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- # Source Generated with Decompyle++
- # File: in.pyc (Python 2.5)
-
- '''Module for parsing and testing package version predicate strings.
- '''
- import re
- import distutils.version as distutils
- import operator
- re_validPackage = re.compile('(?i)^\\s*([a-z_]\\w*(?:\\.[a-z_]\\w*)*)(.*)')
- re_paren = re.compile('^\\s*\\((.*)\\)\\s*$')
- re_splitComparison = re.compile('^\\s*(<=|>=|<|>|!=|==)\\s*([^\\s,]+)\\s*$')
-
- def splitUp(pred):
- '''Parse a single version comparison.
-
- Return (comparison string, StrictVersion)
- '''
- res = re_splitComparison.match(pred)
- if not res:
- raise ValueError('bad package restriction syntax: %r' % pred)
-
- (comp, verStr) = res.groups()
- return (comp, distutils.version.StrictVersion(verStr))
-
- compmap = {
- '<': operator.lt,
- '<=': operator.le,
- '==': operator.eq,
- '>': operator.gt,
- '>=': operator.ge,
- '!=': operator.ne }
-
- class VersionPredicate:
- """Parse and test package version predicates.
-
- >>> v = VersionPredicate('pyepat.abc (>1.0, <3333.3a1, !=1555.1b3)')
-
- The `name` attribute provides the full dotted name that is given::
-
- >>> v.name
- 'pyepat.abc'
-
- The str() of a `VersionPredicate` provides a normalized
- human-readable version of the expression::
-
- >>> print v
- pyepat.abc (> 1.0, < 3333.3a1, != 1555.1b3)
-
- The `satisfied_by()` method can be used to determine with a given
- version number is included in the set described by the version
- restrictions::
-
- >>> v.satisfied_by('1.1')
- True
- >>> v.satisfied_by('1.4')
- True
- >>> v.satisfied_by('1.0')
- False
- >>> v.satisfied_by('4444.4')
- False
- >>> v.satisfied_by('1555.1b3')
- False
-
- `VersionPredicate` is flexible in accepting extra whitespace::
-
- >>> v = VersionPredicate(' pat( == 0.1 ) ')
- >>> v.name
- 'pat'
- >>> v.satisfied_by('0.1')
- True
- >>> v.satisfied_by('0.2')
- False
-
- If any version numbers passed in do not conform to the
- restrictions of `StrictVersion`, a `ValueError` is raised::
-
- >>> v = VersionPredicate('p1.p2.p3.p4(>=1.0, <=1.3a1, !=1.2zb3)')
- Traceback (most recent call last):
- ...
- ValueError: invalid version number '1.2zb3'
-
- It the module or package name given does not conform to what's
- allowed as a legal module or package name, `ValueError` is
- raised::
-
- >>> v = VersionPredicate('foo-bar')
- Traceback (most recent call last):
- ...
- ValueError: expected parenthesized list: '-bar'
-
- >>> v = VersionPredicate('foo bar (12.21)')
- Traceback (most recent call last):
- ...
- ValueError: expected parenthesized list: 'bar (12.21)'
-
- """
-
- def __init__(self, versionPredicateStr):
- '''Parse a version predicate string.
- '''
- versionPredicateStr = versionPredicateStr.strip()
- if not versionPredicateStr:
- raise ValueError('empty package restriction')
-
- match = re_validPackage.match(versionPredicateStr)
- if not match:
- raise ValueError('bad package name in %r' % versionPredicateStr)
-
- (self.name, paren) = match.groups()
- paren = paren.strip()
-
-
- def __str__(self):
- pass
-
-
- def satisfied_by(self, version):
- '''True if version is compatible with all the predicates in self.
- The parameter version must be acceptable to the StrictVersion
- constructor. It may be either a string or StrictVersion.
- '''
- for cond, ver in self.pred:
- if not compmap[cond](version, ver):
- return False
- continue
-
- return True
-
-
- _provision_rx = None
-
- def split_provision(value):
- """Return the name and optional version number of a provision.
-
- The version number, if given, will be returned as a `StrictVersion`
- instance, otherwise it will be `None`.
-
- >>> split_provision('mypkg')
- ('mypkg', None)
- >>> split_provision(' mypkg( 1.2 ) ')
- ('mypkg', StrictVersion ('1.2'))
- """
- global _provision_rx
- if _provision_rx is None:
- _provision_rx = re.compile('([a-zA-Z_]\\w*(?:\\.[a-zA-Z_]\\w*)*)(?:\\s*\\(\\s*([^)\\s]+)\\s*\\))?$')
-
- value = value.strip()
- m = _provision_rx.match(value)
- if not m:
- raise ValueError('illegal provides specification: %r' % value)
-
- if not m.group(2):
- pass
- ver = None
- if ver:
- ver = distutils.version.StrictVersion(ver)
-
- return (m.group(1), ver)
-
-