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# This module defines the packages that appear in
# /run/current-system/sw.

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

with lib;

let

  requiredPackages = map (pkg: setPrio ((pkg.meta.priority or 5) + 3) pkg)
    [ pkgs.acl
      pkgs.attr
      pkgs.bashInteractive # bash with ncurses support
      pkgs.bzip2
      pkgs.coreutils-full
      pkgs.cpio
      pkgs.curl
      pkgs.diffutils
      pkgs.findutils
      pkgs.gawk
      pkgs.stdenv.cc.libc
      pkgs.getent
      pkgs.getconf
      pkgs.gnugrep
      pkgs.gnupatch
      pkgs.gnused
      pkgs.gnutar
      pkgs.gzip
      pkgs.xz
      pkgs.less
      pkgs.libcap
      pkgs.nano
      pkgs.ncurses
      pkgs.netcat
      config.programs.ssh.package
      pkgs.procps
      pkgs.su
      pkgs.time
      pkgs.utillinux
      pkgs.which
      pkgs.zstd
    ];

in

{
  options = {

    environment = {

      systemPackages = mkOption {
        type = types.listOf types.package;
        default = [];
        example = literalExample "[ pkgs.firefox pkgs.thunderbird ]";
        description = ''
          The set of packages that appear in
          /run/current-system/sw.  These packages are
          automatically available to all users, and are
          automatically updated every time you rebuild the system
          configuration.  (The latter is the main difference with
          installing them in the default profile,
          <filename>/nix/var/nix/profiles/default</filename>.
        '';
      };

      pathsToLink = mkOption {
        type = types.listOf types.str;
        # Note: We need `/lib' to be among `pathsToLink' for NSS modules
        # to work.
        default = [];
        example = ["/"];
        description = "List of directories to be symlinked in <filename>/run/current-system/sw</filename>.";
      };

      extraOutputsToInstall = mkOption {
        type = types.listOf types.str;
        default = [ ];
        example = [ "doc" "info" "devdoc" ];
        description = "List of additional package outputs to be symlinked into <filename>/run/current-system/sw</filename>.";
      };

      extraSetup = mkOption {
        type = types.lines;
        default = "";
        description = "Shell fragments to be run after the system environment has been created. This should only be used for things that need to modify the internals of the environment, e.g. generating MIME caches. The environment being built can be accessed at $out.";
      };

    };

    system = {

      path = mkOption {
        internal = true;
        description = ''
          The packages you want in the boot environment.
        '';
      };

    };

  };

  config = {

    environment.systemPackages = requiredPackages;

    environment.pathsToLink =
      [ "/bin"
        "/etc/xdg"
        "/etc/gtk-2.0"
        "/etc/gtk-3.0"
        "/lib" # FIXME: remove and update debug-info.nix
        "/sbin"
        "/share/emacs"
        "/share/hunspell"
        "/share/nano"
        "/share/org"
        "/share/themes"
        "/share/vim-plugins"
        "/share/vulkan"
        "/share/kservices5"
        "/share/kservicetypes5"
        "/share/kxmlgui5"
      ];

    system.path = pkgs.buildEnv {
      name = "system-path";
      paths = config.environment.systemPackages;
      inherit (config.environment) pathsToLink extraOutputsToInstall;
      ignoreCollisions = true;
      # !!! Hacky, should modularise.
      # outputs TODO: note that the tools will often not be linked by default
      postBuild =
        ''
          # Remove wrapped binaries, they shouldn't be accessible via PATH.
          find $out/bin -maxdepth 1 -name ".*-wrapped" -type l -delete

          if [ -x $out/bin/glib-compile-schemas -a -w $out/share/glib-2.0/schemas ]; then
              $out/bin/glib-compile-schemas $out/share/glib-2.0/schemas
          fi

          ${config.environment.extraSetup}
        '';
    };

  };
}