def union(self, other): # type: (VersionConstraint) -> VersionConstraint
from pipgrip.libs.semver.version import Version
if isinstance(other, Version):
if self.allows(other):
return self
if other == self.min:
return VersionRange(
self.min, self.max, include_min=True, include_max=self.include_max
)
if other == self.max:
return VersionRange(
self.min, self.max, include_min=self.include_min, include_max=True
)
return VersionUnion.of(self, other)
if isinstance(other, VersionRange):
# If the two ranges don't overlap, we won't be able to create a single
# VersionRange for both of them.
edges_touch = (
self.max == other.min and (self.include_max or other.include_min)
) or (self.min == other.max and (self.include_min or other.include_max))
if not edges_touch and not self.allows_any(other):
return VersionUnion.of(self, other)
if self.allows_lower(other):
union_min = self.min
union_include_min = self.include_min
else:
union_min = other.min
union_include_min = other.include_min
if self.allows_higher(other):
union_max = self.max
union_include_max = self.include_max
else:
union_max = other.max
union_include_max = other.include_max
return VersionRange(
union_min,
union_max,
include_min=union_include_min,
include_max=union_include_max,
)
return VersionUnion.of(self, other)
def parse_constraint(constraints): # type: (str) -> VersionConstraint
if constraints == "*":
return VersionRange()
or_constraints = re.split(r"\s*\|\|?\s*", constraints.strip())
or_groups = []
for constraints in or_constraints:
and_constraints = re.split(
"(?<!^)(?<![=>< ,]) *(?<!-)[, ](?!-) *(?!,|$)", constraints
)
constraint_objects = []
if len(and_constraints) > 1:
for constraint in and_constraints:
constraint_objects.append(parse_single_constraint(constraint))
else:
constraint_objects.append(parse_single_constraint(and_constraints[0]))
if len(constraint_objects) == 1:
constraint = constraint_objects[0]
else:
constraint = constraint_objects[0]
for next_constraint in constraint_objects[1:]:
constraint = constraint.intersect(next_constraint)
or_groups.append(constraint)
if len(or_groups) == 1:
return or_groups[0]
else:
return VersionUnion.of(*or_groups)
def union(self, other): # type: (VersionConstraint) -> VersionConstraint
from pipgrip.libs.semver.version_range import VersionRange
if other.allows(self):
return other
if isinstance(other, VersionRange):
if other.min == self:
return VersionRange(
other.min,
other.max,
include_min=True,
include_max=other.include_max,
)
if other.max == self:
return VersionRange(
other.min,
other.max,
include_min=other.include_min,
include_max=True,
)
return VersionUnion.of(self, other)
def parse_single_constraint(constraint): # type: (str) -> VersionConstraint
m = re.match(r"(?i)^v?[xX*](\.[xX*])*$", constraint)
if m:
return VersionRange()
# Tilde range
m = TILDE_CONSTRAINT.match(constraint)
if m:
version = Version.parse(m.group(1))
high = version.stable.next_minor
if len(m.group(1).split(".")) == 1:
high = version.stable.next_major
return VersionRange(
version, high, include_min=True, always_include_max_prerelease=True
)
# PEP 440 Tilde range (~=)
m = TILDE_PEP440_CONSTRAINT.match(constraint)
if m:
precision = 1
if m.group(3):
precision += 1
if m.group(4):
precision += 1
version = Version.parse(m.group(1))
if precision == 2:
low = version
high = version.stable.next_major
else:
low = version
high = version.stable.next_minor
return VersionRange(
low, high, include_min=True, always_include_max_prerelease=True
)
# Caret range
m = CARET_CONSTRAINT.match(constraint)
if m:
version = Version.parse(m.group(1))
return VersionRange(
version,
version.next_breaking,
include_min=True,
always_include_max_prerelease=True,
)
# X Range
m = X_CONSTRAINT.match(constraint)
if m:
op = m.group(1)
major = int(m.group(2))
minor = m.group(3)
if minor is not None:
version = Version(major, int(minor), 0)
result = VersionRange(
version,
version.next_minor,
include_min=True,
always_include_max_prerelease=True,
)
else:
if major == 0:
result = VersionRange(max=Version(1, 0, 0))
else:
version = Version(major, 0, 0)
result = VersionRange(
version,
version.next_major,
include_min=True,
always_include_max_prerelease=True,
)
if op == "!=":
result = VersionRange().difference(result)
return result
# Basic comparator
m = BASIC_CONSTRAINT.match(constraint)
if m:
op = m.group(1)
version = m.group(2)
if version == "dev":
version = "0.0-dev"
try:
version = Version.parse(version)
except ValueError:
raise ValueError(
"Could not parse version constraint: {}".format(constraint)
)
if op == "<":
return VersionRange(max=version)
elif op == "<=":
return VersionRange(max=version, include_max=True)
elif op == ">":
return VersionRange(min=version)
elif op == ">=":
return VersionRange(min=version, include_min=True)
elif op == "!=":
return VersionUnion(VersionRange(max=version), VersionRange(min=version))
else:
return version
raise ValueError("Could not parse version constraint: {}".format(constraint))
def difference(self, other): # type: (VersionConstraint) -> VersionConstraint
from pipgrip.libs.semver.version import Version
if other.is_empty():
return self
if isinstance(other, Version):
if not self.allows(other):
return self
if other == self.min:
if not self.include_min:
return self
return VersionRange(self.min, self.max, False, self.include_max)
if other == self.max:
if not self.include_max:
return self
return VersionRange(self.min, self.max, self.include_min, False)
return VersionUnion.of(
VersionRange(self.min, other, self.include_min, False),
VersionRange(other, self.max, False, self.include_max),
)
elif isinstance(other, VersionRange):
if not self.allows_any(other):
return self
if not self.allows_lower(other):
before = None
elif self.min == other.min:
before = self.min
else:
before = VersionRange(
self.min, other.min, self.include_min, not other.include_min
)
if not self.allows_higher(other):
after = None
elif self.max == other.max:
after = self.max
else:
after = VersionRange(
other.max, self.max, not other.include_max, self.include_max
)
if before is None and after is None:
return EmptyConstraint()
if before is None:
return after
if after is None:
return before
return VersionUnion.of(before, after)
elif isinstance(other, VersionUnion):
ranges = [] # type: List[VersionRange]
current = self
for range_ in other.ranges:
# Skip any ranges that are strictly lower than [current].
if range_.is_strictly_lower(current):
continue
# If we reach a range strictly higher than [current], no more ranges
# will be relevant so we can bail early.
if range_.is_strictly_higher(current):
break
difference = current.difference(range_)
if difference.is_empty():
return EmptyConstraint()
elif isinstance(difference, VersionUnion):
# If [range] split [current] in half, we only need to continue
# checking future ranges against the latter half.
ranges.append(difference.ranges[0])
current = difference.ranges[-1]
else:
current = difference
if not ranges:
return current
return VersionUnion.of(*(ranges + [current]))
raise ValueError("Unknown VersionConstraint type {}.".format(other))