The nova.openstack.common.cliutils Module

exception MissingArgs(missing)

Bases: exceptions.Exception

Supplied arguments are not sufficient for calling a function.

add_arg(func, *args, **kwargs)

Bind CLI arguments to a shell.py do_foo function.

arg(*args, **kwargs)

Decorator for CLI args.

Example:

>>> @arg("name", help="Name of the new entity")
... def entity_create(args):
...     pass

env(*args, **kwargs)

Returns the first environment variable set.

If all are empty, defaults to ‘’ or keyword arg default.

exit(msg='')

get_password(max_password_prompts=3)

Read password from TTY.

get_service_type(f)

Retrieves service type from function.

isunauthenticated(func)

Checks if the function does not require authentication.

Mark such functions with the @unauthenticated decorator.

Returns:bool

pretty_choice_list(l)

print_dict(dct, dict_property='Property', wrap=0, dict_value='Value')

Print a dict as a table of two columns.

Parameters:

• dct – dict to print
• dict_property – name of the first column
• wrap – wrapping for the second column
• dict_value – header label for the value (second) column

print_list(objs, fields, formatters=None, sortby_index=0, mixed_case_fields=None, field_labels=None)

Print a list or objects as a table, one row per object.

Parameters:

• objs – iterable of Resource
• fields – attributes that correspond to columns, in order
• formatters – dict of callables for field formatting
• sortby_index – index of the field for sorting table rows
• mixed_case_fields – fields corresponding to object attributes that have mixed case names (e.g., ‘serverId’)
• field_labels – Labels to use in the heading of the table, default to fields.

service_type(stype)

Adds ‘service_type’ attribute to decorated function.

Usage:

@service_type('volume')
def mymethod(f):
...

unauthenticated(func)

Adds ‘unauthenticated’ attribute to decorated function.

Usage:

>>> @unauthenticated
... def mymethod(f):
...     pass

validate_args(fn, *args, **kwargs)

Check that the supplied args are sufficient for calling a function.

>>> validate_args(lambda a: None)
Traceback (most recent call last):
    ...
MissingArgs: Missing argument(s): a
>>> validate_args(lambda a, b, c, d: None, 0, c=1)
Traceback (most recent call last):
    ...
MissingArgs: Missing argument(s): b, d

Parameters:

• fn – the function to check
• arg – the positional arguments supplied
• kwargs – the keyword arguments supplied