149 lines
4.0 KiB
Python
Executable File
149 lines
4.0 KiB
Python
Executable File
#!/usr/bin/env python
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# Copyright 2017, Major Hayden <major@mhtx.net>
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#
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# Licensed under the Apache License, Version 2.0 (the "License");
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# you may not use this file except in compliance with the License.
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# You may obtain a copy of the License at
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#
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# http://www.apache.org/licenses/LICENSE-2.0
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#
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# Unless required by applicable law or agreed to in writing, software
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# distributed under the License is distributed on an "AS IS" BASIS,
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# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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# See the License for the specific language governing permissions and
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# limitations under the License.
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"""Handle all shell commands/arguments/options."""
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import importlib
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import os
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import pkgutil
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import sys
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import click
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context_settings = dict(auto_envvar_prefix='MonitorStack')
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class Context(object):
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"""Set up a context object that we can pass."""
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def __init__(self):
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"""Initialize class."""
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self.verbose = False
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self.home = os.getcwd()
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def log(self, msg, *args):
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"""Log a message to stderr."""
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click.echo(msg, file=sys.stderr)
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def vlog(self, msg, *args):
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"""Log a message to stderr only if verbose is enabled."""
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if self.verbose:
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self.log(msg, *args)
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pass_context = click.make_pass_decorator(Context, ensure=True)
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class MonitorStackCLI(click.MultiCommand):
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"""Create a complex command finder."""
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@property
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def cmd_folder(self):
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"""Get the path to the plugin directory."""
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return os.path.abspath(
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os.path.join(
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os.path.dirname(__file__),
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'plugins'
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)
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)
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def list_commands(self, ctx):
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"""Get a list of all available commands."""
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rv = list()
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for _, pkg_name, _ in pkgutil.iter_modules([self.cmd_folder]):
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rv.append(pkg_name)
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else:
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return sorted(rv)
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def get_command(self, ctx, name):
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"""Load a command and run it."""
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for _, pkg_name, _ in pkgutil.iter_modules([self.cmd_folder]):
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if pkg_name == name:
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mod = importlib.import_module(
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'monitorstack.plugins.{}'.format(name)
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)
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return getattr(mod, 'cli')
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else:
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raise SystemExit('Module "{}" Not Found.'.format(name))
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VALID_OUTPUT_FORMATS = [
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'json',
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'line',
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'telegraf',
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'rax-maas',
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'elasticsearch'
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]
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@click.command(cls=MonitorStackCLI, context_settings=context_settings)
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@click.option(
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'-f', '--format', 'output_format',
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type=click.Choice(VALID_OUTPUT_FORMATS),
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default='json',
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help="Output format (valid options: {}".format(
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', '.join(VALID_OUTPUT_FORMATS)
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),
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)
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@click.option('--config-file',
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help='MonitorStack configuration file',
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default='openstack.ini')
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@click.option('-v', '--verbose', is_flag=True, help='Enables verbose mode.')
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@pass_context
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def cli(*args, **kwargs):
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"""A complex command line interface."""
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try:
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args[0].verbose = kwargs.get('verbose', False)
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except IndexError: # pragma: no cover
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pass
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@cli.resultcallback(replace=True)
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def process_result(results, output_format, **kwargs):
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"""Render the output into the proper format."""
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module_name = 'monitorstack.common.formatters'
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method_name = 'write_{}'.format(output_format.replace('-', '_'))
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output_formatter = getattr(
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importlib.import_module(module_name),
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method_name
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)
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# Force the output formatter into a list
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if not isinstance(results, list): # pragma: no cover
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results = [results]
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exit_code = 0
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for result in results:
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output_formatter(result, kwargs['config_file'])
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if result['exit_code'] != 0:
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exit_code = result['exit_code']
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else:
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sys.exit(exit_code)
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if __name__ == '__main__': # pragma: no cover
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topdir = os.path.normpath(
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os.path.join(
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os.path.abspath(
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sys.argv[0]
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),
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os.pardir,
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os.pardir
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)
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)
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sys.path.insert(0, topdir)
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cli()
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