def test_eq(self):
p = (packages.PackageRestriction('one', values.AlwaysTrue), )
p2 = (packages.PackageRestriction('one', values.AlwaysFalse), )
v = values.AlwaysTrue
v2 = values.AlwaysFalse
self.assertEqual(packages.Conditional('use', v, p),
packages.Conditional('use', v, p))
self.assertNotEqual(packages.Conditional('use', v2, p),
packages.Conditional('use', v, p))
self.assertNotEqual(packages.Conditional('use', v, p),
packages.Conditional('use', v, p2))
self.assertNotEqual(packages.Conditional('use1', v, p),
packages.Conditional('use', v, p))
def parse(cls,
dep_str,
element_class,
operators=None,
element_func=None,
transitive_use_atoms=False,
allow_src_uri_file_renames=False):
"""
:param dep_str: string abiding by DepSet syntax
:param operators: mapping of node -> callable for special operators
in DepSet syntax
:param element_func: if None, element_class is used for generating
elements, else it's used to generate elements.
Mainly useful for when you need to curry a few args for instance
generation, since element_class _must_ be a class
:param element_class: class of generated elements
"""
if not isinstance(element_class, type):
# yes, this blocks non new style classes. touch cookies.
raise ValueError("element_class must be a new style class")
if element_func is None:
element_func = element_class
if cls.parse_depset is not None and not (allow_src_uri_file_renames):
restrictions = None
if operators is None:
has_conditionals, restrictions = cls.parse_depset(
dep_str, element_func, boolean.AndRestriction,
boolean.OrRestriction)
else:
for x in operators:
if x not in ("", "||"):
break
else:
has_conditionals, restrictions = cls.parse_depset(
dep_str, element_func, operators.get(""),
operators.get("||"))
if restrictions is not None:
if not has_conditionals and transitive_use_atoms:
has_conditionals = cls._has_transitive_use_atoms(
restrictions)
return cls(restrictions, element_class, has_conditionals)
restrictions = []
if operators is None:
operators = {
"||": boolean.OrRestriction,
"": boolean.AndRestriction
}
raw_conditionals = []
depsets = [restrictions]
node_conds = False
words = iter(dep_str.split())
# we specifically do it this way since expandable_chain has a bit of nasty
# overhead to the tune of 33% slower
if allow_src_uri_file_renames:
words = expandable_chain(words)
k = None
try:
for k in words:
if ")" == k:
# no elements == error. if closures don't map up,
# indexerror would be chucked from trying to pop
# the frame so that is addressed.
if not depsets[-1] or not raw_conditionals:
raise ParseError(dep_str)
elif raw_conditionals[-1] in operators:
if len(depsets[-1]) == 1:
depsets[-2].append(depsets[-1][0])
elif raw_conditionals[-1] == '' and (
len(raw_conditionals) == 1 or
('' == raw_conditionals[-2])):
# if the frame is an and and the parent is an and, collapse it in.
depsets[-2].extend(depsets[-1])
else:
depsets[-2].append(
operators[raw_conditionals[-1]](*depsets[-1]))
else:
node_conds = True
c = raw_conditionals[-1]
if c[0] == "!":
c = values.ContainmentMatch(c[1:-1], negate=True)
else:
c = values.ContainmentMatch(c[:-1])
depsets[-2].append(
packages.Conditional("use", c, tuple(depsets[-1])))
raw_conditionals.pop()
depsets.pop()
elif "(" == k:
k = ''
# push another frame on
depsets.append([])
raw_conditionals.append(k)
elif k[-1] == '?' or k in operators:
# use conditional or custom op.
# no tokens left == bad dep_str.
k2 = words.next()
if k2 != "(":
raise ParseError(dep_str, k2)
# push another frame on
depsets.append([])
raw_conditionals.append(k)
elif "|" in k:
raise ParseError(dep_str, k)
elif allow_src_uri_file_renames:
try:
k2 = words.next()
except StopIteration:
depsets[-1].append(element_func(k))
else:
if k2 != '->':
depsets[-1].append(element_func(k))
words.appendleft((k2, ))
else:
k3 = words.next()
# file ename.
depsets[-1].append(element_func(k, k3))
else:
# node/element.
depsets[-1].append(element_func(k))
except IGNORED_EXCEPTIONS:
raise
except IndexError:
# [][-1] for a frame access, which means it was a parse error.
raise
except StopIteration:
if k is None:
raise
raise ParseError(dep_str, k)
except Exception as e:
raise_from(ParseError(dep_str, e))
# check if any closures required
if len(depsets) != 1:
raise ParseError(dep_str)
if transitive_use_atoms and not node_conds:
# localize to this scope for speed.
element_class = transitive_use_atom
# we can't rely on iter(self) here since it doesn't
# descend through boolean restricts.
node_conds = cls._has_transitive_use_atoms(restrictions)
return cls(tuple(restrictions), element_class, node_conds)
