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Dotconf

Dotconf is an advanced configuration parser which allow nested sections to any level, typed values in syntax, file include and so more. Dotconf is also shipped with a powerful schema validation system.

The full documentation can be found here: http://dotconf.readthedocs.org

Features

  • Configuration format kept as simple as possible.
  • Developer friendly APIs.
  • Types are expressed in the syntax, so the parser can guess it without validation.
  • Four primitive types: string, number, boolean, or list.
  • More complex composite types can be created using the schema validation system.
  • Nested section of any deep. Sections can take a special "argument" value (look at the example).
  • Schema validation system, all schema can be defined using declarative or imperative way.
  • External file include with globbing.
  • Integration with argparse.
  • Tests (only parser is covered yet)
  • Released under MIT license.

Example

This is an example of configuration file for an imaginary web server:

daemon = True
pidfile = '/var/run/myapp.pid'
interface = '0.0.0.0:80'
interface_ssl = '0.0.0.0:443'

host 'example.org' {
    path '/' {
        rate_limit = 30
    }
}

host 'protected.example.org' {
    enable_ssl = yes

    path '/files' {
        enable_auth = yes
        user 'foo' {
            password = 'bar'
        }
    }
}

You can access to each values using the developer friendly API:

>>> from dotconf import Dotconf
>>> parsed_conf = Dotconf.from_file('mywebserver.conf')
>>> print parsed_conf.get('daemon', False)
True

Even more exciting, you can create a validation schema to avoid you the painful chore of manual configuration file validation:

from dotconf.schema import many, once
from dotconf.schema.containers import Section, Value
from dotconf.schema.types import Boolean, Integer, Float, String

# Schema definition:

class UserSection(Section):
    password = Value(String())
    _meta = {'repeat': many, 'unique': True}

class PathSection(Section):
    rate_limit = Value(Float(), default=0)
    enable_auth = Value(Boolean(), default=False)
    user = UserSection()

class VirtualHostSection(Section):
    base_path = Value(String())
    enable_ssl = Value(Boolean(), default=False)
    path = PathSection()
    _meta = {'repeat': many, 'unique': True}

class MyWebserverConfiguration(Section):
    daemon = Value(Boolean()default=False)
    pidfile = Value(String(), default=None)
    interface = Value(String(), default='127.0.0.1:80')
    interface_ssl = Value(String(), default='127.0.0.1:443')
    host = VirtualHostSection()

Then you can use the API exactly as if it was not validated:

>>> from dotconf import Dotconf
>>> from myconfschema import MyWebserverConfiguration
>>> parsed_conf = Dotconf(conf, schema=MyWebserverConfiguration)
>>> print 'daemon:', parsed_conf.get('daemon')
daemon: True
>>> for vhost in parsed_conf.subsections('host'):
>>>     print vhost.args[0]
>>>     if vhost.get('enable_ssl'):
>>>         print '  SSL enabled'
>>>     for path in vhost.subsections('path'):
>>>         print '  ' + path.args[0]
>>>         if path.get('enable_auth'):
>>>             print '    Following users can access to this directory:'
>>>             for user in path.subsections('user'):
>>>                 print '     - ' + user.args[0]
>>>
example.org
  /
protected.example.org
  SSL enabled
  /files
    Following users can access to this directory:
      - foo

Setup

The fastest and more common way to install Dotconf is using pip:

pip install dotconf

Debian

If you use Debian, you can also use the Tecknet repositories. Add this lines in your /etc/apt/source.list file:

deb http://debian.tecknet.org/debian squeeze tecknet
deb-src http://debian.tecknet.org/debian squeeze tecknet

Add the Tecknet repositories key in your keyring:

# wget http://debian.tecknet.org/debian/public.key -O - | apt-key add -

Then, update and install:

# aptitude update
# aptitude install python-dotconf

Archlinux

If you use Archlinux, a Dotconf package is available in Aur:

yaourt -S python2-dotconf

TODO

  • More test.

Changelog

v0.4 released on 07/04/2012

  • Added debian package
  • Added IPSocketAddress type
  • Added Array container
  • Added release procedure
  • Fixed bug on IPAddress and IPNetwork types when ipaddr is missing
  • Fixed documentation build

v0.3 released on 04/04/2012

  • Added IPAddress, IPNetwork, Regex and Url types
  • Added min and max options on Integer type
  • Added units on number parsing (42k == 42000)
  • Fixed bug with validation of long numbers

v0.2 released on 03/04/2012

  • Added argparse integration feature & documentation
  • Cleanup

v0.1 released on 24/03/2012

  • Initial version.

Contribute

You can contribute to Dotconf through these ways:

Feel free to contact me for any question/suggestion: <antoine@inaps.org>.