Add dev-qt from an older version of the gentoo repo

Qt5 has been removed, we restore it since we still use it.

dev-qt/qt-docs/qt-docs-5.15.2_p202011130614.ebuild

@@ -0,0 +1,107 @@
+# Copyright 1999-2024 Gentoo Authors
+# Distributed under the terms of the GNU General Public License v2
+
+EAPI=8
+
+inherit unpacker
+
+PV_FULL=${PV/_p/-0-}
+PV_NODOTS=$(ver_rs 1-3 '' ${PV%_p*})
+BASE_URI="https://download.qt.io/online/qtsdkrepository/linux_x64/desktop/qt5_${PV_NODOTS}_src_doc_examples/qt.qt5.${PV_NODOTS}.doc"
+
+declare -A QT5_DOCS=(
+	[3d]="qt3d"
+	[assistant]="qtassistant"
+	[bluetooth]="qtbluetooth"
+	[concurrent]="qtconcurrent"
+	[dbus]="qtdbus"
+	[declarative]="qtqml qtqmltest qtquick qtquickdialogs qtquickextras"
+	[designer]="qtdesigner qtuitools"
+	[gamepad]="qtgamepad"
+	[graphicaleffects]="qtgraphicaleffects"
+	[gui]="qtgui qtplatformheaders"
+	[help]="qthelp"
+	[imageformats]="qtimageformats"
+	[linguist]="qtlinguist"
+	[location]="qtlocation"
+	[multimedia]="qtmultimedia"
+	[network]="qtnetwork"
+	[opengl]="qtopengl"
+	[positioning]="qtpositioning"
+	[printsupport]="qtprintsupport"
+	[qdoc]="qdoc"
+	[quickcontrols2]="qtquickcontrols"
+	[quickcontrols]="qtquickcontrols1"
+	[scxml]="qtscxml"
+	[sensors]="qtsensors"
+	[serialbus]="qtserialbus"
+	[serialport]="qtserialport"
+	[speech]="qtspeech"
+	[sql]="qtsql"
+	[svg]="qtsvg"
+	[test]="qttestlib"
+	[wayland]="qtwaylandcompositor"
+	[webchannel]="qtwebchannel"
+	[websockets]="qtwebsockets"
+	[webview]="qtwebview"
+	[widgets]="qtwidgets"
+	[x11extras]="qtx11extras"
+	[xml]="qtxml"
+	[xmlpatterns]="qtxmlpatterns"
+)
+
+DESCRIPTION="Qt5 documentation, for use with Qt Creator and other tools"
+HOMEPAGE="https://doc.qt.io/"
+
+LICENSE="FDL-1.3"
+SLOT="5"
+KEYWORDS="amd64 arm arm64 ~hppa ~loong ~ppc ppc64 ~riscv x86"
+
+IUSE="charts datavis +html networkauth +qch script timeline virtualkeyboard webengine"
+REQUIRED_USE="|| ( html qch )"
+
+SRC_URI="
+	${BASE_URI}/${PV_FULL}qmake-documentation.7z
+	${BASE_URI}/${PV_FULL}qtcore-documentation.7z
+	${BASE_URI}/${PV_FULL}qtdoc-documentation.7z
+	charts? ( ${BASE_URI}.qtcharts/${PV_FULL}qtcharts-documentation.7z )
+	datavis? ( ${BASE_URI}.qtdatavis3d/${PV_FULL}qtdatavisualization-documentation.7z )
+	networkauth? ( ${BASE_URI}.qtnetworkauth/${PV_FULL}qtnetworkauth-documentation.7z )
+	script? ( ${BASE_URI}.qtscript/${PV_FULL}qtscript-documentation.7z
+		${BASE_URI}.qtscript/${PV_FULL}qtscripttools-documentation.7z )
+	timeline? ( ${BASE_URI}.qtquicktimeline/${PV_FULL}qtquicktimeline-documentation.7z )
+	virtualkeyboard? ( ${BASE_URI}.qtvirtualkeyboard/${PV_FULL}qtvirtualkeyboard-documentation.7z )
+	webengine? ( ${BASE_URI}.qtwebengine/${PV_FULL}qtwebengine-documentation.7z )
+"
+
+for DOCUSE in ${!QT5_DOCS[@]}; do
+	IUSE+=" +${DOCUSE}"
+	for DOCTAR in ${QT5_DOCS[${DOCUSE}]}; do
+		SRC_URI+=" ${DOCUSE}? ( ${BASE_URI}/${PV_FULL}${DOCTAR}-documentation.7z )"
+	done
+done
+unset DOCTAR DOCUSE
+
+S=${WORKDIR}/Docs/Qt-${PV%_p*}
+
+BDEPEND="
+	$(unpacker_src_uri_depends .7z)
+	media-libs/libpng:0
+"
+
+src_prepare() {
+	default
+
+	# Fix broken png file, bug 679146
+	local png=qtdoc/images/used-in-examples/demos/tweetsearch/content/resources/anonymous.png
+	pngfix -q --out=${png/.png/fixed.png} ${png} # see pngfix help for exit codes
+	[[ $? -gt 15 ]] && die "Failed to fix ${png}"
+	mv -f ${png/.png/fixed.png} ${png} || die
+}
+
+src_install() {
+	# must be the same as QT5_DOCDIR
+	insinto /usr/share/qt5-doc
+	use html && doins -r */
+	use qch && doins *.qch
+}