We are currently solving the following issue within our repository. Here is the issue text:
--- BEGIN ISSUE ---
 File name too long error when using metadata in output filename
### Checklist

- [X] This is a bug report and not [a different kind of issue](https://github.com/streamlink/streamlink/issues/new/choose)
- [X] [I have read the contribution guidelines](https://github.com/streamlink/streamlink/blob/master/CONTRIBUTING.md#contributing-to-streamlink)
- [X] [I have checked the list of open and recently closed bug reports](https://github.com/streamlink/streamlink/issues?q=is%3Aissue+label%3A%22bug%22)
- [X] [I have checked the commit log of the master branch](https://github.com/streamlink/streamlink/commits/master)

### Streamlink version

streamlink 6.7.2

### Description

The plugin should slice the output filename generated by metadata when the string exceed 255 bytes which will cause File name too long error.

I have solve it by adding the following to 'check_file_output'

```
root, ext = os.path.splitext(os.path.realpath(path).encode())
realpath = Path((root[:255 - len(ext)] + ext).decode(errors='ignore'))
```

### Debug log

```text
[10:57:48.870241][session][debug] Loading plugin: twitch
[10:57:48.936603][cli][debug] OS:         Linux-5.15.0-101-generic-x86_64-with-glibc2.29
[10:57:48.944412][cli][debug] Python:     3.8.10
[10:57:48.945094][cli][debug] OpenSSL:    OpenSSL 1.1.1f  31 Mar 2020
[10:57:48.945723][cli][debug] Streamlink: 6.7.2
[10:57:48.948742][cli][debug] Dependencies:
[10:57:48.976956][cli][debug]  certifi: 2024.2.2
[10:57:48.997520][cli][debug]  exceptiongroup: 1.2.0
[10:57:49.007621][cli][debug]  isodate: 0.6.1
[10:57:49.025597][cli][debug]  lxml: 4.9.4
[10:57:49.042283][cli][debug]  pycountry: 23.12.11
[10:57:49.057904][cli][debug]  pycryptodome: 3.20.0
[10:57:49.067723][cli][debug]  PySocks: 1.7.1
[10:57:49.081707][cli][debug]  requests: 2.31.0
[10:57:49.091640][cli][debug]  trio: 0.24.0
[10:57:49.105944][cli][debug]  trio-websocket: 0.11.1
[10:57:49.116662][cli][debug]  typing-extensions: 4.9.0
[10:57:49.136825][cli][debug]  urllib3: 2.2.0
[10:57:49.148906][cli][debug]  websocket-client: 1.7.0
[10:57:49.149938][cli][debug] Arguments:
[10:57:49.150537][cli][debug]  url=https://twitch.tv/solfi02
[10:57:49.151088][cli][debug]  stream=['best']
[10:57:49.151736][cli][debug]  --loglevel=debug
[10:57:49.152431][cli][debug]  --output=/home/NAS/broadcast/streams/twitch_solfi02/240403_105748_solfi02_{title}_{category}.ts
[10:57:49.155160][cli][debug]  --twitch-disable-ads=True
[10:57:49.157319][cli][info] Found matching plugin twitch for URL https://twitch.tv/solfi02
[10:57:49.158011][plugins.twitch][debug] Getting live HLS streams for solfi02
[10:57:49.472515][plugins.twitch][debug] {'adblock': False, 'geoblock_reason': '', 'hide_ads': False, 'server_ads': True, 'show_ads': True}
[10:57:49.707814][utils.l10n][debug] Language code: en_GB
[10:57:51.383465][cli][info] Available streams: audio_only, 160p (worst), 360p, 480p, 720p60, 1080p60 (best)
[10:57:51.383988][cli][info] Opening stream: 1080p60 (hls)
[10:57:51.394701][cli][info] Writing output to
/home/NAS/broadcast/streams/twitch_solfi02/240403_105748_solfi02_43950115467_해묘!해묘!해묘!해묘!해묘!해묘!해묘!해묘!해묘!해묘!해묘!해묘!해묘!해묘!해묘!해묘!해묘!해묘!해묘!해묘!해묘!해묘!해묘!해묘!해묘!해묘!해묘!해묘!해묘!해묘!해묘!해묘!해묘!해묘!해묘!해묘!해묘!해묘!해묘!해묘!해묘!해묘!해묘!해묘!해묘!해묘!해묘_Art.ts
[10:57:51.395080][cli][debug] Checking file output
debugback (most recent call last):
  File "/home/admin/.local/bin/streamlink", line 8, in <module>
    sys.exit(main())
  File "/home/admin/.local/lib/python3.8/site-packages/streamlink_cli/main.py", line 963, in main
    error_code = run(parser)
  File "/home/admin/.local/lib/python3.8/site-packages/streamlink_cli/main.py", line 936, in run
    handle_url()
  File "/home/admin/.local/lib/python3.8/site-packages/streamlink_cli/main.py", line 573, in handle_url
    handle_stream(plugin, streams, stream_name)
  File "/home/admin/.local/lib/python3.8/site-packages/streamlink_cli/main.py", line 445, in handle_stream
    success = output_stream(stream, formatter)
  File "/home/admin/.local/lib/python3.8/site-packages/streamlink_cli/main.py", line 341, in output_stream
    output = create_output(formatter)
  File "/home/admin/.local/lib/python3.8/site-packages/streamlink_cli/main.py", line 109, in create_output
    return check_file_output(formatter.path(args.output, args.fs_safe_rules), args.force)
  File "/home/admin/.local/lib/python3.8/site-packages/streamlink_cli/main.py", line 78, in check_file_output
    if realpath.is_file() and not force:
  File "/usr/lib/python3.8/pathlib.py", line 1439, in is_file
    return S_ISREG(self.stat().st_mode)
  File "/usr/lib/python3.8/pathlib.py", line 1198, in stat
    return self._accessor.stat(self)
OSError: [Errno 36] File name too long: '/home/NAS/broadcast/streams/twitch_solfi02/240403_105748_solfi02_43950115467_해묘!해묘!해묘!해묘!해묘!해묘!해묘!해묘!해묘!해묘!해묘!해묘!해묘!해묘!해묘!해묘!해묘!해묘!해묘!해묘!해묘!해묘!해묘!해묘!해묘!해묘!해묘!해묘!해묘!해묘!해묘!해묘!해묘!해묘!해묘!해묘!해묘!해묘!해묘!해묘!해묘!해묘!해묘!해묘!해묘!해묘!해묘_Art.ts'
```


--- END ISSUE ---

Below are some code segments, each from a relevant file. One or more of these files may contain bugs.
--- BEGIN FILES ---
Path: `src/streamlink_cli/utils/formatter.py`
Content:
```
1 from pathlib import Path
2 from typing import Optional
3 
4 from streamlink.utils.formatter import Formatter as _BaseFormatter
5 from streamlink_cli.utils.path import replace_chars, replace_path
6 
7 
8 class Formatter(_BaseFormatter):
9     title = _BaseFormatter.format
10 
11     def path(self, pathlike: str, charmap: Optional[str] = None) -> Path:
12         def mapper(s):
13             return replace_chars(s, charmap)
14 
15         def format_part(part):
16             return self._format(part, mapper, {})
17 
18         return replace_path(pathlike, format_part)
19
```

Path: `src/streamlink_cli/utils/path.py`
Content:
```
1 import re
2 from pathlib import Path
3 from typing import Callable, Optional, Union
4 
5 from streamlink.compat import is_win32
6 
7 
8 REPLACEMENT = "_"
9 SPECIAL_PATH_PARTS = (".", "..")
10 
11 _UNPRINTABLE = "".join(chr(c) for c in range(32))
12 _UNSUPPORTED_POSIX = "/"
13 _UNSUPPORTED_WIN32 = "\x7f\"*/:<>?\\|"
14 
15 RE_CHARS_POSIX = re.compile(f"[{re.escape(_UNPRINTABLE + _UNSUPPORTED_POSIX)}]+")
16 RE_CHARS_WIN32 = re.compile(f"[{re.escape(_UNPRINTABLE + _UNSUPPORTED_WIN32)}]+")
17 if is_win32:
18     RE_CHARS = RE_CHARS_WIN32
19 else:
20     RE_CHARS = RE_CHARS_POSIX
21 
22 
23 def replace_chars(path: str, charmap: Optional[str] = None, replacement: str = REPLACEMENT) -> str:
24     if charmap is None:
25         pattern = RE_CHARS
26     else:
27         charmap = charmap.lower()
28         if charmap in ("posix", "unix"):
29             pattern = RE_CHARS_POSIX
30         elif charmap in ("windows", "win32"):
31             pattern = RE_CHARS_WIN32
32         else:
33             raise ValueError("Invalid charmap")
34 
35     return pattern.sub(replacement, path)
36 
37 
38 def replace_path(pathlike: Union[str, Path], mapper: Callable[[str], str]) -> Path:
39     def get_part(part):
40         newpart = mapper(part)
41         return REPLACEMENT if part != newpart and newpart in SPECIAL_PATH_PARTS else newpart
42 
43     return Path(*(get_part(part) for part in Path(pathlike).expanduser().parts))
44
```
--- 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/src/streamlink_cli/utils/formatter.py b/src/streamlink_cli/utils/formatter.py
--- a/src/streamlink_cli/utils/formatter.py
+++ b/src/streamlink_cli/utils/formatter.py
@@ -2,17 +2,18 @@
 from typing import Optional
 
 from streamlink.utils.formatter import Formatter as _BaseFormatter
-from streamlink_cli.utils.path import replace_chars, replace_path
+from streamlink_cli.utils.path import replace_chars, replace_path, truncate_path
 
 
 class Formatter(_BaseFormatter):
     title = _BaseFormatter.format
 
-    def path(self, pathlike: str, charmap: Optional[str] = None) -> Path:
+    def path(self, pathlike: str, charmap: Optional[str] = None, max_filename_length: int = 255) -> Path:
         def mapper(s):
             return replace_chars(s, charmap)
 
-        def format_part(part):
-            return self._format(part, mapper, {})
+        def format_part(part: str, isfile: bool) -> str:
+            formatted = self._format(part, mapper, {})
+            return truncate_path(formatted, max_filename_length, keep_extension=isfile)
 
         return replace_path(pathlike, format_part)
diff --git a/src/streamlink_cli/utils/path.py b/src/streamlink_cli/utils/path.py
--- a/src/streamlink_cli/utils/path.py
+++ b/src/streamlink_cli/utils/path.py
@@ -35,9 +35,34 @@
     return pattern.sub(replacement, path)
 
 
-def replace_path(pathlike: Union[str, Path], mapper: Callable[[str], str]) -> Path:
-    def get_part(part):
-        newpart = mapper(part)
+# This method does not take care of unicode modifier characters when truncating
+def truncate_path(path: str, length: int = 255, keep_extension: bool = True) -> str:
+    if len(path) <= length:
+        return path
+
+    parts = path.rsplit(".", 1)
+
+    # no file name extension (no dot separator in path or file name extension too long):
+    # truncate the whole thing
+    if not keep_extension or len(parts) == 1 or len(parts[1]) > 10:
+        encoded = path.encode("utf-8")
+        truncated = encoded[:length]
+        decoded = truncated.decode("utf-8", errors="ignore")
+        return decoded
+
+    # truncate file name, but keep file name extension
+    encoded = parts[0].encode("utf-8")
+    truncated = encoded[:length - len(parts[1]) - 1]
+    decoded = truncated.decode("utf-8", errors="ignore")
+    return f"{decoded}.{parts[1]}"
+
+
+def replace_path(pathlike: Union[str, Path], mapper: Callable[[str, bool], str]) -> Path:
+    def get_part(part: str, isfile: bool) -> str:
+        newpart = mapper(part, isfile)
         return REPLACEMENT if part != newpart and newpart in SPECIAL_PATH_PARTS else newpart
 
-    return Path(*(get_part(part) for part in Path(pathlike).expanduser().parts))
+    parts = Path(pathlike).expanduser().parts
+    last = len(parts) - 1
+
+    return Path(*(get_part(part, i == last) for i, part in enumerate(parts)))

{"golden_diff": "diff --git a/src/streamlink_cli/utils/formatter.py b/src/streamlink_cli/utils/formatter.py\n--- a/src/streamlink_cli/utils/formatter.py\n+++ b/src/streamlink_cli/utils/formatter.py\n@@ -2,17 +2,18 @@\n from typing import Optional\n \n from streamlink.utils.formatter import Formatter as _BaseFormatter\n-from streamlink_cli.utils.path import replace_chars, replace_path\n+from streamlink_cli.utils.path import replace_chars, replace_path, truncate_path\n \n \n class Formatter(_BaseFormatter):\n     title = _BaseFormatter.format\n \n-    def path(self, pathlike: str, charmap: Optional[str] = None) -> Path:\n+    def path(self, pathlike: str, charmap: Optional[str] = None, max_filename_length: int = 255) -> Path:\n         def mapper(s):\n             return replace_chars(s, charmap)\n \n-        def format_part(part):\n-            return self._format(part, mapper, {})\n+        def format_part(part: str, isfile: bool) -> str:\n+            formatted = self._format(part, mapper, {})\n+            return truncate_path(formatted, max_filename_length, keep_extension=isfile)\n \n         return replace_path(pathlike, format_part)\ndiff --git a/src/streamlink_cli/utils/path.py b/src/streamlink_cli/utils/path.py\n--- a/src/streamlink_cli/utils/path.py\n+++ b/src/streamlink_cli/utils/path.py\n@@ -35,9 +35,34 @@\n     return pattern.sub(replacement, path)\n \n \n-def replace_path(pathlike: Union[str, Path], mapper: Callable[[str], str]) -> Path:\n-    def get_part(part):\n-        newpart = mapper(part)\n+# This method does not take care of unicode modifier characters when truncating\n+def truncate_path(path: str, length: int = 255, keep_extension: bool = True) -> str:\n+    if len(path) <= length:\n+        return path\n+\n+    parts = path.rsplit(\".\", 1)\n+\n+    # no file name extension (no dot separator in path or file name extension too long):\n+    # truncate the whole thing\n+    if not keep_extension or len(parts) == 1 or len(parts[1]) > 10:\n+        encoded = path.encode(\"utf-8\")\n+        truncated = encoded[:length]\n+        decoded = truncated.decode(\"utf-8\", errors=\"ignore\")\n+        return decoded\n+\n+    # truncate file name, but keep file name extension\n+    encoded = parts[0].encode(\"utf-8\")\n+    truncated = encoded[:length - len(parts[1]) - 1]\n+    decoded = truncated.decode(\"utf-8\", errors=\"ignore\")\n+    return f\"{decoded}.{parts[1]}\"\n+\n+\n+def replace_path(pathlike: Union[str, Path], mapper: Callable[[str, bool], str]) -> Path:\n+    def get_part(part: str, isfile: bool) -> str:\n+        newpart = mapper(part, isfile)\n         return REPLACEMENT if part != newpart and newpart in SPECIAL_PATH_PARTS else newpart\n \n-    return Path(*(get_part(part) for part in Path(pathlike).expanduser().parts))\n+    parts = Path(pathlike).expanduser().parts\n+    last = len(parts) - 1\n+\n+    return Path(*(get_part(part, i == last) for i, part in enumerate(parts)))\n", "issue": " File name too long error when using metadata in output filename\n### Checklist\r\n\r\n- [X] This is a bug report and not [a different kind of issue](https://github.com/streamlink/streamlink/issues/new/choose)\r\n- [X] [I have read the contribution guidelines](https://github.com/streamlink/streamlink/blob/master/CONTRIBUTING.md#contributing-to-streamlink)\r\n- [X] [I have checked the list of open and recently closed bug reports](https://github.com/streamlink/streamlink/issues?q=is%3Aissue+label%3A%22bug%22)\r\n- [X] [I have checked the commit log of the master branch](https://github.com/streamlink/streamlink/commits/master)\r\n\r\n### Streamlink version\r\n\r\nstreamlink 6.7.2\r\n\r\n### Description\r\n\r\nThe plugin should slice the output filename generated by metadata when the string exceed 255 bytes which will cause File name too long error.\r\n\r\nI have solve it by adding the following to 'check_file_output'\r\n\r\n```\r\nroot, ext = os.path.splitext(os.path.realpath(path).encode())\r\nrealpath = Path((root[:255 - len(ext)] + ext).decode(errors='ignore'))\r\n```\r\n\r\n### Debug log\r\n\r\n```text\r\n[10:57:48.870241][session][debug] Loading plugin: twitch\r\n[10:57:48.936603][cli][debug] OS:         Linux-5.15.0-101-generic-x86_64-with-glibc2.29\r\n[10:57:48.944412][cli][debug] Python:     3.8.10\r\n[10:57:48.945094][cli][debug] OpenSSL:    OpenSSL 1.1.1f  31 Mar 2020\r\n[10:57:48.945723][cli][debug] Streamlink: 6.7.2\r\n[10:57:48.948742][cli][debug] Dependencies:\r\n[10:57:48.976956][cli][debug]  certifi: 2024.2.2\r\n[10:57:48.997520][cli][debug]  exceptiongroup: 1.2.0\r\n[10:57:49.007621][cli][debug]  isodate: 0.6.1\r\n[10:57:49.025597][cli][debug]  lxml: 4.9.4\r\n[10:57:49.042283][cli][debug]  pycountry: 23.12.11\r\n[10:57:49.057904][cli][debug]  pycryptodome: 3.20.0\r\n[10:57:49.067723][cli][debug]  PySocks: 1.7.1\r\n[10:57:49.081707][cli][debug]  requests: 2.31.0\r\n[10:57:49.091640][cli][debug]  trio: 0.24.0\r\n[10:57:49.105944][cli][debug]  trio-websocket: 0.11.1\r\n[10:57:49.116662][cli][debug]  typing-extensions: 4.9.0\r\n[10:57:49.136825][cli][debug]  urllib3: 2.2.0\r\n[10:57:49.148906][cli][debug]  websocket-client: 1.7.0\r\n[10:57:49.149938][cli][debug] Arguments:\r\n[10:57:49.150537][cli][debug]  url=https://twitch.tv/solfi02\r\n[10:57:49.151088][cli][debug]  stream=['best']\r\n[10:57:49.151736][cli][debug]  --loglevel=debug\r\n[10:57:49.152431][cli][debug]  --output=/home/NAS/broadcast/streams/twitch_solfi02/240403_105748_solfi02_{title}_{category}.ts\r\n[10:57:49.155160][cli][debug]  --twitch-disable-ads=True\r\n[10:57:49.157319][cli][info] Found matching plugin twitch for URL https://twitch.tv/solfi02\r\n[10:57:49.158011][plugins.twitch][debug] Getting live HLS streams for solfi02\r\n[10:57:49.472515][plugins.twitch][debug] {'adblock': False, 'geoblock_reason': '', 'hide_ads': False, 'server_ads': True, 'show_ads': True}\r\n[10:57:49.707814][utils.l10n][debug] Language code: en_GB\r\n[10:57:51.383465][cli][info] Available streams: audio_only, 160p (worst), 360p, 480p, 720p60, 1080p60 (best)\r\n[10:57:51.383988][cli][info] Opening stream: 1080p60 (hls)\r\n[10:57:51.394701][cli][info] Writing output to\r\n/home/NAS/broadcast/streams/twitch_solfi02/240403_105748_solfi02_43950115467_\ud574\ubb18!\ud574\ubb18!\ud574\ubb18!\ud574\ubb18!\ud574\ubb18!\ud574\ubb18!\ud574\ubb18!\ud574\ubb18!\ud574\ubb18!\ud574\ubb18!\ud574\ubb18!\ud574\ubb18!\ud574\ubb18!\ud574\ubb18!\ud574\ubb18!\ud574\ubb18!\ud574\ubb18!\ud574\ubb18!\ud574\ubb18!\ud574\ubb18!\ud574\ubb18!\ud574\ubb18!\ud574\ubb18!\ud574\ubb18!\ud574\ubb18!\ud574\ubb18!\ud574\ubb18!\ud574\ubb18!\ud574\ubb18!\ud574\ubb18!\ud574\ubb18!\ud574\ubb18!\ud574\ubb18!\ud574\ubb18!\ud574\ubb18!\ud574\ubb18!\ud574\ubb18!\ud574\ubb18!\ud574\ubb18!\ud574\ubb18!\ud574\ubb18!\ud574\ubb18!\ud574\ubb18!\ud574\ubb18!\ud574\ubb18!\ud574\ubb18!\ud574\ubb18_Art.ts\r\n[10:57:51.395080][cli][debug] Checking file output\r\ndebugback (most recent call last):\r\n  File \"/home/admin/.local/bin/streamlink\", line 8, in <module>\r\n    sys.exit(main())\r\n  File \"/home/admin/.local/lib/python3.8/site-packages/streamlink_cli/main.py\", line 963, in main\r\n    error_code = run(parser)\r\n  File \"/home/admin/.local/lib/python3.8/site-packages/streamlink_cli/main.py\", line 936, in run\r\n    handle_url()\r\n  File \"/home/admin/.local/lib/python3.8/site-packages/streamlink_cli/main.py\", line 573, in handle_url\r\n    handle_stream(plugin, streams, stream_name)\r\n  File \"/home/admin/.local/lib/python3.8/site-packages/streamlink_cli/main.py\", line 445, in handle_stream\r\n    success = output_stream(stream, formatter)\r\n  File \"/home/admin/.local/lib/python3.8/site-packages/streamlink_cli/main.py\", line 341, in output_stream\r\n    output = create_output(formatter)\r\n  File \"/home/admin/.local/lib/python3.8/site-packages/streamlink_cli/main.py\", line 109, in create_output\r\n    return check_file_output(formatter.path(args.output, args.fs_safe_rules), args.force)\r\n  File \"/home/admin/.local/lib/python3.8/site-packages/streamlink_cli/main.py\", line 78, in check_file_output\r\n    if realpath.is_file() and not force:\r\n  File \"/usr/lib/python3.8/pathlib.py\", line 1439, in is_file\r\n    return S_ISREG(self.stat().st_mode)\r\n  File \"/usr/lib/python3.8/pathlib.py\", line 1198, in stat\r\n    return self._accessor.stat(self)\r\nOSError: [Errno 36] File name too long: '/home/NAS/broadcast/streams/twitch_solfi02/240403_105748_solfi02_43950115467_\ud574\ubb18!\ud574\ubb18!\ud574\ubb18!\ud574\ubb18!\ud574\ubb18!\ud574\ubb18!\ud574\ubb18!\ud574\ubb18!\ud574\ubb18!\ud574\ubb18!\ud574\ubb18!\ud574\ubb18!\ud574\ubb18!\ud574\ubb18!\ud574\ubb18!\ud574\ubb18!\ud574\ubb18!\ud574\ubb18!\ud574\ubb18!\ud574\ubb18!\ud574\ubb18!\ud574\ubb18!\ud574\ubb18!\ud574\ubb18!\ud574\ubb18!\ud574\ubb18!\ud574\ubb18!\ud574\ubb18!\ud574\ubb18!\ud574\ubb18!\ud574\ubb18!\ud574\ubb18!\ud574\ubb18!\ud574\ubb18!\ud574\ubb18!\ud574\ubb18!\ud574\ubb18!\ud574\ubb18!\ud574\ubb18!\ud574\ubb18!\ud574\ubb18!\ud574\ubb18!\ud574\ubb18!\ud574\ubb18!\ud574\ubb18!\ud574\ubb18!\ud574\ubb18_Art.ts'\r\n```\r\n\n", "before_files": [{"content": "from pathlib import Path\nfrom typing import Optional\n\nfrom streamlink.utils.formatter import Formatter as _BaseFormatter\nfrom streamlink_cli.utils.path import replace_chars, replace_path\n\n\nclass Formatter(_BaseFormatter):\n    title = _BaseFormatter.format\n\n    def path(self, pathlike: str, charmap: Optional[str] = None) -> Path:\n        def mapper(s):\n            return replace_chars(s, charmap)\n\n        def format_part(part):\n            return self._format(part, mapper, {})\n\n        return replace_path(pathlike, format_part)\n", "path": "src/streamlink_cli/utils/formatter.py"}, {"content": "import re\nfrom pathlib import Path\nfrom typing import Callable, Optional, Union\n\nfrom streamlink.compat import is_win32\n\n\nREPLACEMENT = \"_\"\nSPECIAL_PATH_PARTS = (\".\", \"..\")\n\n_UNPRINTABLE = \"\".join(chr(c) for c in range(32))\n_UNSUPPORTED_POSIX = \"/\"\n_UNSUPPORTED_WIN32 = \"\\x7f\\\"*/:<>?\\\\|\"\n\nRE_CHARS_POSIX = re.compile(f\"[{re.escape(_UNPRINTABLE + _UNSUPPORTED_POSIX)}]+\")\nRE_CHARS_WIN32 = re.compile(f\"[{re.escape(_UNPRINTABLE + _UNSUPPORTED_WIN32)}]+\")\nif is_win32:\n    RE_CHARS = RE_CHARS_WIN32\nelse:\n    RE_CHARS = RE_CHARS_POSIX\n\n\ndef replace_chars(path: str, charmap: Optional[str] = None, replacement: str = REPLACEMENT) -> str:\n    if charmap is None:\n        pattern = RE_CHARS\n    else:\n        charmap = charmap.lower()\n        if charmap in (\"posix\", \"unix\"):\n            pattern = RE_CHARS_POSIX\n        elif charmap in (\"windows\", \"win32\"):\n            pattern = RE_CHARS_WIN32\n        else:\n            raise ValueError(\"Invalid charmap\")\n\n    return pattern.sub(replacement, path)\n\n\ndef replace_path(pathlike: Union[str, Path], mapper: Callable[[str], str]) -> Path:\n    def get_part(part):\n        newpart = mapper(part)\n        return REPLACEMENT if part != newpart and newpart in SPECIAL_PATH_PARTS else newpart\n\n    return Path(*(get_part(part) for part in Path(pathlike).expanduser().parts))\n", "path": "src/streamlink_cli/utils/path.py"}], "after_files": [{"content": "from pathlib import Path\nfrom typing import Optional\n\nfrom streamlink.utils.formatter import Formatter as _BaseFormatter\nfrom streamlink_cli.utils.path import replace_chars, replace_path, truncate_path\n\n\nclass Formatter(_BaseFormatter):\n    title = _BaseFormatter.format\n\n    def path(self, pathlike: str, charmap: Optional[str] = None, max_filename_length: int = 255) -> Path:\n        def mapper(s):\n            return replace_chars(s, charmap)\n\n        def format_part(part: str, isfile: bool) -> str:\n            formatted = self._format(part, mapper, {})\n            return truncate_path(formatted, max_filename_length, keep_extension=isfile)\n\n        return replace_path(pathlike, format_part)\n", "path": "src/streamlink_cli/utils/formatter.py"}, {"content": "import re\nfrom pathlib import Path\nfrom typing import Callable, Optional, Union\n\nfrom streamlink.compat import is_win32\n\n\nREPLACEMENT = \"_\"\nSPECIAL_PATH_PARTS = (\".\", \"..\")\n\n_UNPRINTABLE = \"\".join(chr(c) for c in range(32))\n_UNSUPPORTED_POSIX = \"/\"\n_UNSUPPORTED_WIN32 = \"\\x7f\\\"*/:<>?\\\\|\"\n\nRE_CHARS_POSIX = re.compile(f\"[{re.escape(_UNPRINTABLE + _UNSUPPORTED_POSIX)}]+\")\nRE_CHARS_WIN32 = re.compile(f\"[{re.escape(_UNPRINTABLE + _UNSUPPORTED_WIN32)}]+\")\nif is_win32:\n    RE_CHARS = RE_CHARS_WIN32\nelse:\n    RE_CHARS = RE_CHARS_POSIX\n\n\ndef replace_chars(path: str, charmap: Optional[str] = None, replacement: str = REPLACEMENT) -> str:\n    if charmap is None:\n        pattern = RE_CHARS\n    else:\n        charmap = charmap.lower()\n        if charmap in (\"posix\", \"unix\"):\n            pattern = RE_CHARS_POSIX\n        elif charmap in (\"windows\", \"win32\"):\n            pattern = RE_CHARS_WIN32\n        else:\n            raise ValueError(\"Invalid charmap\")\n\n    return pattern.sub(replacement, path)\n\n\n# This method does not take care of unicode modifier characters when truncating\ndef truncate_path(path: str, length: int = 255, keep_extension: bool = True) -> str:\n    if len(path) <= length:\n        return path\n\n    parts = path.rsplit(\".\", 1)\n\n    # no file name extension (no dot separator in path or file name extension too long):\n    # truncate the whole thing\n    if not keep_extension or len(parts) == 1 or len(parts[1]) > 10:\n        encoded = path.encode(\"utf-8\")\n        truncated = encoded[:length]\n        decoded = truncated.decode(\"utf-8\", errors=\"ignore\")\n        return decoded\n\n    # truncate file name, but keep file name extension\n    encoded = parts[0].encode(\"utf-8\")\n    truncated = encoded[:length - len(parts[1]) - 1]\n    decoded = truncated.decode(\"utf-8\", errors=\"ignore\")\n    return f\"{decoded}.{parts[1]}\"\n\n\ndef replace_path(pathlike: Union[str, Path], mapper: Callable[[str, bool], str]) -> Path:\n    def get_part(part: str, isfile: bool) -> str:\n        newpart = mapper(part, isfile)\n        return REPLACEMENT if part != newpart and newpart in SPECIAL_PATH_PARTS else newpart\n\n    parts = Path(pathlike).expanduser().parts\n    last = len(parts) - 1\n\n    return Path(*(get_part(part, i == last) for i, part in enumerate(parts)))\n", "path": "src/streamlink_cli/utils/path.py"}]}