venv-helper

#!/usr/bin/env bash

function v(){
    case $(echo $1 | tr 'A-Z' 'a-z') in
        create)
            local psw=''

            if [[ "${3:0:3}" = '-p=' ]]; then
                local pyv="${3:3}"
                local isgood=0

                if ! [[ $pyv =~ / ]]; then
                    if ! [[ -d $HOME/.virtualenv/py/$pyv ]]; then
                        (
                            cd $HOME/.virtualenv/cpython

                            hg up 0 &> /dev/null
                            rm -r * &> /dev/null
                            yes c | hg checkout $pyv &> /dev/null

                            if [ $? -eq 0 ]; then
                                ./configure --prefix $HOME/.virtualenv/py/$pyv &> /dev/null
                                make &> /dev/null
                                make install &> /dev/null

                                hg up 0 &> /dev/null
                                rm -r * &> /dev/null
                            else
                                exit 1
                            fi
                        )

                        if [ $? -eq 0 ]; then
                            isgood=1
                            pyv=$HOME/.virtualenv/py/$pyv
                        fi
                    else
                        isgood=1
                        pyv=$HOME/.virtualenv/py/$pyv
                    fi
                else
                    isgood=1
                fi

                if let isgood; then
                    if [[ -e $pyv/bin/python ]]; then
                        psw="-p $pyv/bin/python"
                    else
                        psw="-p $pyv/bin/python3"
                    fi
                else
                    echo "Invalid Python version."

                    return 1
                fi
            fi

            if ! [[ -d "$HOME/.virtualenv/envs/$2" ]]; then
                virtualenv $psw "$HOME/.virtualenv/envs/$2"
            else
                echo "$2 already exists."
            fi
            ;&

        use)
            source "$HOME/.virtualenv/envs/$2/bin/activate"
            ;;

        #list)
            #find

        *)
            echo 'Usage:'
            echo '    v list'
            echo '    v use <env>'
            echo '    v create <env> [-p=<python>]'
            ;;
    esac
}