# TeX Live for pandoc PDF output: pandoc shells out to a LaTeX engine, so PDF
# conversion needs a TeX distribution (other formats — html, docx, md — do not).
# The package set is an option so a consumer can swap the scheme without editing
# this module: scheme-medium covers pandoc's default LaTeX template; override
# for a larger set (missing .sty files) or a smaller one.
#
# TeX Live's font cache and config trees default to ~/.texlive<year> and ~/texmf
# (written on the first PDF build). The TEXMF* vars route them to XDG dirs.

{ config, lib, pkgs, ... }:

{
  options.local.texlive.package = lib.mkOption {
    type = lib.types.package;
    default = pkgs.texlive.withPackages (ps: [ ps.scheme-medium ]);
    defaultText = lib.literalExpression
      "pkgs.texlive.withPackages (ps: [ ps.scheme-medium ])";
    description = "TeX Live package set. Override for a larger/smaller scheme.";
  };

  config = {
    home.packages = [ config.local.texlive.package ];

    # texmf-var is regenerable font/format cache → cacheHome; the other two hold
    # user config/data trees.
    home.sessionVariables = {
      TEXMFHOME   = "${config.xdg.dataHome}/texmf";
      TEXMFVAR    = "${config.xdg.cacheHome}/texlive/texmf-var";
      TEXMFCONFIG = "${config.xdg.configHome}/texlive/texmf-config";
    };
  };
}