We are currently solving the following issue within our repository. Here is the issue text:
--- BEGIN ISSUE ---
`unimported`'s `ignore_subdirectories` doesn't work
### Problem


```sh
beet unimported
```

Leads to directories specified in `ignore_subdirectories` still being listed

### Setup

* OS: Arch Linux
* Python version: 3.11.7 
* beets version: 1.6.1
* Turning off plugins made problem go away (yes/no): n/a

My configuration (output of `beet config`) is:

```yaml
unimported:
  ignore_extensions: jpg png txt md org mod
  ignore_subdirectories: Unsorted import
```
`ignore_extensions` works as expected though



--- END ISSUE ---

Below are some code segments, each from a relevant file. One or more of these files may contain bugs.
--- BEGIN FILES ---
Path: `beetsplug/unimported.py`
Content:
```
1 # This file is part of beets.
2 # Copyright 2019, Joris Jensen
3 #
4 # Permission is hereby granted, free of charge, to any person obtaining
5 # a copy of this software and associated documentation files (the
6 # "Software"), to deal in the Software without restriction, including
7 # without limitation the rights to use, copy, modify, merge, publish,
8 # distribute, sublicense, and/or sell copies of the Software, and to
9 # permit persons to whom the Software is furnished to do so, subject to
10 # the following conditions:
11 #
12 # The above copyright notice and this permission notice shall be
13 # included in all copies or substantial portions of the Software.
14 
15 """
16 List all files in the library folder which are not listed in the
17  beets library database, including art files
18 """
19 
20 import os
21 
22 from beets import util
23 from beets.plugins import BeetsPlugin
24 from beets.ui import Subcommand, print_
25 
26 __author__ = "https://github.com/MrNuggelz"
27 
28 
29 class Unimported(BeetsPlugin):
30     def __init__(self):
31         super().__init__()
32         self.config.add({"ignore_extensions": [], "ignore_subdirectories": []})
33 
34     def commands(self):
35         def print_unimported(lib, opts, args):
36             ignore_exts = [
37                 ("." + x).encode()
38                 for x in self.config["ignore_extensions"].as_str_seq()
39             ]
40             ignore_dirs = [
41                 os.path.join(lib.directory, x.encode())
42                 for x in self.config["ignore_subdirectories"].as_str_seq()
43             ]
44             in_folder = {
45                 os.path.join(r, file)
46                 for r, d, f in os.walk(lib.directory)
47                 for file in f
48                 if not any(
49                     [file.endswith(ext) for ext in ignore_exts]
50                     + [r in ignore_dirs]
51                 )
52             }
53             in_library = {x.path for x in lib.items()}
54             art_files = {x.artpath for x in lib.albums()}
55             for f in in_folder - in_library - art_files:
56                 print_(util.displayable_path(f))
57 
58         unimported = Subcommand(
59             "unimported",
60             help="list all files in the library folder which are not listed"
61             " in the beets library database",
62         )
63         unimported.func = print_unimported
64         return [unimported]
65
```
--- END FILES ---

Please first localize the bug based on the issue statement, and then generate a patch according to the `git diff` format fenced by three backticks.

Here is an example:

```diff
diff --git a/examples/server_async.py b/examples/server_async.py
--- a/examples/server_async.py
+++ b/examples/server_async.py
@@ -313,4 +313,4 @@
 
 
 if __name__ == "__main__":
-    asyncio.run(run_async_server("."), debug=True)
+    asyncio.run(run_async_server(), debug=True)
diff --git a/examples/server_sync.py b/examples/server_sync.py
--- a/examples/server_sync.py
+++ b/examples/server_sync.py
@@ -313,5 +313,5 @@
 
 
 if __name__ == "__main__":
-    server = run_sync_server(".")
+    server = run_sync_server()
     server.shutdown()

```

diff --git a/beetsplug/unimported.py b/beetsplug/unimported.py
--- a/beetsplug/unimported.py
+++ b/beetsplug/unimported.py
@@ -41,15 +41,17 @@
                 os.path.join(lib.directory, x.encode())
                 for x in self.config["ignore_subdirectories"].as_str_seq()
             ]
-            in_folder = {
-                os.path.join(r, file)
-                for r, d, f in os.walk(lib.directory)
-                for file in f
-                if not any(
-                    [file.endswith(ext) for ext in ignore_exts]
-                    + [r in ignore_dirs]
-                )
-            }
+            in_folder = set()
+            for root, _, files in os.walk(lib.directory):
+                # do not traverse if root is a child of an ignored directory
+                if any(root.startswith(ignored) for ignored in ignore_dirs):
+                    continue
+                for file in files:
+                    # ignore files with ignored extensions
+                    if any(file.endswith(ext) for ext in ignore_exts):
+                        continue
+                    in_folder.add(os.path.join(root, file))
+
             in_library = {x.path for x in lib.items()}
             art_files = {x.artpath for x in lib.albums()}
             for f in in_folder - in_library - art_files:

{"golden_diff": "diff --git a/beetsplug/unimported.py b/beetsplug/unimported.py\n--- a/beetsplug/unimported.py\n+++ b/beetsplug/unimported.py\n@@ -41,15 +41,17 @@\n                 os.path.join(lib.directory, x.encode())\n                 for x in self.config[\"ignore_subdirectories\"].as_str_seq()\n             ]\n-            in_folder = {\n-                os.path.join(r, file)\n-                for r, d, f in os.walk(lib.directory)\n-                for file in f\n-                if not any(\n-                    [file.endswith(ext) for ext in ignore_exts]\n-                    + [r in ignore_dirs]\n-                )\n-            }\n+            in_folder = set()\n+            for root, _, files in os.walk(lib.directory):\n+                # do not traverse if root is a child of an ignored directory\n+                if any(root.startswith(ignored) for ignored in ignore_dirs):\n+                    continue\n+                for file in files:\n+                    # ignore files with ignored extensions\n+                    if any(file.endswith(ext) for ext in ignore_exts):\n+                        continue\n+                    in_folder.add(os.path.join(root, file))\n+\n             in_library = {x.path for x in lib.items()}\n             art_files = {x.artpath for x in lib.albums()}\n             for f in in_folder - in_library - art_files:\n", "issue": "`unimported`'s `ignore_subdirectories` doesn't work\n### Problem\r\n\r\n\r\n```sh\r\nbeet unimported\r\n```\r\n\r\nLeads to directories specified in `ignore_subdirectories` still being listed\r\n\r\n### Setup\r\n\r\n* OS: Arch Linux\r\n* Python version: 3.11.7 \r\n* beets version: 1.6.1\r\n* Turning off plugins made problem go away (yes/no): n/a\r\n\r\nMy configuration (output of `beet config`) is:\r\n\r\n```yaml\r\nunimported:\r\n  ignore_extensions: jpg png txt md org mod\r\n  ignore_subdirectories: Unsorted import\r\n```\r\n`ignore_extensions` works as expected though\r\n\r\n\n", "before_files": [{"content": "# This file is part of beets.\n# Copyright 2019, Joris Jensen\n#\n# Permission is hereby granted, free of charge, to any person obtaining\n# a copy of this software and associated documentation files (the\n# \"Software\"), to deal in the Software without restriction, including\n# without limitation the rights to use, copy, modify, merge, publish,\n# distribute, sublicense, and/or sell copies of the Software, and to\n# permit persons to whom the Software is furnished to do so, subject to\n# the following conditions:\n#\n# The above copyright notice and this permission notice shall be\n# included in all copies or substantial portions of the Software.\n\n\"\"\"\nList all files in the library folder which are not listed in the\n beets library database, including art files\n\"\"\"\n\nimport os\n\nfrom beets import util\nfrom beets.plugins import BeetsPlugin\nfrom beets.ui import Subcommand, print_\n\n__author__ = \"https://github.com/MrNuggelz\"\n\n\nclass Unimported(BeetsPlugin):\n    def __init__(self):\n        super().__init__()\n        self.config.add({\"ignore_extensions\": [], \"ignore_subdirectories\": []})\n\n    def commands(self):\n        def print_unimported(lib, opts, args):\n            ignore_exts = [\n                (\".\" + x).encode()\n                for x in self.config[\"ignore_extensions\"].as_str_seq()\n            ]\n            ignore_dirs = [\n                os.path.join(lib.directory, x.encode())\n                for x in self.config[\"ignore_subdirectories\"].as_str_seq()\n            ]\n            in_folder = {\n                os.path.join(r, file)\n                for r, d, f in os.walk(lib.directory)\n                for file in f\n                if not any(\n                    [file.endswith(ext) for ext in ignore_exts]\n                    + [r in ignore_dirs]\n                )\n            }\n            in_library = {x.path for x in lib.items()}\n            art_files = {x.artpath for x in lib.albums()}\n            for f in in_folder - in_library - art_files:\n                print_(util.displayable_path(f))\n\n        unimported = Subcommand(\n            \"unimported\",\n            help=\"list all files in the library folder which are not listed\"\n            \" in the beets library database\",\n        )\n        unimported.func = print_unimported\n        return [unimported]\n", "path": "beetsplug/unimported.py"}], "after_files": [{"content": "# This file is part of beets.\n# Copyright 2019, Joris Jensen\n#\n# Permission is hereby granted, free of charge, to any person obtaining\n# a copy of this software and associated documentation files (the\n# \"Software\"), to deal in the Software without restriction, including\n# without limitation the rights to use, copy, modify, merge, publish,\n# distribute, sublicense, and/or sell copies of the Software, and to\n# permit persons to whom the Software is furnished to do so, subject to\n# the following conditions:\n#\n# The above copyright notice and this permission notice shall be\n# included in all copies or substantial portions of the Software.\n\n\"\"\"\nList all files in the library folder which are not listed in the\n beets library database, including art files\n\"\"\"\n\nimport os\n\nfrom beets import util\nfrom beets.plugins import BeetsPlugin\nfrom beets.ui import Subcommand, print_\n\n__author__ = \"https://github.com/MrNuggelz\"\n\n\nclass Unimported(BeetsPlugin):\n    def __init__(self):\n        super().__init__()\n        self.config.add({\"ignore_extensions\": [], \"ignore_subdirectories\": []})\n\n    def commands(self):\n        def print_unimported(lib, opts, args):\n            ignore_exts = [\n                (\".\" + x).encode()\n                for x in self.config[\"ignore_extensions\"].as_str_seq()\n            ]\n            ignore_dirs = [\n                os.path.join(lib.directory, x.encode())\n                for x in self.config[\"ignore_subdirectories\"].as_str_seq()\n            ]\n            in_folder = set()\n            for root, _, files in os.walk(lib.directory):\n                # do not traverse if root is a child of an ignored directory\n                if any(root.startswith(ignored) for ignored in ignore_dirs):\n                    continue\n                for file in files:\n                    # ignore files with ignored extensions\n                    if any(file.endswith(ext) for ext in ignore_exts):\n                        continue\n                    in_folder.add(os.path.join(root, file))\n\n            in_library = {x.path for x in lib.items()}\n            art_files = {x.artpath for x in lib.albums()}\n            for f in in_folder - in_library - art_files:\n                print_(util.displayable_path(f))\n\n        unimported = Subcommand(\n            \"unimported\",\n            help=\"list all files in the library folder which are not listed\"\n            \" in the beets library database\",\n        )\n        unimported.func = print_unimported\n        return [unimported]\n", "path": "beetsplug/unimported.py"}]}