FROM alpine:3 as builder

ARG HAPROXY_VERSION=
ARG HAPROXY_REPO

RUN \
    apk update --no-cache && \
    apk add --no-cache --virtual \
        build-deps \
        ca-certificates \
        gcc \
        git \
        libc-dev \
        linux-headers \
        lua5.3-dev \
        make \
        openssl \
        openssl-dev \
        pcre2-dev \
        tar \
        zlib-dev \
        curl \
        shadow \
    && \
    git config --global advice.detachedHead false

RUN \
    echo "selected repo: ${HAPROXY_REPO}" && \
        if [ -z "${HAPROXY_VERSION}" ]; then \
        HAPROXY_VERSION=$( \
            git ls-remote "${HAPROXY_REPO}" | \
            awk '$2 ~ /^refs\/tags\/v[0-9]+\.[0-9]+\.[0-9]+$/ { print substr($2,11) }' | sort -V | tail -n1 \
        ) ; \
    fi && \
    echo "selected branch: ${HAPROXY_VERSION}" && \
    cd / && \
    git clone \
        --branch="${HAPROXY_VERSION}" \
        --depth=1 \
        "${HAPROXY_REPO}" \
        haproxy && \
    cd haproxy && \
    make \
        -j"$(nproc)" \
        TARGET=linux-musl \
        CPU=generic \
        USE_PCRE2=1 \
        USE_PCRE2_JIT=1 \
        USE_REGPARM=1 \
        USE_OPENSSL=1 \
        USE_ZLIB=1 \
        USE_TFO=1 \
        USE_LINUX_TPROXY=1 \
        USE_GETADDRINFO=1 \
        USE_LUA=1 \
        LUA_LIB=/usr/lib/lua5.3 \
        LUA_INC=/usr/include/lua5.3 \
        EXTRA_OBJS="contrib/prometheus-exporter/service-prometheus.o" \
        all

FROM alpine:3

ENV UID=1000
ENV GID=1000

RUN \
    apk update --no-cache && \
    apk add --no-cache --virtual \
        openssl \
        zlib \
        lua5.3-libs \
        pcre2

COPY --from=builder /haproxy/haproxy /haproxy
COPY docker-entrypoint.sh /docker-entrypoint.sh

ENTRYPOINT /docker-entrypoint.sh