FROM golang:1.20@sha256:2edf6aab2d57644f3fe7407132a0d1770846867465a39c2083770cf62734b05d

ENV GOOS=linux
ENV GOARCH=arm
ENV CGO_ENABLED=1
ENV CC=arm-linux-gnueabihf-gcc
ENV PATH="/go/bin/${GOOS}_${GOARCH}:${PATH}"
ENV PKG_CONFIG_PATH=/usr/lib/arm-linux-gnueabihf/pkgconfig

RUN dpkg --add-architecture armhf \
    && apt update \
    && apt install -y --no-install-recommends \
        upx \
        gcc-arm-linux-gnueabihf \
        libc6-dev-armhf-cross \
        pkg-config \
    && rm -rf /var/lib/apt/lists/*

COPY . /src/workdir

WORKDIR /src/workdir

RUN go build ./...