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Diffstat (limited to 'lib/spack/external/py/_path/common.py')
| -rw-r--r-- | lib/spack/external/py/_path/common.py | 439 |
1 files changed, 439 insertions, 0 deletions
diff --git a/lib/spack/external/py/_path/common.py b/lib/spack/external/py/_path/common.py new file mode 100644 index 0000000000..bf42ed5092 --- /dev/null +++ b/lib/spack/external/py/_path/common.py @@ -0,0 +1,439 @@ +""" +""" +import os, sys, posixpath +import py + +# Moved from local.py. +iswin32 = sys.platform == "win32" or (getattr(os, '_name', False) == 'nt') + +try: + from os import fspath +except ImportError: + def fspath(path): + """ + Return the string representation of the path. + If str or bytes is passed in, it is returned unchanged. + This code comes from PEP 519, modified to support earlier versions of + python. + + This is required for python < 3.6. + """ + if isinstance(path, (py.builtin.text, py.builtin.bytes)): + return path + + # Work from the object's type to match method resolution of other magic + # methods. + path_type = type(path) + try: + return path_type.__fspath__(path) + except AttributeError: + if hasattr(path_type, '__fspath__'): + raise + try: + import pathlib + except ImportError: + pass + else: + if isinstance(path, pathlib.PurePath): + return py.builtin.text(path) + + raise TypeError("expected str, bytes or os.PathLike object, not " + + path_type.__name__) + +class Checkers: + _depend_on_existence = 'exists', 'link', 'dir', 'file' + + def __init__(self, path): + self.path = path + + def dir(self): + raise NotImplementedError + + def file(self): + raise NotImplementedError + + def dotfile(self): + return self.path.basename.startswith('.') + + def ext(self, arg): + if not arg.startswith('.'): + arg = '.' + arg + return self.path.ext == arg + + def exists(self): + raise NotImplementedError + + def basename(self, arg): + return self.path.basename == arg + + def basestarts(self, arg): + return self.path.basename.startswith(arg) + + def relto(self, arg): + return self.path.relto(arg) + + def fnmatch(self, arg): + return self.path.fnmatch(arg) + + def endswith(self, arg): + return str(self.path).endswith(arg) + + def _evaluate(self, kw): + for name, value in kw.items(): + invert = False + meth = None + try: + meth = getattr(self, name) + except AttributeError: + if name[:3] == 'not': + invert = True + try: + meth = getattr(self, name[3:]) + except AttributeError: + pass + if meth is None: + raise TypeError( + "no %r checker available for %r" % (name, self.path)) + try: + if py.code.getrawcode(meth).co_argcount > 1: + if (not meth(value)) ^ invert: + return False + else: + if bool(value) ^ bool(meth()) ^ invert: + return False + except (py.error.ENOENT, py.error.ENOTDIR, py.error.EBUSY): + # EBUSY feels not entirely correct, + # but its kind of necessary since ENOMEDIUM + # is not accessible in python + for name in self._depend_on_existence: + if name in kw: + if kw.get(name): + return False + name = 'not' + name + if name in kw: + if not kw.get(name): + return False + return True + +class NeverRaised(Exception): + pass + +class PathBase(object): + """ shared implementation for filesystem path objects.""" + Checkers = Checkers + + def __div__(self, other): + return self.join(fspath(other)) + __truediv__ = __div__ # py3k + + def basename(self): + """ basename part of path. """ + return self._getbyspec('basename')[0] + basename = property(basename, None, None, basename.__doc__) + + def dirname(self): + """ dirname part of path. """ + return self._getbyspec('dirname')[0] + dirname = property(dirname, None, None, dirname.__doc__) + + def purebasename(self): + """ pure base name of the path.""" + return self._getbyspec('purebasename')[0] + purebasename = property(purebasename, None, None, purebasename.__doc__) + + def ext(self): + """ extension of the path (including the '.').""" + return self._getbyspec('ext')[0] + ext = property(ext, None, None, ext.__doc__) + + def dirpath(self, *args, **kwargs): + """ return the directory path joined with any given path arguments. """ + return self.new(basename='').join(*args, **kwargs) + + def read_binary(self): + """ read and return a bytestring from reading the path. """ + with self.open('rb') as f: + return f.read() + + def read_text(self, encoding): + """ read and return a Unicode string from reading the path. """ + with self.open("r", encoding=encoding) as f: + return f.read() + + + def read(self, mode='r'): + """ read and return a bytestring from reading the path. """ + with self.open(mode) as f: + return f.read() + + def readlines(self, cr=1): + """ read and return a list of lines from the path. if cr is False, the +newline will be removed from the end of each line. """ + if not cr: + content = self.read('rU') + return content.split('\n') + else: + f = self.open('rU') + try: + return f.readlines() + finally: + f.close() + + def load(self): + """ (deprecated) return object unpickled from self.read() """ + f = self.open('rb') + try: + return py.error.checked_call(py.std.pickle.load, f) + finally: + f.close() + + def move(self, target): + """ move this path to target. """ + if target.relto(self): + raise py.error.EINVAL(target, + "cannot move path into a subdirectory of itself") + try: + self.rename(target) + except py.error.EXDEV: # invalid cross-device link + self.copy(target) + self.remove() + + def __repr__(self): + """ return a string representation of this path. """ + return repr(str(self)) + + def check(self, **kw): + """ check a path for existence and properties. + + Without arguments, return True if the path exists, otherwise False. + + valid checkers:: + + file=1 # is a file + file=0 # is not a file (may not even exist) + dir=1 # is a dir + link=1 # is a link + exists=1 # exists + + You can specify multiple checker definitions, for example:: + + path.check(file=1, link=1) # a link pointing to a file + """ + if not kw: + kw = {'exists' : 1} + return self.Checkers(self)._evaluate(kw) + + def fnmatch(self, pattern): + """return true if the basename/fullname matches the glob-'pattern'. + + valid pattern characters:: + + * matches everything + ? matches any single character + [seq] matches any character in seq + [!seq] matches any char not in seq + + If the pattern contains a path-separator then the full path + is used for pattern matching and a '*' is prepended to the + pattern. + + if the pattern doesn't contain a path-separator the pattern + is only matched against the basename. + """ + return FNMatcher(pattern)(self) + + def relto(self, relpath): + """ return a string which is the relative part of the path + to the given 'relpath'. + """ + if not isinstance(relpath, (str, PathBase)): + raise TypeError("%r: not a string or path object" %(relpath,)) + strrelpath = str(relpath) + if strrelpath and strrelpath[-1] != self.sep: + strrelpath += self.sep + #assert strrelpath[-1] == self.sep + #assert strrelpath[-2] != self.sep + strself = self.strpath + if sys.platform == "win32" or getattr(os, '_name', None) == 'nt': + if os.path.normcase(strself).startswith( + os.path.normcase(strrelpath)): + return strself[len(strrelpath):] + elif strself.startswith(strrelpath): + return strself[len(strrelpath):] + return "" + + def ensure_dir(self, *args): + """ ensure the path joined with args is a directory. """ + return self.ensure(*args, **{"dir": True}) + + def bestrelpath(self, dest): + """ return a string which is a relative path from self + (assumed to be a directory) to dest such that + self.join(bestrelpath) == dest and if not such + path can be determined return dest. + """ + try: + if self == dest: + return os.curdir + base = self.common(dest) + if not base: # can be the case on windows + return str(dest) + self2base = self.relto(base) + reldest = dest.relto(base) + if self2base: + n = self2base.count(self.sep) + 1 + else: + n = 0 + l = [os.pardir] * n + if reldest: + l.append(reldest) + target = dest.sep.join(l) + return target + except AttributeError: + return str(dest) + + def exists(self): + return self.check() + + def isdir(self): + return self.check(dir=1) + + def isfile(self): + return self.check(file=1) + + def parts(self, reverse=False): + """ return a root-first list of all ancestor directories + plus the path itself. + """ + current = self + l = [self] + while 1: + last = current + current = current.dirpath() + if last == current: + break + l.append(current) + if not reverse: + l.reverse() + return l + + def common(self, other): + """ return the common part shared with the other path + or None if there is no common part. + """ + last = None + for x, y in zip(self.parts(), other.parts()): + if x != y: + return last + last = x + return last + + def __add__(self, other): + """ return new path object with 'other' added to the basename""" + return self.new(basename=self.basename+str(other)) + + def __cmp__(self, other): + """ return sort value (-1, 0, +1). """ + try: + return cmp(self.strpath, other.strpath) + except AttributeError: + return cmp(str(self), str(other)) # self.path, other.path) + + def __lt__(self, other): + try: + return self.strpath < other.strpath + except AttributeError: + return str(self) < str(other) + + def visit(self, fil=None, rec=None, ignore=NeverRaised, bf=False, sort=False): + """ yields all paths below the current one + + fil is a filter (glob pattern or callable), if not matching the + path will not be yielded, defaulting to None (everything is + returned) + + rec is a filter (glob pattern or callable) that controls whether + a node is descended, defaulting to None + + ignore is an Exception class that is ignoredwhen calling dirlist() + on any of the paths (by default, all exceptions are reported) + + bf if True will cause a breadthfirst search instead of the + default depthfirst. Default: False + + sort if True will sort entries within each directory level. + """ + for x in Visitor(fil, rec, ignore, bf, sort).gen(self): + yield x + + def _sortlist(self, res, sort): + if sort: + if hasattr(sort, '__call__'): + res.sort(sort) + else: + res.sort() + + def samefile(self, other): + """ return True if other refers to the same stat object as self. """ + return self.strpath == str(other) + + def __fspath__(self): + return str(self) + +class Visitor: + def __init__(self, fil, rec, ignore, bf, sort): + if isinstance(fil, py.builtin._basestring): + fil = FNMatcher(fil) + if isinstance(rec, py.builtin._basestring): + self.rec = FNMatcher(rec) + elif not hasattr(rec, '__call__') and rec: + self.rec = lambda path: True + else: + self.rec = rec + self.fil = fil + self.ignore = ignore + self.breadthfirst = bf + self.optsort = sort and sorted or (lambda x: x) + + def gen(self, path): + try: + entries = path.listdir() + except self.ignore: + return + rec = self.rec + dirs = self.optsort([p for p in entries + if p.check(dir=1) and (rec is None or rec(p))]) + if not self.breadthfirst: + for subdir in dirs: + for p in self.gen(subdir): + yield p + for p in self.optsort(entries): + if self.fil is None or self.fil(p): + yield p + if self.breadthfirst: + for subdir in dirs: + for p in self.gen(subdir): + yield p + +class FNMatcher: + def __init__(self, pattern): + self.pattern = pattern + + def __call__(self, path): + pattern = self.pattern + + if (pattern.find(path.sep) == -1 and + iswin32 and + pattern.find(posixpath.sep) != -1): + # Running on Windows, the pattern has no Windows path separators, + # and the pattern has one or more Posix path separators. Replace + # the Posix path separators with the Windows path separator. + pattern = pattern.replace(posixpath.sep, path.sep) + + if pattern.find(path.sep) == -1: + name = path.basename + else: + name = str(path) # path.strpath # XXX svn? + if not os.path.isabs(pattern): + pattern = '*' + path.sep + pattern + return py.std.fnmatch.fnmatch(name, pattern) |