A bash prompt with useful information, including popping up a growl notification when commands are done.

.bashrc

function parse_git_dirty {
  [[ $(git status 2> /dev/null | tail -n1) != "nothing to commit (working directory clean)" ]] && echo '✏ '
}

function parse_git_branch {
  git branch --no-color 2> /dev/null | grep \* | awk '{print $2}'
}

function parse_hg_branch {
  hg branch 2>/dev/null
}

function latest_command {
  history | tail -n 1 | sed 's/[0-9 ]*\(.*\)/\1/'
}

function growl_latest_command {
  priority="Normal"
  if (( $1 != 0 )); then
    priority="Emergency"
  fi
  latest_command | growlnotify -p $priority -n "Command Prompt $priority" `pwd` 1>/dev/null 2>&1
}

function prompt_command_function
{
  last_result=$?
  growl_latest_command $last_result

  last_result="\[\e[33m\]$last_result\[\e[0m\]"
  titlebar_last_command="\[\e]2;$(latest_command)\a\]"
  rvm_prompt="\[\e[33m\]$(rvm-prompt s i v p g)\[\e[0m\]"

  git_branch=$(parse_git_branch)
  hg_branch=$(parse_hg_branch)
  git_dirty= #$(parse_git_dirty)
  hg_dirty= 

  git_dirty=${git_dirty:+" \[\e[31m\]$git_dirty\[\e[0m\]"}
  git_branch=${git_branch:+" (\[\e[35m\]${git_branch}\[\e[0m\]${git_dirty})"}
  hg_branch=${hg_branch:+" (\[\e[36m\]${hg_branch}\[\e[0m\]${hg_dirty})"}

  PS1="$titlebar_last_command$last_result \h:\[\e[32m\]\w\[\e[0m\] $rvm_prompt \u$git_branch$hg_branch\$ "
}

export PROMPT_COMMAND=prompt_command_function