FROM --platform=linux/amd64 golang:1.21 AS build

ARG TARGETOS TARGETARCH TARGETVARIANT
ENV GOOS $TARGETOS
ENV GOARCH $TARGETARCH

RUN apt-get update && \
    apt-get install -y --no-install-recommends ca-certificates && \
    case "$TARGETARCH$TARGETVARIANT" in \
        "arm64")   apt-get install -y gcc-aarch64-linux-gnu ;; \
        "armv7")   apt-get install -y gcc-arm-linux-gnueabihf ;; \
        "riscv64") apt-get install -y gcc-riscv64-linux-gnu ;; \
        *)         apt-get install -y gcc ;; \
    esac

WORKDIR /tmp/app
COPY . .
RUN go mod download && \
    case "$TARGETARCH$TARGETVARIANT" in \
        "arm64")   export CC="aarch64-linux-gnu-gcc" PIE=true ;; \
        "armv7")   export CC="arm-linux-gnueabihf-gcc" GOARM="7" ;; \
        "riscv64") export CC="riscv64-linux-gnu-gcc" ;; \
        *)         export CC="gcc" PIE=true ;; \
    esac && \
    export CGO_ENABLED=1 && \
    if [ $PIE = true ]; then \
        go build -a -buildmode=pie -trimpath -ldflags "-s -w -linkmode 'external' -extldflags '-static-pie' -X main.prefix=" -o discord-tweeter; \
    else \
        go build -a -trimpath -ldflags "-s -w -linkmode 'external' -extldflags '-static' -X main.prefix=" -o discord-tweeter; \
    fi

FROM scratch

COPY --from=build /etc/ssl/certs/ca-certificates.crt /etc/ssl/certs/

WORKDIR /app
COPY --from=build /tmp/app/discord-tweeter .
#COPY ./config.example.toml ./config.toml

ENTRYPOINT [ "./discord-tweeter" ]
# CMD [ "./config.toml" ]