Show time since last commit and branch name in prompt

.profile

NORMAL="\033[0m"
BLUE="\033[1;34m"
cyan="\033[0;36m"
yellow="\033[0;33m"
RED="\033[1;31m"

source ~/bin/git-completion.bash # or where your git-completion.bash is installed

function minutes_since_last_commit {
  now=`date +%s`
  last_commit=`git log --pretty=format:'%at' -1 2> /dev/null`
  if [ $last_commit ]; then
    seconds_since_last_commit=$((now-last_commit))
    minutes_since_last_commit=$((seconds_since_last_commit/60))
    echo $minutes_since_last_commit
  else
    echo "∞"
  fi
}

function __find_warning_color {  
  local g="$(__gitdir)"
  if [ -n "$g" ]; then
    local MINUTES_SINCE_LAST_COMMIT=`minutes_since_last_commit`
    if [ "$MINUTES_SINCE_LAST_COMMIT" == "∞" ]; then
      __warning_color=${cyan}
    elif [ "$MINUTES_SINCE_LAST_COMMIT" -gt 30 ]; then
      __warning_color=${RED}
    elif [ "$MINUTES_SINCE_LAST_COMMIT" -gt 10 ]; then
      __warning_color=${yellow}
    else
      __warning_color=${cyan}
    fi
  fi
}

PROMPT_COMMAND=__find_warning_color
export PS1="\[${BLUE}\]\W\["'$(echo -e "${__warning_color}")'"\]"' $(__git_ps1 "($(minutes_since_last_commit)m|%s) ")'"\[${NORMAL}\]\$ "

Genialt! Takker :)