Add script to rebuild msmtp from fedora

docker_rpmbuild-rebuild_msmtp.sh

@@ -0,0 +1,52 @@
+#!/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