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| """Filename globbing utility.""" | |
| import os | |
| import re | |
| import fnmatch | |
| import itertools | |
| import stat | |
| import sys | |
| __all__ = ["glob", "iglob", "escape"] | |
| def glob(pathname, *, root_dir=None, dir_fd=None, recursive=False): | |
| """Return a list of paths matching a pathname pattern. | |
| The pattern may contain simple shell-style wildcards a la | |
| fnmatch. However, unlike fnmatch, filenames starting with a | |
| dot are special cases that are not matched by '*' and '?' | |
| patterns. | |
| If recursive is true, the pattern '**' will match any files and | |
| zero or more directories and subdirectories. | |
| """ | |
| return list(iglob(pathname, root_dir=root_dir, dir_fd=dir_fd, recursive=recursive)) | |
| def iglob(pathname, *, root_dir=None, dir_fd=None, recursive=False): | |
| """Return an iterator which yields the paths matching a pathname pattern. | |
| The pattern may contain simple shell-style wildcards a la | |
| fnmatch. However, unlike fnmatch, filenames starting with a | |
| dot are special cases that are not matched by '*' and '?' | |
| patterns. | |
| If recursive is true, the pattern '**' will match any files and | |
| zero or more directories and subdirectories. | |
| """ | |
| sys.audit("glob.glob", pathname, recursive) | |
| sys.audit("glob.glob/2", pathname, recursive, root_dir, dir_fd) | |
| if root_dir is not None: | |
| root_dir = os.fspath(root_dir) | |
| else: | |
| root_dir = pathname[:0] | |
| it = _iglob(pathname, root_dir, dir_fd, recursive, False) | |
| if not pathname or recursive and _isrecursive(pathname[:2]): | |
| try: | |
| s = next(it) # skip empty string | |
| if s: | |
| it = itertools.chain((s,), it) | |
| except StopIteration: | |
| pass | |
| return it | |
| def _iglob(pathname, root_dir, dir_fd, recursive, dironly): | |
| dirname, basename = os.path.split(pathname) | |
| if not has_magic(pathname): | |
| assert not dironly | |
| if basename: | |
| if _lexists(_join(root_dir, pathname), dir_fd): | |
| yield pathname | |
| else: | |
| # Patterns ending with a slash should match only directories | |
| if _isdir(_join(root_dir, dirname), dir_fd): | |
| yield pathname | |
| return | |
| if not dirname: | |
| if recursive and _isrecursive(basename): | |
| yield from _glob2(root_dir, basename, dir_fd, dironly) | |
| else: | |
| yield from _glob1(root_dir, basename, dir_fd, dironly) | |
| return | |
| # `os.path.split()` returns the argument itself as a dirname if it is a | |
| # drive or UNC path. Prevent an infinite recursion if a drive or UNC path | |
| # contains magic characters (i.e. r'\\?\C:'). | |
| if dirname != pathname and has_magic(dirname): | |
| dirs = _iglob(dirname, root_dir, dir_fd, recursive, True) | |
| else: | |
| dirs = [dirname] | |
| if has_magic(basename): | |
| if recursive and _isrecursive(basename): | |
| glob_in_dir = _glob2 | |
| else: | |
| glob_in_dir = _glob1 | |
| else: | |
| glob_in_dir = _glob0 | |
| for dirname in dirs: | |
| for name in glob_in_dir(_join(root_dir, dirname), basename, dir_fd, dironly): | |
| yield os.path.join(dirname, name) | |
| # These 2 helper functions non-recursively glob inside a literal directory. | |
| # They return a list of basenames. _glob1 accepts a pattern while _glob0 | |
| # takes a literal basename (so it only has to check for its existence). | |
| def _glob1(dirname, pattern, dir_fd, dironly): | |
| names = list(_iterdir(dirname, dir_fd, dironly)) | |
| if not _ishidden(pattern): | |
| names = (x for x in names if not _ishidden(x)) | |
| return fnmatch.filter(names, pattern) | |
| def _glob0(dirname, basename, dir_fd, dironly): | |
| if basename: | |
| if _lexists(_join(dirname, basename), dir_fd): | |
| return [basename] | |
| else: | |
| # `os.path.split()` returns an empty basename for paths ending with a | |
| # directory separator. 'q*x/' should match only directories. | |
| if _isdir(dirname, dir_fd): | |
| return [basename] | |
| return [] | |
| # Following functions are not public but can be used by third-party code. | |
| def glob0(dirname, pattern): | |
| return _glob0(dirname, pattern, None, False) | |
| def glob1(dirname, pattern): | |
| return _glob1(dirname, pattern, None, False) | |
| # This helper function recursively yields relative pathnames inside a literal | |
| # directory. | |
| def _glob2(dirname, pattern, dir_fd, dironly): | |
| assert _isrecursive(pattern) | |
| yield pattern[:0] | |
| yield from _rlistdir(dirname, dir_fd, dironly) | |
| # If dironly is false, yields all file names inside a directory. | |
| # If dironly is true, yields only directory names. | |
| def _iterdir(dirname, dir_fd, dironly): | |
| try: | |
| fd = None | |
| fsencode = None | |
| if dir_fd is not None: | |
| if dirname: | |
| fd = arg = os.open(dirname, _dir_open_flags, dir_fd=dir_fd) | |
| else: | |
| arg = dir_fd | |
| if isinstance(dirname, bytes): | |
| fsencode = os.fsencode | |
| elif dirname: | |
| arg = dirname | |
| elif isinstance(dirname, bytes): | |
| arg = bytes(os.curdir, 'ASCII') | |
| else: | |
| arg = os.curdir | |
| try: | |
| with os.scandir(arg) as it: | |
| for entry in it: | |
| try: | |
| if not dironly or entry.is_dir(): | |
| if fsencode is not None: | |
| yield fsencode(entry.name) | |
| else: | |
| yield entry.name | |
| except OSError: | |
| pass | |
| finally: | |
| if fd is not None: | |
| os.close(fd) | |
| except OSError: | |
| return | |
| # Recursively yields relative pathnames inside a literal directory. | |
| def _rlistdir(dirname, dir_fd, dironly): | |
| names = list(_iterdir(dirname, dir_fd, dironly)) | |
| for x in names: | |
| if not _ishidden(x): | |
| yield x | |
| path = _join(dirname, x) if dirname else x | |
| for y in _rlistdir(path, dir_fd, dironly): | |
| yield _join(x, y) | |
| def _lexists(pathname, dir_fd): | |
| # Same as os.path.lexists(), but with dir_fd | |
| if dir_fd is None: | |
| return os.path.lexists(pathname) | |
| try: | |
| os.lstat(pathname, dir_fd=dir_fd) | |
| except (OSError, ValueError): | |
| return False | |
| else: | |
| return True | |
| def _isdir(pathname, dir_fd): | |
| # Same as os.path.isdir(), but with dir_fd | |
| if dir_fd is None: | |
| return os.path.isdir(pathname) | |
| try: | |
| st = os.stat(pathname, dir_fd=dir_fd) | |
| except (OSError, ValueError): | |
| return False | |
| else: | |
| return stat.S_ISDIR(st.st_mode) | |
| def _join(dirname, basename): | |
| # It is common if dirname or basename is empty | |
| if not dirname or not basename: | |
| return dirname or basename | |
| return os.path.join(dirname, basename) | |
| magic_check = re.compile('([*?[])') | |
| magic_check_bytes = re.compile(b'([*?[])') | |
| def has_magic(s): | |
| if isinstance(s, bytes): | |
| match = magic_check_bytes.search(s) | |
| else: | |
| match = magic_check.search(s) | |
| return match is not None | |
| def _ishidden(path): | |
| return path[0] in ('.', b'.'[0]) | |
| def _isrecursive(pattern): | |
| if isinstance(pattern, bytes): | |
| return pattern == b'**' | |
| else: | |
| return pattern == '**' | |
| def escape(pathname): | |
| """Escape all special characters. | |
| """ | |
| # Escaping is done by wrapping any of "*?[" between square brackets. | |
| # Metacharacters do not work in the drive part and shouldn't be escaped. | |
| drive, pathname = os.path.splitdrive(pathname) | |
| if isinstance(pathname, bytes): | |
| pathname = magic_check_bytes.sub(br'[\1]', pathname) | |
| else: | |
| pathname = magic_check.sub(r'[\1]', pathname) | |
| return drive + pathname | |
| _dir_open_flags = os.O_RDONLY | getattr(os, 'O_DIRECTORY', 0) |