# Copyright 1999-2022 Gentoo Authors
# Distributed under the terms of the GNU General Public License v2

EAPI=8

inherit pax-utils python-utils-r1

PYPY_PV=${PV%_p*}
MY_P=pypy2.7-v${PYPY_PV/_}
PATCHSET="pypy2.7-gentoo-patches-${PV/_rc/rc}"

DESCRIPTION="A fast, compliant alternative implementation of the Python language"
HOMEPAGE="https://www.pypy.org/"
SRC_URI="
	https://buildbot.pypy.org/pypy/${MY_P}-src.tar.bz2
	https://dev.gentoo.org/~mgorny/dist/python/${PATCHSET}.tar.xz
"
S="${WORKDIR}/${MY_P}-src"

LICENSE="MIT"
# pypy -c 'import sysconfig; print sysconfig.get_config_var("SOABI")'
SLOT="0/73"
KEYWORDS="~amd64 ~arm64 ~ppc64 ~x86 ~amd64-linux ~x86-linux"
IUSE="bzip2 full-stdlib gdbm +jit ncurses sqlite tk"
RESTRICT="!full-stdlib? ( test )"

RDEPEND="
	|| (
		>=dev-python/pypy-exe-${PYPY_PV}:${PYPY_PV}[bzip2?,ncurses?]
		>=dev-python/pypy-exe-bin-${PYPY_PV}:${PYPY_PV}
	)
	dev-libs/openssl:0=
	gdbm? ( sys-libs/gdbm:0= )
	sqlite? ( dev-db/sqlite:3= )
	tk? (
		dev-lang/tk:0=
		dev-tcltk/tix:0=
	)
	!<dev-python/pypy-bin-7.3.0:0
"
DEPEND="
	${RDEPEND}
"

src_prepare() {
	local PATCHES=(
		"${WORKDIR}/${PATCHSET}"
	)
	default
}

src_compile() {
	# copy over to make sys.prefix happy
	cp -p "${BROOT}"/usr/lib/pypy2.7/pypy-c-${PYPY_PV} pypy-c || die
	cp -p "${BROOT}"/usr/lib/pypy2.7/include/${PYPY_PV}/* include/ || die
	# (not installed by pypy)
	rm pypy/module/cpyext/include/_numpypy/numpy/README || die
	mv pypy/module/cpyext/include/* include/ || die
	mv pypy/module/cpyext/parse/*.h include/ || die
	pax-mark m pypy-c

	# verify the subslot
	local soabi=$(
		./pypy-c - <<-EOF
			import sysconfig
			print sysconfig.get_config_var("SOABI")
		EOF
	)
	[[ ${soabi#pypy-} == ${SLOT#*/} ]] || die "update subslot to ${soabi}"

	einfo "Generating caches and CFFI modules ..."

	if use full-stdlib; then
		# Generate Grammar and PatternGrammar pickles.
		./pypy-c - <<-EOF || die "Generation of Grammar and PatternGrammar pickles failed"
			import lib2to3.pygram
			import lib2to3.patcomp
			lib2to3.patcomp.PatternCompiler()
		EOF

		# Generate cffi modules
		# Please keep in sync with pypy/tool/build_cffi_imports.py!
		cffi_targets=( pypy_util ssl audioop syslog pwdgrp resource )
		use gdbm && cffi_targets+=( gdbm )
		use ncurses && cffi_targets+=( curses )
		use sqlite && cffi_targets+=( sqlite3 )
		use tk && cffi_targets+=( tkinter/tklib )

		local t
		# all modules except tkinter output to .
		# tkinter outputs to the correct dir ...
		cd lib_pypy || die
		for t in "${cffi_targets[@]}"; do
			# tkinter doesn't work via -m
			../pypy-c "_${t}_build.py" || die "Failed to build CFFI bindings for ${t}"
		done

		# Verify that CFFI module list is up-to-date
		local expected_cksum=2d3acf18
		local local_cksum=$(
			../pypy-c - <<-EOF
				import binascii
				import json
				from pypy_tools.build_cffi_imports import cffi_build_scripts as x
				print("%08x" % (binascii.crc32(json.dumps(x)),))
			EOF
		)
		if [[ ${local_cksum} != ${expected_cksum} ]]; then
			die "Please verify cffi_targets and update checksum to ${local_cksum}"
		fi

		# Cleanup temporary objects
		find -name "_cffi_*.[co]" -delete || die
		find -type d -empty -delete || die
	fi
}

src_test() {
	# (unset)
	local -x PYTHONDONTWRITEBYTECODE=
	local -x COLUMNS=80

	local ignored_tests=(
		# network
		--ignore=lib-python/2.7/test/test_urllibnet.py
		--ignore=lib-python/2.7/test/test_urllib2net.py
		# lots of free space
		--ignore=lib-python/2.7/test/test_zipfile64.py

		# broken by expat-2.4.5
		--ignore=lib-python/2.7/test/test_minidom.py
		--ignore=lib-python/2.7/test/test_xml_etree.py
		--ignore=lib-python/2.7/test/test_xml_etree_c.py
	)

	./pypy-c ./pypy/test_all.py --pypy=./pypy-c -vv \
		"${ignored_tests[@]}" lib-python || die
}

src_install() {
	local dest=/usr/lib/pypy2.7
	einfo "Installing PyPy ..."
	dosym pypy-c-${PYPY_PV} "${dest}/pypy-c"
	insinto "${dest}"
	# preserve mtimes to avoid obsoleting caches
	insopts -p
	if use full-stdlib; then
		doins -r include lib_pypy lib-python

		# replace copied headers with symlinks
		for x in "${BROOT}"/usr/lib/pypy2.7/include/${PYPY_PV}/*; do
			dosym "${PYPY_PV}/${x##*/}" "${dest}/include/${x##*/}"
		done

		if ! use gdbm; then
			rm -r "${ED}${dest}"/lib_pypy/gdbm.py \
				"${ED}${dest}"/lib-python/*2.7/test/test_gdbm.py || die
		fi
		if ! use sqlite; then
			rm -r "${ED}${dest}"/lib-python/*2.7/sqlite3 \
				"${ED}${dest}"/lib_pypy/_sqlite3.py \
				"${ED}${dest}"/lib-python/*2.7/test/test_sqlite.py || die
		fi
		if ! use tk; then
			rm -r "${ED}${dest}"/lib-python/*2.7/{idlelib,lib-tk} \
				"${ED}${dest}"/lib_pypy/_tkinter \
				"${ED}${dest}"/lib-python/*2.7/test/test_{tcl,tk,ttk*}.py || die
		fi
	else
		# install only the absolutely minimal subset of modules needed
		# for pypy3 build
		local lib_py_modules=(
			# base modules needed to even start pypy (and import site)
			codecs.py
			copy_reg.py
			encodings
			genericpath.py
			linecache.py
			os.py
			pkgutil.py
			posixpath.py
			re.py
			runpy.py
			site.py
			sre_compile.py
			sre_constants.py
			sre_parse.py
			stat.py
			string.py
			sysconfig.py
			traceback.py
			warnings.py
			UserDict.py

			# needed for python_optimize
			compileall.py
			getopt.py
			py_compile.py
			struct.py

			# needed for rpython
			argparse.py
			atexit.py
			base64.py
			bdb.py
			bisect.py
			cmd.py
			code.py
			codeop.py
			collections.py
			colorsys.py
			contextlib.py
			copy.py
			ctypes
			dis.py
			fnmatch.py
			functools.py
			gettext.py
			hashlib.py
			heapq.py
			inspect.py
			io.py
			json
			keyword.py
			locale.py
			logging
			new.py
			opcode.py
			optparse.py
			pdb.py
			pickle.py
			platform.py
			pprint.py
			random.py
			repr.py
			shlex.py
			shutil.py
			StringIO.py
			subprocess.py
			tempfile.py
			textwrap.py
			threading.py
			tokenize.py
			weakref.py
			zipfile.py
		)

		local distutils_modules=(
			# needed by site
			__init__.py
			errors.py
			sysconfig.py
			sysconfig_cpython.py
			sysconfig_pypy.py
		)

		local lib_pypy_modules=(
			# needed by site
			_sysconfigdata.py

			# needed by rpython
			cffi
			_ctypes
			_ffi.py
			_functools.py
			_sha.py
			_sha256.py
			_sha512.py

			# NB: we're deliberately skipping _hashlib to avoid some deps
		)

		cd lib-python/2.7 || die
		insinto "${dest}/lib-python/2.7"
		doins -r "${lib_py_modules[@]}"
		cd - >/dev/null || die

		cd lib-python/2.7/distutils || die
		insinto "${dest}/lib-python/2.7/distutils"
		doins -r "${distutils_modules[@]}"
		cd - >/dev/null || die

		cd lib_pypy || die
		insinto "${dest}/lib_pypy"
		doins -r "${lib_pypy_modules[@]}"
		cd - >/dev/null || die
	fi

	dosym ../lib/pypy2.7/pypy-c /usr/bin/pypy
	dodoc README.rst

	local -x EPYTHON=pypy
	local -x PYTHON=${ED}${dest}/pypy-c-${PYPY_PV}
	# temporarily copy to build tree to facilitate module builds
	cp -p "${BROOT}${dest}/pypy-c-${PYPY_PV}" "${PYTHON}" || die

	einfo "Byte-compiling Python standard library..."
	python_optimize "${ED}${dest}"

	# remove to avoid collisions
	rm "${PYTHON}" || die
}