init

app/shell.nix

@@ -0,0 +1,32 @@
+{ pkgs ? import <nixpkgs> { } }:
+
+let
+  my-python = pkgs.python312;
+  python-with-my-packages = my-python.withPackages
+    (p: with p; [
+      # flask
+    ]);
+  lib-path = with pkgs; lib.makeLibraryPath [
+  ];
+in pkgs.mkShell {
+  buildInputs = [
+    python-with-my-packages
+  ];
+shellHook = ''
+    SOURCE_DATE_EPOCH=$(date +%s)
+    export "LD_LIBRARY_PATH=$LD_LIBRARY_PATH:${lib-path}"
+    VENV=.venv
+
+    if test ! -d $VENV; then
+      python3 -m venv $VENV
+    fi
+    source ./$VENV/bin/activate
+    export PYTHONPATH=`pwd`/$VENV/${python-with-my-packages.sitePackages}/
+    # export PYTHONPATH=`pwd`/$VENV/${python-with-my-packages.sitePackages}/:$PYTHONPATH
+    pip install -r requirements.txt
+  '';
+
+  postShellHook = ''
+    ln -sf ${python-with-my-packages.sitePackages}/* ./.venv/lib/python3.12/site-packages
+  '';
+}