texTemplate/flake.nix

{
  description = "Put a short description here";

  inputs = {
    nixpkgs = {
      type = "indirect";
      id = "nixpkgs";
    };
  };

  outputs = {self, nixpkgs} :
  let
    #Generate a user-friendly version number.
    version = builtins.substring 0 8 self.lastModifiedDate;

    # System types to support.
    supportedSystems = [ "x86_64-linux" "x86_64-darwin" "aarch64-linux" "aarch64-darwin" ];

    # Helper function to generate an attrset '{ x86_64-linux = f "x86_64-linux"; ... }'.
    forAllSystems = nixpkgs.lib.genAttrs supportedSystems;

    # Nixpkgs instantiated for supported system types.
    nixpkgsFor = forAllSystems (system: import nixpkgs { inherit system; });

  in {
    packages = forAllSystems (system:
      let
        pkgs = nixpkgsFor.${system};
        # LaTex package dependencies
        latexdeps = {inherit (pkgs.texlive) scheme-small;};
        latex = pkgs.texlive.combine latexdeps;
        latexrun = pkgs.latexrun;
      in {
        default = pkgs.stdenvNoCC.mkDerivation {
          name = "output.pdf";
          buildInputs = [latex latexrun];
          src = self;
          buildPhase = ''
            latexrun -o output.pdf src/Main.tex
          '';
          installPhase = ''
            mkdir -p $out
            cp output.pdf $out/output.pdf
          '';
        };
      }
    );
    devShells = forAllSystems  (system:
      let
        pkgs = nixpkgsFor.${system};
        # Needs to be in sync with latex dependencie above, Don't
        # know how to fix this as we need to now the system to get
        # the packages. The plus side is you can have different packages in your
        # development environment than in your build one.
        latexdeps = {inherit (pkgs.texlive) scheme-small;};
        latex = pkgs.texlive.combine latexdeps;
        latexrun = pkgs.latexrun;

      in ( rec {
        default = kakoune;
        kakoune =
          let
            texlab = pkgs.texlab;
            myKakoune =
               let
                 # this could also be done by generating toml with the
                 # nixpkgs lib, but I'm lazy
                 kak-lsp-config = pkgs.writeTextFile {
                   name = "kak-lsp-config.toml";
                   text = ''
                     [language.latex]
                     filetypes = ["latex"]
                     roots = [".git"]
                     command = "texlab"
                   '';
                 };
                 config = pkgs.writeTextFile (rec {
                   name = "kakrc.kak";
                   destination = "/share/kak/autoload/${name}";
                   text = ''
                     colorscheme solarized-dark
                     set global tabstop 2
                     set global indentwidth 2
                     eval %sh{kak-lsp  --kakoune --session $kak_session -c ${kak-lsp-config}}
                     hook global WinSetOption filetype=(latex) %{
                       lsp-auto-hover-enable
                       lsb-enable-window
                     }
                   '';
                 });
               in
                 pkgs.kakoune.override {
                   plugins = with pkgs.kakounePlugins; [kak-lsp config];
                 };
          in
            pkgs.mkShellNoCC {
              packages = [myKakoune texlab pkgs.git latex latexrun pkgs.zathura];
              shellHook = ''
                alias ..="cd .."
                export KAKOUNE_CONFIG_DIR="/your/user/config/directory"
                kak -d -s latexPackage &
                alias vim="kak -c latexPackage"
              '';
        };
        texstudio =
          pkgs.mkShellNoCC {
            packages = [pkgs.texstudio pkgs.git latex latexrun];
        };
            
        texmaker =
          pkgs.mkShellNoCC {
            packages = [pkgs.texmaker pkgs.git latex latexrun];
        };
      })
    );
  };
}