# vim:set ft=dockerfile:
FROM alpine:3.4

# alpine includes "postgres" user/group in base install
# /etc/passwd:22:postgres:x:70:70::/var/lib/postgresql:/bin/sh
# /etc/group:34:postgres:x:70:

# su-exec (gosu-compatible) is installed further down

# make the "en_US.UTF-8" locale so postgres will be utf-8 enabled by default
# alpine doesn't require explicit locale-file generation
ENV LANG en_US.utf8

RUN mkdir /docker-entrypoint-initdb.d

ENV PG_MAJOR %%PG_MAJOR%%
ENV PG_VERSION %%PG_VERSION%%
ENV PG_SHA256 %%PG_SHA256%%

RUN set -ex \
	\
	&& apk add --no-cache --virtual .fetch-deps \
		ca-certificates \
		openssl \
		tar \
	\
	&& wget -O postgresql.tar.bz2 "https://ftp.postgresql.org/pub/source/v$PG_VERSION/postgresql-$PG_VERSION.tar.bz2" \
	&& echo "$PG_SHA256 *postgresql.tar.bz2" | sha256sum -c - \
	&& mkdir -p /usr/src/postgresql \
	&& tar \
		--extract \
		--file postgresql.tar.bz2 \
		--directory /usr/src/postgresql \
		--strip-components 1 \
	&& rm postgresql.tar.bz2 \
	\
	&& apk add --no-cache --virtual .build-deps \
		bison \
		flex \
		gcc \
#		krb5-dev \
		libc-dev \
		libedit-dev \
		libxml2-dev \
		libxslt-dev \
		make \
#		openldap-dev \
		openssl-dev \
		perl \
#		perl-dev \
#		python-dev \
#		python3-dev \
#		tcl-dev \
		util-linux-dev \
		zlib-dev \
	\
	&& cd /usr/src/postgresql \
# configure options taken from:
# https://anonscm.debian.org/cgit/pkg-postgresql/postgresql.git/tree/debian/rules?h=9.5
	&& ./configure \
# "/usr/src/postgresql/src/backend/access/common/tupconvert.c:105: undefined reference to `libintl_gettext'"
#		--enable-nls \
		--enable-integer-datetimes \
		--enable-thread-safety \
		--enable-tap-tests \
# skip debugging info -- we want tiny size instead
#		--enable-debug \
		--disable-rpath \
		--with-uuid=e2fs \
		--with-gnu-ld \
		--with-pgport=5432 \
		--with-system-tzdata=/usr/share/zoneinfo \
		--prefix=/usr/local \
		\
# these make our image abnormally large (at least 100MB larger), which seems uncouth for an "Alpine" (ie, "small") variant :)
#		--with-krb5 \
#		--with-gssapi \
#		--with-ldap \
#		--with-tcl \
#		--with-perl \
#		--with-python \
#		--with-pam \
		--with-openssl \
		--with-libxml \
		--with-libxslt \
	&& make -j "$(getconf _NPROCESSORS_ONLN)" world \
	&& make install-world \
	&& make -C contrib install \
	\
	&& runDeps="$( \
		scanelf --needed --nobanner --recursive /usr/local \
			| awk '{ gsub(/,/, "\nso:", $2); print "so:" $2 }' \
			| sort -u \
			| xargs -r apk info --installed \
			| sort -u \
	)" \
	&& apk add --no-cache --virtual .postgresql-rundeps \
		$runDeps \
		bash \
		su-exec \
	&& apk del .build-deps \
	&& cd / \
	&& rm -rf \
		/usr/src/postgresql \
		/usr/local/include/* \
	&& find /usr/local -name '*.a' -delete

RUN mkdir -p /var/run/postgresql && chown -R postgres /var/run/postgresql

ENV PATH /usr/lib/postgresql/$PG_MAJOR/bin:$PATH
ENV PGDATA /var/lib/postgresql/data
VOLUME /var/lib/postgresql/data

COPY docker-entrypoint.sh /

ENTRYPOINT ["/docker-entrypoint.sh"]

EXPOSE 5432
CMD ["postgres"]