app-backup/snapper-rollback: new package, add 1.0.0

Signed-off-by: Keita Urashima <ursm@ursm.jp>

app-backup/snapper-rollback/Manifest

@@ -0,0 +1 @@
+DIST snapper-rollback-1.0.0.tar.gz 16926 BLAKE2B 51a8dae60ecf4c2badd9abfae810545f2b37b9d2d7f0f1f05330dce3687270c373ad3cc5507f56d22eb1cf32f3d582508a65993411e9081ef1e141b48e09e112 SHA512 8aa1052b1b552a0987885cdc4e52f1b351765a8e9ecdd13751c95e145781cd13d44f4c329dea55e84aeca92bb5918c15cc668bf83fe76d9c20a464a00482e1e0

app-backup/snapper-rollback/metadata.xml

@@ -0,0 +1,11 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<!DOCTYPE pkgmetadata SYSTEM "https://www.gentoo.org/dtd/metadata.dtd">
+<pkgmetadata>
+	<maintainer type="person">
+		<email>ursm@ursm.jp</email>
+		<name>Keita Urashima</name>
+	</maintainer>
+	<upstream>
+		<remote-id type="github">jrabinow/snapper-rollback</remote-id>
+	</upstream>
+</pkgmetadata>

app-backup/snapper-rollback/snapper-rollback-1.0.0.ebuild

@@ -0,0 +1,43 @@
+# Copyright 2026 Gentoo Authors
+# Distributed under the terms of the GNU General Public License v2
+
+EAPI=8
+
+PYTHON_COMPAT=( python3_{11..14} )
+
+inherit python-single-r1
+
+DESCRIPTION="Rollback to a snapper btrfs snapshot using the flat subvolume layout"
+HOMEPAGE="https://github.com/jrabinow/snapper-rollback"
+SRC_URI="https://github.com/jrabinow/${PN}/archive/refs/tags/v${PV}.tar.gz -> ${P}.tar.gz"
+
+LICENSE="GPL-3"
+SLOT="0"
+KEYWORDS="~amd64"
+
+REQUIRED_USE="${PYTHON_REQUIRED_USE}"
+
+RDEPEND="
+	${PYTHON_DEPS}
+	$(python_gen_cond_dep '
+		dev-python/btrfsutil[${PYTHON_USEDEP}]
+	')
+	app-backup/snapper
+"
+
+src_prepare() {
+	default
+
+	# python_fix_shebang cannot parse "env -S python3", so drop the -S flag.
+	sed -i -e '1s|/usr/bin/env -S python3|/usr/bin/env python3|' "${PN}.py" || die
+}
+
+src_install() {
+	newsbin "${PN}.py" "${PN}"
+	python_fix_shebang "${ED}/usr/sbin/${PN}"
+
+	insinto /etc
+	doins "${PN}.conf"
+
+	einstalldocs
+}