qt5-build.eclass: introduce QT5_GENTOO_PRIVATE_CONFIG

This behaves similarly to QT5_GENTOO_CONFIG, but for the new qmodule.pri instead.

Bug: https://bugs.gentoo.org/634622

eclass/qt5-build.eclass

@@ -42,6 +42,14 @@ esac
 # definitions, which are then merged together with all other Qt5 packages
 # installed on the system to obtain the global qconfig.{h,pri} files.
 
+# @ECLASS-VARIABLE: QT5_GENTOO_PRIVATE_CONFIG
+# @DEFAULT_UNSET
+# @DESCRIPTION:
+# Array of <useflag:feature> pairs that are evaluated in src_install
+# to generate the per-package list of enabled QT.global_private features,
+# which are then merged together with all other Qt5 packages installed on the
+# system to obtain the global qmodule.pri file.
+
 # @ECLASS-VARIABLE: VIRTUALX_REQUIRED
 # @DESCRIPTION:
 # For proper description see virtualx.eclass man page.
@@ -319,23 +327,23 @@ qt5-build_src_install() {
 		dosym qt5-"${CHOST}".conf /etc/xdg/qtchooser/qt5.conf
 	fi
 
-	qt5_install_module_qconfigs
+	qt5_install_module_config
 	prune_libtool_files
 }
 
 # @FUNCTION: qt5-build_pkg_postinst
 # @DESCRIPTION:
 # Regenerate configuration after installation or upgrade/downgrade.
 qt5-build_pkg_postinst() {
-	qt5_regenerate_global_qconfigs
+	qt5_regenerate_global_configs
 }
 
 # @FUNCTION: qt5-build_pkg_postrm
 # @DESCRIPTION:
 # Regenerate configuration when a module is completely removed.
 qt5-build_pkg_postrm() {
 	if [[ -z ${REPLACED_BY_VERSION} && ${PN} != qtcore ]]; then
-		qt5_regenerate_global_qconfigs
+		qt5_regenerate_global_configs
 	fi
 }
 
@@ -675,6 +683,9 @@ qt5_base_configure() {
 		# do not build with -Werror
 		-no-warnings-are-errors
 
+		# enable in respective modules to avoid poisoning QT.global_private.enabled_features
+		$([[ ${QT5_MINOR_VERSION} -ge 9 ]] && echo -no-gui -no-widgets)
+
 		# module-specific options
 		"${myconf[@]}"
 	)
@@ -762,15 +773,17 @@ qt5_qmake() {
 		|| die "qmake failed (${projectdir#${S}/})"
 }
 
-# @FUNCTION: qt5_install_module_qconfigs
+# @FUNCTION: qt5_install_module_config
 # @INTERNAL
 # @DESCRIPTION:
-# Creates and installs gentoo-specific ${PN}-qconfig.{h,pri} files.
-qt5_install_module_qconfigs() {
-	local x qconfig_add= qconfig_remove=
+# Creates and installs gentoo-specific ${PN}-qconfig.{h,pri} and
+# ${PN}-qmodule.pri files.
+qt5_install_module_config() {
+	local x qconfig_add= qconfig_remove= qprivateconfig_add= qprivateconfig_remove=
 
 	> "${T}"/${PN}-qconfig.h
 	> "${T}"/${PN}-qconfig.pri
+	[[ ${QT5_MINOR_VERSION} -ge 9 ]] && > "${T}"/${PN}-qmodule.pri
 
 	# generate qconfig_{add,remove} and ${PN}-qconfig.h
 	for x in "${QT5_GENTOO_CONFIG[@]}"; do
@@ -804,19 +817,45 @@ qt5_install_module_qconfigs() {
 		doins "${T}"/${PN}-qconfig.pri
 	)
 
+	if [[ ${QT5_MINOR_VERSION} -ge 9 ]]; then
+		# generate qprivateconfig
+		for x in "${QT5_GENTOO_PRIVATE_CONFIG[@]}"; do
+			local flag=${x%%:*}
+			x=${x#${flag}:}
+			local feature=${x%%:*}
+			x=${x#${feature}:}
+
+			if [[ -z ${flag} ]] || { [[ ${flag} != '!' ]] && use ${flag}; }; then
+				[[ -n ${feature} ]] && qprivateconfig_add+=" ${feature}"
+			else
+				[[ -n ${feature} ]] && qprivateconfig_remove+=" ${feature}"
+			fi
+		done
+
+		# generate and install ${PN}-qmodule.pri
+		[[ -n ${qprivateconfig_add} ]] && echo "QT.global_private.enabled_features = ${qprivateconfig_add}" >> "${T}"/${PN}-qmodule.pri
+		[[ -n ${qprivateconfig_remove} ]] && echo "QT.global_private.disabled_features = ${qprivateconfig_remove}" >> "${T}"/${PN}-qmodule.pri
+		[[ -s ${T}/${PN}-qmodule.pri ]] && (
+			insinto "${QT5_ARCHDATADIR#${EPREFIX}}"/mkspecs/gentoo
+			doins "${T}"/${PN}-qmodule.pri
+		)
+	fi
+
 	# install also the original qconfig.pri
 	[[ ${PN} == qtcore && ${QT5_MINOR_VERSION} -ge 9 ]] && (
 		insinto "${QT5_ARCHDATADIR#${EPREFIX}}"/mkspecs/gentoo
 		newins "${D}${QT5_ARCHDATADIR#${EPREFIX}}"/mkspecs/qconfig.pri qconfig-qtcore.pri
+		newins "${D}${QT5_ARCHDATADIR#${EPREFIX}}"/mkspecs/qmodule.pri qmodule-qtcore.pri
 	)
 }
 
-# @FUNCTION: qt5_regenerate_global_qconfigs
+# @FUNCTION: qt5_regenerate_global_configs
 # @INTERNAL
 # @DESCRIPTION:
-# Generates Gentoo-specific qconfig.{h,pri} according to the build configuration.
+# Generates Gentoo-specific qconfig.{h,pri} and qmodule.pri according to the
+# build configuration.
 # Don't call die here because dying in pkg_post{inst,rm} only makes things worse.
-qt5_regenerate_global_qconfigs() {
+qt5_regenerate_global_configs() {
 	einfo "Regenerating gentoo-qconfig.h"
 
 	find "${ROOT%/}${QT5_HEADERDIR}"/Gentoo \
@@ -860,4 +899,61 @@ qt5_regenerate_global_qconfigs() {
 	else
 		ewarn "${qconfig_pri} does not exist or is not a regular file"
 	fi
+
+	if [[ ${QT5_MINOR_VERSION} -ge 9 ]]; then
+		einfo "Updating QT.global_private in qmodule.pri"
+
+		local qmodule_pri=${ROOT%/}${QT5_ARCHDATADIR}/mkspecs/qmodule.pri
+		local qmodule_pri_orig=${ROOT%/}${QT5_ARCHDATADIR}/mkspecs/gentoo/qmodule-qtcore.pri
+		if [[ -f ${qmodule_pri} && -f ${qmodule_pri_orig} ]]; then
+			local x
+			local qprivateconfig_enabled= qprivateconfig_disabled=
+			local qprivateconfig_orig_enabled= qprivateconfig_orig_disabled=
+			local new_qprivateconfig_enabled= new_qprivateconfig_disabled=
+
+			# generate lists of QT.global_private.{dis,en}abled_features
+			qprivateconfig_orig_enabled="$(sed -n 's/^QT.global_private.enabled_features\s=\s*//p' "${qmodule_pri_orig}")"
+			qprivateconfig_orig_disabled="$(sed -n 's/^QT.global_private.disabled_features\s=\s*//p' "${qmodule_pri_orig}")"
+			eshopts_push -s nullglob
+			for x in "${ROOT%/}${QT5_ARCHDATADIR}"/mkspecs/gentoo/*-qmodule.pri; do
+				qprivateconfig_enabled+=" $(sed -n 's/^QT.global_private.enabled_features\s=\s*//p' "${x}")"
+				qprivateconfig_disabled+=" $(sed -n 's/^QT.global_private.disabled_features\s=\s*//p' "${x}")"
+			done
+			eshopts_pop
+
+			# anything enabled is enabled, but anything disabled is
+			# only disabled if it isn't enabled somewhere else.
+			# this is because we need to forcibly disable some stuff
+			# in qtcore to support split qtbase.
+			new_qprivateconfig_enabled=${qprivateconfig_enabled}
+			for x in ${qprivateconfig_disabled}; do
+				if ! has "${x}" ${qprivateconfig_enabled}; then
+					new_qprivateconfig_disabled+=" ${x}"
+				fi
+			done
+
+			# check all items from the original qtcore qmodule.pri,
+			# and add them to the appropriate list if not overriden
+			# elsewhere
+			for x in ${qprivateconfig_orig_enabled}; do
+				if ! has "${x}" ${new_qprivateconfig_enabled} ${new_qprivateconfig_disabled}; then
+					new_qprivateconfig_enabled+=" ${x}"
+				fi
+			done
+			for x in ${qprivateconfig_orig_disabled}; do
+				if ! has "${x}" ${new_qprivateconfig_enabled} ${new_qprivateconfig_disabled}; then
+					new_qprivateconfig_disabled+=" ${x}"
+				fi
+			done
+
+			# now replace the existing QT.global_private.{dis,en}abled_features
+			# with the generated list
+			sed \
+				-e "s/^QT.global_private.enabled_features\s*=.*/QT.global_private.enabled_features =${new_qprivateconfig_enabled}/" \
+				-e "s/^QT.global_private.disabled_features\s*=.*/QT.global_private.disabled_features =${new_qprivateconfig_disabled}/" \
+				-i "${qmodule_pri}" || eerror "Failed to sed QT.global_private.enabled_features in ${qmodule_pri}"
+		else
+			ewarn "${qmodule_pri} or ${qmodule_pri_orig} does not exist or is not a regular file"
+		fi
+	fi
 }