Dockerfile.cross

FROM --platform=$BUILDPLATFORM golang:alpine3.14 AS builder
WORKDIR /project
COPY tif.go .
COPY go.* ./
RUN go mod tidy

ARG TARGETOS
ARG TARGETARCH
ENV GOOS=$TARGETOS GOARCH=$TARGETARCH
RUN CGO_ENABLED=0 go build -a -ldflags '-extldflags "-static"' -o thisisfine tif.go

FROM scratch AS release-linux
COPY --from=builder /project/thisisfine /thisisfine
ENV TERM="xterm-256color"
ENTRYPOINT ["/thisisfine"]

FROM mcr.microsoft.com/windows/nanoserver:1809 AS release-windows
COPY --from=builder /project/thisisfine /thisisfine.exe
ENV TERM="xterm-256color"
ENTRYPOINT ["\\thisisfine.exe"]

FROM release-$TARGETOS