typst-init-example/erv/lb3/flake.nix

{
  description = "A Nix flake for compiling NURE works";

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

    typix.url = "github:loqusion/typix";
    typix.inputs.nixpkgs.follows = "nixpkgs";

    flake-utils.url = "github:numtide/flake-utils";

    # local-nure-upstream.url = "git+ssh://gitea@linerds.us/unexplrd/typst_nure_template?ref=multi-pages";
    # local-nure-upstream.flake = false;

    # local-nure.url = "git+ssh://gitea@linerds.us/pencelheimer/typst_nure_template";
    local-nure.url = "git+ssh://gitea@linerds.us/unexplrd/typst_nure_template?ref=multi-pages";
    local-nure.flake = false;

    # Example of downloading icons from a non-flake source
    # font-awesome = {
    #   url = "github:FortAwesome/Font-Awesome";
    #   flake = false;
    # };
  };

  outputs = inputs @ {
    nixpkgs,
    typix,
    flake-utils,
    ...
  }:
    flake-utils.lib.eachDefaultSystem (system: let
      pkgs = nixpkgs.legacyPackages.${system};
      inherit (pkgs) lib;
      inherit (lib.strings) escapeShellArg;

      typixLib = typix.lib.${system};

      src = lib.fileset.toSource {
        root = ./.;
        fileset = lib.fileset.unions [
          # lib/ gets imported, which is unwanted
          # (lib.fileset.fromSource (typixLib.cleanTypstSource ./.))
          # ./main.typ
          # (lib.fileset.maybeMissing ./doc.toml)
          # (lib.fileset.maybeMissing ./utils.typ)
          # (lib.fileset.maybeMissing ./chapters)
          # (lib.fileset.maybeMissing ./assets)
          # (lib.fileset.maybeMissing ./figures)
          ./src
        ];
      };
      commonArgs = {
        typstSource = "src/main.typ";

        fontPaths = [
          "${pkgs.liberation_ttf}/share/fonts/truetype"
        ];

        # Make sure to override outdated files/links (in case of updated flake.lock)
        # (may be undesirable with config/universities.yaml in case of custom subjects)
        forceVirtualPaths = true;

        virtualPaths = [
          # Add paths that must be locally accessible to typst here
          # {
          #   dest = "src/lib";
          #   src = "${inputs.local-nure}/src";
          # }
          # {
          #   dest = "config/universities.yaml";
          #   src = "${inputs.local-nure}/src/config/universities.yaml";
          # }
        ];
      };

      mkTypstPackagesDrv = name: entries: let
        linkFarmEntries =
          lib.foldl (set: {
            name,
            version,
            namespace,
            input,
          }:
            set
            // {
              "${namespace}/${name}/${version}" = input;
            })
          {}
          entries;
      in
        pkgs.linkFarm name linkFarmEntries;

      unpublishedTypstPackages = mkTypstPackagesDrv "unpublished-packages" [
        # {
        #   namespace = "unexplrd";
        #   name = "test-multifile";
        #   version = "0.1.0";
        #   input = inputs.local-nure;
        # }
        {
          namespace = "local";
          name = "nure";
          version = "0.1.0";
          input = inputs.local-nure;
        }
      ];

      # Any transitive dependencies must be added here
      # See https://loqusion.github.io/typix/recipes/using-typst-packages.html#the-typstpackages-attribute
      # unstable_typstPackages = [
      #   {
      #     name = "oxifmt";
      #     version = "0.2.1";
      #     hash = "sha256-8PNPa9TGFybMZ1uuJwb5ET0WGIInmIgg8h24BmdfxlU=";
      #   }
      # ];

      # Compile a Typst project, *without* copying the result
      # to the current directory
      build-drv = typixLib.buildTypstProject (commonArgs
        // {
          inherit src;
          # inherit unstable_typstPackages;
          TYPST_PACKAGE_PATH = unpublishedTypstPackages;
        });

      # Compile a Typst project, and then copy the result
      # to the current directory
      build-script = typixLib.buildTypstProjectLocal (commonArgs
        // {
          inherit src;
          # inherit unstable_typstPackages;
          TYPST_PACKAGE_PATH = unpublishedTypstPackages;
        });

      # Watch a project and recompile on changes
      watch-script = typixLib.watchTypstProject (lib.recursiveUpdate commonArgs
        {
          typstWatchCommand = "TYPST_PACKAGE_PATH=${escapeShellArg unpublishedTypstPackages} typst watch";
        });
    in {
      checks = {inherit build-drv build-script watch-script;};

      packages.default = build-drv;
      packages.watch = watch-script;

      apps = rec {
        default = watch;
        build = flake-utils.lib.mkApp {
          drv = build-script;
        };
        watch = flake-utils.lib.mkApp {
          drv = watch-script;
        };
      };

      devShells.default = typixLib.devShell {
        inherit (commonArgs) fontPaths virtualPaths;

        env = {
          TYPST_PACKAGE_PATH = escapeShellArg unpublishedTypstPackages;
        };
        packages = with pkgs; [
          # WARNING: Don't run `typst-build` directly, instead use `nix run .#build`
          # See https://github.com/loqusion/typix/issues/2
          # build-script
          watch-script

          just
          typstyle
          yq
        ];
      };
    });
}