar-validator template --framework django

Security Scanning

# Scan for secrets and sensitive data
envvar-validator scan --secrets

# Compliance check
envvar-validator scan --compliance gdpr

🔧 Advanced Features

Custom Validators

from env_validator import BaseValidator, ValidationError

class CustomAPIValidator(BaseValidator):
    def validate(self, value: str) -> str:
        if not value.startswith("api_"):
            raise ValidationError("API key must start with 'api_'")
        return value

validator = EnvironmentValidator({
    "API_KEY": {
        "type": "str",
        "validators": [CustomAPIValidator()]
    }
})

Environment-Specific Configurations

validator = EnvironmentValidator({
    "DATABASE_URL": {
        "type": "str",
        "required": True,
        "environments": {
            "development": "sqlite:///dev.db",
            "staging": {"type": "str", "validators": ["database_url"]},
            "production": {"type": "str", "validators": ["database_url", "ssl_required"]}
        }
    }
})

Monitoring Integration

from env_validator import MonitoringValidator

# Health check endpoint
@app.get("/health/env")
async def environment_health():
    return MonitoringValidator.health_check()

# Metrics endpoint
@app.get("/metrics/env")
async def environment_metrics():
    return MonitoringValidator.get_metrics()

📊 Built-in Validators

Security Validators

• secret_key: Validates secret key strength and entropy
• api_key: Validates API key format and security
• encryption_key: Validates encryption key requirements
• password_strength: Checks password complexity requirements

Network Validators

• url: Validates URL format and accessibility
• ip_address: Validates IPv4/IPv6 addresses
• port_range: Validates port numbers
• database_url: Validates database connection strings

Data Validators

• email: RFC-compliant email validation
• json: JSON format validation
• file_path: File path existence and permissions
• directory_path: Directory existence and permissions

Cloud Validators

• aws_arn: AWS ARN format validation
• gcp_project_id: Google Cloud project ID validation
• azure_resource_id: Azure resource identifier validation

🔒 Security Features

Secret Detection

validator = EnvironmentValidator({
    "API_KEY": {
        "type": "str",
        "sensitive": True,
        "validators": ["secret_scanning"]
    }
})

# Automatically detects and protects sensitive values
config = validator.validate()
print(config.API_KEY)  # Shows: "***REDACTED***"

Compliance Validation

validator = EnvironmentValidator({
    "PII_DATA": {
        "type": "str",
        "compliance": ["gdpr", "hipaa"],
        "encryption": "required"
    }
})

📈 Monitoring & Observability

Health Checks

from env_validator import HealthChecker

# Check environment health
health = HealthChecker.check()
if not health.is_healthy:
    print(f"Environment issues: {health.issues}")

Drift Detection

from env_validator import DriftDetector

# Detect configuration drift
drift = DriftDetector.detect()
if drift.has_changes:
    print(f"Configuration drift detected: {drift.changes}")

🏗️ Framework Integrations

Django

# settings.py
from env_validator.django import DjangoEnvironmentValidator

env = DjangoEnvironmentValidator.from_settings_file()
config = env.validate()

# Automatic Django settings integration
SECRET_KEY = config.SECRET_KEY
DATABASES = config.DATABASES

Flask

# app.py
from env_validator.flask import FlaskEnvironmentValidator

app = Flask(__name__)
env = FlaskEnvironmentValidator(app, {
    "SECRET_KEY": {"type": "str", "required": True},
    "DATABASE_URL": {"type": "str", "required": True},
})

FastAPI

# main.py
from env_validator.fastapi import FastAPIEnvironmentValidator

app = FastAPI()
env = FastAPIEnvironmentValidator(app, {
    "API_KEY": {"type": "str", "required": True},
    "DATABASE_URL": {"type": "str", "required": True},
})

🚀 Performance Features

• Lazy Loading: Validators load only when needed
• Caching: Repeated validations are cached
• Async Support: Non-blocking validation operations
• Memory Efficient: Minimal memory footprint

📚 Documentation

• 📖 Full Documentation
• 🚀 Quick Start Guide
• 🔧 API Reference
• 🏗️ Framework Integrations
• 🔒 Security Guide

🤝 Contributing

We welcome contributions! Please see our Contributing Guide for details.

Development Setup

git clone https://github.com/Sherin-SEF-AI/envvar-validator.git
cd envvar-validator
pip install -e ".[dev]"
pre-commit install
pytest

📄 License

This project is licensed under the MIT License - see the LICENSE file for details.

🙏 Acknowledgments

• Built with ❤️ by the Python community
• Inspired by the need for better environment variable management
• Thanks to all contributors and users

📊 Project Status

• ✅ Core validation engine
• ✅ Advanced validators library
• ✅ Framework integrations
• ✅ CLI tools
• ✅ Security features
• ✅ Monitoring & observability
• ✅ Documentation
• ✅ Testing suite
• 🚧 Community features
• 🚧 Performance optimizations

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Made with ❤️ by Sherin Joseph Roy

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