split and fixes for phantom

yt_dlp/jsinterp/common.py

@@ -4,8 +4,14 @@ import abc
 import typing
 import functools
 
-from ..utils import classproperty, format_field, variadic, ExtractorError
 from ..extractor.common import InfoExtractor
+from ..utils import (
+    classproperty,
+    format_field,
+    get_exe_version,
+    variadic,
+    ExtractorError,
+)
 
 
 _JSI_HANDLERS: dict[str, type[JSI]] = {}
@@ -220,6 +226,22 @@ class JSI(abc.ABC):
         return cls.__name__[:-3]
 
 
+class ExternalJSI(JSI, abc.ABC):
+    _EXE_NAME: str
+
+    @classproperty(cache=True)
+    def exe_version(cls):
+        return get_exe_version(cls._EXE_NAME, args=getattr(cls, 'V_ARGS', ['--version']), version_re=r'([0-9.]+)')
+
+    @classproperty
+    def exe(cls):
+        return cls._EXE_NAME if cls.exe_version else None
+
+    @classmethod
+    def is_available(cls):
+        return bool(cls.exe)
+
+
 def register_jsi(jsi_cls: JsiClass) -> JsiClass:
     """Register a JS interpreter class"""
     assert issubclass(jsi_cls, JSI), f'{jsi_cls} must be a subclass of JSI'