startenv

#!/bin/bash

PYTHON_VERSION=3.6.1
ROOT_DIR=`pwd`
LOCAL_PYTHON=${ROOT_DIR}/.localpython
VIRTUALENV_DIR='python_env'

PYTHON_BIN=python
if [[ ${PYTHON_VERSION:0:1} == '3' ]]; then
    PYTHON_BIN=python3
fi


# Install a package if it's not present
# Usage: install_package binary [package]
# Checks if "which binary" is successful, if not, installs the package
# If package isn't given, defaults to the same name as binary
function install_package {
    BINARY=$1
    PACKAGE=${2:-$BINARY}
    if [ -z "$(which $BINARY 2>/dev/null)" ]
    then
        case "$PACKAGE" in
            pip)
                curl -fsSL https://bootstrap.pypa.io/get-pip.py > get-pip.py
                sudo python get-pip.py
                rm get-pip.py
                ;;
            brew)
                ruby -e "$(curl -fsSL https://raw.githubusercontent.com/Homebrew/install/master/install)"
                export PATH=$PATH:/usr/local/bin
                ;;
            *)
                if [ "$(uname -s)" = "Darwin" ]
                then
                    brew install $PACKAGE
                else
                    found=$(dpkg -l $PACKAGE | grep -qv "no packages found matching" || echo 1)

                    if [ ! $found = "" ]; then
                        echo "Installing $PACKAGE"
                        sudo apt-get -y -qq install $PACKAGE
                    fi
                fi
                ;;
        esac
    fi
}


function install_python(){
    if [ ! -f ${LOCAL_PYTHON}/bin/${PYTHON_BIN} ]; then
        if [ ! -d ${ROOT_DIR}/.src ]; then
            mkdir ${ROOT_DIR}/.src
        fi
        cd ${ROOT_DIR}/.src

        PYTHON_TAR=Python-${PYTHON_VERSION}.tgz
        if [ ! -f $PYTHON_TAR ]; then
            wget http://www.python.org/ftp/python/${PYTHON_VERSION}/$PYTHON_TAR
        fi

        if [ ! -d Python-${PYTHON_VERSION} ]; then
            tar -zxvf $PYTHON_TAR
        fi
        cd Python-${PYTHON_VERSION}

        if [ ! -d $LOCAL_PYTHON ]; then
            mkdir $LOCAL_PYTHON
        fi

        # Install SQLite
        PACKAGES=( libsqlite3-dev libreadline6 libreadline6-dev libbz2-dev libdbm-ocaml-dev libgdbm-dev libcurses-ocaml-dev )
        for package in ${PACKAGES[@]}
        do
            install_package $package
        done

        ./configure --prefix=$LOCAL_PYTHON
        make
        make install

        cd $ROOT_DIR
    fi
}


#==============================================================================

if [ -z $VIRTUAL_ENV ]; then
    if [ ! -f "${ROOT_DIR}/python_env/bin/activate" ]; then
        install_python

        echo "Creating virtual environment."
        ${LOCAL_PYTHON}/bin/${PYTHON_BIN} -m venv $VIRTUALENV_DIR
    fi

    . ./python_env/bin/activate

    pip install --upgrade virtualenv pip

    ./refreshenv

    export PATH=$PATH:`npm bin`
else
    echo "Already in a virtualenv. Not doing anything!"
fi