default.nix file for qt6 uis

default.nix

@@ -0,0 +1,82 @@
+with (import <nixpkgs> {});
+with python312Packages;
+let
+  glibStorePath = lib.getLib glib;
+  qtpyStorePath = lib.getLib qtpy;
+  pyqt6StorePath = lib.getLib pyqt6;
+  pyqt6SipStorePath = lib.getLib pyqt6-sip;
+  qt6baseStorePath = lib.getLib qt6.qtbase;
+  rapidfuzzStorePath = lib.getLib rapidfuzz;
+  qdarkstyleStorePath = lib.getLib qdarkstyle;
+in
+stdenv.mkDerivation {
+  name = "piker-qt6-poetry-shell";
+  buildInputs = [
+    # System requirements.
+    glib
+    qt6.qtbase
+    libgcc.lib
+
+    # Python requirements.
+    python312Full
+    poetry-core
+    qdarkstyle
+    rapidfuzz
+    pyqt6
+    qtpy
+  ];
+  src = null;
+  shellHook = ''
+    set -e
+
+    export LD_LIBRARY_PATH=$LD_LIBRARY_PATH:${libgcc.lib}/lib:${glibStorePath}/lib
+
+    # Set the Qt plugin path
+    # export QT_DEBUG_PLUGINS=1
+
+    QTBASE_PATH="${qt6baseStorePath}"
+    echo "qtbase path:    $QTBASE_PATH"
+    echo ""
+    export QT_PLUGIN_PATH="$QTBASE_PATH/lib/qt-6/plugins"
+    export QT_QPA_PLATFORM_PLUGIN_PATH="$QT_PLUGIN_PATH/platforms"
+    echo "qt plugin path: $QT_PLUGIN_PATH"
+    echo ""
+
+    # Maybe create venv & install deps
+    poetry install --with uis
+
+    # Use pyqt6 from System, patch activate script
+    ACTIVATE_SCRIPT_PATH="$(poetry env info --path)/bin/activate"
+
+    export RPDFUZZ_PATH="${rapidfuzzStorePath}/lib/python3.12/site-packages"
+    export QDRKSTYLE_PATH="${qdarkstyleStorePath}/lib/python3.12/site-packages"
+    export QTPY_PATH="${qtpyStorePath}/lib/python3.12/site-packages"
+    export PYQT6_PATH="${pyqt6StorePath}/lib/python3.12/site-packages"
+    export PYQT6_SIP_PATH="${pyqt6SipStorePath}/lib/python3.12/site-packages"
+    echo "rapidfuzz at:   $RPDFUZZ_PATH"
+    echo "qdarkstyle at:  $QDRKSTYLE_PATH"
+    echo "qtpy at:        $QTPY_PATH" 
+    echo "pyqt6 at:       $PYQT6_PATH"
+    echo "pyqt6-sip at:   $PYQT6_SIP_PATH"
+    echo ""
+
+    PATCH="export PYTHONPATH=\""
+
+    PATCH="$PATCH\$RPDFUZZ_PATH"
+    PATCH="$PATCH:\$QDRKSTYLE_PATH"
+    PATCH="$PATCH:\$QTPY_PATH"
+    PATCH="$PATCH:\$PYQT6_PATH"
+    PATCH="$PATCH:\$PYQT6_SIP_PATH"
+
+    PATCH="$PATCH\""
+
+    if grep -q "$PATCH" "$ACTIVATE_SCRIPT_PATH"; then
+        echo "venv is already patched."
+    else
+        echo "patching $ACTIVATE_SCRIPT_PATH to use pyqt6 from nixos..."
+        sed -i "\$i$PATCH" $ACTIVATE_SCRIPT_PATH
+    fi
+
+    poetry shell
+  '';
+}