Update AppImage deps and fix packaging

packaging/appimage/bundle-python.py

@@ -0,0 +1,50 @@
+#!/usr/bin/env python3
+"""Copy the private interpreter, stdlib and declared plugin dependencies."""
+
+import importlib.metadata
+from pathlib import Path
+import shutil
+import sys
+import sysconfig
+
+
+def main():
+    destination = Path(sys.argv[1]).resolve() / "usr"
+    version = f"{sys.version_info.major}.{sys.version_info.minor}"
+    stdlib = Path(sysconfig.get_path("stdlib"))
+    target_stdlib = destination / "lib" / f"python{version}"
+    target_stdlib.parent.mkdir(parents=True, exist_ok=True)
+    shutil.copytree(
+        stdlib, target_stdlib,
+        ignore=shutil.ignore_patterns("site-packages", "__pycache__", "*.a", "test", "tests"),
+    )
+    (destination / "bin").mkdir(parents=True, exist_ok=True)
+    shutil.copy2(sys.executable, destination / "bin" / "python3")
+    libdir = Path(sysconfig.get_config_var("LIBDIR"))
+    library = sysconfig.get_config_var("LDLIBRARY")
+    for source in libdir.glob(f"{library}*"):
+        # Dereference the build prefix's symlinks so none point outside AppDir.
+        shutil.copy2(source, destination / "lib" / source.name)
+
+    site = target_stdlib / "site-packages"
+    site.mkdir()
+    for name in ("cffi", "pycparser"):
+        distribution = importlib.metadata.distribution(name)
+        for entry in distribution.files:
+            # Wheel metadata and the native backend belong to the runtime;
+            # scripts installed outside site-packages belong to the build.
+            if ".." in entry.parts or entry.suffix == ".pyc":
+                continue
+            source = Path(distribution.locate_file(entry))
+            target = site / entry
+            target.parent.mkdir(parents=True, exist_ok=True)
+            shutil.copy2(source, target)
+
+    # _tkinter also needs Tcl/Tk's scripts, not just its ELF dependencies.
+    for name in ("tcl8.6", "tk8.6"):
+        shutil.copytree(Path("/usr/share/tcltk") / name,
+                        destination / "share/tcltk" / name)
+
+
+if __name__ == "__main__":
+    main()