88 lines
3.8 KiB
Python
88 lines
3.8 KiB
Python
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# coding: utf-8
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# patterns.py: Common wildcard searching/filtering functionality for files.
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#
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# Copyright (C) 2010 Yesudeep Mangalapilly <yesudeep@gmail.com>
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#
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# Written by Boris Staletic <boris.staletic@gmail.com>
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# Non-pure path objects are only allowed on their respective OS's.
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# Thus, these utilities require "pure" path objects that don't access the filesystem.
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# Since pathlib doesn't have a `case_sensitive` parameter, we have to approximate it
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# by converting input paths to `PureWindowsPath` and `PurePosixPath` where:
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# - `PureWindowsPath` is always case-insensitive.
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# - `PurePosixPath` is always case-sensitive.
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# Reference: https://docs.python.org/3/library/pathlib.html#pathlib.PurePath.match
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from pathlib import PureWindowsPath, PurePosixPath
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def _match_path(path, included_patterns, excluded_patterns, case_sensitive):
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"""Internal function same as :func:`match_path` but does not check arguments."""
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if case_sensitive:
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path = PurePosixPath(path)
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else:
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included_patterns = {pattern.lower() for pattern in included_patterns}
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excluded_patterns = {pattern.lower() for pattern in excluded_patterns}
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path = PureWindowsPath(path)
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common_patterns = included_patterns & excluded_patterns
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if common_patterns:
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raise ValueError('conflicting patterns `{}` included and excluded'.format(common_patterns))
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return (any(path.match(p) for p in included_patterns)
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and not any(path.match(p) for p in excluded_patterns))
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def filter_paths(paths, included_patterns=None, excluded_patterns=None, case_sensitive=True):
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"""
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Filters from a set of paths based on acceptable patterns and
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ignorable patterns.
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:param pathnames:
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A list of path names that will be filtered based on matching and
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ignored patterns.
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:param included_patterns:
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Allow filenames matching wildcard patterns specified in this list.
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If no pattern list is specified, ["*"] is used as the default pattern,
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which matches all files.
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:param excluded_patterns:
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Ignores filenames matching wildcard patterns specified in this list.
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If no pattern list is specified, no files are ignored.
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:param case_sensitive:
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``True`` if matching should be case-sensitive; ``False`` otherwise.
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:returns:
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A list of pathnames that matched the allowable patterns and passed
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through the ignored patterns.
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"""
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included = ["*"] if included_patterns is None else included_patterns
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excluded = [] if excluded_patterns is None else excluded_patterns
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for path in paths:
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if _match_path(path, set(included), set(excluded), case_sensitive):
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yield path
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def match_any_paths(paths, included_patterns=None, excluded_patterns=None, case_sensitive=True):
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"""
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Matches from a set of paths based on acceptable patterns and
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ignorable patterns.
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:param pathnames:
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A list of path names that will be filtered based on matching and
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ignored patterns.
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:param included_patterns:
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Allow filenames matching wildcard patterns specified in this list.
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If no pattern list is specified, ["*"] is used as the default pattern,
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which matches all files.
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:param excluded_patterns:
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Ignores filenames matching wildcard patterns specified in this list.
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If no pattern list is specified, no files are ignored.
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:param case_sensitive:
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``True`` if matching should be case-sensitive; ``False`` otherwise.
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:returns:
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``True`` if any of the paths matches; ``False`` otherwise.
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"""
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included = ["*"] if included_patterns is None else included_patterns
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excluded = [] if excluded_patterns is None else excluded_patterns
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for path in paths:
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if _match_path(path, set(included), set(excluded), case_sensitive):
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return True
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return False
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