oh-my-zsh/lib/theme-and-appearance.zsh

# ls colors
autoload -U colors && colors

# Enable ls colors
export LSCOLORS="Gxfxcxdxbxegedabagacad"

if [[ "$DISABLE_LS_COLORS" != "true" ]]; then
  # Find the option for using colors in ls, depending on the version
  if [[ "$OSTYPE" == netbsd* ]] || [[ "$OSTYPE" == darwin* ]]; then
    # On NetBSD, test if "gls" (GNU ls) is installed (this one supports colors);
    # otherwise, leave ls as is, because NetBSD's ls doesn't support -G
    gls --color -d . &>/dev/null && alias ls='gls --color=tty'
  elif [[ "$OSTYPE" == openbsd* ]]; then
    # On OpenBSD, "gls" (ls from GNU coreutils) and "colorls" (ls from base,
    # with color and multibyte support) are available from ports.  "colorls"
    # will be installed on purpose and can't be pulled in by installing
    # coreutils, so prefer it to "gls".
    gls --color -d . &>/dev/null && alias ls='gls --color=tty'
    colorls -G -d . &>/dev/null && alias ls='colorls -G'
  else
    # For GNU ls, we use the default ls color theme. They can later be overwritten by themes.
    if [[ -z "$LS_COLORS" ]]; then
      (( $+commands[dircolors] )) && eval "$(dircolors -b)"
    fi

    ls --color -d . &>/dev/null && alias ls='ls --color=tty' || alias ls='ls -G'

    # Take advantage of $LS_COLORS for completion as well.
    zstyle ':completion:*' list-colors "${(s.:.)LS_COLORS}"
  fi
fi

setopt auto_cd
setopt multios
setopt prompt_subst

[[ -n "$WINDOW" ]] && SCREEN_NO="%B$WINDOW%b " || SCREEN_NO=""

# Apply theming defaults
PS1="%n@%m:%~%# "

# git theming default: Variables for theming the git info prompt
ZSH_THEME_GIT_PROMPT_PREFIX="git:("         # Prefix at the very beginning of the prompt, before the branch name
ZSH_THEME_GIT_PROMPT_SUFFIX=")"             # At the very end of the prompt
ZSH_THEME_GIT_PROMPT_DIRTY="*"              # Text to display if the branch is dirty
ZSH_THEME_GIT_PROMPT_CLEAN=""               # Text to display if the branch is clean