# Build the manager binary

FROM golang:1 AS builder

ARG TARGETOS

ARG TARGETARCH

WORKDIR /workspace

# Copy the Go Modules manifests

COPY go.mod go.mod

COPY go.sum go.sum

# Copy the go source

COPY api/ api/

COPY cmd/ cmd/

COPY internal/ internal/

# Copy downloaded dependencies

# NOTE: run `go work vendor || go mod vendor` if dir does not exist

COPY vendor/ vendor/

# Build

# the GOARCH has not a default value to allow the binary be built according to the host where the command

# was called. For example, if we call make docker-build in a local env which has the Apple Silicon M1 SO

# the docker BUILDPLATFORM arg will be linux/arm64 when for Apple x86 it will be linux/amd64. Therefore,

# by leaving it empty we can ensure that the container and binary shipped on it will have the same platform.

RUN CGO_ENABLED=0 GOOS=${TARGETOS:-linux} GOARCH=${TARGETARCH} go build -mod vendor -a -o manager cmd/manager/main.go

RUN CGO_ENABLED=0 GOOS=${TARGETOS:-linux} GOARCH=${TARGETARCH} go build -mod vendor -a -o webhook cmd/webhook/main.go

# Use distroless as minimal base image to package the manager binary

# Refer to https://github.com/GoogleContainerTools/distroless for more details

FROM gcr.io/distroless/static:nonroot

WORKDIR /

COPY --from=builder /workspace/manager .

COPY --from=builder /workspace/webhook .

USER 65532:65532

ENTRYPOINT ["/manager"]