#!/bin/bash

# Run this script from the root of the systemd's git repository
# or set REPO_ROOT to a correct path.
#
# Example execution on Fedora:
# dnf install docker
# systemctl start docker
# export CONT_NAME="my-fancy-container"
# ci/travis-centos.sh SETUP RUN CLEANUP

PHASES=(${@:-SETUP RUN CLEANUP})
CENTOS_RELEASE="${CENTOS_RELEASE:-latest}"
CONT_NAME="${CONT_NAME:-centos-$CENTOS_RELEASE-$RANDOM}"
DOCKER_EXEC="${DOCKER_EXEC:-docker exec -it $CONT_NAME}"
DOCKER_RUN="${DOCKER_RUN:-docker run}"
REPO_ROOT="${REPO_ROOT:-$PWD}"
ADDITIONAL_DEPS=(systemd-ci-environment libidn2-devel python-lxml python36 ninja-build libasan net-tools strace nc busybox e2fsprogs quota dnsmasq)
# Repo with additional depencencies to compile newer systemd on CentOS 7
COPR_REPO="https://copr.fedorainfracloud.org/coprs/mrc0mmand/systemd-centos-ci/repo/epel-7/mrc0mmand-systemd-centos-ci-epel-7.repo"
COPR_REPO_PATH="/etc/yum.repos.d/${COPR_REPO##*/}"

function info() {
    echo -e "\033[33;1m$1\033[0m"
}

set -e

source "$(dirname $0)/travis_wait.bash"

for phase in "${PHASES[@]}"; do
    case $phase in
        SETUP)
            info "Setup phase"
            info "Using Travis $CENTOS_RELEASE"
            # Pull a Docker image and start a new container
            docker pull centos:$CENTOS_RELEASE
            info "Starting container $CONT_NAME"
            $DOCKER_RUN -v $REPO_ROOT:/build:rw \
                        -w /build --privileged=true --name $CONT_NAME \
                        -dit --net=host centos:$CENTOS_RELEASE /sbin/init
            # Beautiful workaround for Fedora's version of Docker
            sleep 1
            $DOCKER_EXEC yum makecache
            $DOCKER_EXEC curl "$COPR_REPO" -o "$COPR_REPO_PATH"
            $DOCKER_EXEC yum -q -y install epel-release yum-utils
            $DOCKER_EXEC yum-config-manager -q --enable epel
            $DOCKER_EXEC yum -y upgrade
            # Install necessary build/test requirements
            $DOCKER_EXEC yum -y install "${ADDITIONAL_DEPS[@]}"
            $DOCKER_EXEC python3.6 -m ensurepip
            $DOCKER_EXEC python3.6 -m pip install meson
            # Create necessary symlinks
            $DOCKER_EXEC ln --force -s /usr/bin/python3.6 /usr/bin/python3
            $DOCKER_EXEC ln --force -s /usr/bin/ninja-build /usr/bin/ninja
            ;;
        RUN)
            info "Run phase"
            # Build systemd
            CONFIGURE_OPTS=(
                # RHEL8 options
                -Dsysvinit-path=/etc/rc.d/init.d
                -Drc-local=/etc/rc.d/rc.local
                -Ddns-servers=''
                -Ddev-kvm-mode=0666
                -Dkmod=true
                -Dxkbcommon=true
                -Dblkid=true
                -Dseccomp=true
                -Dima=true
                -Dselinux=true
                -Dapparmor=false
                -Dpolkit=true
                -Dxz=true
                -Dzlib=true
                -Dbzip2=true
                -Dlz4=true
                -Dpam=true
                -Dacl=true
                -Dsmack=true
                -Dgcrypt=true
                -Daudit=true
                -Delfutils=true
                -Dlibcryptsetup=true
                -Delfutils=true
                -Dqrencode=false
                -Dgnutls=true
                -Dmicrohttpd=true
                -Dlibidn2=true
                -Dlibiptc=true
                -Dlibcurl=true
                -Defi=true
                -Dtpm=true
                -Dhwdb=true
                -Dsysusers=true
                -Ddefault-kill-user-processes=false
                -Dtests=unsafe
                -Dinstall-tests=true
                -Dtty-gid=5
                -Dusers-gid=100
                -Dnobody-user=nobody
                -Dnobody-group=nobody
                -Dsplit-usr=false
                -Dsplit-bin=true
                -Db_lto=false
                -Dnetworkd=false
                -Dtimesyncd=false
                -Ddefault-hierarchy=legacy
                # Custom options
                -Dslow-tests=true
                -Dtests=unsafe
                -Dinstall-tests=true
            )
            docker exec -it -e CFLAGS='-g -O0 -ftrapv' $CONT_NAME meson build "${CONFIGURE_OPTS[@]}"
            $DOCKER_EXEC ninja -v -C build
            # Let's install the new systemd and "reboot" the container to avoid
            # unexpected fails due to incompatibilities with older systemd
            $DOCKER_EXEC ninja -C build install
            docker restart $CONT_NAME
            # "Mask" the udev-test.pl, as it requires newer version of systemd-detect-virt
            # and it's pointless to run it on a VM in a Docker container...
            echo -ne "#!/usr/bin/perl\nexit(0);\n" > "test/udev-test.pl"
            $DOCKER_EXEC ninja -C build test
            ;;
        CLEANUP)
            info "Cleanup phase"
            docker stop $CONT_NAME
            docker rm -f $CONT_NAME
            ;;
        *)
            echo >&2 "Unknown phase '$phase'"
            exit 1
    esac
done