os/programs/bash.nix

{config, lib, pkgs, inputs, os, ...} : {
    programs.bash.enable = true;
    programs.bash.bashrcExtra = lib.concatStrings [
      ''
      if [ -n "$PS1" ]; then
          NEW_PROMPT_COMMAND='
              MY_PWD="$PWD"
              [[ "$MY_PWD" =~ ^"$HOME"(/|$) ]] && MY_PWD="~''${MY_PWD#$HOME}"
              TRIMMED_PWD=''${MY_PWD: -40};
              TRIMMED_PWD=''${TRIMMED_PWD:-$MY_PWD}
              [[ "''${#MY_PWD}" -ge 41 ]] && TRIMMED_PWD="…$TRIMMED_PWD"

              SHELL_PREFIX=""
              [[ -n "$IN_NIX_SHELL" ]] && SHELL_PREFIX="$SHELL_PREFIX "
              [[ -n "$AWS_VAULT" ]] && SHELL_PREFIX="$SHELL_PREFIX 🔓︎"
              [[ -n "$FLUTTER_ENV" ]] && SHELL_PREFIX="$SHELL_PREFIX ✌︎"
              [[ -n "$REACTNATIVE_ENV" ]] && SHELL_PREFIX="$SHELL_PREFIX ⚛"
          '
          if [ -n "''${PROMPT_COMMAND// /}" ]; then
              PROMPT_COMMAND="$PROMPT_COMMAND
  $NEW_PROMPT_COMMAND"
          else
              PROMPT_COMMAND="$NEW_PROMPT_COMMAND"
          fi
          unset NEW_PROMPT_COMMAND

          export PS1="[\t \[\e[32m\]\u\[\e[m\]\[\e[32m\]@\[\e[m\]\[\e[32m\]\h\[\e[m\]]"'$SHELL_PREFIX'" \[\e[36m\]"'$TRIMMED_PWD'"\[\e[m\] \$ "
      fi
      ''

      # On mac we have to import brew
      (if (os == "darwin") then ''
        eval "$(/opt/homebrew/bin/brew shellenv)"
      '' else ''
        
      '')
    ];

    programs.bash.shellAliases = {
      chmod = "chmod --preserve-root";
      chown = "chown --preserve-root";
      ls = "ls --color=auto";
      df = "df -h -x squashfs -x tmpfs -x devtmpfs -x overlay -x revokefs-fuse";
      free = "free -h";
      toupper = "tr [:lower:] [:upper:]";
      tolower = "tr [:upper:] [:lower:]";
      rebuild = if (os == "linux") then '' 
        cd $HOME/.local/os &&
        nix flake update --commit-lock-file
        nixos-rebuild switch --flake "path:$HOME/.local/os#" --use-remote-sudo &&
        cd -
      '' else ''
        cd $HOME/.local/os &&
        nix flake update --commit-lock-file
        home-manager switch &&
        cd -
      '';
      ":r" = "!!";
      ":wq" = "exit";
      vim = "hx";
    };
    programs.bash.sessionVariables = {
      NIX_SHELL_PRESERVE_PROMPT = 1;
      NIXPKGS_ALLOW_UNFREE = 1;
      HISTCONTROL = "ignoreboth:erasedups";
    };
}