bash_prompt

# Awesomness in form of colors, git branch, and commit (dirty) status
#
# * Copy this file to ~/.bash_prompt
# * Add to .bashrc:
#    if [ -f ~/.bash_prompt ]; then
#      source ~/.bash_prompt
#    fi
#

        RED="\[\033[0;31m\]"
     YELLOW="\[\033[0;33m\]"
      GREEN="\[\033[0;32m\]"
       BLUE="\[\033[0;34m\]"
  LIGHT_RED="\[\033[1;31m\]"
LIGHT_GREEN="\[\033[1;32m\]"
      WHITE="\[\033[1;37m\]"
 LIGHT_GRAY="\[\033[0;37m\]"
 COLOR_NONE="\[\e[0m\]"

function parse_git_branch {
  local state=''
  local remote=''
  local branch=''
  local origin_awk='{gsub(/https:\/\/.+@/, "https://<auth>@"); print $3}'

  git rev-parse --git-dir &> /dev/null
  if [[ $? -ne 0 ]]; then
    return 1
  fi
  local git_status="$(git status 2> /dev/null)"
  local origin="$(git remote show -n origin | grep 'Fetch URL:' | awk "${origin_awk}")"
  local branch_pattern="^(# )?On branch ([^${IFS}]*)"
  local remote_pattern='(# )?Your branch is (.*) of'
  local diverge_pattern='(# )?Your branch and (.*) have diverged'

  if [[ ! ${git_status} =~ "working tree clean" ]]; then
    state="${RED}⚡"
  fi

  # add an else if or two here if you want to get more specific
  if [[ ${git_status} =~ ${remote_pattern} ]]; then
    if [[ ${BASH_REMATCH[2]} == "ahead" ]]; then
      remote="${YELLOW}↑"
    else
      remote="${YELLOW}↓"
    fi
  fi

  if [[ ${git_status} =~ ${diverge_pattern} ]]; then
    remote="${YELLOW}↕"
  fi

  if [[ ${git_status} =~ ${branch_pattern} ]]; then
    branch=${BASH_REMATCH[2]}
  fi
  echo "${COLOR_NONE}${origin} ${GREEN}(${branch})${remote}${state}"
}

function prompt_func() {
  previous_return_value=$?;
  local prompt="${TITLEBAR}"

  local git_state="$(parse_git_branch)"
  if [[ -n "${git_state}" ]]; then
    prompt="${prompt}${BLUE}[${git_state}${BLUE}]${COLOR_NONE}\n"
  fi

  prompt="${prompt}${BLUE}[${HOSTNAME}${COLOR_NONE}:${YELLOW}\w${BLUE}]${COLOR_NONE} "

  if [ $previous_return_value -eq 0 ] ; then
    # PS1="${prompt}➔ "
    PS1="${prompt}\\$ "
  else
    PS1="${prompt}${RED}\\$ ${COLOR_NONE}"
  fi
}

PROMPT_COMMAND=prompt_func