yt-dlp: use deno for nsig extraction

yt-dlp-use-deno-for-nsig.patch

diff --git a/yt_dlp/extractor/youtube.py b/yt_dlp/extractor/youtube.py
index b9623cbf8..abe996273 100644
--- a/yt_dlp/extractor/youtube.py
+++ b/yt_dlp/extractor/youtube.py
@@ -19,6 +19,8 @@
 import urllib.error
 import urllib.parse
 import urllib3
+import tempfile
+import subprocess

 from .common import InfoExtractor, SearchInfoExtractor
 from .openload import PhantomJSwrapper
@@ -29,6 +31,7 @@
     NO_DEFAULT,
     ExtractorError,
     LazyList,
+    Popen,
     UserNotLive,
     bug_reports_message,
     classproperty,
@@ -3106,18 +3109,37 @@ def _extract_n_function_code(self, video_id, player_url):
         return jsi, player_id, func_code

     def _extract_n_function_from_code(self, jsi, func_code):
+        args, func_body = func_code
         func = jsi.extract_function_from_code(*func_code)

         def extract_nsig(s):
+            tmp = tempfile.NamedTemporaryFile(prefix="yt-dlp-nsig-for-deno.", delete=False)
+            tmp.close()
+
+            jscode = f'console.log(function({", ".join(args)}) {{ {func_body} }}({s!r}));'
+            with open(tmp.name, 'w', encoding='utf-8') as f:
+                f.write(jscode)
+
             try:
-                ret = func([s])
-            except JSInterpreter.Exception:
-                raise
+                stdout, stderr, returncode = Popen.run(
+                    ['deno', 'run', tmp.name],
+                    timeout=10,
+                    text=True,
+                    stdout=subprocess.PIPE,
+                    stderr=subprocess.PIPE,
+                )
             except Exception as e:
-                raise JSInterpreter.Exception(traceback.format_exc(), cause=e)
+                raise ExtractorError('Executing JS failed: Unable to run Deno binary', cause=e)
+            finally:
+                os.remove(tmp.name)
+            if returncode:
+                raise ExtractorError(f'Executing JS failed with returncode {returncode}:\n{stderr.strip()}')
+
+            ret = stdout.strip()

             if ret.startswith('enhanced_except_'):
-                raise JSInterpreter.Exception('Signature function returned an exception')
+                raise Exception('Signature function returned an exception')
+
             return ret

         return extract_nsig

This is a patch for yt-dlp to do nsig extraction with deno, with the code largely stolen from https://github.com/cute-sakura/yt-dlp-YTNSigDeno/blob/a3c87533dc513b1ca6d16197d4f8fe9ea35cc35f/yt_dlp_plugins/extractor/yt_nsig_deno.py, which does it as a plugin instead.