#29152: Allow more control over ArgumentParser initialization in management
commands
-------------------------------------+-------------------------------------
Reporter: Dmitry | Owner: nobody
Type: | Status: new
Cleanup/optimization |
Component: Core (Management | Version: 2.0
commands) |
Severity: Normal | Resolution:
Keywords: | Triage Stage: Accepted
Has patch: 0 | Needs documentation: 0
Needs tests: 0 | Patch needs improvement: 0
Easy pickings: 0 | UI/UX: 0
-------------------------------------+-------------------------------------
Comment (by Dmitry):
Replying to [comment:3 Tim Graham]:
> Would a hook to provide some additional keyword arguments be sufficient?
Yeah, this will be great, maybe the better way. I was thinking about way
to implement this, but was unable to find beautiful enough way to add such
hook. Maybe you have some good ideas.
As a reference my idea was something like this:
1. Add parser_kwargs argument in BaseCommand.__init__, defaults to {}
{{{
def __init__(self, stdout=None, stderr=None, no_color=False,
parser_kwargs=None):
self.stdout = OutputWrapper(stdout or sys.stdout)
self.stderr = OutputWrapper(stderr or sys.stderr)
if no_color:
self.style = no_style()
else:
self.style = color_style()
self.stderr.style_func = self.style.ERROR
if not parser_kwargs:
parser_kwargs = {}
}}}
2. use parser_kwargs in create_parser method
{{{
def create_parser(self, prog_name, subcommand):
"""
Create and return the ``ArgumentParser`` which will be used to
parse the arguments to this command.
"""
if not 'prog' in self.parser_kwargs:
self.parser_kwargs['prog'] = os.path.basename(prog_name),
subcommand)
if not 'description' in self.parser_kwargs:
self.parser_kwargs['description'] = self.help or None
parser = CommandParser(
self, **self.parser_kwargs
)
}}}
The problem is that in this case you will have two conflicting way to
define description (using parser_kwargs or help).
--
Ticket URL: <https://code.djangoproject.com/ticket/29152#comment:4>
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