pkg/scaffold/build_dockerfile*.go: multi-stage, customizeable Dockerfile

Author: estroz

pkg/scaffold/build_dockerfile.go

@@ -34,9 +34,27 @@ func (s *Dockerfile) GetInput() (input.Input, error) {
 	return s.Input, nil
 }
 
-const dockerfileTmpl = `FROM alpine:3.6
+const dockerfileTmpl = `# Binary builder image
+FROM golang:1.10.3 AS builder
+
+ENV GOPATH /go
+ENV CGO_ENABLED 0
+ENV GOOS linux
+ENV GOARCH amd64
+
+WORKDIR /go/src/{{ .Repo }}
+COPY . /go/src/{{ .Repo }}
+
+RUN go build -o /go/bin/{{ .ProjectName }} {{ .Repo }}/cmd/{{ .ProjectName }}/main.go
+
+# Base image
+FROM alpine:3.6
+COPY --from=builder /go/bin/{{ .ProjectName }} /usr/local/bin/{{ .ProjectName }}
 
 USER nobody
 
-ADD build/_output/bin/{{.ProjectName}} /usr/local/bin/{{.ProjectName}}
+# Add customizations here.
+
+
+ENTRYPOINT ["{{ .ProjectName }}"]
 `

pkg/scaffold/build_dockerfile_test.go

@@ -31,9 +31,27 @@ func TestDockerfile(t *testing.T) {
 	}
 }
 
-const dockerfileExp = `FROM alpine:3.6
+const dockerfileExp = `# Binary builder image
+FROM golang:1.10.3 AS builder
+
+ENV GOPATH /go
+ENV CGO_ENABLED 0
+ENV GOOS linux
+ENV GOARCH amd64
+
+WORKDIR /go/src/github.com/example-inc/app-operator
+COPY . /go/src/github.com/example-inc/app-operator
+
+RUN go build -o /go/bin/app-operator github.com/example-inc/app-operator/cmd/app-operator/main.go
+
+# Base image
+FROM alpine:3.6
+COPY --from=builder /go/bin/app-operator /usr/local/bin/app-operator
 
 USER nobody
 
-ADD build/_output/bin/app-operator /usr/local/bin/app-operator
+# Add customizations here.
+
+
+ENTRYPOINT ["app-operator"]
 `