System/home-manager/fish.nix

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

{
  options.nathans-home.fish = with lib; {
    enable = mkOption {
      type = types.bool;
      default = true;
    };
  };
  config = lib.mkIf config.nathans-home.fish.enable {
    ## Shell
    # Shell proper
    programs.fish = {
      enable = true;
      # Setup our aliases
      shellAliases = {
        ls = "exa --icons";
        la = "exa --icons -a";
        lg = "exa --icons --git";
        cat = "bat";
        dig = "dog";
        df = "duf";
      };
      # Custom configuration
      interactiveShellInit = ''
        # Setup any-nix-shell
        any-nix-shell fish --info-right | source
        # Load logger function
        source ~/.config/fish/functions/cmdlogger.fish
      '';
      functions = {
        # Setup command logging to ~/.logs
        cmdlogger = {
          onEvent = "fish_preexec";
          body = ''
            mkdir -p ~/.logs
            echo (date -u +"%Y-%m-%dT%H:%M:%SZ")" "(echo %self)" "(pwd)": "$argv >> ~/.logs/(hostname)-(date "+%Y-%m-%d").log
          '';
        };
      };
    };
    # Starship, for the prompt
    programs.starship = {
      enable = true;
      settings = {
        directory = {
          truncation_length = 3;
          fish_style_pwd_dir_length = 1;
        };
        git_commit = {
          commit_hash_length = 6;
          only_detached = false;
        };
        package = {
          symbol = "";
        };
        time = {
          disabled = false;
          format = "[$time]($style)";
          time_format = "%I:%M %p";
        };
      };
    };
  };
}