runenv 0.2.1

Wrapper to run programs with different env

Wrapper to run programs with modified environment variables loaded from given file. You can use runenv to manage your app settings using 12-factor principles.

You can use same environment file with runenv and with docker using env-file parameter

• Free software: BSD license

• Documentation: https://runenv.readthedocs.org.

Installation

In order to install use pip:

$ pip install -U runenv

Usage

Run from shell:

$ runenv env.development ./manage.py runserver

example env.development file:

BASE_URL=http://127.0.0.1:8000
DATABASE_URI=postgres://postgres:password@localhost/dbname
SECRET_KEY=y7W8pbRcuPuAmgTHsJtEpKocb7XPcV0u

# email settings
EMAIL_HOST=smtp.mandrillapp.com
EMAIL_PORT=587
EMAIL_HOST_USER=someuser
EMAIL_HOST_PASSWORD=hardpassword
EMAIL_FROM=[e-mail]
EMAIL_USE_TLS=1

Python API

load_env(env_file=’.env’, prefix=None, strip_prefix=True, force=False)

Loads environment from given env_file`, default .env.

If prefix provided only variables started with given prefix will be loaded to environment with keys truncated from prefix. To preserver prefix, pass strip_prefix=False.

Example:

$ echo 'DJANGO_SECRET_KEY=bzemAG0xfdMgFrHBT3tJBbiYIoY6EeAj' > .env

$ python
>>> import os
>>> from runenv import load_env
>>> load_env(prefix='DJANGO_')
>>> 'DJANGO_SECRET_KEY' in os.environ
False
>>> 'SECRET_KEY' in os.environ
True
>>> load_env(prefix='DJANGO_', strip_prefix=False)
>>> 'DJANGO_SECRET_KEY' in os.environ
True

Notice: Environment will not be loaded if command was fired by runenv wrapper until you use force=True parameter

Wrapper runenv sets _RUNENV_WRAPPED=1 variable and load_env does not load variables then.

Example:

$ echo 'DJANGO_SECRET_KEY=bzemAG0xfdMgFrHBT3tJBbiYIoY6EeAj' > .env

$ python
>>> import os
>>> from runenv import load_env
>>> os.environ['_RUNENV_WRAPPED'] = '1'
>>> load_env()
>>> 'DJANGO_SECRET_KEY' in os.environ
False
>>> load_env(force=True)
>>> 'DJANGO_SECRET_KEY' in os.environ
True

Django integration

To use load_env with Django, put in manage.py and wsgi.py code:

from runenv import load_env
load_env()

Similar projects

• https://github.com/jezdez/envdir - runs another program with a modified environment according to files in a specified directory

• https://github.com/theskumar/python-dotenv - Reads the key,value pair from .env and adds them to environment variable

History

0.2.1 (2015-06-16)

• add strip_prefix option to load_env

0.2.0 (2015-06-16)

• add load_env (python api)

0.1.4 (2015-06-15)

• Check if file to run exists and is executable

0.1.3 (2015-06-01)

• Support for env file comments by ‘#’

0.1.2 (2015-06-01)

• Return code from runned command

0.1.1 (2015-05-31)

• First release on PyPI.