default.nix

let
  sources = import ./nix/sources.nix;
  pkgs = import sources.nixpkgs { config = {}; overlays = []; };
  paths = [ pkgs.hello ];
in {
  closure = pkgs.runCommand "closure" {
    buildInputs = with pkgs; [ nix mktorrent ];
    closureInfo = pkgs.closureInfo { rootPaths = paths; };
  } ''
    export NIX_STATE_DIR=$NIX_BUILD_TOP/state
    nix-store --load-db < $closureInfo/registration
    nix copy --to file:///$NIX_BUILD_TOP/cache $(cat $closureInfo/store-paths)
    ls $NIX_BUILD_TOP/cache -lh

    mktorrent --output=whatever.torrent --no-date --web-seed=http://whatever $NIX_BUILD_TOP/cache

    mkdir -p $out
    mv -vi whatever.torrent $out/

    # option 1
    cat > $out/upload <<EOF
    #!/bin/sh
    nix sign-paths --key-file "\$2" -r ${toString paths}
    nix copy --to "\$1" ${toString paths}
    EOF
    chmod +x $out/upload

    # option 2
    mv -vi $NIX_BUILD_TOP/cache $out/
  '';
}