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cpython/Lib/glob.py /
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| """Filename globbing utility.""" | |
| import contextlib | |
| import os | |
| import re | |
| import fnmatch | |
| import sys | |
| __all__ = ["glob", "iglob", "escape"] | |
| def glob(pathname, *, 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, recursive=recursive)) | |
| def iglob(pathname, *, 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) | |
| it = _iglob(pathname, recursive, False) | |
| if recursive and _isrecursive(pathname): | |
| s = next(it) # skip empty string | |
| assert not s | |
| return it | |
| def _iglob(pathname, recursive, dironly): | |
| dirname, basename = os.path.split(pathname) | |
| if not has_magic(pathname): | |
| assert not dironly | |
| if basename: | |
| if os.path.lexists(pathname): | |
| yield pathname | |
| else: | |
| # Patterns ending with a slash should match only directories | |
| if os.path.isdir(dirname): | |
| yield pathname | |
| return | |
| if not dirname: | |
| if recursive and _isrecursive(basename): | |
| yield from _glob2(dirname, basename, dironly) | |
| else: | |
| yield from _glob1(dirname, basename, 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, 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(dirname, basename, 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, dironly): | |
| names = _listdir(dirname, dironly) | |
| if not _ishidden(pattern): | |
| names = (x for x in names if not _ishidden(x)) | |
| return fnmatch.filter(names, pattern) | |
| def _glob0(dirname, basename, dironly): | |
| if not basename: | |
| # `os.path.split()` returns an empty basename for paths ending with a | |
| # directory separator. 'q*x/' should match only directories. | |
| if os.path.isdir(dirname): | |
| return [basename] | |
| else: | |
| if os.path.lexists(os.path.join(dirname, basename)): | |
| return [basename] | |
| return [] | |
| # Following functions are not public but can be used by third-party code. | |
| def glob0(dirname, pattern): | |
| return _glob0(dirname, pattern, False) | |
| def glob1(dirname, pattern): | |
| return _glob1(dirname, pattern, False) | |
| # This helper function recursively yields relative pathnames inside a literal | |
| # directory. | |
| def _glob2(dirname, pattern, dironly): | |
| assert _isrecursive(pattern) | |
| yield pattern[:0] | |
| yield from _rlistdir(dirname, dironly) | |
| # If dironly is false, yields all file names inside a directory. | |
| # If dironly is true, yields only directory names. | |
| def _iterdir(dirname, dironly): | |
| if not dirname: | |
| if isinstance(dirname, bytes): | |
| dirname = bytes(os.curdir, 'ASCII') | |
| else: | |
| dirname = os.curdir | |
| try: | |
| with os.scandir(dirname) as it: | |
| for entry in it: | |
| try: | |
| if not dironly or entry.is_dir(): | |
| yield entry.name | |
| except OSError: | |
| pass | |
| except OSError: | |
| return | |
| def _listdir(dirname, dironly): | |
| with contextlib.closing(_iterdir(dirname, dironly)) as it: | |
| return list(it) | |
| # Recursively yields relative pathnames inside a literal directory. | |
| def _rlistdir(dirname, dironly): | |
| names = _listdir(dirname, dironly) | |
| for x in names: | |
| if not _ishidden(x): | |
| yield x | |
| path = os.path.join(dirname, x) if dirname else x | |
| for y in _rlistdir(path, dironly): | |
| yield os.path.join(x, y) | |
| 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 |