sys-boot/zfsbootmenu: add 3.1.0

Closes: https://bugs.gentoo.org/970656
Signed-off-by: Ceres <ceres@ceressees.dev>

sys-boot/zfsbootmenu/Manifest

@@ -2,3 +2,4 @@ DIST zfsbootmenu-1.12.0.tar.gz 1688946 BLAKE2B 291dcc813767def653bc4983cb9ff4c5b
 DIST zfsbootmenu-2.2.2.tar.gz 1830178 BLAKE2B e2191e26215214ce2ed803bf0659aea9ba629fcb35acb75e6398731b5edcee4bc2820203844c80998e39fd4c6eb904244fce6a37126038cd816156466976100a SHA512 895491305bf97147252a63a28d378823068e83417146a949d018b49b6e6d3274af434e8047082dad08494f6db44429a9948531321750b88b0eaf282710356914
 DIST zfsbootmenu-2.3.0.tar.gz 1891010 BLAKE2B 2e84204994008c85ba0ad7231fe442bd02cbb45d57b3dfd707b86d1484b155dc8309958cd66d90336897e9841596aa74d6ffa4a969bca0e65679806ac8233e94 SHA512 9b8e2d5ea258a32cd09a9382faaa21beea54f2ed825fa747f10ffe0b9f191c257b023019ec76dc882e649e8ea6fcd8e310632bba6c783228c594e3d0fee2c9c8
 DIST zfsbootmenu-3.0.1.tar.gz 1905474 BLAKE2B 879eb533c333eb95eba7d6d003e3a5ec9446aa7a6443dc28f5c7002c20bfea229601cddb670a24b0638aa94ad14b038822d389488b5028c47484ffc39f7d1633 SHA512 8176ba9325a0d7f06ce9007a2a46cbb1a66f876987ef281f2fac0e0584dfd206ef55211de4af3aa9ae23d64788060119b070c9083e33928a85542efd07c08c95
+DIST zfsbootmenu-3.1.0.tar.gz 1912653 BLAKE2B 37a209dd50ce1da74f4f1d4e20f051cdac121efb71066c944cac43ff3a7d3186e7756c6fe65a393bc50d90cd03f84c7204dd1eb42728fa70dccb1246b5135142 SHA512 79d2134e827e27dbcc170f47b7c8f465f64d70a1bb6ddb2f05553a0515ccdc75e857e5378fd4fb9d61f3b07d3b0be8e163bde755dd09e0f7e599ebf14c575810

sys-boot/zfsbootmenu/zfsbootmenu-3.1.0.ebuild

@@ -0,0 +1,55 @@
+# Copyright 2023-2025 Gentoo Authors
+# Distributed under the terms of the GNU General Public License v2
+
+EAPI=8
+
+inherit prefix
+
+DESCRIPTION="ZFS bootloader for root-on-ZFS systems"
+HOMEPAGE="https://zfsbootmenu.org"
+SRC_URI="https://github.com/zbm-dev/zfsbootmenu/archive/refs/tags/v${PV}.tar.gz -> ${P}.tar.gz"
+
+LICENSE="MIT"
+SLOT="0"
+KEYWORDS="~amd64 ~arm64"
+
+PATCHES=(
+	"${FILESDIR}"/${PN}-stub-location.patch
+)
+
+RDEPEND="
+app-shells/fzf
+dev-lang/perl
+dev-perl/boolean
+dev-perl/Config-IniFiles
+dev-perl/Sort-Versions
+dev-perl/YAML-PP
+sys-apps/kexec-tools
+sys-block/mbuffer
+sys-fs/zfs
+sys-kernel/dracut
+"
+
+src_prepare() {
+	default
+	hprefixify bin/*
+	if [[ -n ${BROOT} ]]; then
+		sed -e "s,#!/bin/sh,#!${BROOT}/bin/sh," \
+			-i install-tree.sh releng/version.sh || die
+	fi
+}
+
+src_compile() {
+	# There's a makefile in the source repo but it's only for install. There's
+	# nothing to compile since zfsbootmenu is all scripts.
+	true
+}
+
+src_install() {
+	emake DESTDIR="${ED}" EXAMPLES="/usr/share/doc/${PF}" install
+}
+
+pkg_postinst () {
+	elog "Please consult Gentoo wiki to configure the bootloader
+	https://wiki.gentoo.org/wiki/ZFS/rootfs#ZFSBootMenu"
+}