My vcprompt setup.

gistfile1.sh

# First, install vcprompt.

brew update
brew tap homebrew/headonly
brew install --HEAD vcprompt

gistfile2.sh

# Part of .bashrc

# Set up a custom prompt.

# First, some color definitions.
    BLUE="\[\033[0;34m\]"
   BROWN="\[\033[0;33m\]"
    CYAN="\[\033[0;36m\]"
   GREEN="\[\033[0;32m\]"
     RED="\[\033[0;31m\]"
NO_COLOR="\[\e[0m\]"

# The virtualenv part of the prompt.
function ve_prompt() {
    if [ -n "${VIRTUAL_ENV+x}" ]; then
        echo "(`basename \"$VIRTUAL_ENV\"`) "
    else
        echo ""
    fi
}

# The version control part of the prompt.
function vc_prompt() {
    if test $? -eq 0; then
        local PROMPT_COLOR=$CYAN
    else
        local PROMPT_COLOR=$RED
    fi
    # This doesn't work. :(  Need to figure out why. For now we hardcode colors (below).
    # echo "${RED}\h ${BLUE}\w ${BROWN}$(vcprompt) ${GREEN}$(ve_prompt) ${RED}$($HOME/.rvm/bin/rvm-prompt v p g -d) ${CYAN}\t\n${PROMPT_COLOR}\$${NO_COLOR}"
    echo '\[\033[0;31m\]\h \[\033[0;34m\]\w \[\033[0;33m\]$(vcprompt)\[\033[0;32m\]$(ve_prompt)\[\033[0;31m\]$($HOME/.rvm/bin/rvm-prompt v p g -d) \[\033[0;36m\]\t\n\[\033[0;36m\]\$\[\e[0m\]'
}

PS1="$(vc_prompt) "
PS2="${CYAN}…${NO_COLOR} "

gistfile3.sh

# Resulting prompt is something like this. The version control, virtual env, and ruby (rvm) info are all
# conditional on said thing being activated/in-use. I like my prompt to be on a new line so commands I
# run are easy to scan, and I like the time so I can easily see how long something took to run, or how
# long I was out to lunch.

Host ~/mah/path [vcs:branch] (venv_name) ruby@gemset 10:29:57
$