#!/bin/bash

# Dependencies:
#
# - functions

# stack.sh
# ---------
# - check_crio
# - install_crio
# - configure_crio
# - stop_crio

# Save trace setting
_XTRACE_DOCKER=$(set +o | grep xtrace)
set +o xtrace


# Defaults
# --------

CRIO_ENGINE_SOCKET_FILE=${CRIO_ENGINE_SOCKET_FILE:-/var/run/crio/crio.sock}

# Functions
# ---------

function check_crio {
    if is_ubuntu; then
       dpkg -l | grep crio-o > /dev/null 2>&1
    else
       false
       # TODO: CentOS/Fedora support.
    fi
}

function install_crio {
    if [[ -z "$os_PACKAGE" ]]; then
        GetOSVersion
    fi

    local lsb_dist=${os_VENDOR,,}
    local dist_version=${os_CODENAME}
    local arch=$(dpkg --print-architecture)
    if is_ubuntu; then
        apt_get install apt-transport-https ca-certificates software-properties-common
        sudo add-apt-repository -y ppa:projectatomic/ppa
        # Installing podman and containerd will get us compatible versions of
        # cri-o and runc. And we need podman to manage container images anyway.
        apt_get install podman buildah
    elif is_fedora; then
        false
        # TODO(dulek): CentOS/Fedora support
    fi
}

function configure_crio {
    # After an ./unstack it will be stopped. So it is ok if it returns exit-code == 1
    sudo systemctl stop crio.service || true

    local crio_conf
    crio_conf=/etc/crio/crio.conf

    # We're wrapping values in "\<val>\" because that's the format cri-o wants.
    iniset -sudo ${crio_conf} crio.api listen \"${CRIO_ENGINE_SOCKET_FILE}\"
    if [[ "$ENABLE_DEBUG_LOG_LEVEL" == "True" ]]; then
        # debug is way too verbose, info will be enough
        iniset -sudo ${crio_conf} crio.runtime log_level \"info\"
    fi
    if is_ubuntu; then
        # In Ubuntu's a special vendored version of runc is installed with
        # cri-o. This means that it'll not work with the system's version of
        # runc. Moreover vendored runc is not placed into /usr/bin, where
        # crio.conf states that it will be. We fix that by linking the vendored
        # binary to /usr/bin.
        if [[ ! -e /usr/bin/runc ]]; then
            sudo ln -s /usr/lib/cri-o-runc/sbin/runc /usr/bin/runc
            sudo chmod +x /usr/bin/runc
        fi

        # At least for 18.04 we need to set up /etc/containers/registries.conf
        # with some initial content. That's another bug with that PPA.
        local registries_conf
        registries_conf="/etc/containers/registries.conf"
        if [[ ! -f ${registries_conf} ]]; then
            sudo mkdir -p `dirname ${registries_conf}`
            cat << EOF | sudo tee ${registries_conf}
[registries.search]
registries = ['docker.io']
EOF
        fi
    fi

    sudo systemctl --no-block restart crio.service
}

function stop_crio {
    sudo systemctl stop crio.service || true
}

# Restore xtrace
$_XTRACE_DOCKER