add Dockerfile and build script

Dockerfile

@@ -0,0 +1,12 @@
+FROM docker.io/library/golang:1.17-alpine3.14 as build
+RUN apk --no-cache add make build-base git
+ARG GONOSUMDB
+ARG GOPROXY
+ARG GOBIN=/opt/bin
+ARG RELEASE="${RELEASE:-undefined}"
+WORKDIR /build
+ADD . .
+RUN STATIC=true make install
+
+FROM scratch
+COPY --from=build /opt/bin/goget /

Makefile

@@ -1,12 +1,17 @@
-BUILD_HASH := $(shell git describe --always --tags --long)
-LDFLAGS := "-X main.version=${BUILD_HASH} -s -w"
+COMMIT = $(shell git describe --always --tags --long --dirty)
+
+RELEASE ?= $(COMMIT)
+LDFLAGS := -X main.version=$(RELEASE)
+
+ifdef STATIC
+LDFLAGS += -w -s -extldflags=-static
+export CGO_ENABLED=0
+endif
+
+all: fmt install
+
+fmt:
+	go fmt ./...
 
-.PHONY: install
 install:
-	go fmt ./...
-	go install -ldflags ${LDFLAGS} ./...
-
-.PHONY: build
-build:
-	go fmt ./...
-	go build -ldflags ${LDFLAGS} ./...
+	go install -ldflags "${LDFLAGS}" ./...

build.sh

@@ -0,0 +1,14 @@
+#!/bin/sh -eu
+
+image="harbor.intern.drachenfels.de/shieldos/goget"
+version="$(git describe --always --tags --dirty)"
+
+buildah bud --layers \
+	--build-arg GOPROXY=$GOPROXY \
+	--build-arg GONOSUMDB=$GONOSUMDB \
+	--build-arg RELEASE=$version \
+	-t $image:latest \
+	-t $image:$version
+
+buildah push $image:latest
+buildah push $image:$version