Show RVM Gemset, Git branch, & Git dirty in bash promt

Sometimes you get confused and make a mistake from terminal. It happens. Often it happens from not knowing your context while working. This helps keep that from happening.

Open your ~/.bash_profile file and add the following.

Show current RVM gemset (if any)

function rvm_version {
  local gemset=$(echo $GEM_HOME | awk -F'@' '{print $2}')
  [ "$gemset" != "" ] && gemset="@$gemset"
  local version=$(echo $MY_RUBY_HOME | awk -F'-' '{print $2}')
  [ "$version" != "" ] && version="$version"
  local full="$version$gemset"
  [ "$full" != "" ] && echo " $full"
}

Show Git branch (if any)

function parse_git_branch {
  ref=$(git symbolic-ref HEAD 2> /dev/null) || return
  echo " "${ref#refs/heads/}" "
}

Show Git dirty (uncommitted changes)

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

Putting it all together

export PS1="\w$(rvm_version)$(parse_git_branch)$(parse_git_dirty)$ "

Ive added some colors to mine which you can do if you like but it looks like this...