build: Add image.yaml option to inject OpenShift CVO annotations

We had these in the legacy oscontainer for RHCOS, and OKD today
hacks them in via a Dockerfile:
https://github.com/openshift/okd-machine-os/blob/0e9fbabbd3363bfc46d9d657bc173666e83e5d18/Dockerfile#L34

We need to carry support for this forward into the new format image,
as it's what is used to display the OS version as part of the release
image.

src/cmd-build

@@ -407,6 +407,7 @@ else
     ostree_tarfile_path="${name}-${buildid}-ostree.${basearch}.ociarchive"
     gitsrc=$(jq -r .git.origin < "${PWD}/coreos-assembler-config-git.json")
     cmd=(ostree container encapsulate --copymeta="rpmostree.inputhash")
+    openshift_cvo_labels=$(jq -r '.["ostree-container-inject-openshift-cvo-labels"]' < "${image_json}")
 
     # The ostree-ext default is 64, but this is still too much apparently
     # for (older?) versions of podman AKA containers/storage (or maybe)
@@ -419,11 +420,18 @@ else
         ;;
         *) fatal "Unknown ostree-format: ${ostree_format}"
     esac
+    labels=()
+    if test "${openshift_cvo_labels}" = "true"; then
+        labels+=("--label=io.openshift.build.version-display-names=machine-os=$(extract_osrelease_name "$buildid")" \
+                 "--label=io.openshift.build.versions=machine-os=${buildid}"
+                )
+    fi
     runv "${cmd[@]}" --repo="${tmprepo}" \
         --label="coreos-assembler.image-config-checksum=${image_config_checksum}" \
         --label="coreos-assembler.image-input-checksum=${image_input_checksum}" \
         --label="org.opencontainers.image.source=${gitsrc}" \
         --label="org.opencontainers.image.revision=${config_gitrev}" \
+        "${labels[@]}" \
         "${buildid}" \
         oci-archive:"${ostree_tarfile_path}".tmp:latest
     /usr/lib/coreos-assembler/finalize-artifact "${ostree_tarfile_path}"{.tmp,}

src/cmdlib.sh

@@ -1038,3 +1038,13 @@ buildmeta = builds.get_build_meta('${buildid}')
 cmdlib.import_ostree_commit(workdir, builddir, buildmeta)
 ")
 }
+
+# Extract the value of NAME from os-release
+extract_osrelease_name() {
+    local buildid=$1; shift
+    local out="$workdir/tmp/osrelease"
+    rm "${out}" -rf
+    ostree checkout --repo "${tmprepo}" --user-mode --subpath=/usr/lib/os-release "${buildid}" "$out"
+    # shellcheck disable=SC1091,SC2153
+    (. "$out/os-release" && echo "${NAME}")
+}

src/image-default.yaml

@@ -10,6 +10,8 @@ extra-kargs: []
 
 # Can also be oci-chunked
 ostree-format: oci-chunked-v1
+# Inject io.openshift.build.version-display-names for OpenShift CVO
+ostree-container-inject-openshift-cvo-labels: false
 # True if we should use `ostree container image deploy`
 deploy-via-container: false