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#!/bin/bash
# SPDX-license-identifier: Apache-2.0
##############################################################################
# Copyright (c) 2018
# All rights reserved. This program and the accompanying materials
# are made available under the terms of the Apache License, Version 2.0
# which accompanies this distribution, and is available at
# http://www.apache.org/licenses/LICENSE-2.0
##############################################################################

set -o nounset
set -o pipefail

vagrant_version=2.2.14
if ! vagrant version &>/dev/null; then
    enable_vagrant_install=true
else
    if [[ "$vagrant_version" != "$(vagrant version | awk 'NR==1{print $3}')" ]]; then
        enable_vagrant_install=true
    fi
fi

function usage {
    cat <<EOF
usage: $0 -p <PROVIDER>
Installation of vagrant and its dependencies in Linux OS

Argument:
    -p  Vagrant provider
EOF
}

while getopts ":p:" OPTION; do
    case $OPTION in
    p)
        provider=$OPTARG
        ;;
    \?)
        usage
        exit 1
        ;;
    esac
done
if [[ -z "${provider+x}" ]]; then
    usage
    exit 1
fi

case $provider in
    "virtualbox" | "libvirt" )
        export VAGRANT_DEFAULT_PROVIDER=${provider}
        ;;
    * )
        usage
        exit 1
esac
source /etc/os-release || source /usr/lib/os-release

libvirt_group="libvirt"
packages=()
case ${ID,,} in
    *suse)
    INSTALLER_CMD="sudo -H -E zypper -q install -y --no-recommends"
    packages+=(python-devel python-pip)

    # Vagrant installation
    if [[ "${enable_vagrant_install+x}" ]]; then
        vagrant_pgp="pgp_keys.asc"
        wget -q https://keybase.io/hashicorp/$vagrant_pgp
        wget -q https://releases.hashicorp.com/vagrant/$vagrant_version/vagrant_${vagrant_version}_x86_64.rpm
        gpg --quiet --with-fingerprint $vagrant_pgp
        sudo rpm --import $vagrant_pgp
        sudo rpm --checksig vagrant_${vagrant_version}_x86_64.rpm
        sudo rpm --install vagrant_${vagrant_version}_x86_64.rpm
        rm vagrant_${vagrant_version}_x86_64.rpm
        rm $vagrant_pgp
    fi

    case $VAGRANT_DEFAULT_PROVIDER in
        virtualbox)
        wget -q "http://download.virtualbox.org/virtualbox/rpm/opensuse/$VERSION/virtualbox.repo" -P /etc/zypp/repos.d/
        $INSTALLER_CMD --enablerepo=epel dkms
        wget -q https://www.virtualbox.org/download/oracle_vbox.asc -O- | rpm --import -
        packages+=(VirtualBox-5.1)
        ;;
        libvirt)
        # vagrant-libvirt dependencies
        packages+=(qemu libvirt libvirt-devel ruby-devel gcc qemu-kvm zlib-devel libxml2-devel libxslt-devel make)
        # NFS
        packages+=(nfs-kernel-server)
        ;;
    esac
    sudo zypper -n ref
    ;;

    ubuntu|debian)
    INSTALLER_CMD="sudo -H -E apt-get -y -q=3 install"
    packages+=(python3-dev python3-pip)

    # Vagrant installation
    if [[ "${enable_vagrant_install+x}" ]]; then
        wget -q https://releases.hashicorp.com/vagrant/$vagrant_version/vagrant_${vagrant_version}_x86_64.deb
        sudo dpkg -i vagrant_${vagrant_version}_x86_64.deb
        rm vagrant_${vagrant_version}_x86_64.deb
    fi

    case $VAGRANT_DEFAULT_PROVIDER in
        virtualbox)
        echo "deb http://download.virtualbox.org/virtualbox/debian bionic contrib" >> /etc/apt/sources.list
        wget -q https://www.virtualbox.org/download/oracle_vbox_2016.asc -O- | sudo apt-key add -
        wget -q https://www.virtualbox.org/download/oracle_vbox.asc -O- | sudo apt-key add -
        packages+=(virtualbox-5.1 dkms)
        ;;
        libvirt)
        # vagrant-libvirt dependencies
        packages+=(qemu libvirt-bin ebtables dnsmasq libxslt-dev libxml2-dev libvirt-dev zlib1g-dev ruby-dev cpu-checker)
        # NFS
        packages+=(nfs-kernel-server)
        ;;
    esac
    sudo apt-get update
    ;;

    rhel|centos|fedora)
    PKG_MANAGER=$(which dnf || which yum)
    sudo "$PKG_MANAGER" updateinfo
    INSTALLER_CMD="sudo -H -E ${PKG_MANAGER} -q -y install"
    packages+=(python-devel python-pip)

    # Vagrant installation
    if [[ "${enable_vagrant_install+x}" ]]; then
        wget -q https://releases.hashicorp.com/vagrant/$vagrant_version/vagrant_${vagrant_version}_x86_64.rpm
        $INSTALLER_CMD vagrant_${vagrant_version}_x86_64.rpm
        rm vagrant_${vagrant_version}_x86_64.rpm
    fi

    case $VAGRANT_DEFAULT_PROVIDER in
        virtualbox)
        wget -q http://download.virtualbox.org/virtualbox/rpm/rhel/virtualbox.repo -P /etc/yum.repos.d
        $INSTALLER_CMD --enablerepo=epel dkms
        wget -q https://www.virtualbox.org/download/oracle_vbox.asc -O- | rpm --import -
        packages+=(VirtualBox-5.1)
        ;;
        libvirt)
        # vagrant-libvirt dependencies
        packages+=(qemu libvirt libvirt-devel ruby-devel gcc qemu-kvm)
        # NFS
        packages+=(nfs-utils nfs-utils-lib)
        ;;
    esac
    ;;

esac

# Enable Nested-Virtualization
vendor_id=$(lscpu|grep "Vendor ID")
if [[ $vendor_id == *GenuineIntel* ]]; then
    kvm_ok=$(cat /sys/module/kvm_intel/parameters/nested)
    if [[ $kvm_ok == 'N' ]]; then
        echo "Enable Intel Nested-Virtualization"
        sudo rmmod kvm-intel
        echo 'options kvm-intel nested=y' | sudo tee --append /etc/modprobe.d/dist.conf
        sudo modprobe kvm-intel
    fi
else
    kvm_ok=$(cat /sys/module/kvm_amd/parameters/nested)
    if [[ $kvm_ok == '0' ]]; then
        echo "Enable AMD Nested-Virtualization"
        sudo rmmod kvm-amd
        echo 'options kvm-amd nested=1' | sudo tee --append /etc/modprobe.d/dist.conf
        sudo modprobe kvm-amd
    fi
fi
sudo modprobe vhost_net

${INSTALLER_CMD} "${packages[@]}"
case ${ID,,} in
    ubuntu|debian)
    sudo update-alternatives --install /usr/bin/python python /usr/bin/python3 1 --force
    sudo update-alternatives --install /usr/bin/pip pip /usr/bin/pip3 1 --force
    ;;
esac
sudo -H -E pip install --no-cache-dir --upgrade pip
sudo -H -E pip install --no-cache-dir tox
if [[ ${http_proxy+x} ]]; then
    vagrant plugin install vagrant-proxyconf
fi
if [ "$VAGRANT_DEFAULT_PROVIDER" == libvirt ]; then
    vagrant plugin install vagrant-libvirt
    sudo usermod -a -G $libvirt_group "$USER" # This might require to reload user's group assigments
    sudo systemctl restart libvirtd

    # Start statd service to prevent NFS lock errors
    sudo systemctl enable rpc-statd
    sudo systemctl start rpc-statd

    case ${ID,,} in
        ubuntu|debian)
        kvm-ok
        ;;
    esac
fi