flake.nix

{
  description = "Nix Development Flake for Quasar";

  inputs = {
    flake-utils.url = "github:numtide/flake-utils";
    nixpkgs_unstable.url = "github:NixOS/nixpkgs/nixos-unstable";
    nixpkgs.url = "github:NixOS/nixpkgs/nixos-25.11";
  };

  outputs = { self, nixpkgs, nixpkgs_unstable, flake-utils }:

    flake-utils.lib.eachDefaultSystem (system:
      let
        # https://nixos.wiki/wiki/Rust
        # https://nixos.org/manual/nixpkgs/stable/#rust
        # if we want a specific rust version:
        # rust-overlay.url = "github:oxalica/rust-overlay";
        pkgs = import nixpkgs { inherit system; };
        pkgs_unstable = import nixpkgs_unstable { inherit system; };
        python = pkgs.python310;

        # this is all tauri-related stuff
        libraries = with pkgs; [

          # tauri deps
          at-spi2-atk
          atkmm
          cairo
          gdk-pixbuf
          glib
          gobject-introspection
          gobject-introspection.dev
          gtk3
          harfbuzz
          librsvg
          libsoup_3
          pango
          webkitgtk_4_1
          webkitgtk_4_1.dev
          #webkitgtk
          #gtk3
          #cairo
          #gdk-pixbuf
          #glib
          #dbus
          #openssl_3
          #librsvg
          #libsoup

          # this is needed for appimage by build_appimage.sh ...
          #libgpg-error 
          #xorg.libX11
          #xorg.libSM
          #xorg.libICE
          #xorg.libxcb
          #fribidi
          #fontconfig
          #libthai
          #harfbuzz
          #freetype
          #libglvnd
          #mesa
          #libdrm
          cargo-tauri
          rustup # needed for adding new targets e.g. wasm-bindgen!
          wasm-pack # we can use this to package rust code for webassembly
          # add rust toolchain
          rustc
          rustfmt # needed in order to compile rumoca
          cargo

          # for cypress e2e testing
          glib
          nss
          nspr
          at-spi2-atk
          cups
          dbus
          libdrm
          gtk2
          gtk3
          pango
          cairo
          alsa-lib
          xorg.libX11
          xorg.libXcomposite
          xorg.libXdamage
          xorg.libXext
          xorg.libXfixes
          xorg.libXrandr
          xorg.libxcb
          libxkbcommon
          #xorg
          mesa
          libgbm # for libgbm
          expat
        ];
        packages = with pkgs; [
          # rust
          #rustfmt
          #clippy
          #rustc
          #cargo
          #cargo-deny
          #cargo-edit
          #cargo-watch
          #llvmPackages.bintools
          #rustup
          #rust-analyzer
          #rust-src

          # for tauri
          curl
          wget
          pkg-config

          # for running local llm models:
          # not sure, why..  but this isn't working, currently.. so we are using docker
          # local-ai

          # node
          # yarn
          # we disable yarn-berry, because it is installed using corepack!
          # yarn-berry
          nodejs_22

          # helpers
          graphviz # we are using this with "madge" in order to display dependency graphs...

          # supabase
          docker-compose
          # colima # also doesn't work yet somehow...
          # podman # doesn't work with supabase I think
          pkgs_unstable.stripe-cli

          pkgs_unstable.deno

          python # this is needed for newer quasar versions apparently...
          # not sure..  but if I use our git-filter repo form main nix store, it doesn't work.. maybe becuase of cinflicting python versions?
          # git-filter-repo 
          kdiff3

          # we use this to search for missing libraries with the same version as this
          # project here.
          # run: 
          # > nix-index
          # > nix-locate libgbm.so.1
          nix-index
        ];
      in {
        devShells.default = pkgs.mkShell rec {
          # pure  = true;                   # ← turn on “pure” mode
          name = "xyntopia_gui";
          # TODO: what is this for? nativeBuildInputs = [ pkgs.bashInteractive ];
          buildInputs = libraries ++ packages;
          # the following comes from here: https://tauri.app/start/prerequisites/
          # but by declaring LD_LIBRARY_PATH we might have done it correctly already ;)
          # and thats why we're commenting it out...
          #PKG_CONFIG_PATH = "${glib.dev}/lib/pkgconfig:${libsoup_3.dev}/lib/pkgconfig:${webkitgtk_4_1.dev}/lib/pkgconfig:${at-spi2-atk.dev}/lib/pkgconfig:${gtk3.dev}/lib/pkgconfig:${gdk-pixbuf.dev}/lib/pkgconfig:${cairo.dev}/lib/pkgconfig:${pango.dev}/lib/pkgconfig:${harfbuzz.dev}/lib/pkgconfig";
          # propagatedBuildInputs = libraries;  # your GTK/WebKit/etc libs

          shellHook = ''
            # python poetry related stuff
            unset SOURCE_DATE_EPOCH
            unset LD_PRELOAD

            # Environment variables
            # fixes libstdc++ issues, libz.so.1 issues
            export LD_LIBRARY_PATH="${pkgs.stdenv.cc.cc.lib}/lib/:${
              pkgs.lib.makeLibraryPath buildInputs
            }";

            export NODE_OPTIONS="--max-old-space-size=8192"
            echo "increasing node memory allocation to $NODE_OPTIONS"



            if [ -f ./.env ]; then
              set -a  # automatically export all variables
              source ./.env
              set +a
            fi

            export PATH="$(pwd)/node_modules/.bin:$PATH:$HOME/.cargo/bin"

            export LD_LIBRARY_PATH=${
              pkgs.lib.makeLibraryPath libraries
            }:$LD_LIBRARY_PATH
            export XDG_DATA_DIRS=${pkgs.gsettings-desktop-schemas}/share/gsettings-schemas/${pkgs.gsettings-desktop-schemas.name}:${pkgs.gtk3}/share/gsettings-schemas/${pkgs.gtk3.name}:$XDG_DATA_DIRS


            # ── Corepack cache location ─────────────────────────────────────────────────────
            # By default, Corepack stores downloaded package managers (e.g. Yarn CLI JS) in
            # $COREPACK_HOME. If unset, it uses a global cache outside the repo (e.g. ~/.cache/node/corepack).
            #
            # In our old setup, we forced COREPACK_HOME into ./.corepack/home (inside the repo)
            # so everything was self-contained. However:
            #   • Our repo’s package.json sets `"type": "module"`, so any JS under it is treated as ESM.
            #   • Yarn’s CLI bundle contains `require()` calls, which fail under ESM with:
            #       "Error: Dynamic require of 'util' is not supported"
            #   • This broke Yarn in some projects (notably when package.json was at repo root).
            #
            # Fix: move COREPACK_HOME to a location *outside* any `"type": "module"` package boundary
            #      (e.g. $HOME/.cache/corepack-home) so Node treats Yarn’s CLI as CommonJS.
            #      We still keep shims (yarn, pnpm, etc.) in ./.corepack/bin so they are project-local.
            #
            # Nix note: use ''${...} to pass Bash \$\{...} through without Nix interpolating it.
            ###  ability to use modern yarn
            # Put shims & downloaded package managers inside repo
            # this helps with our new yarn version using corepack on nixos!


            # ── Corepack shims (idempotent & self-healing) ────────────────────────────────
            # Keep Corepack cache outside the repo (CJS-safe),
            # but regenerate repo-local shims when Node/Corepack changes.

            export COREPACK_HOME="''${XDG_CACHE_HOME:-$HOME/.cache}/corepack-home"
            export PATH="$(pwd)/.corepack/bin:$PATH"

            COREPACK_BIN="$(pwd)/.corepack/bin"
            COREPACK_MARKER="$COREPACK_BIN/.node-version"

            mkdir -p "$COREPACK_BIN"

            NODE_VERSION="$(node -v 2>/dev/null || true)"

            if [ ! -f "$COREPACK_MARKER" ] || ! grep -qx "$NODE_VERSION" "$COREPACK_MARKER"; then
              echo "[devShell] Refreshing Corepack shims (node $NODE_VERSION)"

              rm -f \
                "$COREPACK_BIN/yarn" \
                "$COREPACK_BIN/yarnpkg" \
                "$COREPACK_BIN/pnpm" \
                "$COREPACK_BIN/pnpx"

              corepack enable --install-directory="$COREPACK_BIN"
              echo "$NODE_VERSION" > "$COREPACK_MARKER"
            fi
          '';

          # fixes xcb issues :
          # QT_PLUGIN_PATH=${qt5.qtbase}/${qt5.qtbase.qtPluginPrefix}

          # fixes libstdc++ issues and libgl.so issues
          #LD_LIBRARY_PATH=${stdenv.cc.cc.lib}/lib/:/run/opengl-driver/lib/
        };
      });
}