don't bundle Qt into ARM Linux package

While it worked, it was not portable to other distros, so we'll rely
on the user to provide their own (Py)Qt.

qt/package/build.py

@@ -62,11 +62,8 @@ else:
     else:
         os.environ["TARGET"] = "aarch64-unknown-linux-gnu"
         pyqt5_folder_name = None
+        pyqt6_folder_path = None
         arm64_linux = True
-        # path to a custom-built/prepared PyQt5 folder
-        # must be provided
-        pyqt6_folder_path = os.getenv("PREPARED_QT_PATH")
-        assert pyqt6_folder_path
 
 
 python = python_bin_folder / "python"
@@ -197,22 +194,23 @@ def adj_path_for_windows_rsync(path: Path) -> str:
     return f"/{path.drive[0]}{rest}"
 
 
-def merge_into_dist(output_folder: Path, pyqt_src_path: Path):
+def merge_into_dist(output_folder: Path, pyqt_src_path: Path | None):
     if not output_folder.exists():
         output_folder.mkdir(parents=True)
     # PyQt
-    subprocess.run(
-        [
-            "rsync",
-            "-a",
-            "--delete",
-            "--exclude-from",
-            "qt.exclude",
-            adj_path_for_windows_rsync(pyqt_src_path),
-            adj_path_for_windows_rsync(output_folder / "lib") + "/",
-        ],
-        check=True,
-    )
+    if pyqt_src_path:
+        subprocess.run(
+            [
+                "rsync",
+                "-a",
+                "--delete",
+                "--exclude-from",
+                "qt.exclude",
+                adj_path_for_windows_rsync(pyqt_src_path),
+                adj_path_for_windows_rsync(output_folder / "lib") + "/",
+            ],
+            check=True,
+        )
     # Executable and other resources
     resources = [
         adj_path_for_windows_rsync(
@@ -241,12 +239,6 @@ def merge_into_dist(output_folder: Path, pyqt_src_path: Path):
     )
     # Linux ARM workarounds
     if arm64_linux:
-        with open(output_folder / "qt.conf", "w") as file:
-            file.write(
-                """[Paths]
-Prefix = lib/PyQt5/Qt5
-"""
-            )
         # copy orjson ends up broken; copy from venv
         subprocess.run(
             [

qt/package/prepare-system-pyqt.sh

@@ -1,39 +0,0 @@
-#!/bin/bash
-#
-# This script copies a system-installed PyQt. Written for Debian Bullseye;
-# will need adjusting for other platforms.
-
-set -e
-
-sudo apt install -y python3-pyqt5.{qtwebengine,qtmultimedia} patchelf
-
-pyqtBase=/usr/lib/python3/dist-packages/PyQt5
-qtData=/usr/share/qt5
-qtLibBase=/usr/lib/aarch64-linux-gnu
-qtLibExtra=$qtLibBase/qt5
-
-outDir=~/PyQtPrepared/PyQt5/
-qtOutputBase=$outDir/Qt5
-rm -rf $outDir
-mkdir -p $qtOutputBase
-
-# pyqt
-rsync -ai --exclude-from=qt.exclude --exclude Qt5 \
-    $pyqtBase/ $outDir/
-patchelf --set-rpath '$ORIGIN/Qt5/lib' $outDir/*.so
-
-# qt libs
-rsync -ai $qtLibBase/libQt5* $qtOutputBase/lib/
-patchelf --set-rpath '$ORIGIN' $qtOutputBase/lib/*.so.*
-
-# qt libexec/plugins
-rsync -ai --exclude=qml $qtLibExtra/ $qtOutputBase/
-patchelf --set-rpath '$ORIGIN/../../lib' $qtOutputBase/plugins/*/*.so
-patchelf --set-rpath '$ORIGIN/../lib' $qtOutputBase/libexec/QtWebEngineProcess
-cat > $qtOutputBase/libexec/qt.conf <<EOF
-[Paths]
-Prefix = ..
-EOF
-
-# qt translations/resources
-rsync -ai $qtData/ $qtOutputBase/