Add electron eselect and update electron-bin meta a bit to produce cleaner install

app-eselect/eselect-electron/eselect-electron-2.2.ebuild

@@ -0,0 +1,23 @@
+# Copyright 2019 rexy712
+# Distributed under the terms of the GNU General Public License v3
+
+EAPI=7
+
+DESCRIPTION="Manages versions of electron executables"
+HOMEPAGE="https://www.gentoo.org/"
+SRC_URI=""
+
+LICENSE="GPL-3"
+SLOT="0"
+KEYWORDS="~amd64"
+IUSE=""
+
+DEPEND="app-admin/eselect"
+RDEPEND=""
+
+S="${FILESDIR}"
+
+src_install() {
+	insinto /usr/share/eselect/modules
+	newins "${FILESDIR}"/electron-${PV}.eselect electron.eselect
+}

app-eselect/eselect-electron/files/electron-2.2.eselect

@@ -0,0 +1,80 @@
+inherit config
+
+DESCRIPTION="Manage electron versions"
+MAINTAINER="rexerton.rexy@tutamail.com"
+VERSION="2.2"
+
+USR_PATH="${EROOT%/}/usr"
+
+active_slot() {
+	if [ -h "${USR_PATH}/bin/electron" ];then
+		readlink "${USR_PATH}/bin/electron" | xargs basename
+	else
+		echo "(none)"
+	fi
+}
+get_slots() {
+	local found_slots=()
+	for slot in $(find "${USR_PATH}/bin" -mindepth 1 -maxdepth 1 \( -type f -o -type l \) -regex "${USR_PATH}"'/bin/electron\(-bin\)?-[1-9][0-9.]+\(-r[1-9]+\)?$');do
+		[ -x "${slot}" ] && found_slots+=( "${slot##*/}" )
+	done
+	echo ${found_slots[@]}
+}
+
+describe_list() {
+	echo "List available electron slots"
+}
+
+do_list() {
+	write_list_start "Available electron slots"
+	if $(is_output_mode brief);then
+		echo $(get_slots)
+	else
+		i=1
+		for slot in $(get_slots);do
+			case "${slot}" in
+				"$(active_slot)" )
+					write_kv_list_entry "$i) $(highlight_marker ${slot})";;
+				*)
+					write_kv_list_entry "$i) ${slot}";;
+			esac
+			i=$((i+1))
+		done
+		[ -z "$(get_slots)" ] && write_warning_msg "No slots available."
+	fi
+}
+
+describe_show() {
+	echo "Get active slot"
+}
+
+do_show() {
+	echo "$(active_slot)"
+}
+
+describe_set() {
+	echo "Set the symlink for the electron application"
+}
+
+do_set() {
+	local selected="$1"
+	if [ -e "${USR_PATH}/bin/${selected}" ] && [[ "${selected}" =~ ^electron(-bin)?-[1-9][0-9.]+(-r[1-9]+)? ]];then
+		ln -sf "${USR_PATH}/bin/${selected}" "${USR_PATH}/bin/electron" || die
+		return
+	elif [[ "${selected}" =~ ^[1-9][0-9]*$ ]];then
+		slots=( $(get_slots) )
+		if [ "${selected}" -le ${#slots[@]} ];then
+			ln -sf "${USR_PATH}/bin/${slots[$((selected-1))]}" "${USR_PATH}/bin/electron" || die
+			return
+		fi
+	fi
+
+	die -q "Not a valid slot"
+}
+describe_unset() {
+	echo "Remove electron symlink"
+}
+do_unset() {
+	[ -h "${USR_PATH}/bin/electron" ] && rm /usr/bin/electron
+}
+

dev-util/electron-bin/electron-bin-6.1.2.ebuild

@@ -1,5 +1,5 @@
-# Copyright 1999-2019 Gentoo Authors
-# Distributed under the terms of the GNU General Public License v2
+# Copyright 2019 rexy712
+# Distributed under the terms of the GNU General Public License v3
 
 EAPI=7
 
@@ -50,11 +50,14 @@ RDEPEND="
 	x11-libs/libXtst
 	x11-libs/pango
 "
-DEPEND="app-arch/unzip"
+DEPEND="
+	app-arch/unzip
+	>=app-eselect/eselect-electron-2.2
+"
 
 S="${WORKDIR}"
 
-OPTPATH="opt/${MY_PN}-${VERSION_MAJ}.${VERSION_MIN}"
+OPTPATH="opt/${MY_PN}/${PN}-${VERSION_MAJ}.${VERSION_MIN}"
 QA_PRESTRIPPED="${OPTPATH}/.*"
 
 pkg_setup() {
@@ -74,5 +77,15 @@ src_install() {
 	# Note: intentionally not using "doins" so that we preserve +x bits
 	cp -r ./* "${ED}/${OPTPATH}" || die
 
-	dosym "../../${OPTPATH}/electron" "/usr/bin/electron-${VERSION_MAJ}.${VERSION_MIN}"
+	dosym "../../${OPTPATH}/electron" "/usr/bin/${PN}-${VERSION_MAJ}.${VERSION_MIN}"
+}
+pkg_postinst() {
+	if [ "$(eselect electron show)" == "(none)" ];then
+		eselect electron set "${PN}-${VERSION_MAJ}.${VERSION_MIN}"
+	fi
+}
+pkg_postrm() {
+	if [ "$(eselect electron show)" == "(none)" ];then
+		eselect electron set 1
+	fi
 }