#!/bin/sh
set -e

virtualenv="virtualenv"
declare -a packages
packages=(which) 
if [ -f /etc/debian_version ]; then
    packages+=(python-pip python-virtualenv python-dev libevent-dev libffi-dev libxml2-dev libxslt-dev zlib1g-dev)
    for package in ${packages[@]}; do
        if [ "$(dpkg --status -- $package 2>/dev/null|sed -n 's/^Status: //p')" != "install ok installed" ]; then
            # add a space after old values
            missing="${missing:+$missing }$package"
        fi
    done
    if [ -n "$missing" ]; then
        echo "$0: missing required DEB packages. Installing via sudo." 1>&2
        sudo apt-get -y install $missing
    fi
else 
    packages+=(libevent-devel libffi-devel libxml2-devel libxslt-devel zlib-devel)
    if [ -f /etc/fedora-release ]; then
        packages+=(python2-pip python2-virtualenv python2-devel)
    elif [ -f /etc/redhat-release ]; then
        unset ${GREP_OPTIONS}
        eval $(cat /etc/os-release | grep VERSION_ID)
        if [ ${VERSION_ID:0:1} -lt 8 ]; then
            packages+=(python-virtualenv python-devel)
        else
            packages+=(python2-virtualenv python2-devel)
            virtualenv="virtualenv-2"
        fi
    fi

    for package in ${packages[@]}; do
        if [ "$(rpm -qa $package 2>/dev/null)" == "" ]; then
            missing="${missing:+$missing }$package"
        fi
    done

    if [ -n "$missing" ]; then
        echo "$0: missing required RPM packages. Installing via sudo." 1>&2
        sudo yum -y install $missing
    fi
fi

${virtualenv} --python=$(which python2) --no-site-packages --distribute virtualenv

# avoid pip bugs
./virtualenv/bin/pip install --upgrade pip

# slightly old version of setuptools; newer fails w/ requests 0.14.0
./virtualenv/bin/pip install setuptools==32.3.1

./virtualenv/bin/pip install -r requirements.txt

# forbid setuptools from using the network because it'll try to use
# easy_install, and we really wanted pip; next line will fail if pip
# requirements.txt does not match setup.py requirements -- sucky but
# good enough for now
./virtualenv/bin/python setup.py develop