build

#!/bin/bash
#
# Build RPMs with docker

set -euo pipefail

export LC_ALL=C

DOCKER_PKG_DIR="/pkg"
DOCKER_RPMBUILD_DIR="${DOCKER_PKG_DIR}/rpmbuild"

SCRIPT_DIR=$(dirname $(readlink -f $0))
HOST_RPMBUILD_DIR="${SCRIPT_DIR}/rpmbuild"

PACKAGER="$(basename "${0}")"

DEBUG="no"

# Usage
usage() {
    cat << _EOF_
Usage:
    ${PACKAGER} [-d] BUILD_IMAGE_NAME:BUILD_IMAGE_TAG [BUILD_RPM_OPTIONS]

    Options:
        -d Debug mode

        BUILD_RPM_OPTIONS
            build-rpm options (default: -a -bi -o yes)

    Environment variables:
        BUILD_HOSTNAME: container host name

    Build for AlmaLinux 9:
        ${PACKAGER} almalinux:9

    Build for AlmaLinux 8:
        ${PACKAGER} almalinux:8

    Build for CentOS 7:
        ${PACKAGER} centos:7
_EOF_
}

build() {
    local BUILD_IMAGE="${1}"
    shift
    local BUILD_RPM_OPTIONS="${@:--a -bi -o yes}"

    local BUILD_IMAGE_NAME=$(echo ${BUILD_IMAGE} | cut -d':' -f 1)
    local BUILD_IMAGE_TAG=$(echo ${BUILD_IMAGE} | cut -d':' -f 2)
    local MODULE_VERSION=$(echo ${BUILD_IMAGE} | cut -d':' -f 3)

    local BUILD_IMAGE="${BUILD_IMAGE_NAME}:${BUILD_IMAGE_TAG}"
    local BUILD_HOSTNAME="${BUILD_HOSTNAME:-${HOSTNAME}}"

    local DOCKER_OPTIONS=""
    local BUILD_CMD="${DOCKER_PKG_DIR}/setup && ${DOCKER_PKG_DIR}/build-rpm ${BUILD_RPM_OPTIONS}"
    if [[ "${DEBUG}" = "yes" ]]; then
        echo "# Manual Build: ${BUILD_CMD}"
        DOCKER_OPTIONS="-it"
        BUILD_CMD="/bin/bash"
    fi

    # Update build image
    docker pull ${BUILD_IMAGE}

    # Build
    docker run \
        --name ${BUILD_HOSTNAME} \
        -h "${BUILD_HOSTNAME}" \
        -v "${SCRIPT_DIR}":$(dirname ${DOCKER_RPMBUILD_DIR}) \
        --rm=true \
        ${DOCKER_OPTIONS} \
        ${BUILD_IMAGE} \
        /bin/bash -c "${BUILD_CMD}"
}

# Main
main() {
    [[ $# -lt 1 ]] && usage && exit 1

    while getopts dh OPT; do
        case "${OPT}" in
            "d" )
                DEBUG="yes" ;;
            "h" )
                usage
                exit 0
                ;;
            * )
                usage
                exit 1
                ;;
        esac
    done
    shift $((OPTIND - 1))

    build "${@}"
}

[[ ${#BASH_SOURCE[@]} = 1 ]] && main "${@}"