gistfile1.txt

function find_git_branch {
  local dir=. head
  until [ "$dir" -ef / ]; do
    if [ -f "$dir/.git/HEAD" ]; then
      head=$(< "$dir/.git/HEAD")
      if [[ $head == ref:\ refs/heads/* ]]; then
        git_branch="[${head##*/}] "
      elif [[ $head != '' ]]; then
        git_branch='[detached] '
      else
        git_branch='[unknown] '
      fi
      return
    fi
    dir="../$dir"
  done
  git_branch=''
}

PROMPT_COMMAND="find_git_branch; $PROMPT_COMMAND"

RED="\\[\\033[31m\\]"
GREEN="\\[\\033[32m\\]"
YELLOW="\\[\\033[33m\\]"
BLUE="\\[\\033[34m\\]"
MAGENTA="\\[\\033[35m\\]"
WHITE="\\[\\033[0m\\]"

export PS1="$MAGENTA\$git_branch$GREEN\w$ $WHITE"