83 lines
3.2 KiB
Python
83 lines
3.2 KiB
Python
import py
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defaultconftestpath = py.magic.autopath().dirpath('defaultconftest.py')
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class Conftest(object):
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""" the single place for accessing values and interacting
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towards conftest modules from py.test objects.
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Note that triggering Conftest instances to import
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conftest.py files may result in added cmdline options.
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XXX
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"""
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def __init__(self, path=None, onimport=None):
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self._path2confmods = {}
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self._onimport = onimport
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if path is not None:
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self.setinitial([path])
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def setinitial(self, args):
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""" try to find a first anchor path for looking up global values
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from conftests. This function is usually called _before_
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argument parsing. conftest files may add command line options
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and we thus have no completely safe way of determining
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which parts of the arguments are actually related to options
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and which are file system paths. We just try here to get
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bootstrapped ...
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"""
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current = py.path.local()
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for arg in args + [current]:
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anchor = current.join(arg, abs=1)
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if anchor.check(): # we found some file object
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self._path2confmods[None] = self.getconftestmodules(anchor)
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break
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else:
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assert 0, "no root of filesystem?"
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def getconftestmodules(self, path):
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""" return a list of imported conftest modules for the given path. """
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try:
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clist = self._path2confmods[path]
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except KeyError:
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if path is None:
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raise ValueError("missing default conftest.")
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dp = path.dirpath()
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if dp == path:
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return [self.importconftest(defaultconftestpath)]
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clist = self.getconftestmodules(dp)
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conftestpath = path.join("conftest.py")
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if conftestpath.check(file=1):
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clist.append(self.importconftest(conftestpath))
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self._path2confmods[path] = clist
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# be defensive: avoid changes from caller side to
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# affect us by always returning a copy of the actual list
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return clist[:]
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def rget(self, name, path=None):
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mod, value = self.rget_with_confmod(name, path)
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return value
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def rget_with_confmod(self, name, path=None):
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modules = self.getconftestmodules(path)
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modules.reverse()
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for mod in modules:
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try:
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return mod, getattr(mod, name)
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except AttributeError:
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continue
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raise KeyError, name
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def importconftest(self, conftestpath):
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# Using caching here looks redundant since ultimately
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# sys.modules caches already
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assert conftestpath.check(), conftestpath
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if not conftestpath.dirpath('__init__.py').check(file=1):
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# HACK: we don't want any "globally" imported conftest.py,
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# prone to conflicts and subtle problems
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modname = str(conftestpath).replace('.', conftestpath.sep)
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mod = conftestpath.pyimport(modname=modname)
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else:
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mod = conftestpath.pyimport()
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if self._onimport:
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self._onimport(mod)
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return mod
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