Bash prompt with rvm, nvm, virtualenv and git integration.

.bash_prompt

function __git_dirty {
  git diff --quiet HEAD &>/dev/null 
  [ $? == 1 ] && echo " ↺ "
}
 
function __git_branch {
  __git_ps1 "%s"
}
 
function __my_rvm_ruby_version {
  local gemset=$(echo $GEM_HOME | awk -F'@' '{print $2}')
  [ "$gemset" != "" ] && gemset="@$gemset"
  local version=$(echo $MY_RUBY_HOME | awk -F'-' '{print $2}')
  local full="$version$gemset"
  [ "$full" != "" ] && echo "rb:$full"
}

function __virtualenv {
  local env=$(basename "$VIRTUAL_ENV")
  [ "$env" != "" ] && echo "py:$env"
}

function __node {
  if hash node 2>/dev/null; then
    local v=$(node -v)
  fi
  [ "$v" != "" ] && echo "n:${v:1}"
}
 
function __info {
  local full=(
    $(__my_rvm_ruby_version)
    $(__virtualenv)
    $(__node)
    $(__git_branch)
    $(__git_dirty)
  )
  full="${full[*]}"
  [ "$full" != "" ] && echo "[$full]" 
}

PS1="┌─\$(__info)──(\w)\n└─>"