gistfile1.sh

# ~/.bashrc

# tab-completion for git subcommands
# (this is for git installed via MacPorts: `sudo port install git-core +svn`)
source /opt/local/share/doc/git-core/contrib/completion/git-completion.bash

# git status with a dirty flag
function __git_status_flag {
  git_status="$(git status 2> /dev/null)"
  remote_pattern="^# Your branch is (.*) of"
  diverge_pattern="# Your branch and (.*) have diverged"
  if [[ ! ${git_status}} =~ "working directory clean" ]]; then
    state="⚡"
    spacer=" "
  fi

  if [[ ${git_status} =~ ${remote_pattern} ]]; then
    spacer=" "
    if [[ ${BASH_REMATCH[1]} == "ahead" ]]; then
      remote="↑"
    else
      remote="↓"
    fi
  fi

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

  echo "${state}${remote}${spacer}"
}

# the prompt itself
PS1='\[\e[32m\]\u@\[\e[1m\]\h\[\e[22m\]:\[\e[1;34m\]\w\[\e[22;35m\]$(__git_ps1 " [\[\e[33m\]$(__git_status_flag)\[\e[35m\]%s]")\[\e[33m\] \$ \[\e[0m\]'