from argparse import ArgumentParser

import yaml

from .runner import Runner


def parse_variables(args):
    variables = {}

    if args is not None:
        for variable in args:
            tokens = variable.split('=')
            name = tokens[0]
            value = '='.join(tokens[1:])
            variables[name] = value

    return variables


def main():
    parser = ArgumentParser()
    parser.add_argument('-f', '--file', default='mo.yaml')
    parser.add_argument('-v', '--var', dest='variables', nargs='*')
    parser.add_argument('tasks', metavar='task', nargs='+')
    args = parser.parse_args()

    with open(args.file) as file:
        configuration = yaml.load(file.read())

    variables = parse_variables(args.variables)

    runner = Runner(configuration, variables)

    for task in args.tasks:
        runner.run_task(task)

from argparse import ArgumentParser

import yaml

from .runner import Runner


def parse_variables(args):
    variables = {}

    if args is not None:
        for variable in args:
            tokens = variable.split('=')
            name = tokens[0]
            value = '='.join(tokens[1:])
            variables[name] = value

    return variables


def main():
    parser = ArgumentParser()
    parser.add_argument('-f', '--file', default='mo.yaml')
    parser.add_argument('-v', '--var', dest='variables', nargs='*')
    parser.add_argument('tasks', metavar='task', nargs='*')
    args = parser.parse_args()

    with open(args.file) as file:
        configuration = yaml.load(file.read())

    variables = parse_variables(args.variables)

    runner = Runner(configuration, variables)

    if args.tasks is None:
        for task in args.tasks:
            runner.run_task(task)
    else:
        print()
        for task in runner.tasks.values():
            print('', task.name, '-', task.description)

Add a way of listing commands
Add a way of listing commands

  from argparse import ArgumentParser
  
  import yaml
  
  from .runner import Runner
  
  
  def parse_variables(args):
      variables = {}
  
      if args is not None:
          for variable in args:
              tokens = variable.split('=')
              name = tokens[0]
              value = '='.join(tokens[1:])
              variables[name] = value
  
      return variables
  
  
  def main():
      parser = ArgumentParser()
      parser.add_argument('-f', '--file', default='mo.yaml')
      parser.add_argument('-v', '--var', dest='variables', nargs='*')
-     parser.add_argument('tasks', metavar='task', nargs='+')
+     parser.add_argument('tasks', metavar='task', nargs='*')
      args = parser.parse_args()
  
      with open(args.file) as file:
          configuration = yaml.load(file.read())
  
      variables = parse_variables(args.variables)
  
      runner = Runner(configuration, variables)
  
+     if args.tasks is None:
-     for task in args.tasks:
+         for task in args.tasks:
-         runner.run_task(task)
+             runner.run_task(task)
+     else:
+         print()
+         for task in runner.tasks.values():
+             print('', task.name, '-', task.description)
  
Add a way of listing commands
## Code Before:
from argparse import ArgumentParser

import yaml

from .runner import Runner


def parse_variables(args):
    variables = {}

    if args is not None:
        for variable in args:
            tokens = variable.split('=')
            name = tokens[0]
            value = '='.join(tokens[1:])
            variables[name] = value

    return variables


def main():
    parser = ArgumentParser()
    parser.add_argument('-f', '--file', default='mo.yaml')
    parser.add_argument('-v', '--var', dest='variables', nargs='*')
    parser.add_argument('tasks', metavar='task', nargs='+')
    args = parser.parse_args()

    with open(args.file) as file:
        configuration = yaml.load(file.read())

    variables = parse_variables(args.variables)

    runner = Runner(configuration, variables)

    for task in args.tasks:
        runner.run_task(task)

## Instruction:
Add a way of listing commands
## Code After:
from argparse import ArgumentParser

import yaml

from .runner import Runner


def parse_variables(args):
    variables = {}

    if args is not None:
        for variable in args:
            tokens = variable.split('=')
            name = tokens[0]
            value = '='.join(tokens[1:])
            variables[name] = value

    return variables


def main():
    parser = ArgumentParser()
    parser.add_argument('-f', '--file', default='mo.yaml')
    parser.add_argument('-v', '--var', dest='variables', nargs='*')
    parser.add_argument('tasks', metavar='task', nargs='*')
    args = parser.parse_args()

    with open(args.file) as file:
        configuration = yaml.load(file.read())

    variables = parse_variables(args.variables)

    runner = Runner(configuration, variables)

    if args.tasks is None:
        for task in args.tasks:
            runner.run_task(task)
    else:
        print()
        for task in runner.tasks.values():
            print('', task.name, '-', task.description)
