Current RVM Ruby & Gemset and Git branch in your Bash prompt

rvm_git_prompt.sh

function current_rvm_ruby {
  color=$(tput setaf 3)
  default=$(tput sgr0)

  version=$(echo $MY_RUBY_HOME | awk -F'-' '{print $2}')
  gemset=$(echo $GEM_HOME | awk -F'@' '{print $2}')
  [ "$gemset" != "" ] && gemset="@$gemset"
  full=${color}${version}${gemset}${default}
  [ "$full" != "" ] && echo "$full "
}
function current_git_branch {
  red=$(tput setaf 1)
  green=$(tput setaf 2)
  default=$(tput sgr0)

  if git rev-parse --git-dir >/dev/null 2>&1
  then
    branch=$(git branch 2>/dev/null| sed -e '/^[^*]/d' -e 's/* \(.*\)/(\1)/')
    if git diff --quiet 2>/dev/null >&2
    then
      branch=${green}$branch${default}
    else
      branch=${red}$branch${default}
    fi
  else
    return 0
  fi
  echo "$branch "
}
export PS1="\$(current_rvm_ruby)\u:\W \$(current_git_branch)$ "