typing: make albums_in_dir, sorted_walk and other utils generic over AnyStr

[snejus]

• This change makes the path-handling utilities is_hidden, sorted_walk, unique_path, remux_mpeglayer3_wav and albums_in_dir work with both str and bytes paths instead of assuming bytes everywhere.

• Architecturally, the PR moves these helpers toward a single generic path flow using AnyStr, so callers can stay in their native path type while the utilities preserve that type through traversal, filtering, and hidden-file checks.

• In albums_in_dir, the multi-disc detection logic was updated to support both string and byte paths by splitting regex handling into str and bytes variants while keeping the existing album-collapsing behavior the same.

• High-level impact: this reduces path-conversion friction, improves typing consistency across importer and util code, and makes the filesystem helpers easier to reuse as the codebase continues moving away from bytes-only assumptions.

[github-actions]

Thank you for the PR! The changelog has not been updated, so here is a friendly reminder to check if you need to add an entry.

[codecov]

❌ 1 Tests Failed:

Tests completed	Failed	Passed	Skipped
2589	1	2588	64

View the top 1 failed test(s) by shortest run time

test/test_importer.py::TestMpeglayerWavImport::test_remux_mpeglayer3_wav

Stack Traces | 0.015s run time

self = <test.test_importer.TestMpeglayerWavImport object at 0x7f56dab25930>

    #x1B[0m#x1B[94mdef#x1B[39;49;00m#x1B[90m #x1B[39;49;00m#x1B[92mtest_remux_mpeglayer3_wav#x1B[39;49;00m(#x1B[96mself#x1B[39;49;00m):#x1B[90m#x1B[39;49;00m
        src = os.path.join(_common.RSRC, #x1B[33mb#x1B[39;49;00m#x1B[33m"#x1B[39;49;00m#x1B[33mmpeglayer3.wav#x1B[39;49;00m#x1B[33m"#x1B[39;49;00m)#x1B[90m#x1B[39;49;00m
        dest = os.path.join(#x1B[96mself#x1B[39;49;00m.temp_dir, #x1B[33mb#x1B[39;49;00m#x1B[33m"#x1B[39;49;00m#x1B[33mmpeglayer3.wav#x1B[39;49;00m#x1B[33m"#x1B[39;49;00m)#x1B[90m#x1B[39;49;00m
        shutil.copy(syspath(src), syspath(dest))#x1B[90m#x1B[39;49;00m
    #x1B[90m#x1B[39;49;00m
        mp3_path = remux_mpeglayer3_wav(dest)#x1B[90m#x1B[39;49;00m
    #x1B[90m#x1B[39;49;00m
        #x1B[94massert#x1B[39;49;00m mp3_path #x1B[95mis#x1B[39;49;00m #x1B[95mnot#x1B[39;49;00m #x1B[94mNone#x1B[39;49;00m#x1B[90m#x1B[39;49;00m
>       #x1B[94massert#x1B[39;49;00m mp3_path.suffix == #x1B[33m"#x1B[39;49;00m#x1B[33m.mp3#x1B[39;49;00m#x1B[33m"#x1B[39;49;00m#x1B[90m#x1B[39;49;00m
#x1B[1m#x1B[31mE       AttributeError: 'bytes' object has no attribute 'suffix'#x1B[0m

#x1B[1m#x1B[31mtest/test_importer.py#x1B[0m:1904: AttributeError

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[Copilot]

Pull request overview

PR make path helper move from “bytes-only brain” toward “AnyStr brain” so code can walk filesystem with str or bytes and keep same type through.

Changes:

• Make beets.util.hidden.is_hidden accept PathLike and decode/normalize into Path.
• Change beets.util.sorted_walk typing/output to be generic over AnyStr (str/bytes) and adjust sorting to match path type.
• Update importer albums_in_dir multi-disc detection so regex + ignore patterns work for both str and bytes paths.

Reviewed changes

Copilot reviewed 3 out of 3 changed files in this pull request and generated 2 comments.

File	Description
beets/util/hidden.py	Widen hidden-path helper to accept broader path inputs and normalize via Path.
beets/util/init.py	Make sorted_walk generic over AnyStr and preserve path type through traversal.
beets/importer/tasks.py	Make albums_in_dir and multi-disc regex logic work for str and bytes paths.