[main] Onboard net-kourier to automatic Dockerfile generation

Makefile

@@ -0,0 +1,3 @@
+generate-release:
+	./openshift/generate.sh
+.PHONY: generate-release

openshift/generate.sh

@@ -0,0 +1,14 @@
+#!/usr/bin/env bash
+
+set -euo pipefail
+
+repo_root_dir=$(dirname "$(realpath "${BASH_SOURCE[0]}")")/..
+
+go install github.com/openshift-knative/hack/cmd/generate@latest
+
+$(go env GOPATH)/bin/generate \
+  --root-dir "${repo_root_dir}" \
+  --generators dockerfile \
+  --includes cmd \
+  --app-file-fmt "/ko-app/%s" \
+  --dockerfile-image-builder-fmt "registry.ci.openshift.org/openshift/release:rhel-8-release-golang-%s-openshift-4.17"

openshift/project.yaml

@@ -0,0 +1,3 @@
+project:
+  tag: knative-nightly
+  imagePrefix: net-kourier

openshift/release/create-release-branch.sh

@@ -24,8 +24,13 @@ git checkout upstream/"${upstream_release}"
 
 # Copy the openshift extra files from the OPENSHIFT/main branch.
 git fetch openshift main
-git checkout openshift/main -- openshift OWNERS
-git add openshift OWNERS
+git checkout openshift/main -- openshift OWNERS Makefile
+
+tag=${release/release-/}
+yq write --inplace openshift/project.yaml project.tag "knative-$tag"
+make generate-release
+
+git add openshift OWNERS Makefile
 git commit -m "Add openshift specific files."
 
 openshift/release/download_release_artifacts.sh "${release}"