##### this stage will download latest tarball

FROM alpine:latest as prep

ARG HUGO_ARCH=amd64

RUN \
    apk --no-cache upgrade && \
    apk --no-cache add curl jq && \
    LATEST_RELEASE=$(curl -L -s -H 'Accept: application/json' https://github.com/gohugoio/hugo/releases/latest | jq --raw-output ".tag_name" | sed 's/^v//' ) && \
    URL="https://github.com/gohugoio/hugo/releases/download/v${LATEST_RELEASE}/hugo_extended_${LATEST_RELEASE}_linux-${HUGO_ARCH}.tar.gz " && \
    echo "Downloading: ${URL}" && \
    wget "${URL}" -O - | tar xzv -C /tmp

##### final image

FROM alpine:latest

COPY --from=prep /tmp/hugo /usr/local/bin/hugo

RUN \
    apk --no-cache upgrade && \
    apk --no-cache add gcompat libstdc++

ENTRYPOINT [ "/usr/local/bin/hugo" ]