Description of problem:
I'm new to atomic-reactor but I can not get it to work based on what I read in the man page and the usage printed by the tool.

Version-Release number of selected component (if applicable):
atomic-reactor-1.4.0-2.fc22.noarch

How reproducible:
always

Steps to Reproduce:
nneeoo@nneeoo-pc ~/tmp/docker-test
$ atomic-reactor build path
usage: atomic-reactor [OPTIONS] build path
atomic-reactor [OPTIONS] build path: error: the following arguments are required: --uri, --method
nneeoo@nneeoo-pc ~/tmp/docker-test
$ atomic-reactor build path --method=here --uri=/foo/bar
Traceback (most recent call last):
  File "/usr/bin/atomic-reactor", line 9, in <module>
    load_entry_point('atomic-reactor==1.4.0', 'console_scripts', 'atomic-reactor')()
  File "/usr/lib/python3.4/site-packages/atomic_reactor/cli/main.py", line 292, in run
    cli.run()
  File "/usr/lib/python3.4/site-packages/atomic_reactor/cli/main.py", line 275, in run
    args.func(args)
  File "/usr/lib/python3.4/site-packages/atomic_reactor/cli/main.py", line 56, in cli_build_image
    build_result = build_image_here(plugin_files=args.plugin_files, **common_kwargs)
  File "/usr/lib/python3.4/site-packages/atomic_reactor/api.py", line 124, in build_image_here
    return m.build_docker_image()
  File "/usr/lib/python3.4/site-packages/atomic_reactor/inner.py", line 289, in build_docker_image
    self.builder = InsideBuilder(self.source, self.image)
  File "/usr/lib/python3.4/site-packages/atomic_reactor/build.py", line 92, in __init__
    self.image = ImageName.parse(image)
  File "/usr/lib/python3.4/site-packages/atomic_reactor/util.py", line 39, in parse
    s = image_name.split('/', 2)
AttributeError: 'NoneType' object has no attribute 'split'
nneeoo@nneeoo-pc ~/tmp/docker-test
$ ls 
Dockerfile

Actual results:
traceback

Expected results:
some meaningful error message helping me to resolve my problem

Additional info: