hetman-kit-env 0.2.0

Hetman Kit Environment is a developer-centric environment variable manager. It leverages the Hetman Pipeline engine to treat environment variables not just as strings, but as strictly validated and transformed data structures.

Hetman Kit Environment is a developer-centric environment variable manager. It leverages the Hetman Pipeline engine to treat environment variables not just as strings, but as strictly validated and transformed data structures.

Installation

pip install hetman-kit-env

Why use this?

Standard os.environ.get returns strings and provides no validation. Hetman Kit Environment allows you to:

1. Validate length, patterns, and types immediately.
2. Transform values (lowercase, strip, cast) during retrieval.
3. Parse JSON structures stored in environment strings automatically.
4. Enforce existence for missing variables.

Usage Example

from hetman_kit_env import EnvironmentVariable
from pipeline import Condition, Match, Transform

# Set the path for your .env file
EnvironmentVariable.dotenv_path = ".env"

# Define a validated environment variable
# This will raise an exception if the key is missing or validation fails
SECRET_KEY = EnvironmentVariable[str](
    name="SECRET_KEY",
    type=str,
    conditions={
        Condition.ExactLength: 32
    },
    matches={
        Match.Text.Letters: None
    },
    transform={
        Transform.Lowercase: None
    }
)

# Access the processed value
print(SECRET_KEY.get)

Pythonic Access Patterns

You don't have to manually call .get every time. The EnvironmentVariable instance implements magic methods to make your code cleaner:

• Direct Comparison: Use == to compare the variable directly with a value.

  if SECRET_KEY == "expected_hash_value":
      ...
  

• Boolean Logic: Use it directly in if statements to check if the value is truthy.

  DEBUG_MODE = EnvironmentVariable[bool](name="DEBUG", optional=True)
  
  if DEBUG_MODE:
      print("Debug is enabled")
  

• String Conversion: Use it directly in f-strings or print().

  print(f"API_URL: {API_URL}")
  

• Callable shorthand: Call the object like a function to get the value.

  current_key = SECRET_KEY()
  

Core Features

• Strict Typing: Use Python generics EnvironmentVariable[T] for better IDE support and type safety.
• JSON Ready: Built-in json.loads support for complex environment configurations.
• Pipeline Integration: Full access to the Pipeline execution flow (Type Check -> Setup -> Conditions -> Matches -> Transformations).
• Singleton .env Loading: The .env file is loaded once and shared across all instances.

Documentation

This package uses the Hetman Pipeline logic for its core processing. To learn more about available conditions, matches, and transformations, visit Official Documentation