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path: root/modules/devenv/languages/latex.nix
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{
  config,
  lib,
  pkgs,
  devenv,
  ...
}:
let
  cfg = config.languages.texlive;
  pdfModes = {
    "pdflatex" = "1";
    "ps2pdf" = "2";
    "dvi2pdf" = "3";
    "lualatex" = "4";
    "xelatex" = "5";
  };
  dviModes = {
    "latex" = "1";
    "lualatex" = "2";
  };
  latexmkrc =
    with cfg.latexmk;
    let
      pdfMode = with output.pdf; if enable then pdfModes."${mode}" else "0";
      dviMode = with output.dvi; if enable then dviModes."${mode}" else "0";
      psMode = if output.ps.enable then "1" else "0";
    in
    lib.optionalString (extraFlags != [ ]) ''
      set_tex_cmds('${lib.concatStringsSep " " extraFlags}');
    ''
    + ''
      $pdf_mode = ${pdfMode};
      $dvi_mode = ${dviMode};
      $ps_mode = ${psMode};

      $clean_ext = '${builtins.concatStringsSep " " cfg.latexmk.cleanExt}';
      $clean_full_ext = '${builtins.concatStringsSep " " cfg.latexmk.cleanFullExt}';

      ${extraConfig}
    '';
  packages = cfg.packages cfg.base;
  packagesRequireShellEscape = packages ? minted;
  texlive = cfg.base.combine packages;
in
{
  disabledModules = [ (devenv.modules + "/languages/texlive.nix") ];

  options.languages.texlive = {
    enable = lib.mkEnableOption "TeX Live";
    base = lib.mkOption {
      default = pkgs.texlive;
      description = "TeX Live package set to use";
    };
    packages = lib.mkOption {
      type =
        with lib.types;
        functionTo (
          attrsOf (submodule {
            options.pkgs = lib.mkOption {
              type = listOf (either package (attrsOf anything));
            };
          })
        );
      default = tl: { inherit (tl) scheme-medium; };
      description = "Packages available to TeX Live.";
    };

    latexmk = {
      enable = lib.mkEnableOption "latexmk";
      cleanExt = lib.mkOption {
        type = with lib.types; listOf str;
        default = [
          "fdb_latexmk"
          "nav"
          "prv_%R.fmt"
          "prv_%R.log"
          "prv/*/*"
          "prv/*"
          "prv"
          "-SAVE-ERROR"
          "snm"
          "vrb"
        ];
      };
      cleanFullExt = lib.mkOption {
        type = with lib.types; listOf str;
        default = [ "bbl" ];
      };
      shellEscape.enable = lib.mkEnableOption "shell escaping";
      extraFlags = lib.mkOption {
        type = with lib.types; listOf str;
        default = [ ];
        example = [ "--interaction=nonstopmode" ];
      };
      output =
        let
          mkOutputOptions =
            formats:
            lib.mapAttrs (
              format: extra:
              lib.recursiveUpdate {
                enable = lib.mkEnableOption "${format} output";
              } extra
            ) formats;
        in
        mkOutputOptions {
          pdf = {
            enable.default = true;
            mode = lib.mkOption {
              type = lib.types.enum (lib.attrNames pdfModes);
              default = "lualatex";
              description = "How to generate the pdf file.";
            };
          };
          dvi = {
            mode = lib.mkOption {
              type = lib.types.enum (lib.attrNames dviModes);
              default = "latex";
              description = "How to generate the dvi file.";
            };
          };
          ps = { };
        };
      extraConfig = lib.mkOption {
        type = lib.types.lines;
        default = "";
        description = "Extra configuration to put inside the RC file.";
      };
    };
  };

  config = lib.mkIf cfg.enable (
    lib.mkMerge [
      {
        packages = [ texlive ];
        gitignore = {
          TeX.enable = true;
          extra = ''
            *-SAVE-ERROR
          '';
        };
      }
      (lib.mkIf cfg.latexmk.enable {
        languages.texlive = {
          packages = tl: { inherit (tl) latexmk; };
          latexmk = {
            shellEscape.enable = lib.mkDefault packagesRequireShellEscape;
            extraFlags = lib.optional cfg.latexmk.shellEscape.enable "-shell-escape";
          };
        };

        scripts.latexmk.exec = ''
          ${texlive}/bin/latexmk -r ${config.devenv.root}/.latexmkrc $@
        '';

        gitignore.LaTeX.uncomment =
          with cfg.latexmk.output;
          lib.optional pdf.enable "*.pdf" ++ lib.optional dvi.enable "*.dvi" ++ lib.optional ps.enable "*.ps";

        dotfiles.".latexmkrc" = {
          gitignore = lib.mkDefault false;
          text = latexmkrc;
        };
      })
    ]
  );
}