flake.nix

# ==============================================================================
# Copyright (c) 2016-present Allan CORNET (Nelson)
# ==============================================================================
# This file is part of the Nelson.
# =============================================================================
# LICENCE_BLOCK_BEGIN SPDX-License-Identifier: LGPL-3.0-or-later
# LICENCE_BLOCK_END
# ==============================================================================
{
  inputs = {
    nixpkgs.url = "github:NixOS/nixpkgs/nixos-unstable";
    flake-utils.url = "github:numtide/flake-utils";
  };
  outputs = { nixpkgs, flake-utils, ... }:
    flake-utils.lib.eachDefaultSystem (system:
      let
        # System override for macOS
        effectiveSystem = if builtins.match ".*-darwin" system != null then "aarch64-darwin" else system;
        pkgs = import nixpkgs { system = effectiveSystem; };
        isDarwin = pkgs.stdenv.isDarwin;
      in {
        devShells.default = with pkgs; mkShell {
          name = "Default development shell";

          packages = [
            nixpkgs-fmt
            cmake
            pkg-config
            gnumake
            ninja
            just
            git
            nodejs_20
          ] ++ lib.optionals (!isDarwin) [
            xvfb-run
            gdb
          ]++ lib.optionals (isDarwin) [
            lldb
          ];

          nativeBuildInputs = [
            cmake
            pkg-config
            qt6.qtbase
            qt6.wrapQtAppsHook
            makeWrapper
          ];

          buildInputs = [
            qt6.full
            mpich
            fftw
            fftwFloat
            icu
            zlib
            boost
            openssl
            hdf5
            curl
            libgit2
            libsndfile
            eigen
            portaudio
            openblasCompat
            taglib
            matio
            giflib
            libtiff
            python313
          ] ++ lib.optionals isDarwin [
            llvmPackages.libcxx
            llvmPackages.openmp
            coreutils
            libiconv
            darwin.apple_sdk.frameworks.CoreAudio
            darwin.apple_sdk.frameworks.Accelerate
          ] ++ lib.optionals (!isDarwin) [
            alsa-oss
            alsa-lib
            libjack2
          ];

          shellHook = ''
            export ${if isDarwin then "DYLD_LIBRARY_PATH" else "LD_LIBRARY_PATH"}="${
              pkgs.lib.makeLibraryPath (
                [
                  zlib
                  fftw
                  fftwFloat
                  openblasCompat
                  icu
                  boost
                  openssl
                  mpi
                  hdf5
                  curl
                  libgit2
                  libsndfile
                  portaudio
                  eigen
                  taglib
                  matio
                  qt6.full
                  giflib
                  libtiff
                  python313
                ]
                ++ lib.optionals isDarwin [
                  llvmPackages.openmp
                  darwin.apple_sdk.frameworks.CoreAudio
                  darwin.apple_sdk.frameworks.Accelerate
                ]
                ++ lib.optionals (!isDarwin) [
                  pipewire.jack
                ]
              )
            }:$${if isDarwin then "DYLD_LIBRARY_PATH" else "LD_LIBRARY_PATH"}"

            if [ -f package.json ] && [ ! -d node_modules ]; then
              echo "📦 Installing npm dependencies..."
              npm install
            fi

            # Export prefix variables for specific libraries
            export NIX_LIBTIFF_PREFIX="${pkgs.libtiff}"
            export NIX_GIFLIB_PREFIX="${pkgs.giflib}"
            export LC_ALL=C
            export QT_XCB_GL_INTEGRATION=none
            export NIX_ENFORCE_NO_NATIVE=0

            echo ""
            echo "⭐ Welcome to the Nelson development environment ⭐"
            echo ""
          '';
        };
      });
}
# ==============================================================================