FROM alpine:3.18.2 as build

ARG SQUID_VER=6.2

RUN set -x && \
	apk add --no-cache  \
		gcc \
		g++ \
		libc-dev \
		curl \
		gnupg \
		openssl-dev \
		openssl-libs-static \
		perl-dev \
		autoconf \
		automake \
		make \
		pkgconfig \
		heimdal-dev \
		libtool \
		libcap-dev \
		linux-headers

WORKDIR /tmp/build

RUN set -x && \
	curl -SsL http://www.squid-cache.org/Versions/v${SQUID_VER%%.*}/squid-${SQUID_VER}.tar.gz -o squid-${SQUID_VER}.tar.gz && \
	curl -SsL http://www.squid-cache.org/Versions/v${SQUID_VER%%.*}/squid-${SQUID_VER}.tar.gz.asc -o squid-${SQUID_VER}.tar.gz.asc

COPY squid-keys.asc /tmp/build

RUN set -x && \
	GNUPGHOME="$(mktemp -d)" && \
	export GNUPGHOME && \
	gpg --import squid-keys.asc && \
	gpg --batch --verify squid-${SQUID_VER}.tar.gz.asc squid-${SQUID_VER}.tar.gz && \
	rm -rf "$GNUPGHOME"

RUN set -x && \
	tar --strip 1 -xzf squid-${SQUID_VER}.tar.gz && \
	\
	MACHINE=$(uname -m) && \
	\
	CFLAGS="-g0 -O2" \
	CXXFLAGS="-g0 -O2" \
	LDFLAGS="-s" \
	\
	./configure \
		--build="$MACHINE" \
		--host="$MACHINE" \
		--prefix=/usr \
		--datadir=/usr/share/squid \
		--sysconfdir=/etc/squid \
		--libexecdir=/usr/lib/squid \
		--localstatedir=/var \
		--with-logdir=/var/log/squid \
		--disable-strict-error-checking \
		--disable-arch-native \
		--enable-removal-policies="lru,heap" \
		--enable-auth-digest \
		--enable-auth-basic="getpwnam,NCSA,DB,RADIUS" \
		--enable-basic-auth-helpers="DB" \
		--enable-epoll \
		--enable-external-acl-helpers="file_userip,unix_group,wbinfo_group" \
		--enable-auth-ntlm="fake" \
		--enable-auth-negotiate="kerberos,wrapper" \
		--enable-silent-rules \
		--disable-mit \
		--enable-heimdal \
		--enable-delay-pools \
		--enable-arp-acl \
		--enable-openssl \
		--enable-ssl-crtd \
		--enable-security-cert-generators="file" \
		--enable-ident-lookups \
		--enable-useragent-log \
		--enable-cache-digests \
		--enable-referer-log \
		--enable-async-io \
		--enable-truncate \
		--enable-arp-acl \
		--enable-htcp \
		--enable-carp \
		--enable-epoll \
		--enable-follow-x-forwarded-for \
		--enable-storeio="diskd rock" \
		--enable-ipv6 \
		--enable-translation \
		--disable-snmp \
		--disable-dependency-tracking \
		--with-large-files \
		--with-default-user=squid \
		--with-openssl \
		--with-pidfile=/var/run/squid/squid.pid

RUN set -x && \
	nproc=$(n=$(nproc) ; max_n=6 ; echo $(( n <= max_n ? n : max_n )) ) && \
	make -j $nproc && \
	make install

WORKDIR /tmp/build/tools/squidclient
RUN make && make install-strip

RUN sed -i '1s;^;include /etc/squid/conf.d/*.conf\n;' /etc/squid/squid.conf && \
	echo 'include /etc/squid/conf.d.tail/*.conf' >> /etc/squid/squid.conf

# --- --- --- --- --- --- --- --- ---

FROM alpine:3.18.2
	
ENV SQUID_CONFIG_FILE /etc/squid/squid.conf
ENV TZ Europe/Moscow

RUN set -x && \
	deluser squid 2>/dev/null; delgroup squid 2>/dev/null; \
	addgroup -S squid -g 3128 && adduser -S -u 3128 -G squid -g squid -H -D -s /bin/false -h /var/cache/squid squid

RUN apk add --no-cache \
		libstdc++ \
		heimdal-libs \
		libcap \
		libltdl

COPY --from=build /etc/squid/ /etc/squid/
COPY --from=build /usr/lib/squid/ /usr/lib/squid/
COPY --from=build /usr/share/squid/ /usr/share/squid/
COPY --from=build /usr/sbin/squid /usr/sbin/squid
COPY --from=build /usr/bin/squidclient /usr/bin/squidclient

RUN install -d -o squid -g squid \
		/var/cache/squid \
		/var/log/squid \
		/var/run/squid && \
	chmod +x /usr/lib/squid/* && \
	install -d -m 755 -o squid -g squid \
		/etc/squid/conf.d \
		/etc/squid/conf.d.tail && \
	touch /etc/squid/conf.d/placeholder.conf
COPY squid-log.conf /etc/squid/conf.d.tail/

RUN	set -x && \
	apk add --no-cache --virtual .tz alpine-conf tzdata && \
	/sbin/setup-timezone -z $TZ && \
	apk del .tz

VOLUME ["/var/cache/squid"]
EXPOSE 3128/tcp

USER squid

CMD ["sh", "-c", "rm -f /var/run/squid/squid.pid ; /usr/sbin/squid -f ${SQUID_CONFIG_FILE} --foreground -z && exec /usr/sbin/squid -f ${SQUID_CONFIG_FILE} --foreground -YCd 1"]