Merge pull request #12 from numberly/build/versionning

build(Makefile): use a proper script to retrieve the version

Makefile

@@ -1,5 +1,7 @@
 .DEFAULT_GOAL := build
 
+VERSION ?= $(shell ./hack/get-version.sh)
+
 .PHONY:fmt vet build
 fmt:
 	go fmt ./...
@@ -11,7 +13,7 @@ build: vet
 	go build
 
 build-docker: vet
-	docker build -t numberly/vault-db-injector:2.0.1 .
+	docker build -t numberly/vault-db-injector:${VERSION} .
 
 push-docker: build-docker
-	docker push numberly/vault-db-injector:2.0.1
+	docker push numberly/vault-db-injector:${VERSION}

hack/get-version.sh

@@ -0,0 +1,26 @@
+#!/usr/bin/env bash
+# Copyright 2022 The Kubernetes Authors.
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+#     http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+
+if [[ "${GIT_TAG}" == "" ]]; then
+  GIT_TAG="$(git describe --tags --dirty --always)"
+fi
+
+# The value passed by gcr's cloudbuild will have this prefix by default
+# https://github.com/kubernetes/k8s.io/blob/aa5a1f164aece8f116196c40ac7b937be479cd41/images/codesearch/cs-fetch-repos/Makefile#L19
+if [[ "${GIT_TAG}" =~ ^v[0-9]{8}- ]]; then
+  GIT_TAG="${GIT_TAG:10}"
+fi
+
+echo "${GIT_TAG}"