fancy-prompt.sh

function _fancy_prompt {
  local RED="\[\033[01;31m\]"
  local GREEN="\[\033[01;32m\]"
  local YELLOW="\[\033[01;33m\]"
  local BLUE="\[\033[01;34m\]"
  local WHITE="\[\033[00m\]"

  local PROMPT=""

  # Working directory
  PROMPT=$PROMPT"$GREEN\w"

  # Git-specific
  local GIT_STATUS=$(git status 2> /dev/null)
  if [ -n "$GIT_STATUS" ]  # Are we in a git directory?
  then
    # Open paren
    PROMPT=$PROMPT" $RED("

    # Branch
    PROMPT=$PROMPT$(git branch --no-color 2> /dev/null | sed -e "/^[^*]/d" -e "s/* \(.*\)/\1/")

    # Warnings
    PROMPT=$PROMPT$YELLOW

    # Merging
    if [[ $GIT_STATUS =~ 'Unmerged paths' ]]
    then
      PROMPT=$PROMPT"|MERGING"
    # Dirty flag
    elif [[ $GIT_STATUS =~ 'nothing to commit (working directory clean)' ]]
    then
      PROMPT=$PROMPT
    else
      PROMPT=$PROMPT"*"
    fi

    # Warning for no email setting
    if [[ $(git config user.email) =~ ^$ ]]
    then
      PROMPT=$PROMPT" !!! NO EMAIL SET !!!"
    fi

    # Closing paren
    PROMPT=$PROMPT"$RED)"
  fi

  # Final $ symbol
  PROMPT=$PROMPT"$BLUE\$$WHITE "

  export PS1=$PROMPT
}

export PROMPT_COMMAND="_fancy_prompt"