git_prompt method to include git branch and significant symbols in bash prompt

.git_profile

git_prompt () {
  if ! git rev-parse --git-dir > /dev/null 2>&1; then
    return 0
  fi

  git_branch=$(git branch 2>/dev/null| sed -n '/^\*/s/^\* //p')
	status=''

	# Ensure the index is up to date.
	git update-index --really-refresh -q &>/dev/null;

  # Check for unstaged changes.
  if ! $(git diff-files --quiet --ignore-submodules --); then
    status+='+';
  fi
	# Check for uncommitted changes in the index.
	if ! $(git diff --quiet --ignore-submodules --cached); then
		status+='*';
	fi
  # Check for untracked files.
  if [ -n "$(git ls-files --others --exclude-standard)" ]; then
    status+='?';
  fi
  # Check for unpushed commits.
  if [ -n "$(git unpushed)" ]; then
    status+='↑';
  fi

	if [ -n "$status" ]; then
		status=" $status";
	fi

  echo " [git:$git_branch$status]"
}

PS1='\h:\W$(git_prompt)\$ '