#!/usr/bin/env bash

FROMFEDORA='34'

ABSDIR="$( dirname "$(readlink -f -- "$0")" )"
cd ${ABSDIR}

type -P docker >/dev/null && DOCKER=$(which docker)
type -P podman >/dev/null && DOCKER=$(which podman)

if ! type -P jq >/dev/null ; then
    echo "Error : please install jq"
    exit 1
fi

TMPFILE=/tmp/fedoraproject_msmtp_$$

curl -s https://src.fedoraproject.org/_dg/bodhi_updates/rpms/msmtp -o ${TMPFILE}
if ! jq -e .releases.F${FROMFEDORA} ${TMPFILE} >&/dev/null; then
    echo "ERROR : No msmtp release available for Fedora ${FROMFEDORA}"
    echo "Please check https://src.fedoraproject.org/rpms/msmtp to choose the right release."
    exit 2
fi

if MSMTP=$(jq -re .updates.F${FROMFEDORA}.stable ${TMPFILE}); then
    echo "Found ${MSMTP} for Fedora ${FROMFEDORA}"
else
    echo "ERROR : No stable msmtp release available for Fedora ${FROMFEDORA}."
    echo "Please check https://src.fedoraproject.org/rpms/msmtp to choose the right release."
    exit 3
fi
rm ${TMPFILE}

MSMTP_VERSION=$(echo "${MSMTP}" | sed -e "s/msmtp-\(.*\)\.fc${FROMFEDORA}$/\1/")

ARCH=$(${DOCKER} run --rm docker.io/library/rockylinux:8 uname -i)

${DOCKER} build -t docker-msmtp-build -f- . <<EOF
FROM docker.io/library/rockylinux:8
RUN dnf install -y epel-release dnf-plugins-core && \
dnf config-manager --set-enabled powertools && \
dnf install -y rpm-build gcc make gettext gnutls-devel libgsasl-devel libidn-devel libsecret-devel && \
useradd -m dontbuildasroot -s /bin/bash
USER dontbuildasroot
RUN curl https://download-ib01.fedoraproject.org/pub/fedora/linux/updates/${FROMFEDORA}/Everything/SRPMS/Packages/m/msmtp-${MSMTP_VERSION}.fc${FROMFEDORA}.src.rpm -o /tmp/msmtp.src.rpm && \
rpmbuild --rebuild /tmp/msmtp.src.rpm
EOF

${DOCKER} create -ti --name docker-msmtp-xfer docker-msmtp-build bash
${DOCKER} cp docker-msmtp-xfer:/home/dontbuildasroot/rpmbuild/RPMS/${ARCH}/msmtp-${MSMTP_VERSION}.el8.${ARCH}.rpm ./files/
${DOCKER} rm -fv docker-msmtp-xfer
${DOCKER} rmi -f docker-msmtp-build