release: improve new release-docker script

Author: zegl

Dockerfile

@@ -59,7 +59,8 @@ RUN --mount=type=cache,target=/root/.cache/go-build \
 FROM ${ALPINE_IMAGE} as runner
 RUN apk update && \
     apk upgrade && \
-    apk add bash ca-certificates
+    apk add bash ca-certificates git
+
 COPY --from=downloader /usr/bin/helm /usr/bin/helm
 COPY --from=downloader /usr/bin/kustomize /usr/bin/kustomize
 COPY --from=builder /usr/bin/kube-score /kube-score

hack/release-docker.sh

@@ -1,16 +1,35 @@
 #!/bin/bash
 
+set -euo pipefail
+
+function echoinfo() {
+	LIGHT_GREEN='\033[1;32m'
+	NC='\033[0m' # No Color
+	printf "${LIGHT_GREEN}%s${NC}\n" "$1"
+}
+
+
 VERSION="$(git describe --tags --abbrev=0)"
+TAG_ARGS="-t zegl/kube-score:${VERSION}"
+PLATFORM_ARGS=""
+PUSH_OR_LOAD_ARG="--load"
 
-# TODO(gustav): also push latest!
+if [ -z ${PUSH_LATEST+x} ]; then
+    echoinfo "[x] Dry run. (Set PUSH_LATEST if you want to push and tag latest)"
+else 
+    echoinfo "[x] Making production build. Will push to Docker Hub!"
+    TAG_ARGS="${TAG_ARGS} -t zegl/kube-score:latest"
+    PLATFORM_ARGS="--platform linux/arm64 --platform linux/amd64"
+    PUSH_OR_LOAD_ARG="--push"
+    PUSH_OR_LOAD_ARG=""
+fi
 
 docker buildx build \
     --build-arg KUBE_SCORE_VERSION=${VERSION} \
     --build-arg "KUBE_SCORE_COMMIT=$(git rev-parse HEAD)" \
     --build-arg "KUBE_SCORE_DATE=$(date -Iseconds)" \
-    --platform linux/arm64 \
-    --platform linux/amd64 \
-    -t zegl/kube-score:${VERSION} \
-    --push \
+    ${PLATFORM_ARGS} \
+    ${TAG_ARGS} \
+    ${PUSH_OR_LOAD_ARG} \
     --target runner \
     .