FROM golang:1.25.7-alpine3.22 AS build
ARG VERSION="0.1.0"
ENV VERSION=$VERSION

COPY . /src

RUN cd /src \
    && CGO_ENABLED=0 GORISCV64=rva22u64 GOAMD64=v3 GOARM64=v8.2 go build -ldflags="-s -w -X docker-updater/constant.version=$VERSION" -o dockerupdater \
    && mkdir -p ./fs/var/opt/dockerupdater \
    && mkdir -p ./fs/opt/dockerupdater \
    && cp dockerupdater ./fs/opt/dockerupdater/dockerupdater

FROM scratch AS prod

COPY --from=build --chmod=755 /src/fs /

ENTRYPOINT [ "/opt/dockerupdater/dockerupdater" ]