Runs common rvm commands using chpwd_functions from zsh. Add this to the end of .zshrc file. Runs on 'cd <directory>'

.zshrc-with-rvm

source ~/.zshrc

export PATH="$PATH:$HOME/.rvm/bin" # Add RVM to PATH for scripting

ORIGINAL_PATH=$PATH

function dev_env_setup() {
    # see http://zsh.sourceforge.net/Doc/Release/Shell-Builtin-Commands.html
    emulate -L zsh

    # checks if current directory contains the dot-ruby-version and dot-ruby-gemset files
    # if so, reads the ruby version and gemset from files to run 'rvm use $rb@$gemset' and
    # set necessary ruby environment settings
    export CWED=0
    if [[ (-e ".ruby-version") && (-a ".ruby-gemset") ]];
    then
        local rb=$(cat '.ruby-version')
        local gemset=$(cat '.ruby-gemset')
        source ~/.rvm/scripts/rvm
        rvm use "$rb@$gemset"
    elif [[ (-e "composer.json") ]];
    then
       if [[ -d `pwd`/bin ]];
         then
           export CWED=1
           PATH="$PATH:`pwd`/bin"
       fi
    else
        if [[ -e ".project" ]];
            then
               export CWED=1
               if ! type workon &> /dev/null ;
               then
                   echo "You are entering a python project directory, but virtualenv is not properly installed or configured"
                   echo "Do you want to proceed with the installation? [y]|n"
                   read response
                   if [ $response == 'n' ];
                   then
                      return;
                    else
                        sudo pip install virtualenvwrapper virtualenv
                    fi
                else
                    local project=$(cat '.project')
                    local project_root="$(pwd)"

                    if [[ ! ($project = $(workon | grep $project )) ]];
                        then
                            echo "To properly work on the project, we will need to setup your envvironment."
                            echo "Will now run mkvirtualenv -a $project_root -r $project_root/requirements.txt $project"
                            mkvirtualenv -a $project_root -r $project_root/requirements.txt $project
                            echo "The following packages were installed:"
                            pip list
                    fi
                    echo "Will enter now the $project environment"
                    workon $project
                    echo "Welcome! Now, you can safely work on $project."

                fi
        else
            if ! [[ -z $VIRTUAL_ENV ]];
                then
                    deactivate
                    export CWED=0
            elif ! [[ $ORIGINAL_PATH = $PATH ]];
                then
                    export PATH="$ORIGINAL_PATH"
                    export CWED=0

            else
                return ;
            fi
        fi
    fi;

}


chpwd_functions=(${chpwd_functions[@]} "dev_env_setup")