resume/flake.nix

{
  description = "Resume";

  inputs = {
    nixpkgs.url = github:NixOS/nixpkgs/nixos-unstable;
  };

  outputs = {
    self,
    nixpkgs,
    flake-utils,
  }: let
    pkgs = import nixpkgs {
      inherit system;
    };
    lib = pkgs.lib;
    system = "x86_64-linux";
    nerdfonts-hack = pkgs.nerdfonts.override {
      fonts = ["Hack"];
    };
    tex = pkgs.texlive.combine {
      inherit (pkgs.texlive) scheme-basic latex-bin latexmk enumitem multirow titlesec xcolor fontspec chktex latexindent;
    };
    vars = ["email" "phonenumber"];
    # Create definitions like \def\email{$EMAIL}
    # Each \email command in the tex document will be populated by an EMAIL
    # variable (can be set as an environment variable)
    texvars = toString (lib.concatMapStrings (x: ''\def\${x}{${"$" + lib.toUpper x}}'') vars);
  in {
    packages.${system} = {
      # inherit system;
      alejandro-resume = pkgs.stdenvNoCC.mkDerivation rec {
        name = "alejandro-resume";
        src = self;
        propogatedBuildInputs = [pkgs.coreutils nerdfonts-hack tex];
        phases = ["unpackPhase" "buildPhase" "installPhase"];
        SCRIPT = ''
          #!/usr/bin/env bash

          prefix=${builtins.placeholder "out"}
          export PATH="${lib.makeBinPath propogatedBuildInputs}";
          DEBUG=false
          DIR=$(mktemp -d)
          RES=$(pwd)/alejandro_resume.pdf
          LOG=$(pwd)/alejandro_resume.log

          function usage {
            echo "Usage: $(basename $0) [-h] [-d] [-e EMAIL] [-p PHONENUMBER]"
            echo '    -h              Prints this usage message.'
            echo ""
            echo '    -d              Saves latexmk log file (will be named alejandro_resume.log)'
            echo ""
            echo '    -e EMAIL        Sets email address used when building document.'
            echo '                    Can also be set with EMAIL environment variable.'
            echo ""
            echo '    -p PHONENUMBER  Sets phone number used when building the document.'
            echo '                    Can also be set with PHONENUMBER environment variable.'
          }

          while getopts ':de:p:h' flag; do
            case $flag in
              'd') DEBUG=true;;
              # Overrides EMAIL and PHONENUMBER envvars if set
              'e') EMAIL="$OPTARG";;
              'p') PHONENUMBER="$OPTARG";;
              'h') usage && exit;;
              ?) usage && exit 1;;
            esac
          done

          cd $prefix/share
          mkdir -p "$DIR/.texcache/texmf-var"

          env TEXFMHOME="$DIR/.texcache" TEXMFVAR="$DIR/.texcache/texmf-var" \
              OSFONTDIR=${nerdfonts-hack}/share/fonts \
            latexmk -interaction=nonstopmode -pdf -lualatex \
            -output-directory="$DIR" \
            -pretex="${texvars}"\
            -usepretex alejandro_resume.tex

          mv "$DIR/alejandro_resume.pdf" "$RES"

          if $DEBUG; then
            mv "$DIR/alejandro_resume.log" "$LOG"
          fi

          rm -rf $DIR
        '';
        buildPhase = ''
          printenv SCRIPT > alejandro-resume
        '';
        installPhase = ''
          mkdir -p $out/{bin,share}
          cp alejandro_resume.tex $out/share/alejandro_resume.tex
          cp alejandro-resume $out/bin/alejandro-resume
          chmod u+x $out/bin/alejandro-resume
        '';
      };
      default = self.packages.${system}.alejandro-resume;
    };

    devShells.${system} = {
      default = pkgs.mkShell {
        name = "default";
        buildInputs = with pkgs; [
          alejandra
          direnv
          git
          pre-commit
          tex #TODO: Is this necessary?
          zathura # PDF Viewer
        ];

        shellHook = ''
          PATH=${pkgs.writeShellScriptBin "nix" ''
            ${pkgs.nixVersions.stable}/bin/nix --experimental-features "nix-command flakes" "$@"
          ''}/bin:$PATH

          if [ ! -f ".git/hooks/pre-commit" ]; then
            pre-commit install &> /dev/null
          fi
        '';
      };
    };
  };
}