FROM --platform=$BUILDPLATFORM golang:alpine AS builder

WORKDIR /app

COPY go.mod go.sum ./
# RUN go mod download
COPY *.go ./
COPY cmd ./cmd
COPY internal ./internal

# Build
ARG TARGETOS TARGETARCH
RUN CGO_ENABLED=0 GOGC=75 GOOS=$TARGETOS GOARCH=$TARGETARCH go build -ldflags "-w -s" -o /agent ./cmd/agent

RUN rm -rf /tmp/*

# --------------------------
# Final image: default scratch-based agent
# --------------------------
FROM scratch
COPY --from=builder /agent /agent

# this is so we don't need to create the /tmp directory in the scratch container
COPY --from=builder /tmp /tmp

ENTRYPOINT ["/agent"]