{{
	def is_alpine:
		env.variant | startswith("alpine")
	;
	def is_slim:
		env.variant | startswith("slim-")
	;
	def rcVersion:
		env.version | rtrimstr("-rc")
-}}
{{ if is_alpine then ( -}}
FROM alpine:{{ env.variant | ltrimstr("alpine") }}
{{ ) elif is_slim then ( -}}
FROM debian:{{ env.variant | ltrimstr("slim-") }}-slim
{{ ) else ( -}}
FROM buildpack-deps:{{ env.variant }}
{{ ) end -}}

# ensure local python is preferred over distribution python
ENV PATH /usr/local/bin:$PATH

# http://bugs.python.org/issue19846
# > At the moment, setting "LANG=C" on a Linux system *fundamentally breaks Python 3*, and that's not OK.
ENV LANG C.UTF-8

# runtime dependencies
{{ if is_alpine then ( -}}
RUN set -eux; \
	apk add --no-cache \
		ca-certificates \
		tzdata \
	;
{{ ) else ( -}}
RUN set -eux; \
	apt-get update; \
	apt-get install -y --no-install-recommends \
{{ if is_slim then ( -}}
		ca-certificates \
		netbase \
		tzdata \
{{ ) else ( -}}
		libbluetooth-dev \
		tk-dev \
		uuid-dev \
{{ ) end -}}
	; \
	rm -rf /var/lib/apt/lists/*
{{ ) end -}}

ENV GPG_KEY {{
	{
		# gpg: key AA65421D: public key "Ned Deily (Python release signing key) <nad@acm.org>" imported
		"3.7": "0D96DF4D4110E5C43FBFB17F2D347EA6AA65421D",
		# https://www.python.org/dev/peps/pep-0537/#release-manager-and-crew

		# gpg: key B26995E310250568: public key "\xc5\x81ukasz Langa (GPG langa.pl) <lukasz@langa.pl>" imported
		"3.8": "E3FF2839C048B25C084DEBE9B26995E310250568",
		# https://www.python.org/dev/peps/pep-0569/#release-manager-and-crew

		# gpg: key B26995E310250568: public key "\xc5\x81ukasz Langa (GPG langa.pl) <lukasz@langa.pl>" imported
		"3.9": "E3FF2839C048B25C084DEBE9B26995E310250568",
		# https://www.python.org/dev/peps/pep-0596/#release-manager-and-crew

		# gpg: key 64E628F8D684696D: public key "Pablo Galindo Salgado <pablogsal@gmail.com>" imported
		"3.10": "A035C8C19219BA821ECEA86B64E628F8D684696D",
		# https://www.python.org/dev/peps/pep-0619/#release-manager-and-crew

		# gpg: key 64E628F8D684696D: public key "Pablo Galindo Salgado <pablogsal@gmail.com>" imported
		"3.11": "A035C8C19219BA821ECEA86B64E628F8D684696D",
		# https://www.python.org/dev/peps/pep-0664/#release-manager-and-crew

		# gpg: key A821E680E5FA6305: public key "Thomas Wouters <thomas@python.org>" imported
		"3.12": "7169605F62C751356D054A26A821E680E5FA6305",
		# https://www.python.org/dev/peps/pep-0693/#release-manager-and-crew
	}[rcVersion]
}}
ENV PYTHON_VERSION {{ .version }}

RUN set -eux; \
	\
{{ if is_alpine then ( -}}
	apk add --no-cache --virtual .build-deps \
		gnupg \
		tar \
		xz \
		\
		bluez-dev \
		bzip2-dev \
		dpkg-dev dpkg \
		expat-dev \
		findutils \
		gcc \
		gdbm-dev \
		libc-dev \
		libffi-dev \
		libnsl-dev \
		libtirpc-dev \
		linux-headers \
		make \
		ncurses-dev \
		openssl-dev \
		pax-utils \
		readline-dev \
		sqlite-dev \
		tcl-dev \
		tk \
		tk-dev \
		util-linux-dev \
		xz-dev \
		zlib-dev \
	; \
	\
{{ ) elif is_slim then ( -}}
	savedAptMark="$(apt-mark showmanual)"; \
	apt-get update; \
	apt-get install -y --no-install-recommends \
		dpkg-dev \
		gcc \
		gnupg \
		libbluetooth-dev \
		libbz2-dev \
		libc6-dev \
		libdb-dev \
		libexpat1-dev \
		libffi-dev \
		libgdbm-dev \
		liblzma-dev \
		libncursesw5-dev \
		libreadline-dev \
		libsqlite3-dev \
		libssl-dev \
		make \
		tk-dev \
		uuid-dev \
		wget \
		xz-utils \
		zlib1g-dev \
	; \
	\
{{ ) else "" end -}}
	wget -O python.tar.xz "https://www.python.org/ftp/python/${PYTHON_VERSION%%[a-z]*}/Python-$PYTHON_VERSION.tar.xz"; \
	wget -O python.tar.xz.asc "https://www.python.org/ftp/python/${PYTHON_VERSION%%[a-z]*}/Python-$PYTHON_VERSION.tar.xz.asc"; \
	GNUPGHOME="$(mktemp -d)"; export GNUPGHOME; \
	gpg --batch --keyserver hkps://keys.openpgp.org --recv-keys "$GPG_KEY"; \
	gpg --batch --verify python.tar.xz.asc python.tar.xz; \
	gpgconf --kill all; \
	rm -rf "$GNUPGHOME" python.tar.xz.asc; \
	mkdir -p /usr/src/python; \
	tar --extract --directory /usr/src/python --strip-components=1 --file python.tar.xz; \
	rm python.tar.xz; \
	\
	cd /usr/src/python; \
	gnuArch="$(dpkg-architecture --query DEB_BUILD_GNU_TYPE)"; \
	./configure \
		--build="$gnuArch" \
		--enable-loadable-sqlite-extensions \
		--enable-optimizations \
		--enable-option-checking=fatal \
		--enable-shared \
{{
	# <3.10 does not have -fno-semantic-interposition enabled and --with-lto does nothing for performance
	if [ "3.7", "3.8", "3.9" ] | index(rcVersion) then "" else (
-}}
		--with-lto \
{{ ) end -}}
		--with-system-expat \
		--without-ensurepip \
	; \
	nproc="$(nproc)"; \
{{ if is_alpine then ( -}}
# set thread stack size to 1MB so we don't segfault before we hit sys.getrecursionlimit()
# https://github.com/alpinelinux/aports/commit/2026e1259422d4e0cf92391ca2d3844356c649d0
	EXTRA_CFLAGS="-DTHREAD_STACK_SIZE=0x100000"; \
{{ ) else ( -}}
	EXTRA_CFLAGS="$(dpkg-buildflags --get CFLAGS)"; \
	LDFLAGS="$(dpkg-buildflags --get LDFLAGS)"; \
{{ ) end -}}
{{ if is_slim or is_alpine then ( -}}
	LDFLAGS="${LDFLAGS:--Wl},--strip-all"; \
{{ ) else "" end -}}
{{ if env.version == "3.7" then ( -}}
# setting PROFILE_TASK makes "--enable-optimizations" reasonable: https://bugs.python.org/issue36044 / https://github.com/docker-library/python/issues/160#issuecomment-509426916
	PROFILE_TASK='-m test.regrtest --pgo \
		test_array \
		test_base64 \
		test_binascii \
		test_binhex \
		test_binop \
		test_bytes \
		test_c_locale_coercion \
		test_class \
		test_cmath \
		test_codecs \
		test_compile \
		test_complex \
		test_csv \
		test_decimal \
		test_dict \
		test_float \
		test_fstring \
		test_hashlib \
		test_io \
		test_iter \
		test_json \
		test_long \
		test_math \
		test_memoryview \
		test_pickle \
		test_re \
		test_set \
		test_slice \
		test_struct \
		test_threading \
		test_time \
		test_traceback \
		test_unicode \
	'; \
{{
) else
	# PROFILE_TASK has a reasonable default starting in 3.8+; see:
	#   https://bugs.python.org/issue36044
	#   https://github.com/python/cpython/pull/14702
	#   https://github.com/python/cpython/pull/14910
	""
end
-}}
	make -j "$nproc" \
		"EXTRA_CFLAGS=${EXTRA_CFLAGS:-}" \
		"LDFLAGS=${LDFLAGS:-}" \
		"PROFILE_TASK=${PROFILE_TASK:-}" \
	; \
# https://github.com/docker-library/python/issues/784
# prevent accidental usage of a system installed libpython of the same version
	rm python; \
	make -j "$nproc" \
		"EXTRA_CFLAGS=${EXTRA_CFLAGS:-}" \
		"LDFLAGS=${LDFLAGS:--Wl},-rpath='\$\$ORIGIN/../lib'" \
		"PROFILE_TASK=${PROFILE_TASK:-}" \
		python \
	; \
	make install; \
{{ if is_alpine or is_slim then "" else ( -}}
	\
# enable GDB to load debugging data: https://github.com/docker-library/python/pull/701
	bin="$(readlink -ve /usr/local/bin/python3)"; \
	dir="$(dirname "$bin")"; \
	mkdir -p "/usr/share/gdb/auto-load/$dir"; \
	cp -vL Tools/gdb/libpython.py "/usr/share/gdb/auto-load/$bin-gdb.py"; \
{{ ) end -}}
	\
	cd /; \
	rm -rf /usr/src/python; \
	\
	find /usr/local -depth \
		\( \
			\( -type d -a \( -name test -o -name tests -o -name idle_test \) \) \
			-o \( -type f -a \( -name '*.pyc' -o -name '*.pyo' -o -name 'libpython*.a' \) \) \
{{ if [ "3.7", "3.8" ] | index(env.version) then ( -}}
			-o \( -type f -a -name 'wininst-*.exe' \) \
{{
	) else
		# "wininst-*.exe" is not installed for Unix platforms on Python 3.9+: https://github.com/python/cpython/pull/14511
		""
	end
-}}
		\) -exec rm -rf '{}' + \
	; \
	\
{{ if is_alpine then ( -}}
	find /usr/local -type f -executable -not \( -name '*tkinter*' \) -exec scanelf --needed --nobanner --format '%n#p' '{}' ';' \
		| tr ',' '\n' \
		| sort -u \
		| awk 'system("[ -e /usr/local/lib/" $1 " ]") == 0 { next } { print "so:" $1 }' \
		| xargs -rt apk add --no-network --virtual .python-rundeps \
	; \
	apk del --no-network .build-deps; \
{{ ) else ( -}}
	ldconfig; \
{{ if is_slim then ( -}}
	\
	apt-mark auto '.*' > /dev/null; \
	apt-mark manual $savedAptMark; \
	find /usr/local -type f -executable -not \( -name '*tkinter*' \) -exec ldd '{}' ';' \
		| awk '/=>/ { so = $(NF-1); if (index(so, "/usr/local/") == 1) { next }; gsub("^/(usr/)?", "", so); printf "*%s\n", so }' \
		| sort -u \
		| xargs -r dpkg-query --search \
		| cut -d: -f1 \
		| sort -u \
		| xargs -r apt-mark manual \
	; \
	apt-get purge -y --auto-remove -o APT::AutoRemove::RecommendsImportant=false; \
	rm -rf /var/lib/apt/lists/*; \
{{ ) else "" end -}}
{{ ) end -}}
	\
	python3 --version

# make some useful symlinks that are expected to exist ("/usr/local/bin/python" and friends)
RUN set -eux; \
	for src in idle3 pydoc3 python3 python3-config; do \
		dst="$(echo "$src" | tr -d 3)"; \
		[ -s "/usr/local/bin/$src" ]; \
		[ ! -e "/usr/local/bin/$dst" ]; \
		ln -svT "$src" "/usr/local/bin/$dst"; \
	done

# if this is called "PIP_VERSION", pip explodes with "ValueError: invalid truth value '<VERSION>'"
ENV PYTHON_PIP_VERSION {{ .pip.version }}
{{ if .setuptools then ( -}}
# https://github.com/docker-library/python/issues/365
ENV PYTHON_SETUPTOOLS_VERSION {{ .setuptools.version }}
{{ ) else "" end -}}
# https://github.com/pypa/get-pip
ENV PYTHON_GET_PIP_URL {{ ."get-pip".url }}
ENV PYTHON_GET_PIP_SHA256 {{ ."get-pip".sha256 }}

RUN set -eux; \
	\
{{ if is_slim then ( -}}
	savedAptMark="$(apt-mark showmanual)"; \
	apt-get update; \
	apt-get install -y --no-install-recommends wget; \
	\
{{ ) else "" end -}}
	wget -O get-pip.py "$PYTHON_GET_PIP_URL"; \
	echo "$PYTHON_GET_PIP_SHA256 *get-pip.py" | sha256sum -c -; \
	\
{{ if is_slim then ( -}}
	apt-mark auto '.*' > /dev/null; \
	[ -z "$savedAptMark" ] || apt-mark manual $savedAptMark > /dev/null; \
	apt-get purge -y --auto-remove -o APT::AutoRemove::RecommendsImportant=false; \
	rm -rf /var/lib/apt/lists/*; \
	\
{{ ) else "" end -}}
	export PYTHONDONTWRITEBYTECODE=1; \
	\
	python get-pip.py \
		--disable-pip-version-check \
		--no-cache-dir \
		--no-compile \
		"pip==$PYTHON_PIP_VERSION" \
{{ if .setuptools then ( -}}
		"setuptools==$PYTHON_SETUPTOOLS_VERSION" \
{{ ) else "" end -}}
	; \
	rm -f get-pip.py; \
	\
	pip --version

CMD ["python3"]