FROM alpine:3.22

ARG HUGO_VERSION=0.165.0
ARG TARGETARCH

# the extended build is glibc-linked and will not run on alpine; nothing here
# needs sass or webp, so the plain static build is the one to use
RUN apk add --no-cache ca-certificates \
    && case "${TARGETARCH}" in \
         amd64) HUGO_ARCH=amd64 ;; \
         arm64) HUGO_ARCH=arm64 ;; \
         "") echo "TARGETARCH is empty; build with buildkit" >&2; exit 1 ;; \
         *) echo "unsupported arch ${TARGETARCH}" >&2; exit 1 ;; \
       esac \
    && HUGO_TAR="hugo_${HUGO_VERSION}_linux-${HUGO_ARCH}.tar.gz" \
    && BASE="https://github.com/gohugoio/hugo/releases/download/v${HUGO_VERSION}" \
    && wget -qO "/tmp/${HUGO_TAR}" "${BASE}/${HUGO_TAR}" \
    && wget -qO /tmp/checksums.txt "${BASE}/hugo_${HUGO_VERSION}_checksums.txt" \
    && grep " ${HUGO_TAR}$" /tmp/checksums.txt > /tmp/expected.sha256 \
    && test -s /tmp/expected.sha256 \
    && (cd /tmp && sha256sum -c expected.sha256) \
    && tar -xzf "/tmp/${HUGO_TAR}" -C /usr/local/bin hugo \
    && rm -f "/tmp/${HUGO_TAR}" /tmp/checksums.txt /tmp/expected.sha256

WORKDIR /site
COPY ./ /site
EXPOSE 1313
CMD ["hugo", "server", "--bind", "0.0.0.0", "--port", "1313", "--baseURL", "http://127.0.0.1:1313/", "--appendPort=false"]