flake.nix

{
  description = "LaTeX document";
  inputs = {
    nixpkgs.url = github:NixOS/nixpkgs/nixos-23.05;
    flake-utils.url = github:numtide/flake-utils;
  };
  outputs = { self, nixpkgs, flake-utils }:
    flake-utils.lib.eachDefaultSystem (system:
      let
        docname = "doc";
        pkgs = nixpkgs.legacyPackages.${system};
        tex = pkgs.texlive.combine {
          inherit
            (pkgs.texlive)
            scheme-small xetex pgfplots amsmath hyperref bidi zref textpos xepersian
            isodate substr titlesec listings enumitem soul
            svg trimspaces transparent

            # papers
            biblatex

            # xournal++
            standalone varwidth scontents

            # formatter
            latexindent

            # constant builder
            latexmk
            ;
        };
        deps = with pkgs; [ tex coreutils just bash texlab ];
      in
      rec {
        devShells.default = pkgs.mkShell {
          buildInputs = deps;
          shellHook = ''
            export DOCNAME=${docname}
          '';
        };
        packages = {
          document = pkgs.stdenvNoCC.mkDerivation rec {
            name = docname;
            src = self;
            buildInputs = deps;
            phases = [ "unpackPhase" "buildPhase" "installPhase" ];
            buildPhase = ''
              export DOCNAME="${docname}"
              export PATH="${pkgs.lib.makeBinPath buildInputs}"
              just build
            '';
            installPhase = ''
              mkdir -p $out
              cp ${docname}.pdf $out/
            '';
          };
        };
        packages.default = packages.document;
      });
}