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########################## LICENCE ###############################
##
## Copyright (c) 2010, Michele Simionato
## All rights reserved.
##
## Redistributions of source code must retain the above copyright
## notice, this list of conditions and the following disclaimer.
## Redistributions in bytecode form must reproduce the above copyright
## notice, this list of conditions and the following disclaimer in
## the documentation and/or other materials provided with the
## distribution.
## THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
## "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
## LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
## A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
## HOLDERS OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
## INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
## BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS
## OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
## ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR
## TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE
## USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH
## DAMAGE.
"""
plac, the easiest Command Line Arguments Parser in the world.
See doc/plac.pdf for the documentation.
"""
__version__ = '0.5.0'
import imp, os, sys, inspect
from plac_core import *
if sys.version >= '2.5':
from plac_ext import Interpreter
try:
PLACDIRS = os.environ.get('PLACPATH', '.').split(':')
except:
raise ValueError('Ill-formed PLACPATH: got %PLACPATHs' % os.environ)
def import_main(path, *args, **pconf):
"""
An utility to import the main function of a plac tool. It also
works with tool factories, if you pass the arguments.
"""
if not os.path.isabs(path): # relative path, look at PLACDIRS
for placdir in PLACDIRS:
fullpath = os.path.join(placdir, path)
if os.path.exists(fullpath):
break
else: # no break
raise ImportError('Cannot find %s', path)
else:
fullpath = path
name, ext = os.path.splitext(os.path.basename(fullpath))
tool = imp.load_module(name, open(fullpath), fullpath, (ext, 'U', 1)).main
if args:
tool = parser_from(tool).consume(args) # instantiate the factory
elif inspect.isclass(tool):
tool = tool() # instantiate it
vars(tool).update(pconf)
parser_from(tool) # raise a TypeError if not
return tool
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