# Ver: 1.12 by Endial Fang (endial@126.com)
#

# 系统默认变量 ====================================================================
# 该部分变量为系统根据编译命令默认设置
# `TARGETPLATFORM`：构建后的目标平台信息。如 `linux/amd64`，`linux/arm/v7`，`windows/amd64`
# `TARGETOS`：目标平台信息（TARGETPLATFORM）中的操作系统部分，如：`linux`、`windows`
# `TARGETARCH`：目标平台信息（TARGETPLATFORM）中的平台架构部分，如：`amd64`、`arm`
# `TARGETVARIANT`：目标平台信息（TARGETPLATFORM）中的版本变体部分，如：`v7`
# `BUILDPLATFORM`：用于构建的节点平台信息
# `BUILDOS`：用于构建的节点平台信息（BUILDPLATFORM）中的操作系统部分
# `BUILDARCH`用于构建的节点平台信息（BUILDPLATFORM）中的平台架构部分
# `BUILDVARIANT`用于构建的节点平台信息（BUILDPLATFORM）中的版本变体部分

# 可变参数 ========================================================================
# 该部分变量，在编译命令中通过 `--build-arg` 传入；如果未设置，则使用下面对应的默认值

ARG APP_NAME=postgresql										# 设置当前应用名称
ARG APP_VER=13.12											# 设置当前应用版本
ARG REGISTRY_URL="docker.colovu.com/"						# 设置默认仓库地址，默认为本地仓库；定义时需要包含末尾的`/`
ARG APT_SOURCE=aliyun										# 设置 apt-get 源：default / ustc / aliyun
ARG LOCAL_URL="http://local.colovu.com/dist"				# 编译镜像时指定用于加速的本地软件包存储服务器地址

# 0. 预处理 ======================================================================
FROM --platform=${TARGETPLATFORM:-linux/amd64} ${REGISTRY_URL}colovu/dbuilder:12 as builder

# 声明需要使用的全局可变参数
ARG APP_NAME
ARG APP_VER
ARG APT_SOURCE
ARG LOCAL_URL

# 选择软件包源，加速后续软件包安装
RUN select_source ${APT_SOURCE};

# 安装依赖的软件包及库
RUN install_pkg bison flex libedit-dev libxml2-dev libxslt-dev zlib1g-dev libreadline-dev uuid-dev \
	libperl-dev libicu-dev libxslt1-dev libssl-dev libldap2-dev libkrb5-dev libpam0g-dev libselinux1-dev;

# 下载并解压软件包
RUN set -eux; \
	appName="${APP_NAME}-${APP_VER}.tar.gz"; \
	sha256="3aef84ff557087bd01df4365a7a85e11678faa55ab6fb6c4283d57e41997a80c"; \
	[ -n ${LOCAL_URL} ] && localURL=${LOCAL_URL}/${APP_NAME}; \
	appUrls="${localURL:-} \
		https://ftp.postgresql.org/pub/source/v${APP_VER} \
		"; \
	download_pkg unpack ${appName} "${appUrls}" -s "${sha256}";

# 源码编译
RUN set -eux; \
	APP_ARCH=`arch` \
	APP_SRC="/tmp/${APP_NAME}-${APP_VER}"; \
	dpkgArch="$(dpkg --print-architecture)"; \
	cd ${APP_SRC}; \
	\
# update "DEFAULT_PGSOCKET_DIR" to "/var/run/postgresql" (matching Debian)
# see https://anonscm.debian.org/git/pkg-postgresql/postgresql.git/tree/debian/patches/51-default-sockets-in-var.patch?id=8b539fcb3e093a521c095e70bdfa76887217b89f
	awk '$1 == "#define" && $2 == "DEFAULT_PGSOCKET_DIR" && $3 == "\"/tmp\"" { $3 = "\"/var/run/postgresql\""; print; next } { print }' src/include/pg_config_manual.h > src/include/pg_config_manual.h.new; \
	grep '/var/run/postgresql' src/include/pg_config_manual.h.new; \
	mv src/include/pg_config_manual.h.new src/include/pg_config_manual.h; \
	gnuArch="$(dpkg-architecture --query DEB_BUILD_GNU_TYPE)"; \
# explicitly update autoconf config.guess and config.sub so they support more arches/libcs
	wget -O config/config.guess 'https://git.savannah.gnu.org/cgit/config.git/plain/config.guess?id=7d3d27baf8107b630586c962c057e22149653deb'; \
	wget -O config/config.sub 'https://git.savannah.gnu.org/cgit/config.git/plain/config.sub?id=7d3d27baf8107b630586c962c057e22149653deb'; \
	\
# configure options taken from:
# https://anonscm.debian.org/cgit/pkg-postgresql/postgresql.git/tree/debian/rules?h=9.5
	LDFLAGS="-L/usr/local/lib -L/usr/lib/${APP_ARCH}-linux-gnu" \
	CPPFLAGS="-I/usr/local/include -D_GNU_SOURCE" \
	./configure \
		--prefix=/usr/local/${APP_NAME} \
		--build="$gnuArch" \
		--enable-integer-datetimes \
		--enable-thread-safety \
		--disable-rpath \
		--with-uuid=e2fs \
		--with-gnu-ld \
		--with-pgport=5432 \
		--with-system-tzdata=/usr/share/zoneinfo \
		--with-includes=/usr/local/include \
		--with-libraries=/usr/local/lib \
		--with-openssl \
		--with-libxml \
		--with-libxslt \
		--with-icu \
		--with-krb5 \
		--with-ldap \
#		--enable-tap-tests \
# "/usr/src/postgresql/src/backend/access/common/tupconvert.c:105: undefined reference to `libintl_gettext'"
#		--enable-nls \
# these make our image abnormally large (at least 100MB larger), which seems uncouth for an "Alpine" (ie, "small") variant :)
#		--enable-debug \
#		--with-gssapi \
#		--with-tcl \
#		--with-perl \
#		--with-python \
#		--with-pam \
	; \
	make -j "$(nproc)" world && make install-world; \
	make -C contrib install;

# 删除编译生成的多余文件
RUN set -eux; \
	find /usr/local -name '*.a' -delete; \
	rm -rf /usr/local/${APP_NAME}/include;

# 检测并生成依赖文件记录
RUN set -eux; \
	find /usr/local/${APP_NAME} -type f -executable -exec ldd '{}' ';' | \
		awk '/=>/ { print $(NF-1) }' | xargs -r basename -a | sort -u | \
		xargs -r dpkg-query --search 2>/dev/null | cut -d: -f1 | sort -u \
		>>/usr/local/${APP_NAME}/runDeps;

# 1. 生成镜像 =====================================================================
FROM --platform=${TARGETPLATFORM:-linux/amd64} ${REGISTRY_URL}colovu/debian:12

# 声明需要使用的全局可变参数（ARG声明的变量仅编译打包阶段有效）
ARG APP_NAME
ARG APP_VER
ARG APT_SOURCE

# 定义应用的基础信息变量（ENV声明的变量实例化后容器内有效）
ENV APP_NAME=${APP_NAME} \
	APP_VER=${APP_VER} \
	APP_EXEC=postgres \
	APP_USER=postgres \
	\
	LD_LIBRARY_PATH="/usr/local/${APP_NAME}/lib" \
	PATH="${PATH}:/usr/local/${APP_NAME}/bin"

LABEL \
	"Version"="v${APP_VER}" \
	"Description"="Docker image for ${APP_NAME}." \
	"Github"="https://github.com/colovu/docker-${APP_NAME}" \
	"Vendor"="Endial Fang (endial@126.com)"

# 拷贝多阶段构建结果输出及客制化脚本
COPY --from=builder /usr/local/${APP_NAME} /usr/local/${APP_NAME}
COPY customer /

RUN set -eux; \
	\
	# 创建对应的用户及数据存储目录
	useradd -U -u 996 -d /srv/${APP_NAME} -s /usr/sbin/nologin -r ${APP_USER}; \
	mkdir -p /var/log/${APP_NAME} /var/run/${APP_NAME} /var/cache/${APP_NAME}; \
	mkdir -p /srv/${APP_NAME}/conf /srv/${APP_NAME}/data /srv/${APP_NAME}/cert /srv/${APP_NAME}/log; \
	chown -R ${APP_USER}:${APP_USER} /var/log/${APP_NAME} /var/run/${APP_NAME} /var/cache/${APP_NAME}; \
	chown -R ${APP_USER}:${APP_USER} /usr/local/${APP_NAME} /srv/${APP_NAME}; \
	\
	/bin/bash -c "ln -sf /usr/local/${APP_NAME}/etc/${APP_NAME} /etc/"; \
	\
	# 选择软件包源，以加速后续软件包安装
	select_source ${APT_SOURCE}; \
	\
	# 安装应用依赖的软件包及库
	install_pkg `cat /usr/local/${APP_NAME}/runDeps`; \
	\
	# 执行后处理脚本
	overrideShell="/usr/local/overrides/overrides-${APP_VER}.sh"; \
	[ -e "${overrideShell}" ] && /bin/bash "${overrideShell}"; \
	\
	# 验证安装的应用
	${APP_EXEC} --version ;

# 配置容器的数据卷、工作目录及服务端口（必须保证端口在1024之上）
VOLUME ["/srv/${APP_NAME}/conf", "/srv/${APP_NAME}/data", "/srv/${APP_NAME}/cert", "/srv/${APP_NAME}/log"]
WORKDIR /srv/${APP_NAME}/data
EXPOSE 5432
STOPSIGNAL SIGINT

#HEALTHCHECK NONE
#HEALTHCHECK --interval=30s --timeout=30s --retries=3 CMD curl -fs http://localhost:8080/ || exit 1
#HEALTHCHECK --interval=10s --timeout=10s --retries=3 CMD netstat -ltun | grep 8080
HEALTHCHECK CMD PGPASSWORD="${PG_POSTGRES_PASSWORD:-${PG_PASSWORD}}" psql -h 127.0.0.1 -d postgres -U postgres -At -c "select version();" || exit 1

# 使用 dumb-init 启动入口 Shell，确保容器可以接收控制信号；并使用前台方式启动应用程序
ENTRYPOINT ["dumb-init", "entry.sh"]
CMD ["run.sh"]