diff -r ffa851df0825 -r 2fb8b9db1c86 symbian-qemu-0.9.1-12/python-2.6.1/Lib/distutils/versionpredicate.py --- /dev/null Thu Jan 01 00:00:00 1970 +0000 +++ b/symbian-qemu-0.9.1-12/python-2.6.1/Lib/distutils/versionpredicate.py Fri Jul 31 15:01:17 2009 +0100 @@ -0,0 +1,164 @@ +"""Module for parsing and testing package version predicate strings. +""" +import re +import distutils.version +import operator + + +re_validPackage = re.compile(r"(?i)^\s*([a-z_]\w*(?:\.[a-z_]\w*)*)(.*)") +# (package) (rest) + +re_paren = re.compile(r"^\s*\((.*)\)\s*$") # (list) inside of parentheses +re_splitComparison = re.compile(r"^\s*(<=|>=|<|>|!=|==)\s*([^\s,]+)\s*$") +# (comp) (version) + + +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. + """ + # Fields: + # name: package name + # pred: list of (comparison string, StrictVersion) + + 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() + if paren: + match = re_paren.match(paren) + if not match: + raise ValueError("expected parenthesized list: %r" % paren) + str = match.groups()[0] + self.pred = [splitUp(aPred) for aPred in str.split(",")] + if not self.pred: + raise ValueError("empty parenthesized list in %r" + % versionPredicateStr) + else: + self.pred = [] + + def __str__(self): + if self.pred: + seq = [cond + " " + str(ver) for cond, ver in self.pred] + return self.name + " (" + ", ".join(seq) + ")" + else: + return self.name + + 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 + 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) + ver = m.group(2) or None + if ver: + ver = distutils.version.StrictVersion(ver) + return m.group(1), ver