env-loader-pro 1.0.1

A typed, validated, and secure environment loader for Python projects with automatic type casting, validation, secret masking, and schema support.

env-loader-pro

Enterprise-grade typed, validated, and secure environment variable loader for Python with automatic type casting, validation, secret masking, cloud secrets integration, and full observability.

🎯 What Problem Does This Solve?

Traditional .env loaders are basic and unsafe. env-loader-pro provides:

• Type safety - Automatic casting to int, bool, list, etc.
• Cloud secrets - Azure Key Vault, AWS Secrets Manager integration
• Audit trail - Complete provenance tracking for compliance
• Policy enforcement - Policy-as-code for configuration governance
• CI/CD safe - All commands work without cloud credentials
• Secret security - Automatic masking, never logs secrets

🚀 Key Features

• ✅ Load from .env + system env with deterministic precedence
• ✅ Automatic type casting (int, bool, list, JSON)
• ✅ Required/optional validation with helpful errors
• ✅ Default values support
• ✅ Secret masking for safe printing/logging
• ✅ Environment variable expansion (${VAR} syntax)
• ✅ Multiple environment support (.env.dev, .env.prod, etc.)
• ✅ Cloud secrets - Azure Key Vault, AWS Secrets Manager
• ✅ Audit trail - Full provenance tracking
• ✅ Failure policies - Per-provider error handling
• ✅ Policy-as-code - JSON/YAML policy enforcement
• ✅ Configuration diff - Drift detection
• ✅ Schema support (Pydantic models & dataclasses)
• ✅ CLI tool for common operations
• ✅ CI/CD safe - No cloud access required

📦 Installation

pip install env-loader-pro

Optional Dependencies

# For Pydantic schema support
pip install env-loader-pro[pydantic]

# For Azure Key Vault
pip install env-loader-pro[azure]

# For AWS Secrets Manager
pip install env-loader-pro[aws]

# For YAML export
pip install env-loader-pro[yaml]

# For everything
pip install env-loader-pro[all]

🎯 Quickstart

Basic Usage

from env_loader_pro import load_env

config = load_env(
    required=["API_KEY"],
    types={"PORT": int, "DEBUG": bool},
    defaults={"PORT": 8080}
)

print(config["PORT"])  # 8080 (int)
print(config["DEBUG"])  # True (bool)

With Cloud Secrets (Azure)

from env_loader_pro import load_env
from env_loader_pro.providers import AzureKeyVaultProvider

provider = AzureKeyVaultProvider(
    vault_url="https://myvault.vault.azure.net"
)

config = load_env(
    env="prod",
    providers=[provider],
    audit=True  # Track provenance
)

# Get audit trail
config, audit = load_env(audit=True)
print(audit.to_json())

With Cloud Secrets (AWS)

from env_loader_pro import load_env
from env_loader_pro.providers import AWSSecretsManagerProvider

provider = AWSSecretsManagerProvider(
    secret_id="myapp/prod",
    region="us-east-1"
)

config = load_env(
    env="prod",
    providers=[provider],
    failure_policy={"aws": "fallback"}  # Graceful degradation
)

With Policy-as-Code

from env_loader_pro import load_env

# policy.yaml:
# require:
#   - API_KEY
#   - DB_PASSWORD
# forbid:
#   - DEBUG

config = load_env(
    env="prod",
    policy="policy.yaml"  # Enforces requirements
)

Schema Support

from env_loader_pro import load_with_schema
from pydantic import BaseModel

class Config(BaseModel):
    port: int = 8080
    debug: bool = False
    api_key: str  # Required

config = load_with_schema(Config, env="prod")
print(config.port)  # Typed access

🛠️ CLI Tool

# Show environment variables
envloader show --env prod

# Validate (CI-safe, no cloud access)
envloader validate --ci --required API_KEY PORT

# Audit trail
envloader audit --json

# Explain precedence
envloader explain

# Configuration diff
envloader diff --ci --deny-secret-changes

# Export to JSON/YAML
envloader export --output config.json --format json

# Generate .env.example
envloader generate-example --required API_KEY PORT

🔒 Security Features

• Automatic secret masking - Keys containing secret, key, token, password, pwd are masked
• Audit trail - Complete provenance tracking (source, provider, timestamp)
• Policy enforcement - Require/forbid variables via policy files
• Secret change detection - Prevent accidental exposure
• Encrypted .env - Support for age/GPG encrypted files
• Never logs secrets - All outputs are safe

📊 Configuration Precedence

Deterministic priority order (highest to lowest):

1. Cloud providers (Azure Key Vault, AWS Secrets Manager)
2. System environment variables
3. Docker/K8s mounted secrets
4. .env.{env} (environment-specific)
5. Base .env file
6. Schema defaults

See envloader explain for detailed documentation.

📚 Documentation

• Architecture Guide - Technical design and internals
• Security Model - Security guarantees and secret handling
• Contributing - How to contribute

🧪 Testing

pip install -e ".[test]"
pytest tests/

📝 License

Apache License 2.0 - See LICENSE file for details.

🤝 Contributing

Contributions welcome! See CONTRIBUTING.md for guidelines.