ci: Add a f29 FCOS build

Let's start doing testing using coreos-assembler + Fedora CoreOS.

Closes: #1774
Approved by: jlebon

.papr.yml

@@ -15,6 +15,24 @@ tests:
 
 ---
 
+# Build a Fedora CoreOS ostree
+context: fcos29-cosa-build
+inherit: true
+
+# This test case wants unprivileged recursive containers
+# which we don't have right now; so just provision a VM and do a
+# docker --privileged run.
+# https://github.com/openshift/origin/issues/21514
+host:
+  distro: fedora/29/atomic
+
+tests:
+  - ./ci/f29-cosa-build.sh
+
+timeout: 60m
+
+---
+
 context: f28-primary
 inherit: true
 

ci/f29-cosa-build.sh

@@ -0,0 +1,29 @@
+#!/usr/bin/bash
+# Build rpm-ostree, then inject it into a cosa container and build FCOS
+set -xeuo pipefail
+
+podman run --privileged --rm \
+       -v $(pwd):/srv/code -w /srv/code \
+       registry.fedoraproject.org/fedora:29 \
+       /bin/sh -c './ci/build.sh && make install DESTDIR=$(pwd)/installroot'
+
+cosaimg=quay.io/coreos-assembler/coreos-assembler:latest
+podman pull "${cosaimg}"
+
+codedir=$(pwd)
+mkdir fcos
+cd fcos
+cat >script.sh <<'EOF'
+#!/usr/bin/bash
+set -xeuo pipefail
+# Overlay the built binaries
+rsync -rlv /code/installroot/usr/ /usr/
+coreos-assembler init --force https://github.com/coreos/fedora-coreos-config
+coreos-assembler build ostree
+EOF
+chmod a+x script.sh
+podman run --privileged --rm -ti \
+       -v ${codedir}:/code -v $(pwd):/srv -w /srv \
+       --entrypoint bash \
+       --privileged ${cosaimg} \
+       ./script.sh