mirror of
https://github.com/python/cpython.git
synced 2024-11-24 17:47:13 +01:00
252 lines
8.5 KiB
Python
252 lines
8.5 KiB
Python
"""Filename globbing utility."""
|
|
|
|
import contextlib
|
|
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,
|
|
include_hidden=False):
|
|
"""Return a list of paths matching a pathname pattern.
|
|
|
|
The pattern may contain simple shell-style wildcards a la
|
|
fnmatch. Unlike fnmatch, filenames starting with a
|
|
dot are special cases that are not matched by '*' and '?'
|
|
patterns by default.
|
|
|
|
If `include_hidden` is true, the patterns '*', '?', '**' will match hidden
|
|
directories.
|
|
|
|
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,
|
|
include_hidden=include_hidden))
|
|
|
|
def iglob(pathname, *, root_dir=None, dir_fd=None, recursive=False,
|
|
include_hidden=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,
|
|
include_hidden=include_hidden)
|
|
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,
|
|
include_hidden=False):
|
|
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,
|
|
include_hidden=include_hidden)
|
|
else:
|
|
yield from _glob1(root_dir, basename, dir_fd, dironly,
|
|
include_hidden=include_hidden)
|
|
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,
|
|
include_hidden=include_hidden)
|
|
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,
|
|
include_hidden=include_hidden):
|
|
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, include_hidden=False):
|
|
names = _listdir(dirname, dir_fd, dironly)
|
|
if include_hidden or not _ishidden(pattern):
|
|
names = (x for x in names if include_hidden or not _ishidden(x))
|
|
return fnmatch.filter(names, pattern)
|
|
|
|
def _glob0(dirname, basename, dir_fd, dironly, include_hidden=False):
|
|
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, include_hidden=False):
|
|
assert _isrecursive(pattern)
|
|
yield pattern[:0]
|
|
yield from _rlistdir(dirname, dir_fd, dironly,
|
|
include_hidden=include_hidden)
|
|
|
|
# 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
|
|
|
|
def _listdir(dirname, dir_fd, dironly):
|
|
with contextlib.closing(_iterdir(dirname, dir_fd, dironly)) as it:
|
|
return list(it)
|
|
|
|
# Recursively yields relative pathnames inside a literal directory.
|
|
def _rlistdir(dirname, dir_fd, dironly, include_hidden=False):
|
|
names = _listdir(dirname, dir_fd, dironly)
|
|
for x in names:
|
|
if include_hidden or not _ishidden(x):
|
|
yield x
|
|
path = _join(dirname, x) if dirname else x
|
|
for y in _rlistdir(path, dir_fd, dironly,
|
|
include_hidden=include_hidden):
|
|
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)
|