packaging: Add push_to_registry()

This function will push a specific tag to a registry, whenever the
PUSH_TO_REGISTRY environment variable is set, otherwise it's a no-op.

This will be used in the future to avoid replicating that logic in every
builder used by the kata-deploy scripts.

Signed-off-by: Fabiano Fidêncio <fabiano.fidencio@intel.com>

tools/packaging/kata-deploy/local-build/kata-deploy-binaries-in-docker.sh

@@ -47,8 +47,10 @@ docker build -q -t build-kata-deploy \
 docker run \
 	-v $HOME/.docker:/root/.docker \
 	-v /var/run/docker.sock:/var/run/docker.sock \
+	-v "${kata_dir}:${kata_dir}" \
 	--env CI="${CI:-}" \
-	--env USER=${USER} -v "${kata_dir}:${kata_dir}" \
+	--env USER=${USER} \
+	--env PUSH_TO_REGISTRY="${PUSH_TO_REGISTRY:-"no"}" \
 	--rm \
 	-w ${script_dir} \
 	build-kata-deploy "${kata_deploy_create}" $@

tools/packaging/scripts/lib.sh

@@ -9,6 +9,7 @@ export GOPATH=${GOPATH:-${HOME}/go}
 export tests_repo="${tests_repo:-github.com/kata-containers/tests}"
 export tests_repo_dir="$GOPATH/src/$tests_repo"
 export BUILDER_REGISTRY="quay.io/kata-containers/builders"
+export PUSH_TO_REGISTRY="${PUSH_TO_REGISTRY:-"no"}"
 
 this_script_dir="$(cd "$(dirname "${BASH_SOURCE[0]}")" && pwd)"
 
@@ -113,3 +114,18 @@ get_last_modification() {
 
 	echo "$(git log -1 --pretty=format:"%H" ${file})${dirty}"
 }
+
+# $1 - The tag to be pushed to the registry
+# $2 - "yes" to use sudo, "no" otherwise
+push_to_registry() {
+	local tag="${1}"
+	local use_sudo="${2:-"yes"}"
+
+	if [ "${PUSH_TO_REGISTRY}" == "yes" ]; then
+		if [ "${use_sudo}" == "yes" ]; then
+			sudo docker push ${tag}
+		else
+			docker push ${tag}
+		fi
+	fi
+}