Publish Source Available licenses and remove Mutagen in YouTubeDL 1.4.7 / helper 1.3.3

host/python_packages.py

@@ -0,0 +1,41 @@
+"""Python dependencies used by the helper; optional cover tagging is excluded."""
+from __future__ import annotations
+
+import importlib.metadata
+import re
+from pathlib import Path
+
+
+def requirements(yt_dlp="yt-dlp>=2026.8.19", ejs="yt-dlp-ejs"):
+    return [yt_dlp, ejs, "brotli", "certifi", "pycryptodomex",
+            "requests>=2.32.2,<3", "urllib3>=2,<3", "websockets>=13"]
+
+
+def validate_metadata(records):
+    """Reject strong copyleft Python libraries before activating a bundle.
+
+    FFmpeg is a separately executed program, so this policy concerns Python
+    libraries loaded into the helper process, not the FFmpeg distribution.
+    """
+    for metadata in records:
+        name = re.sub(r"[-_.]+", "-", metadata.get("name", "").lower())
+        licenses = [metadata.get("license_expression") or "", metadata.get("license") or "",
+                    *metadata.get("classifier", [])]
+        incompatible = name == "mutagen" or any(
+            re.search(r"(?<![A-Z])(?:A?GPL)(?:[-\s\dv]|$)|GNU (?:Affero )?General Public License",
+                      license, re.IGNORECASE) for license in licenses)
+        if incompatible:
+            raise ValueError(f"Python-пакет {name} требует отдельной проверки совместимости лицензии; комплект не изменён.")
+
+
+def validate_installed(directory: Path):
+    records = []
+    for distribution in importlib.metadata.distributions(path=[str(directory)]):
+        metadata = distribution.metadata
+        records.append({"name": metadata.get("Name", ""),
+                        "license_expression": metadata.get("License-Expression", ""),
+                        "license": metadata.get("License", ""),
+                        "classifier": metadata.get_all("Classifier") or []})
+    validate_metadata(records)
+    return {distribution.metadata["Name"]: distribution.version
+            for distribution in importlib.metadata.distributions(path=[str(directory)])}