# Copyright 2020 Gentoo Authors
# Distributed under the terms of the GNU General Public License v2

# QA check: verify correctness of DISTUTILS_USE_SETUPTOOLS
# Maintainer: Python project <python@gentoo.org>

distutils_use_setuptools_check() {
	# applicable only to ebuilds inheriting distutils-r1
	[[ ${_DISTUTILS_R1} ]] || return
	# 'manual' means no checking
	[[ ${DISTUTILS_USE_SETUPTOOLS} == manual ]] && return
	# pyproject.toml is verified by using it
	[[ ${DISTUTILS_USE_SETUPTOOLS} == pyproject.toml ]] && return

	local expected=()
	for impl in "${_PYTHON_SUPPORTED_IMPLS[@]}"; do
		local EPYTHON PYTHON
		_python_export "${impl}" EPYTHON PYTHON
		[[ -x ${PYTHON} ]] || continue
		local sitedir=${D}$(python_get_sitedir)
		if [[ -d ${sitedir} ]]; then
			local egg new_expected
			while read -d $'\0' -r egg; do
				if [[ -f ${egg} ]]; then
					# if .egg-info is a file, it's plain distutils
					new_expected=no
				elif grep -q -s -F '[console_scripts]' \
						"${egg}"/entry_points.txt
				then
					# entry_points == we need rdepend
					new_expected=rdepend
				elif [[ -f ${egg}/requires.txt ]] &&
						grep -q -s '^setuptools' \
						<(sed -e '/^\[/,$d' "${egg}"/requires.txt)
				then
					# explicit *unconditional* rdepend in package metadata
					new_expected=rdepend
				else
					new_expected=bdepend
				fi

				if ! has "${new_expected}" "${expected[@]}"; then
					expected+=( "${new_expected[@]}" )
				fi
			done < <(find "${sitedir}" -name '*.egg-info' -print0)
		fi
	done

	# at this point, expected can contain: no bdepend rdepend
	if [[ ${#expected[@]} -gt 1 ]] && has no "${expected[@]}"; then
		# 'no' and '[rb]depend' are mutually exclusive
		eerror "The package seems to have used distutils and setuptools simultaneously."
		eerror "This could mean the package has bad conditions:"
		eerror "https://dev.gentoo.org/~mgorny/python-guide/distutils.html#conditional-distutils-setuptools-use-in-packages"
		eerror "Please report a bug about this and CC python@"
	elif [[ ${#expected[@]} -gt 0 ]]; then
		# bdepend+rdepend=rdepend
		has rdepend "${expected[@]}" && expected=( rdepend )
		# at this point, expected should have exactly one value
		[[ ${#expected[@]} -eq 1 ]] || die "integrity error"

		if [[ ${DISTUTILS_USE_SETUPTOOLS} != ${expected} ]]; then
				local def=
				[[ ${DISTUTILS_USE_SETUPTOOLS} == bdepend ]] && def=' (or unset)'

				eqawarn "DISTUTILS_USE_SETUPTOOLS value is probably incorrect"
				eqawarn "  have:     DISTUTILS_USE_SETUPTOOLS=${DISTUTILS_USE_SETUPTOOLS}${def}"
				eqawarn "  expected: DISTUTILS_USE_SETUPTOOLS=${expected}"
		fi
	fi
}

distutils_use_setuptools_check

: # guarantee successful exit

# vim:ft=ebuild