Singularity(alternative a docker build host) recipe for a CentOS-7 based veyon builder

Singularity

Bootstrap: docker
From: centos:7

%post
mkdir -p /selinux /misc /net
mkdir -p /pasteur
mkdir -p /local-storage /mnt/beegfs /baycells/home /baycells/scratch /c6/shared /c6/eb /local/gensoft2 /c6/shared/rpm /Bis/Scratch2 /mnt/beegfs
mkdir -p /c7/shared /c7/scratch /c7/home

yum -y update
# install the dependencies
# github.com/veyon/veyon/.ci/linux.centos.77/Dockerfile
yum -y install epel-release centos-release-scl
yum -y install \
	cmake3 \
	controls2-devel \
	cyrus-sasl-devel \
	devtoolset-7 \
	fakeroot \
	git \
	libjpeg-turbo-devel \
	libpng-devel \
	libXcomposite-devel \
	libXcursor-devel \
	libXdamage-devel \
	libXfixes-devel \
	libXinerama-devel \
	libXrandr-devel \
	libXrandr-devel \
	libXtst-devel \
	lzo-devel \
	make \
	openldap-devel \
	openssl-devel \
	pam-devel \
	procps-devel \
	qca-qt5-devel \
	qca-qt5-ossl \
	qt5-linguist \
	qt5-qtbase \
	qt5-qtbase-devel \
	qt5-qtquick \
	qt5-qttools \
	rpm-build \
	zlib-devel \
\
	redhat-rpm-config \
	rpm-build \
	wget \
\
	qt5-qtquickcontrols2-devel

yum clean all
%runscript
echo "CentOS-7 builder for veyon"
echo "ex of usage:\nsingularity shell -H /path/to/temporary/home c7-veyon-builder.sif"
echo "mkdir -p ~/rpmbuild/{BUILD,BUILDROOT,RPMS,SOURCES,SPECS,SRPMS}"
echo "(cd ~/rpmbuild/SOURCES && wget https://github.com/veyon/veyon/releases/download/v4.4.0/veyon-4.4.0-src.tar.bz2)"
echo "(cd ~/rpmbuild/SPECS && wget https://gist.githubusercontent.com/truatpasteurdotfr/d2b6033b7256389584895a4fbea38165/raw/081a69119403754882ed1481c2e6013f0d1cbae9/veyon.spec-4.4.0 -O veyon.spec)"
echo "rpmbuild -ba ~/rpmbuild/SPECS/veyon.spec"

Of course, one can install the packages on their current CentOS-7 machine (bare metal or docker), and just run the wget/rpmbuil stages