Dockerfile-build

FROM ubuntu:jammy

ARG GO_VERSION="1.23.0"
ARG USER_ID
ARG GROUP_ID

RUN apt-get update

######################### install go
RUN apt install -yq wget
RUN wget "https://go.dev/dl/go${GO_VERSION}.linux-amd64.tar.gz" && \
    rm -rf /usr/local/go && \
    tar -C /usr/local -xzf "go${GO_VERSION}.linux-amd64.tar.gz" && \
    rm -f "${GO_VERSION}.linux-amd64.tar.gz"

RUN ln -sf /usr/local/go/bin/go /usr/local/bin/go
RUN ln -sf /usr/local/go/bin/gofmt /usr/local/bin/gofmt

########################### install stuff to build libvirt drivers
RUN apt install -yq build-essential git libvirt-dev

#################### create unprivileged user
RUN addgroup --gid $GROUP_ID build && \
    adduser --disabled-password --uid $USER_ID --gid $GROUP_ID build
USER build

############ setup slight caching
RUN mkdir -p /home/build/go/pkg/mod

ENV GOMODCACHE=/home/build/go/pkg/mod
ENV GOPATH=/home/build/go