Add version flag

Add the version flag to the command flags
and also update Dockerfile to accept the
version build-arg using the

	git describe --tags --always

so we can populate the version with
either the last git tag or the last
git tag with the current SHA.

Also updates the Makefile and the
Github action script

Signed-off-by: Raymond Etornam <retornam@users.noreply.github.com>

.github/actions/push-docker-image/action.yml

@@ -25,6 +25,11 @@ outputs:
 runs:
   using: composite
   steps:
+    - id: git_tag
+      name: Get the Git tag
+      shell: bash
+      run: |
+         echo "VERSION_BUILDARG=$(git describe --tags --always)" >> $GITHUB_ENV
     - name: Login to container registry
       uses: docker/login-action@v3
       with:
@@ -49,6 +54,8 @@ runs:
       with:
         context: .
         platforms: ${{ inputs.platforms }}
+        build-args: |
+          VERSION=${{ env.VERSION_BUILDARG }}
         push: true
         tags: ${{ steps.meta.outputs.tags }}
         labels: ${{ steps.meta.outputs.labels }}

Dockerfile

@@ -1,4 +1,6 @@
-FROM golang:1.22-alpine AS build
+FROM golang:1.23-alpine AS build
+ARG VERSION=dev
+ENV VERSION=${VERSION}
 WORKDIR /app
 COPY go.mod .
 COPY go.sum .
@@ -7,7 +9,7 @@ COPY cmd ./cmd
 COPY pkg ./pkg
 COPY deployments/crds ./deployments/crds
 ENV CGO_ENABLED=0 GOOS=linux
-RUN go build -o hephaestus-controller ./cmd/controller
+RUN go build -ldflags="-X 'main.Version=${VERSION}'" -o hephaestus-controller ./cmd/controller
 
 FROM gcr.io/distroless/static:nonroot
 WORKDIR /

Makefile

@@ -1,13 +1,14 @@
 SHELL:=/bin/bash
+VERSION=$(git describe --tags --always)
 
 ##@ Development
 
 .PHONY: build
 build: ## Build controller binary
-	go build -v -o bin/hephaestus-controller ./cmd/controller/
+	go build -ldflags="-X 'main.Version=${VERSION}'" -o hephaestus-controller ./cmd/controller
 
 docker: ## Build docker image
-	docker build -t ghcr.io/dominodatalab/hephaestus:latest .
+	docker build --build-arg VERSION=${VERSION} -t ghcr.io/dominodatalab/hephaestus:latest .
 
 .PHONY: test
 test: ## Run test suite

pkg/cmd/controller/root.go

@@ -11,6 +11,8 @@ import (
 	"github.com/dominodatalab/hephaestus/pkg/crd"
 )
 
+var Version = "dev"
+
 func NewCommand() *cobra.Command {
 	var cfgFile string
 
@@ -26,11 +28,22 @@ func NewCommand() *cobra.Command {
 		newStartCommand(),
 		newCRDApplyCommand(),
 		newCRDDeleteCommand(),
+		versionCommand(),
 	)
 
 	return cmd
 }
 
+func versionCommand() *cobra.Command {
+	return &cobra.Command{
+		Use:   "version",
+		Short: "prints version",
+		Run: func(cmd *cobra.Command, args []string) {
+			fmt.Println(Version)
+		},
+	}
+}
+
 func newStartCommand() *cobra.Command {
 	return &cobra.Command{
 		Use:   "start",

test/functional/testdata/docker-context/multi-stage/Dockerfile

@@ -1,4 +1,4 @@
-FROM golang:1.19-alpine AS build
+FROM golang:1.23-alpine AS build
 WORKDIR /app
 RUN echo -e 'package main\n\
 import "fmt"\n\