app-containers/distrobuilder: add 3.0

- looks like lxd compatibility has been written off for now. lxc and
   incus remains.

Signed-off-by: Joonas Niilola <juippis@gentoo.org>

app-containers/distrobuilder/Manifest

@@ -1,2 +1,4 @@
 DIST distrobuilder-2.1.tar.gz 5599048 BLAKE2B 90e82a20a3ef61d13148951956bb1f74cc3494ca86e339c188a1c9009dcb27c0cb9a298c639c6de891df67915b48d107557f6b698a45cbe35c54d41a45bac1ab SHA512 80184d27305f5659f1367563161220b966b1957810da61e8f3b9f32cf408795319b43dd650bc9f867b3ac73ef2b3251972bb11999d92feb34bfd9cdae7ff7b7b
 DIST distrobuilder-2.1.tar.gz.asc 833 BLAKE2B fb3aadbc989438b0606c88e74fdd86e809b6373b907b37372cbbc0ca99415821f61772205967e0a7aa26b0bdaceb66df4ab39da1f08c339edeb84e66a04aab56 SHA512 0220fa34d966e2b3a244af21a894f5db7556b891ee3205b605ef633699553f0f53d876412c855010a0ef685fcfe376997790cf51d59fd46b7c9ba539507de4e3
+DIST distrobuilder-3.0.tar.gz 6135124 BLAKE2B 71cf594cdece46890418ea58af06205c59beaecce46a977efadcb336b93f0e1ed85ba4c1563a1f9f95937e935f844c91b6e45dfc73c0210f134ba3a694adea1d SHA512 c2218e6312257e5f15077d8380b9b49f7b8afd7ed5e43d46ac5d18a8cc332b096ab50c7301f74eb93769548c10f273e21a584ab2e908260ead4d2b219683bd1c
+DIST distrobuilder-3.0.tar.gz.asc 833 BLAKE2B 9a6fba0101eaea411a1b56359265c02533739a180c095ef2edd07dbe65c1d3bd2c1deab46e0cfdab362a282b85843659c8876853252b7ab1ab49e9f3f3dc1e8f SHA512 238a0a93575cb05fcd13fc32b5faed7592ff3345ae91d07fc1ede5696903f2e4da3d6d79bf39bc05ac16f0c8e04afe3eefa0e96b2c789992f55859bac6fd56d0

app-containers/distrobuilder/distrobuilder-3.0.ebuild

@@ -0,0 +1,49 @@
+# Copyright 1999-2023 Gentoo Authors
+# Distributed under the terms of the GNU General Public License v2
+
+EAPI=8
+
+inherit go-module linux-info
+
+DESCRIPTION="System container image builder for LXC and incus"
+HOMEPAGE="https://linuxcontainers.org/distrobuilder/introduction/"
+
+SRC_URI="https://linuxcontainers.org/downloads/distrobuilder/distrobuilder-${PV}.tar.gz
+	verify-sig? ( https://linuxcontainers.org/downloads/distrobuilder/distrobuilder-${PV}.tar.gz.asc )"
+
+LICENSE="Apache-2.0"
+SLOT="0"
+KEYWORDS="~amd64 ~ppc64"
+IUSE="verify-sig"
+
+RDEPEND="app-crypt/gnupg
+	dev-util/debootstrap
+	dev-vcs/git
+	net-misc/rsync
+	sys-fs/squashfs-tools"
+BDEPEND="verify-sig? ( sec-keys/openpgp-keys-linuxcontainers )"
+
+# Test deps aren't vendored.
+RESTRICT="test"
+
+CONFIG_CHECK="~OVERLAY_FS"
+
+VERIFY_SIG_OPENPGP_KEY_PATH=/usr/share/openpgp-keys/linuxcontainers.asc
+
+GOPATH="${S}/_dist"
+
+src_compile() {
+	export GOPATH="${S}/_dist"
+	emake
+}
+
+src_test() {
+	export GOPATH="${S}/_dist"
+	emake check
+}
+
+src_install() {
+	export GOPATH="${S}/_dist"
+	dobin ${GOPATH}/bin/distrobuilder
+	dodoc -r doc/*
+}