FROM ubuntu:bionic
ENV LANG_VER=1.12.5
ENV LANG_NAME=Go

RUN apt-get update && apt-get install -y \
  curl \
  gcc \
  git

WORKDIR /root

# Download Go 1.4 to use as a bootstrap for building Go from the source.
RUN curl -o go1.4.linux-amd64.tar.gz https://dl.google.com/go/go1.4.linux-amd64.tar.gz
RUN curl -LJO https://github.com/golang/go/archive/go${LANG_VER}.tar.gz
RUN mkdir bootstr
RUN tar -C bootstr -xzf go1.4.linux-amd64.tar.gz
RUN tar -xzf go-go${LANG_VER}.tar.gz
RUN mv go-go${LANG_VER} go

ENV GOROOT=/root/go
ENV GOROOT_BOOTSTRAP=/root/bootstr/go
ENV LANG_DIR=${GOROOT}

WORKDIR ${LANG_DIR}/src
RUN ./make.bash

WORKDIR ${LANG_DIR}

COPY proctor-go.go ${LANG_DIR}

ENTRYPOINT ["/root/go/bin/go", "run", "proctor-go.go"]