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A python framework to write large CLIs. The concept is to automagically derive CLI commands and args based on the object graph of a callable class that implements a CLI command (command name is derived from the class name). It uses argparse_ to create the CLI parser and pinject_ as the Dependency_Injection_ engine. You implement a class - e.g.: DoSomething
- and that generates the name of a subcommand - e.g: do-something
. Then, based on the dependencies of class DoSomething
, we will derive the arguments, e.g.: if DoSomething
depends on Dependency
, which in turn declares __args__ = [bigcli.arg('--option', required=False, help='help')]
(add_argument_ method from argparse_), then command do-something
will have a '--option' argument.
In theory, the auto-generation of arguments should enables and encourage the reuse of internal components for rapid development of consistent and testable rich CLIs, especially those that operate platforms.
.. code-block:: python
#!/usr/bin/env python import bigcli
class Dependency(object):
args = [
bigcli.arg('--option') # short for lambda p: p.add_argument('--option')
]
def __init__(self, args):
self.option = args.option
class Command(object): parent = 'sub-command' depends_on = [Dependency]
def __init__(self, dependency):
self.dependency = dependency
def __call__(self):
print "dependency option: {}".format(self.dependency.option)
if name == "main": bigcli.BigCli(commands=[Command]).execute()
__depends_on__
and __args__
attributes.__parent__ = 'subcommand'
attribute.This package was created with Cookiecutter_ and the audreyr/cookiecutter-pypackage
_ project template.
.. _Dependency_Injection: https://en.wikipedia.org/wiki/Dependency_injection
.. _Cookiecutter: https://github.com/audreyr/cookiecutter
.. _audreyr/cookiecutter-pypackage
: https://github.com/audreyr/cookiecutter-pypackage
.. _add_argument: https://docs.python.org/3/library/argparse.html#argparse.ArgumentParser.add_argument
.. _argparse: https://docs.python.org/2/howto/argparse.html
.. _pinject: https://github.com/google/pinject
FAQs
A python framwork to write large CLIs using dependency injection
We found that bigcli demonstrated a healthy version release cadence and project activity because the last version was released less than a year ago. It has 1 open source maintainer collaborating on the project.
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