cliff_minimal_cli_app_with_simple_command.py

1import logging
2import sys
3
4from cliff.app import App
5from cliff.command import Command
6from cliff.commandmanager import CommandManager
7
8
9class Simple(Command):
10    "A simple command that prints a message."
11
12    log = logging.getLogger(__name__)
13
14    def take_action(self, parsed_args):
15        self.log.info('sending greeting')
16        self.log.debug('debugging')
17        sys.stdout.write('hi!\n')
18
19
20class SimpleApp(App):
21
22    def __init__(self):
23        super(SimpleApp, self).__init__(
24            description='cliff demo app',
25            version='0.1',
26            command_manager=CommandManager('cliff.demo'),
27            deferred_help=True,
28            )
29
30    def prepare_to_run_command(self, cmd):
31        self.LOG.debug('prepare_to_run_command %s', cmd.__class__.__name__)
32
33    def clean_up(self, cmd, result, err):
34        self.LOG.debug('clean_up %s', cmd.__class__.__name__)
35        if err:
36            self.LOG.debug('got an error: %s', err)
37
38
39def main(argv=sys.argv[1:]):
40    myapp = SimpleApp()
41    # Manual registration of the command for the quickstart example
42    myapp.command_manager.add_command('simple', Simple)
43    return myapp.run(argv)
44
45
46if __name__ == '__main__':
47    sys.exit(main(sys.argv[1:]))