oh-my-fish/themes/robbyrussell/fish_prompt.fish

function fish_prompt
  set -l cyan (set_color -o cyan)
  set -l yellow (set_color -o yellow)
  set -l red (set_color -o red)
  set -l blue (set_color -o blue)
  set -l normal (set_color normal)

  set -l arrow "$red➜ "
  set -l cwd $cyan(basename (prompt_pwd))

  if [ (git_branch_name) ]
    set -l git_branch $red(git_branch_name)
    set git_info "$blue git:($git_branch$blue)"

    if [ (is_git_dirty) ]
      set -l dirty "$yellow ✗"
      set git_info "$git_info$dirty"
    end
  end

  echo -n -s $arrow $cwd $git_info $normal '>'
end