A colored indicator of the git tree status

gistfile1.sh

git_ps1() {
  GIT_PS1="$(__git_ps1)"
  if [ "$GIT_PS1" ]; then
    GIT_STATUS=$(git status --porcelain)
    # if there are modified files
    if echo "$GIT_PS1" | grep 'CONFLICT' > /dev/null; then
      GIT_COLOR=31
    elif echo "$GIT_STATUS" | grep '^.M' > /dev/null ; then
      GIT_COLOR=35
    # if there are unknown files
    elif echo "$GIT_STATUS" | grep '^??' > /dev/null ; then
      GIT_COLOR=33
    # if there are staged changes
    elif echo "$GIT_STATUS" | grep '^[^ ]' > /dev/null ; then
      GIT_COLOR=36
    else
      GIT_COLOR=32
    fi
    echo -ne '\033[01;'$GIT_COLOR'm'"$GIT_PS1"
  fi
}