#
# Taken from the official PHP image's Dockerfile
# (https://github.com/docker-library/php/tree/5c037abaf9dc0095e29807c048d9d1b97e6a9716/8.1/alpine3.21/cli),
# with the changes marked "chialab:".
#

# chialab: deb.sury.org's patches for this version, from the Salsa commit of the build named in PHP_PATCHES.
FROM scratch AS deb-patches
ARG DEB_PATCHES=https://salsa.debian.org/php-team/php/-/archive/4e430ad99622d9fabcee27d6dba438c81de716eb/php-4e430ad99622d9fabcee27d6dba438c81de716eb.tar.gz?path=debian/patches
ADD --unpack=true $DEB_PATCHES /

FROM alpine:3.21

# dependencies required for running "phpize"
# these get automatically installed and removed by "docker-php-ext-*" (unless they're already installed)
ENV PHPIZE_DEPS \
		autoconf \
		dpkg-dev dpkg \
		file \
		g++ \
		gcc \
		libc-dev \
		make \
		pkgconf \
		re2c

# persistent / runtime deps
RUN apk add --no-cache \
		ca-certificates \
		curl \
		openssl \
		tar \
		xz

# ensure www-data user exists
RUN set -eux; \
	adduser -u 82 -D -S -G www-data www-data
# 82 is the standard uid/gid for "www-data" in Alpine
# https://git.alpinelinux.org/aports/tree/main/apache2/apache2.pre-install?h=3.14-stable
# https://git.alpinelinux.org/aports/tree/main/lighttpd/lighttpd.pre-install?h=3.14-stable
# https://git.alpinelinux.org/aports/tree/main/nginx/nginx.pre-install?h=3.14-stable

ENV PHP_INI_DIR /usr/local/etc/php
RUN set -eux; \
	mkdir -p "$PHP_INI_DIR/conf.d"; \
# allow running as an arbitrary user (https://github.com/docker-library/php/issues/743)
	[ ! -d /var/www/html ]; \
	mkdir -p /var/www/html; \
	chown www-data:www-data /var/www/html; \
	chmod 1777 /var/www/html

# Apply stack smash protection to functions using local buffers and alloca()
# Make PHP's main executable position-independent (improves ASLR security mechanism, and has no performance impact on x86_64)
# Enable optimization (-O2)
# Enable linker optimization (this sorts the hash buckets to improve cache locality, and is non-default)
# https://github.com/docker-library/php/issues/272
# -D_LARGEFILE_SOURCE and -D_FILE_OFFSET_BITS=64 (https://www.php.net/manual/en/intro.filesystem.php)
ENV PHP_CFLAGS="-fstack-protector-strong -fpic -fpie -O2 -D_LARGEFILE_SOURCE -D_FILE_OFFSET_BITS=64"
ENV PHP_CPPFLAGS="$PHP_CFLAGS"
ENV PHP_LDFLAGS="-Wl,-O1 -pie"

ENV GPG_KEYS 528995BFEDFBA7191D46839EF9BA0ADA31CBD89E 39B641343D8C104B2B146DC3F9C39DC0B9698544 F1F692238FBC1666E5A5CCD4199F9DFEF6FFBAFD

ENV PHP_VERSION 8.1.34
ENV PHP_URL="https://www.php.net/distributions/php-8.1.34.tar.xz" PHP_ASC_URL="https://www.php.net/distributions/php-8.1.34.tar.xz.asc"
ENV PHP_SHA256="ffa9e0982e82eeaea848f57687b425ed173aa278fe563001310ae2638db5c251"

RUN set -eux; \
	\
	apk add --no-cache --virtual .fetch-deps gnupg; \
	\
	mkdir -p /usr/src; \
	cd /usr/src; \
	\
	curl -fsSL -o php.tar.xz "$PHP_URL"; \
	\
	if [ -n "$PHP_SHA256" ]; then \
		echo "$PHP_SHA256 *php.tar.xz" | sha256sum -c -; \
	fi; \
	\
	curl -fsSL -o php.tar.xz.asc "$PHP_ASC_URL"; \
	export GNUPGHOME="$(mktemp -d)"; \
	for key in $GPG_KEYS; do \
		gpg --batch --keyserver keyserver.ubuntu.com --recv-keys "$key"; \
	done; \
	gpg --batch --verify php.tar.xz.asc php.tar.xz; \
	gpgconf --kill all; \
	rm -rf "$GNUPGHOME"; \
	\
	apk del --no-network .fetch-deps

# chialab: helper scripts are added from the source commit.
ARG DOCKER_PHP_SCRIPTS=https://raw.githubusercontent.com/docker-library/php/5c037abaf9dc0095e29807c048d9d1b97e6a9716/8.1/alpine3.21/cli
ADD --chmod=755 $DOCKER_PHP_SCRIPTS/docker-php-source /usr/local/bin/

# chialab: security backports for this EOL version (see eol/patches).
ENV PHP_PATCHES="deb.sury.org-8.1.34-9"
LABEL it.chialab.php.patches="deb.sury.org-8.1.34-9"
RUN --mount=type=bind,from=deb-patches,target=/usr/src/deb-patches \
	--mount=type=bind,from=patches,source=series.8.1,target=/usr/src/php-series \
	--mount=type=bind,from=patches,source=docker-php-source-patch,target=/usr/local/bin/docker-php-source-patch \
	docker-php-source-patch /usr/src/php-series /usr/src/deb-patches

RUN set -eux; \
	apk add --no-cache --virtual .build-deps \
		$PHPIZE_DEPS \
		argon2-dev \
		coreutils \
		curl-dev \
		gnu-libiconv-dev \
		libsodium-dev \
		libxml2-dev \
		linux-headers \
		oniguruma-dev \
		openssl-dev \
		patch \
		patchutils \
		readline-dev \
		sqlite-dev \
	; \
	\
# make sure musl's iconv doesn't get used (https://www.php.net/manual/en/intro.iconv.php)
	rm -vf /usr/include/iconv.h; \
	\
	export \
		CFLAGS="$PHP_CFLAGS" \
		CPPFLAGS="$PHP_CPPFLAGS" \
		LDFLAGS="$PHP_LDFLAGS" \
# https://github.com/php/php-src/blob/d6299206dd828382753453befd1b915491b741c6/configure.ac#L1496-L1511
		PHP_BUILD_PROVIDER='https://github.com/docker-library/php' \
		PHP_UNAME='Linux - Docker' \
	; \
	docker-php-source extract; \
	cd /usr/src/php; \
# Apply patches; see https://github.com/docker-library/php/pull/1552
	# https://github.com/php/php-src/issues/11678
	curl -fL 'https://github.com/php/php-src/commit/577b8ae4226368e66fee7a9b5c58f9e2428372fc.patch?full_index=1' -o 11678.patch; \
	echo '6edc20c3bb3e7cc13515abce7f2fffa8ebea6cf7469abfbc78fcdc120350b239 *11678.patch' | sha256sum -c -; \
	patch -p1 < 11678.patch; \
	rm 11678.patch; \
	# https://github.com/php/php-src/pull/19131
	# this backported commit broke our ability to apply 14834, which is the fix we need, so this is applied as a reverse patch to undo it
	# 19131 was for FreeBSD, so doesn't apply to this alpine build
	curl -fL 'https://github.com/php/php-src/commit/a5df26691d1b1f71b964b869510473a5d5413999.patch?full_index=1' -o 19131.patch; \
	echo 'c98c01c74d3a6da197116f8511b16fed361ca6bbb6a8af8df629a933f541c213 *19131.patch' | sha256sum -c -; \
	patch --reverse -p1 < 19131.patch; \
	rm 19131.patch; \
	# https://github.com/php/php-src/issues/14834
	curl -fL 'https://github.com/php/php-src/commit/67259e451d5d58b4842776c5696a66d74e157609.patch?full_index=1' -o 14834.patch; \
	echo 'ed10a1b254091ad676ed204e55628ecbd6c8962004d6185a1821cedecd526c0f *14834.patch' | sha256sum -c -; \
	filterdiff -x '*/NEWS' 14834.patch | patch -p1; \
	rm 14834.patch; \
	gnuArch="$(dpkg-architecture --query DEB_BUILD_GNU_TYPE)"; \
	./configure \
		--build="$gnuArch" \
		--with-config-file-path="$PHP_INI_DIR" \
		--with-config-file-scan-dir="$PHP_INI_DIR/conf.d" \
		\
# make sure invalid --configure-flags are fatal errors instead of just warnings
		--enable-option-checking=fatal \
		\
# https://github.com/docker-library/php/issues/439
		--with-mhash \
		\
# https://github.com/docker-library/php/issues/822
		--with-pic \
		\
# --enable-ftp is included here for compatibility with existing versions. ftp_ssl_connect() needed ftp to be compiled statically before PHP 7.0 (see https://github.com/docker-library/php/issues/236).
		--enable-ftp \
# --enable-mbstring is included here because otherwise there's no way to get pecl to use it properly (see https://github.com/docker-library/php/issues/195)
		--enable-mbstring \
# --enable-mysqlnd is included here because it's harder to compile after the fact than extensions are (since it's a plugin for several extensions, not an extension in itself)
		--enable-mysqlnd \
# https://wiki.php.net/rfc/argon2_password_hash
		--with-password-argon2 \
# https://wiki.php.net/rfc/libsodium
		--with-sodium=shared \
# always build against system sqlite3 (https://github.com/php/php-src/commit/6083a387a81dbbd66d6316a3a12a63f06d5f7109)
		--with-pdo-sqlite=/usr \
		--with-sqlite3=/usr \
		\
		--with-curl \
		--with-iconv=/usr \
		--with-openssl \
		--with-readline \
		--with-zlib \
		\
# https://github.com/docker-library/php/pull/1259
		--enable-phpdbg \
		--enable-phpdbg-readline \
		\
# in PHP 7.4+, the pecl/pear installers are officially deprecated (requiring an explicit "--with-pear")
		--with-pear \
		\
# bundled pcre does not support JIT on riscv64 until 10.41 (php 8.3+)
# https://github.com/PCRE2Project/pcre2/commits/pcre2-10.41/src/sljit/sljitNativeRISCV_64.c
# https://github.com/php/php-src/tree/php-8.3.0/ext/pcre/pcre2lib
		$(test "$gnuArch" = 'riscv64-linux-musl' && echo '--without-pcre-jit') \
	; \
	make -j "$(nproc)"; \
	find -type f -name '*.a' -delete; \
	make install; \
	find \
		/usr/local \
		-type f \
		-perm '/0111' \
		-exec sh -euxc ' \
			strip --strip-all "$@" || : \
		' -- '{}' + \
	; \
	make clean; \
	\
# https://github.com/docker-library/php/issues/692 (copy default example "php.ini" files somewhere easily discoverable)
	cp -v php.ini-* "$PHP_INI_DIR/"; \
	\
	cd /; \
	docker-php-source delete; \
	\
	runDeps="$( \
		scanelf --needed --nobanner --format '%n#p' --recursive /usr/local \
			| tr ',' '\n' \
			| sort -u \
			| awk 'system("[ -e /usr/local/lib/" $1 " ]") == 0 { next } { print "so:" $1 }' \
	)"; \
	apk add --no-cache $runDeps; \
	\
	apk del --no-network .build-deps; \
	\
# update pecl channel definitions https://github.com/docker-library/php/issues/443
	pecl update-channels; \
	rm -rf /tmp/pear ~/.pearrc; \
	\
# smoke test
	php --version

# chialab: from the source commit.
ADD --chmod=755 \
	$DOCKER_PHP_SCRIPTS/docker-php-ext-configure \
	$DOCKER_PHP_SCRIPTS/docker-php-ext-enable \
	$DOCKER_PHP_SCRIPTS/docker-php-ext-install \
	$DOCKER_PHP_SCRIPTS/docker-php-entrypoint \
	/usr/local/bin/

# enable OPcache by default (https://wiki.php.net/rfc/make_opcache_required)
RUN docker-php-ext-enable opcache

# sodium was built as a shared module (so that it can be replaced later if so desired), so let's enable it too (https://github.com/docker-library/php/issues/598)
RUN docker-php-ext-enable sodium

ENTRYPOINT ["docker-php-entrypoint"]
CMD ["php", "-a"]