Dockerfile to build s6 RPMs under OEL 7

Dockerfile

FROM oraclelinux:7-slim

ARG skalibs_version=2.9.1.0
ARG s6_version=2.9.0.1
ARG execline_version=2.5.3.0

ARG ruby_version=2.6

RUN true \
	&& yum-config-manager --enablerepo=ol7_optional_latest \
	&& yum install -y git gcc make which

# Install rvm and fpm.  At some point, this won't be necessary, but I'm too
# lazy to hand-build the RPM defs right now.

RUN true \
	&& gpg2 < /dev/null || true \
	&& gpg2 --recv-keys 409B6B1796C275462A1703113804BB82D39DC0E3 7D2BAF1CF37B13E2069D6956105BD0E739499BDB \
	&& curl -sSL https://get.rvm.io | bash -s stable \
	&& /usr/local/rvm/bin/rvm install ruby-${ruby_version} \
	&& /usr/local/rvm/bin/rvm alias create default ${ruby_version} \
	&& /usr/local/rvm/bin/rvm default do gem install --no-doc fpm

# fpm needs rpmbuild

RUN yum install -y rpm-build

# Grab the source for the various components from git.skarnet.org.

RUN true \
	&& mkdir -p /tmp/pkgs \
	&& cd /usr/src \
	&& git clone git://git.skarnet.org/skalibs  -b v${skalibs_version} \
	&& git clone git://git.skarnet.org/execline -b v${execline_version} \
	&& git clone git://git.skarnet.org/s6       -b v${s6_version}

# Use the unix time as our iteration.

RUN date +%s > /.iteration

# Build skalibs.

RUN true \
	&& cd /usr/src/skalibs \
	&& ./configure --dynlibdir=/usr/lib64 \
	&& make install DESTDIR=/tmp/skalibs \
	&& cd /tmp/pkgs \
	&& /usr/local/rvm/bin/rvm default do fpm -s dir -t rpm -n skalibs -v ${skalibs_version} --iteration $(</.iteration) /tmp/skalibs/=/ \
	&& rm -rf /tmp/skalibs

RUN yum install -y /tmp/pkgs/skalibs-*.rpm

# Build execline.

RUN true \
	&& cd /usr/src/execline \
	&& ./configure --dynlibdir=/usr/lib64 --bindir=/usr/libexec/execline \
	&& make install DESTDIR=/tmp/execline \
	&& cd /tmp/pkgs \
	&& /usr/local/rvm/bin/rvm default do fpm -s dir -t rpm -n execline -v ${execline_version} --iteration $(</.iteration) --rpm-tag "Requires: skalibs = ${skalibs_version}" /tmp/execline/=/ \
	&& rm -rf /tmp/execline

RUN yum install -y /tmp/pkgs/execline-*.rpm

# Build s6

RUN true \
	&& cd /usr/src/s6 \
	&& ./configure --dynlibdir=/usr/lib64 --with-lib=/usr/lib/execline \
	&& make install DESTDIR=/tmp/s6 \
	&& cd /tmp/pkgs \
	&& /usr/local/rvm/bin/rvm default do fpm -s dir -t rpm -n s6 -v ${s6_version} --iteration $(</.iteration) --rpm-tag "Requires: skalibs = ${skalibs_version}" --rpm-tag "Requires: execline = ${execline_version}" /tmp/s6/=/ \
	&& rm -rf /tmp/execline

RUN yum install -y /tmp/pkgs/s6-*.rpm

# Packages can be found in /tmp/pkgs.