nixos/local/pkgs/vasp/nvidia/default.nix

{
  buildFHSEnv, writeScript, stdenvNoCC, requireFile, substituteAll, symlinkJoin,
  config, cudaCapabilities ? config.cudaCapabilities, nvhpcArch ? config.nvhpcArch or "px", additionalCommands ? "",
  nvhpc, lmod, mkl, gfortran, rsync, which, hdf5, wannier90, zlib
}:
let
  sources = import ../source.nix { inherit requireFile; };
  buildEnv = buildFHSEnv
  {
    name = "buildEnv";
    targetPkgs = _: [ zlib ];
  };
  buildScript = writeScript "build"
  ''
    . ${lmod}/share/lmod/lmod/init/bash
    module use ${nvhpc}/share/nvhpc/modulefiles
    module load nvhpc
    mkdir -p bin
    make DEPS=1 -j$NIX_BUILD_CORES
  '';
  include = version: substituteAll
  {
    src = ./makefile.include-${version};
    cudaCapabilities = builtins.concatStringsSep "," (builtins.map
      (cap: "cc${builtins.replaceStrings ["."] [""] cap}")
      cudaCapabilities);
    inherit nvhpcArch;
  };
  vasp = version: stdenvNoCC.mkDerivation rec
  {
    pname = "vasp-nvidia";
    inherit version;
    src = sources.${version};
    configurePhase =
    ''
      cp ${include version} makefile.include
      cp ${../constr_cell_relax.F} src/constr_cell_relax.F
    '';
    enableParallelBuilding = true;
    buildInputs = [ mkl hdf5 wannier90 ];
    nativeBuildInputs = [ gfortran rsync which ];
    MKLROOT = mkl;
    HDF5_ROOT = hdf5;
    WANNIER90_ROOT = wannier90;
    buildPhase = "${buildEnv}/bin/buildEnv ${buildScript}";
    installPhase =
    ''
      mkdir -p $out/bin
      for i in std gam ncl; do cp bin/vasp_$i $out/bin/vasp-$i; done
    '';
    dontFixup = true;
    requiredSystemFeatures = [ "gccarch-exact-${stdenvNoCC.hostPlatform.gcc.arch}" "big-parallel" ];
  };
  startScript = { version, variant }: writeScript "vasp-nvidia-${version}"
  ''
    . ${lmod}/share/lmod/lmod/init/bash
    module use ${nvhpc}/share/nvhpc/modulefiles
    module load nvhpc

    # if OMP_NUM_THREADS is not set, set it according to SLURM_CPUS_PER_TASK or to 1
    if [ -z "''${OMP_NUM_THREADS-}" ]; then
      if [ -n "''${SLURM_CPUS_PER_TASK-}" ]; then
        OMP_NUM_THREADS=$SLURM_CPUS_PER_TASK
      else
        OMP_NUM_THREADS=1
      fi
    fi
    export OMP_NUM_THREADS

    ${additionalCommands}

    ${
      if variant == "env" then ''exec "$@"''
      else
      ''
        if [ -n "''${SLURM_JOB_ID-}" ]; then
          # srun should be in PATH
          exec mpirun ${vasp version}/bin/vasp-${variant}
        else
          exec mpirun -np 1 ${vasp version}/bin/vasp-${variant}
        fi
      ''
    }
  '';
  runEnv = { version, variant }: let shortVersion = builtins.replaceStrings ["."] [""] version; in buildFHSEnv
  {
    name = "vasp-nvidia-${shortVersion}${if variant == "" then "" else "-${variant}"}";
    targetPkgs = _: [ zlib (vasp version) ];
    runScript = startScript { inherit version; variant = if variant == "" then "std" else variant; };
  };
in builtins.mapAttrs
  (version: _: symlinkJoin
  {
    name = "vasp-nvidia-${version}";
    paths = builtins.map (variant: runEnv { inherit version variant; }) [ "" "env" "std" "gam" "ncl" ];
  })
  sources