gistfile1.sh

# ansi control sequences
BLACK="\[\033[0m\]"
BOLD_BLACK="\[\033[1;30m\]"
RED="\[\033[0;31m\]"
BOLD_RED="\[\033[1;31m\]"
GREEN="\[\033[0;32m\]"
BOLD_GREEN="\[\033[1;32m\]"
YELLOW="\[\033[0;33m\]"
BOLD_YELLOW="\[\033[1;33m\]"
BLUE="\[\033[0;34m\]"
BOLD_BLUE="\[\033[1;34m\]"
MAUVE="\[\033[0;35m\]"
BOLD_MAUVE="\[\033[1;35m\]"
CYAN="\[\033[0;36m\]"
BOLD_CYAN="\[\033[1;36m\]"
WHITE="\[\033[0;37m\]"
DEFAULT="\[\033[0;39m\]"

USER=$(whoami)
HOSTNAME=$(hostname)
PWD=$(pwd)
TIME=$(date "+%a, %b %d, %H:%M:%S")
TTY=$(tty|cut -d/ -f3)
LAST_PROMPT_DISPLAY_TIME=$(date +%s)

format_time()
{
  FTIME="$1"
  HOURS=$(echo "${FTIME} 3600 / p" | dc)
  FTIME=$(echo "${FTIME} 3600 % p" | dc)
  MINS=$(echo "${FTIME} 60 / p" | dc)
  FTIME=$(echo "${FTIME} 60 % p" | dc)
  SECS="${FTIME}"
  FORMATTED=$(printf "%0.2d:%0.2d" "${MINS}" "${SECS}")
  if [ $HOURS != "0" ]; then
    FORMATTED="${HOURS}:${FORMATTED}"
  fi
  echo $FORMATTED
}

function git_dirty_state {
  [[ $(git status 2> /dev/null | tail -n1) != "nothing to commit (working directory clean)" ]] && echo "*"
}

function git_wip_state {
  [[ $(git log -n 1 --pretty=oneline | grep wip) ]] && echo "!"
}

PROMPT_COMMAND='
  echo -ne "\033]0;${USER}@${HOSTNAME}:${PWD}\007";

  CURRENT_PROMPT_DISPLAY_TIME=$(date +%s)
  PROMPT_DISPLAY_TIME=$(format_time $(($CURRENT_PROMPT_DISPLAY_TIME - $LAST_PROMPT_DISPLAY_TIME)))
  LAST_PROMPT_DISPLAY_TIME=$(date +%s)

  GIT_BRANCH=$(git branch &>/dev/null; if [ $? -eq 0 ]; then echo "$(git branch | grep '^*' |sed s/\*\ //)"; fi)
  if [ ! $GIT_BRANCH == "" ]; then
    GIT_BRANCH_TITLE=":$GIT_BRANCH$(git_dirty_state)"
    if [ "$(git_dirty_state)" == "*" ]; then
      GIT_BRANCH_COLOR="${RED}";
    elif [ "$(git_wip_state)" == "!" ]; then
      GIT_BRANCH_COLOR="${YELLOW}";
    else
      GIT_BRANCH_COLOR="${GREEN}";
    fi
    GIT_BRANCH_DISPLAY="$BOLD_BLACK[${CYAN}$GIT_BRANCH_COLOR$GIT_BRANCH$BOLD_BLACK]"
  else
    GIT_BRANCH_DISPLAY=""
    GIT_BRANCH_TITLE=""
  fi

  TITLE_HOSTNAME=$(hostname -s)
  TITLE_DIR=$(basename $(pwd))
  TITLE_BRANCH=$GIT_BRANCH_TITLE

  echo -ne "\033]0;$TITLE_HOSTNAME:$TITLE_DIR$TITLE_BRANCH\007";

  export PS1="$BOLD_BLACK[$CYAN\u@$CYAN$HOSTNAME$BOLD_BLACK] [$CYAN$PROMPT_DISPLAY_TIME$BOLD_BLACK] $GIT_BRANCH_DISPLAY
[$BOLD_YELLOW\w$BOLD_BLACK]$DEFAULT "
'