summaryrefslogtreecommitdiffstats
path: root/Lib/glob.py
blob: 9529f7e2ee5fcd6baa1b7b5cc245492497c69e12 (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
"""Filename globbing utility."""

import sys
import os
import re
import fnmatch

__all__ = ["glob", "iglob"]

def glob(pathname):
    """Return a list of paths matching a pathname pattern.

    The pattern may contain simple shell-style wildcards a la fnmatch.

    """
    return list(iglob(pathname))

def iglob(pathname):
    """Return a list of paths matching a pathname pattern.

    The pattern may contain simple shell-style wildcards a la fnmatch.

    """
    if not has_magic(pathname):
        if os.path.lexists(pathname):
            yield pathname
        return
    dirname, basename = os.path.split(pathname)
    if not dirname:
        for name in glob1(None, basename):
            yield name
        return
    if has_magic(dirname):
        dirs = iglob(dirname)
    else:
        dirs = [dirname]
    if has_magic(basename):
        glob_in_dir = glob1
    else:
        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 = bytes(os.curdir, 'ASCII')
        else:
            dirname = os.curdir
    try:
        names = os.listdir(dirname)
    except os.error:
        return []
    if pattern[0] != '.':
        names = [x for x in names if x[0] != '.']
    return fnmatch.filter(names, pattern)

def glob0(dirname, basename):
    if 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 []


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