A helping hand to manage your settings among different environments
Intro
Managing application configuration that runs on multiple environments can be tough. So milieu comes to help you pretend you have only one settings file that magically works whenever you deploy.
Production
The system environment is the first place milieu will try to find things. So, when the application runs inside of an environment with the right variables set, it will just work.
So, if you know you have the environment variable DATABASE_URI
like this:
$ export DATABASE_URI=mysql://root@localhost:3306/mydb
The application settings glue code will look like this:
>>> from milieu import Environment
>>> env = Environment()
>>> dburi = env.get_uri('DATABASE_URI')
>>> dburi.host
u'localhost'
>>> dburi.port
3306
Local
If you just want to load things from a file locally, the
Environment.from_file()
constructor will help you out.
>>> from milieu import Environment
>>> env = Environment.from_file('/etc/app.cfg')
>>> env.get_bool('BOOL_FLAG')
True
>>> env.get_float('FLOAT_VAL')
3.14
The file app.cfg
will look like this:
BOOL_FLAG: True
FLOAT_VAL: 3.14
From a folder
You can also load variables from a folder, where each file will be an environment variable and the file's content will be the value. Just like envdir.
Now, say that you have the folder /etc/envdir/app
and this folder
contains the file MYSQL_CONN_URI
with a database URL inside of
it. Just like this one here:
mysql://root:secret@localhost:3306/mydb
.
To read that directory and load the variable properly, you just have to do the following:
>>> from milieu import Environment
>>> env = Environment.from_folder('/etc/envdir/app')
>>> uri = env.get_uri('MYSQL_CONN_URI')
>>> uri.host
'localhost'
>>> uri.port
3306
>>> uri.user
'root'
>>> uri.password
'secret'
Hacking on it
Install dev dependencies
pip install -r requirements-dev.txt
Run tests
make test
Change it
Make sure you write tests for your new features and keep the test coverage in 100%
Release it
After you already made your commits, run:
make release
follow the instructions and do the harlem shake