{ pkgs, lib, ... }:
let
  eza = "${lib.getExe pkgs.eza} --color=always --group-directories-first";
  cargo = "${lib.getExe pkgs.cargo}";
  coreutils = "${pkgs.coreutils}/bin";
in
{
  programs.fish = {
    enable = true;

    interactiveShellInit = ''
      #disable greeting
      set fish_greeting

      #fixes gnupg password entry
      export GPG_TTY=(${coreutils}/tty)

      #pfetch on shell start (disable pkgs because of execution time)
      PF_INFO="ascii title os host kernel uptime memory editor wm" ${lib.getExe pkgs.pfetch-rs}
    '';

    shellAliases = {
      c = cargo;
      cr = "${cargo} run";
      cb = "${cargo} build";

      # from DistroTube's dot files: Changing "ls" to "eza"
      ls = "${eza} -al";
      la = "${eza} -a";
      ll = "${eza} -l";
      lt = "${eza} -aT";

      # gets the largest files in a git repo's history
      "git-size" = ''
        ${lib.getExe pkgs.git} rev-list --objects --all |
                ${lib.getExe pkgs.git} cat-file --batch-check='%(objecttype) %(objectname) %(objectsize) %(rest)' |
                ${lib.getExe pkgs.gnused} -n 's/^blob //p' |
                ${coreutils}/sort --numeric-sort --key=2 |
                ${coreutils}/cut -c 1-12,41- |
                ${coreutils}/numfmt --field=2 --to=iec-i --suffix=B --padding=7 --round=nearest'';

      # aliases for (I think) macos commands
      pbcopy = "${pkgs.wl-clipboard}/bin/wl-copy";
      pbpaste = "${pkgs.wl-clipboard}/bin/wl-paste";

      gcc-native = "${lib.getExe pkgs.gcc} -Q --help=target -mtune=native -march=native | ${lib.getExe pkgs.gnugrep} -E '^\\s+\-(mtune|march)=' | ${coreutils}/tr -d '[:blank:]'";
    };

    shellInit = ''
      fish_add_path ~/.local/bin
      fish_add_path ~/.cargo/bin
      fish_add_path ~/.config/emacs/bin
      set hydro_color_pwd 62A
      set hydro_color_error red
      set hydro_color_duration yellow
      set hydro_color_prompt green
      set hydro_color_git blue
    '';

    plugins = [
      {
        name = "hydro";
        src = pkgs.fishPlugins.hydro.src;
      }
    ];
  };
}