Wrong parsing of argument when passing an option #611

This is what happens to me.

cfy blueprints upload /home/nir0s/repos/cloudify/simple-python-webserver-blueprint/blueprint.yaml --validate
Usage: cfy [OPTIONS] BLUEPRINT_PATH

Error: Got unexpected extra arguments (h o m e / n i r 0 s / r e p o s / c l o u d i f y / s i m p l e - p y t h o n - w e b s e r v e r - b l u e p r i n t / b l u e p r i n t . y a m l)

The command's code is:

@blueprints.command(name='upload')
@click.argument('blueprint-path', nargs=1, required=True)
@cfy.options.blueprint_id()
@cfy.options.blueprint_filename()
@cfy.options.validate
def upload(blueprint_path,
           blueprint_id,
           blueprint_filename,
           validate):
    """Upload a blueprint to the manager
    """
    ...

and cfy.options.validate is this:

        self.validate = click.option(
            '--validate',
            is_flag=True,
            help=helptexts.VALIDATE_BLUEPRINT)
...

Where this command is a part of a group called blueprints which doesn't implement any special

A few things to note:

• When I don't provide the --validate flag, it parses well.
• When I provide something that doesn't start with /, it also parses well.
• I can't use the File type provided by click to verify the path because it can also be a url
• I'm running Python 2.7.1
• I tried Click 4 and updated 6.6 and it gave me the same error.