dbt-selly/dbt-env/lib/python3.8/site-packages/dbt/semver.py

452 lines
13 KiB
Python
Raw Normal View History

2022-03-22 15:13:27 +00:00
from dataclasses import dataclass
import re
from typing import List
from packaging import version as packaging_version
from dbt.exceptions import VersionsNotCompatibleException
import dbt.utils
from dbt.dataclass_schema import dbtClassMixin, StrEnum
from typing import Optional
class Matchers(StrEnum):
GREATER_THAN = '>'
GREATER_THAN_OR_EQUAL = '>='
LESS_THAN = '<'
LESS_THAN_OR_EQUAL = '<='
EXACT = '='
@dataclass
class VersionSpecification(dbtClassMixin):
major: Optional[str] = None
minor: Optional[str] = None
patch: Optional[str] = None
prerelease: Optional[str] = None
build: Optional[str] = None
matcher: Matchers = Matchers.EXACT
_MATCHERS = r"(?P<matcher>\>=|\>|\<|\<=|=)?"
_NUM_NO_LEADING_ZEROS = r"(0|[1-9][0-9]*)"
_ALPHA = r"[0-9A-Za-z-]*"
_ALPHA_NO_LEADING_ZEROS = r"(0|[1-9A-Za-z-][0-9A-Za-z-]*)"
_BASE_VERSION_REGEX = r"""
(?P<major>{num_no_leading_zeros})\.
(?P<minor>{num_no_leading_zeros})\.
(?P<patch>{num_no_leading_zeros})
""".format(num_no_leading_zeros=_NUM_NO_LEADING_ZEROS)
_VERSION_EXTRA_REGEX = r"""
(\-?
(?P<prerelease>
{alpha_no_leading_zeros}(\.{alpha_no_leading_zeros})*))?
(\+
(?P<build>
{alpha}(\.{alpha})*))?
""".format(
alpha_no_leading_zeros=_ALPHA_NO_LEADING_ZEROS,
alpha=_ALPHA)
_VERSION_REGEX_PAT_STR = r"""
^
{matchers}
{base_version_regex}
{version_extra_regex}
$
""".format(
matchers=_MATCHERS,
base_version_regex=_BASE_VERSION_REGEX,
version_extra_regex=_VERSION_EXTRA_REGEX)
_VERSION_REGEX = re.compile(_VERSION_REGEX_PAT_STR, re.VERBOSE)
@dataclass
class VersionSpecifier(VersionSpecification):
def to_version_string(self, skip_matcher=False):
prerelease = ''
build = ''
matcher = ''
if self.prerelease:
prerelease = '-' + self.prerelease
if self.build:
build = '+' + self.build
if not skip_matcher:
matcher = self.matcher
return '{}{}.{}.{}{}{}'.format(
matcher,
self.major,
self.minor,
self.patch,
prerelease,
build)
@classmethod
def from_version_string(cls, version_string):
match = _VERSION_REGEX.match(version_string)
if not match:
raise dbt.exceptions.SemverException(
'Could not parse version "{}"'.format(version_string))
matched = {k: v for k, v in match.groupdict().items() if v is not None}
return cls.from_dict(matched)
def __str__(self):
return self.to_version_string()
def to_range(self):
range_start: VersionSpecifier = UnboundedVersionSpecifier()
range_end: VersionSpecifier = UnboundedVersionSpecifier()
if self.matcher == Matchers.EXACT:
range_start = self
range_end = self
elif self.matcher in [Matchers.GREATER_THAN,
Matchers.GREATER_THAN_OR_EQUAL]:
range_start = self
elif self.matcher in [Matchers.LESS_THAN,
Matchers.LESS_THAN_OR_EQUAL]:
range_end = self
return VersionRange(
start=range_start,
end=range_end)
def compare(self, other):
if self.is_unbounded or other.is_unbounded:
return 0
for key in ['major', 'minor', 'patch', 'prerelease']:
(a, b) = (getattr(self, key), getattr(other, key))
if key == 'prerelease':
if a is None and b is None:
continue
if a is None:
if self.matcher == Matchers.LESS_THAN:
# If 'a' is not a pre-release but 'b' is, and b must be
# less than a, return -1 to prevent installations of
# pre-releases with greater base version than a
# maximum specified non-pre-release version.
return -1
# Otherwise, stable releases are considered greater than
# pre-release
return 1
if b is None:
return -1
if packaging_version.parse(a) > packaging_version.parse(b):
return 1
elif packaging_version.parse(a) < packaging_version.parse(b):
return -1
equal = ((self.matcher == Matchers.GREATER_THAN_OR_EQUAL and
other.matcher == Matchers.LESS_THAN_OR_EQUAL) or
(self.matcher == Matchers.LESS_THAN_OR_EQUAL and
other.matcher == Matchers.GREATER_THAN_OR_EQUAL))
if equal:
return 0
lt = ((self.matcher == Matchers.LESS_THAN and
other.matcher == Matchers.LESS_THAN_OR_EQUAL) or
(other.matcher == Matchers.GREATER_THAN and
self.matcher == Matchers.GREATER_THAN_OR_EQUAL) or
(self.is_upper_bound and other.is_lower_bound))
if lt:
return -1
gt = ((other.matcher == Matchers.LESS_THAN and
self.matcher == Matchers.LESS_THAN_OR_EQUAL) or
(self.matcher == Matchers.GREATER_THAN and
other.matcher == Matchers.GREATER_THAN_OR_EQUAL) or
(self.is_lower_bound and other.is_upper_bound))
if gt:
return 1
return 0
def __lt__(self, other):
return self.compare(other) == -1
def __gt__(self, other):
return self.compare(other) == 1
def __eq___(self, other):
return self.compare(other) == 0
def __cmp___(self, other):
return self.compare(other)
@property
def is_unbounded(self):
return False
@property
def is_lower_bound(self):
return self.matcher in [Matchers.GREATER_THAN,
Matchers.GREATER_THAN_OR_EQUAL]
@property
def is_upper_bound(self):
return self.matcher in [Matchers.LESS_THAN,
Matchers.LESS_THAN_OR_EQUAL]
@property
def is_exact(self):
return self.matcher == Matchers.EXACT
@dataclass
class VersionRange:
start: VersionSpecifier
end: VersionSpecifier
def _try_combine_exact(self, a, b):
if a.compare(b) == 0:
return a
else:
raise VersionsNotCompatibleException()
def _try_combine_lower_bound_with_exact(self, lower, exact):
comparison = lower.compare(exact)
if (comparison < 0 or
(comparison == 0 and
lower.matcher == Matchers.GREATER_THAN_OR_EQUAL)):
return exact
raise VersionsNotCompatibleException()
def _try_combine_lower_bound(self, a, b):
if b.is_unbounded:
return a
elif a.is_unbounded:
return b
if not (a.is_exact or b.is_exact):
comparison = (a.compare(b) < 0)
if comparison:
return b
else:
return a
elif a.is_exact:
return self._try_combine_lower_bound_with_exact(b, a)
elif b.is_exact:
return self._try_combine_lower_bound_with_exact(a, b)
def _try_combine_upper_bound_with_exact(self, upper, exact):
comparison = upper.compare(exact)
if (comparison > 0 or
(comparison == 0 and
upper.matcher == Matchers.LESS_THAN_OR_EQUAL)):
return exact
raise VersionsNotCompatibleException()
def _try_combine_upper_bound(self, a, b):
if b.is_unbounded:
return a
elif a.is_unbounded:
return b
if not (a.is_exact or b.is_exact):
comparison = (a.compare(b) > 0)
if comparison:
return b
else:
return a
elif a.is_exact:
return self._try_combine_upper_bound_with_exact(b, a)
elif b.is_exact:
return self._try_combine_upper_bound_with_exact(a, b)
def reduce(self, other):
start = None
if(self.start.is_exact and other.start.is_exact):
start = end = self._try_combine_exact(self.start, other.start)
else:
start = self._try_combine_lower_bound(self.start, other.start)
end = self._try_combine_upper_bound(self.end, other.end)
if start.compare(end) > 0:
raise VersionsNotCompatibleException()
return VersionRange(start=start, end=end)
def __str__(self):
result = []
if self.start.is_unbounded and self.end.is_unbounded:
return 'ANY'
if not self.start.is_unbounded:
result.append(self.start.to_version_string())
if not self.end.is_unbounded:
result.append(self.end.to_version_string())
return ', '.join(result)
def to_version_string_pair(self):
to_return = []
if not self.start.is_unbounded:
to_return.append(self.start.to_version_string())
if not self.end.is_unbounded:
to_return.append(self.end.to_version_string())
return to_return
class UnboundedVersionSpecifier(VersionSpecifier):
def __init__(self, *args, **kwargs):
super().__init__(
matcher=Matchers.EXACT,
major=None,
minor=None,
patch=None,
prerelease=None,
build=None
)
def __str__(self):
return "*"
@property
def is_unbounded(self):
return True
@property
def is_lower_bound(self):
return False
@property
def is_upper_bound(self):
return False
@property
def is_exact(self):
return False
def reduce_versions(*args):
version_specifiers = []
for version in args:
if isinstance(version, UnboundedVersionSpecifier) or version is None:
continue
elif isinstance(version, VersionSpecifier):
version_specifiers.append(version)
elif isinstance(version, VersionRange):
if not isinstance(version.start, UnboundedVersionSpecifier):
version_specifiers.append(version.start)
if not isinstance(version.end, UnboundedVersionSpecifier):
version_specifiers.append(version.end)
else:
version_specifiers.append(
VersionSpecifier.from_version_string(version))
for version_specifier in version_specifiers:
if not isinstance(version_specifier, VersionSpecifier):
raise Exception(version_specifier)
if not version_specifiers:
return VersionRange(start=UnboundedVersionSpecifier(),
end=UnboundedVersionSpecifier())
try:
to_return = version_specifiers.pop().to_range()
for version_specifier in version_specifiers:
to_return = to_return.reduce(version_specifier.to_range())
except VersionsNotCompatibleException:
raise VersionsNotCompatibleException(
'Could not find a satisfactory version from options: {}'
.format([str(a) for a in args]))
return to_return
def versions_compatible(*args):
if len(args) == 1:
return True
try:
reduce_versions(*args)
return True
except VersionsNotCompatibleException:
return False
def find_possible_versions(requested_range, available_versions):
possible_versions = []
for version_string in available_versions:
version = VersionSpecifier.from_version_string(version_string)
if(versions_compatible(version,
requested_range.start,
requested_range.end)):
possible_versions.append(version)
sorted_versions = sorted(possible_versions, reverse=True)
return [v.to_version_string(skip_matcher=True) for v in sorted_versions]
def resolve_to_specific_version(requested_range, available_versions):
max_version = None
max_version_string = None
for version_string in available_versions:
version = VersionSpecifier.from_version_string(version_string)
if(versions_compatible(version,
requested_range.start, requested_range.end) and
(max_version is None or max_version.compare(version) < 0)):
max_version = version
max_version_string = version_string
return max_version_string
def filter_installable(
versions: List[str],
install_prerelease: bool
) -> List[str]:
installable = []
installable_dict = {}
for version_string in versions:
version = VersionSpecifier.from_version_string(version_string)
if install_prerelease or not version.prerelease:
installable.append(version)
installable_dict[str(version)] = version_string
sorted_installable = sorted(installable)
sorted_installable_original_versions = [
str(installable_dict.get(str(version))) for version in sorted_installable
]
return sorted_installable_original_versions