forked from mrlan/EnglishPal
166 lines
4.7 KiB
Python
166 lines
4.7 KiB
Python
"""
|
|
Filename globbing utility. Mostly a copy of `glob` from Python 3.5.
|
|
|
|
Changes include:
|
|
* `yield from` and PEP3102 `*` removed.
|
|
* Hidden files are not ignored.
|
|
"""
|
|
|
|
import os
|
|
import re
|
|
import fnmatch
|
|
|
|
__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.
|
|
"""
|
|
it = _iglob(pathname, recursive)
|
|
if recursive and _isrecursive(pathname):
|
|
s = next(it) # skip empty string
|
|
assert not s
|
|
return it
|
|
|
|
|
|
def _iglob(pathname, recursive):
|
|
dirname, basename = os.path.split(pathname)
|
|
glob_in_dir = glob2 if recursive and _isrecursive(basename) else glob1
|
|
|
|
if not has_magic(pathname):
|
|
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:
|
|
yield from glob_in_dir(dirname, basename)
|
|
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)
|
|
else:
|
|
dirs = [dirname]
|
|
if not has_magic(basename):
|
|
glob_in_dir = glob0
|
|
for dirname in dirs:
|
|
for name in glob_in_dir(dirname, basename):
|
|
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):
|
|
if not dirname:
|
|
if isinstance(pattern, bytes):
|
|
dirname = os.curdir.encode('ASCII')
|
|
else:
|
|
dirname = os.curdir
|
|
try:
|
|
names = os.listdir(dirname)
|
|
except OSError:
|
|
return []
|
|
return fnmatch.filter(names, pattern)
|
|
|
|
|
|
def glob0(dirname, basename):
|
|
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 []
|
|
|
|
|
|
# This helper function recursively yields relative pathnames inside a literal
|
|
# directory.
|
|
|
|
|
|
def glob2(dirname, pattern):
|
|
assert _isrecursive(pattern)
|
|
yield pattern[:0]
|
|
yield from _rlistdir(dirname)
|
|
|
|
|
|
# Recursively yields relative pathnames inside a literal directory.
|
|
def _rlistdir(dirname):
|
|
if not dirname:
|
|
if isinstance(dirname, bytes):
|
|
dirname = os.curdir.encode('ASCII')
|
|
else:
|
|
dirname = os.curdir
|
|
try:
|
|
names = os.listdir(dirname)
|
|
except OSError:
|
|
return
|
|
for x in names:
|
|
yield x
|
|
path = os.path.join(dirname, x) if dirname else x
|
|
for y in _rlistdir(path):
|
|
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 _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(rb'[\1]', pathname)
|
|
else:
|
|
pathname = magic_check.sub(r'[\1]', pathname)
|
|
return drive + pathname
|