fix: Adds support for LDflags in Dockerfile for testing #83

* Dockerfile / Makefile
  * Provides support for adding LDflags for IMAGE_VERSION and
    IMAGE_REPOSITORY to go build command
  * Default added for args in case Dockerfile is used to be built without
    specifying args

Dockerfile

@@ -1,13 +1,21 @@
 FROM golang:1.20-alpine3.18 AS builder
 
+ARG HAWTIO_ONLINE_VERSION=latest
+ARG HAWTIO_ONLINE_IMAGE_NAME=docker.io/hawtio/hawtio
+
+ENV IMAGE_VERSION_FLAG="-X main.ImageVersion=${HAWTIO_ONLINE_VERSION}"
+ENV IMAGE_REPOSITORY_FLAG="-X main.ImageRepository=${HAWTIO_ONLINE_IMAGE_NAME}"
+
+ENV GOLDFLAGS="${IMAGE_VERSION_FLAG} ${IMAGE_REPOSITORY_FLAG}"
+
 RUN apk update
 RUN apk add git make
 
 WORKDIR /hawtio-operator
 
 COPY . .
 
-RUN make build
+RUN GOLDFLAGS=${GOLDFLAGS} make build
 
 FROM alpine:3.18
 

Makefile

@@ -1,11 +1,13 @@
 ORG = hawtio
 NAMESPACE ?= hawtio
 PROJECT = operator
-DEFAULT_IMAGE := docker.io/hawtio/operator
+DEFAULT_IMAGE := docker.io/${ORG}/${PROJECT}
 IMAGE ?= $(DEFAULT_IMAGE)
 DEFAULT_TAG := latest
 TAG ?= $(DEFAULT_TAG)
 VERSION ?= 0.5.0
+HAWTIO_ONLINE_VERSION ?= latest
+HAWTIO_ONLINE_IMAGE_NAME ?= docker.io/${ORG}/hawtio
 DEBUG ?= false
 
 CONTROLLER_GEN_VERSION := v0.6.1
@@ -54,7 +56,10 @@ endef
 default: image
 
 image:
-	docker build -t docker.io/${ORG}/${PROJECT}:${TAG} .
+	docker build -t ${IMAGE}:${TAG} \
+	--build-arg HAWTIO_ONLINE_IMAGE_NAME=${HAWTIO_ONLINE_IMAGE_NAME} \
+	--build-arg HAWTIO_ONLINE_VERSION=${HAWTIO_ONLINE_VERSION} \
+	.
 
 build: go-generate compile test