Initialise Python VirtualEnv and show it's name in $PS1

virtualenv-init.sh

#!/bin/bash

# virtualenv init.sh - Initialise Python VirtualEnv and show it in $PS1
# By Michael Ludvig <mludvig@logix.net.nz>

# Usage
#  1) copy this file as 'init.sh' to your 'virtualenv' project's folder
#  2) run it, e.g. ~/whatever/init.sh (where 'whatever' is the project)

if [ -z "${_MY_DIR}" ]; then
        export _MY_DIR=$(dirname $0)
        test -z "${_MY_DIR}" && _MY_DIR=$(dirname $(which $0))

        exec bash --rcfile ${_MY_DIR}/init.sh
else
        source ${_MY_DIR}/bin/activate
        _VIRTENV=$(basename ${VIRTUAL_ENV})
        echo -e "\e[33;1mVirtualenv ${_VIRTENV} activated. Use ^D to exit...\e[0m"
        export PS1="\u@\h \[\e[37;1m\]\w\[\e[0m\] \[\e[34m\]{${_VIRTENV}}\[\e[0m\]\$(__git_ps1 ' \[\e[35m\](%s)\[\e[0m\]') \$ "
fi