Dockerfile-builder

FROM debian:9.5-slim

RUN apt-get update && apt-get install -y \
    git \
    make \
    curl \
    wget && \
    apt-get clean && \
    rm -rf /var/lib/apt/lists/* /tmp/* /var/tmp/*

# Install go
ENV GO_VERSION 1.10.3
ENV GO_ARCH amd64
ENV GOPATH /root/go
ENV PATH ${GOPATH}/bin:/usr/local/go/bin:${PATH}
RUN wget https://storage.googleapis.com/golang/go${GO_VERSION}.linux-${GO_ARCH}.tar.gz && \
    tar -C /usr/local/ -xf /go${GO_VERSION}.linux-${GO_ARCH}.tar.gz && \
    rm /go${GO_VERSION}.linux-${GO_ARCH}.tar.gz && \
    wget https://github.com/golang/dep/releases/download/v0.5.0/dep-linux-amd64 -O /usr/local/bin/dep && \
    chmod +x /usr/local/bin/dep && \
    mkdir -p ${GOPATH}/bin && \
    curl -sLo- https://github.com/alecthomas/gometalinter/releases/download/v2.0.5/gometalinter-2.0.5-linux-amd64.tar.gz | \
      tar -xzC "$GOPATH/bin" --exclude COPYING --exclude README.md --strip-components 1 -f-

# A dummy directory is created under $GOPATH/src/dummy so we are able to use dep
# to install all the packages of our dep lock file
COPY Gopkg.toml ${GOPATH}/src/dummy/Gopkg.toml
COPY Gopkg.lock ${GOPATH}/src/dummy/Gopkg.lock
RUN cd ${GOPATH}/src/dummy && \
    dep ensure -vendor-only && \
    mv vendor/* ${GOPATH}/src/ && \
    rmdir vendor