gistfile1.sh

# Echoes the name of the current screen, if any
function getScreenName {
  if [ ${STY:-""} == "" ]; then
    screen_name=""
  else
    screen_name="(`echo "${STY}" | sed 's/^[^\.]*\.//'`)"
  fi
  echo $screen_name
}

# Echoes the string to use as the colored prompt
function getColoredPrompt {
  # set variable identifying the chroot you work in (used in the prompt below)
  if [ -z "$debian_chroot" ] && [ -r /etc/debian_chroot ]; then
    debian_chroot=$(cat /etc/debian_chroot)
  fi

  echo '${debian_chroot:+($debian_chroot)}\[\033[01;32m\]\u@\h\[\033[01;36m\]$(getScreenName)\[\033[00m\]:\[\033[01;35m\]\w\[\033[00m\]\$ '
}

# Echoes the string to use as the uncolored prompt
function getUncoloredPrompt {
  # set variable identifying the chroot you work in (used in the prompt below)
  if [ -z "$debian_chroot" ] && [ -r /etc/debian_chroot ]; then
    debian_chroot=$(cat /etc/debian_chroot)
  fi

  echo '${debian_chroot:+($debian_chroot)}\u@\h$(getScreenName):\w\$ '
}

# Sets the prompt to either the colored or uncolored, depending on the current
# environment
function setPrompt() {
  # set variable identifying the chroot you work in (used in the prompt below)
  if [ -z "$debian_chroot" ] && [ -r /etc/debian_chroot ]; then
    debian_chroot=$(cat /etc/debian_chroot)
  fi

  # set a fancy prompt (non-color, unless we know we "want" color)
  case "$TERM" in
    xterm*) color_prompt=yes;;
  esac

  force_color_prompt=yes

  if [ -n "$force_color_prompt" ]; then
    if [ -x /usr/bin/tput ] && tput setaf 1 >&/dev/null; then
      # We have color support; assume it's compliant with Ecma-48
      # (ISO/IEC-6429). (Lack of such support is extremely rare, and such
      # a case would tend to support setf rather than setaf.)
      color_prompt=yes
    else
      color_prompt=
    fi
  fi

  if [ "$color_prompt" = yes ]; then
    PS1="$(getColoredPrompt)"
  else
    PS1="$(getUncoloredPrompt)"
  fi
  unset color_prompt force_color_prompt
}

# Sets the title of the current xterm to mirror the prompt
function setTitleToPrompt {
  # Reset the prompt in case the title was already added to it.
  setPrompt

  # We need to use the uncolored prompt for the title as the color escape
  # sequences confuse it.
  case "$TERM" in
  xterm*|rxvt*)
    PS1="\[\e]0;$(getUncoloredPrompt)\a\]$PS1"
    ;;
  *)
    ;;
  esac
}

function setTitle {
  # if setTitleToPrompt was called then we need to clear the title-setting bits
  # from the prompt, otherwise this won't take affect.
  setPrompt
  echo -en "\033]0;$1\007"
}

# Default to having the current prompt be the xterm name
setTitleToPrompt