sys-fs/erofs-utils: user-space utilities for erofs

New package, taken from https://bugs.gentoo.org/701284
Added metadata.xml.

Package-Manager: Portage-3.0.9, Repoman-3.0.2
Signed-off-by: Denis Reva <denis7774@gmail.com>

sys-fs/erofs-utils/Manifest

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+DIST erofs-utils-1.1.tar.gz 46133 BLAKE2B 24a2f16059e39bd65203f4a28721b8aad70599d6201ead02c291234de631bd3def1c403fa8b50b6dce4af3eea2768b912c4f56ad20c3c26db3853ba3174775ac SHA512 f300b536f0ba91a05a7eb3dc9a9ec402c98966ad7c0e1f2f664a650caaffce6c4433722374418c6d03e69ce2e74785e55f9bcc45e6717a8bc67e5352e450806b

sys-fs/erofs-utils/erofs-utils-1.1.ebuild

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+# Copyright 1999-2020 Gentoo Authors
+# Distributed under the terms of the GNU General Public License v2
+
+EAPI=7
+
+inherit autotools
+
+DESCRIPTION="Userspace tools for EROFS images"
+HOMEPAGE="https://git.kernel.org/pub/scm/linux/kernel/git/xiang/erofs-utils.git"
+SRC_URI="${HOMEPAGE}/snapshot/${P}.tar.gz"
+
+LICENSE="GPL-2+"
+SLOT="0"
+KEYWORDS="~amd64 ~arm ~arm64 ~ppc ~ppc64 ~riscv ~x86"
+IUSE="lz4 +uuid"
+
+RDEPEND="
+	lz4? ( >=app-arch/lz4-1.9 )
+	uuid? ( sys-apps/util-linux )
+"
+DEPEND="${RDEPEND}"
+BDEPEND="virtual/pkgconfig"
+
+src_prepare() {
+	default
+	eautoreconf
+}
+
+src_configure() {
+	econf \
+		$(use_enable lz4) \
+		$(use_with uuid)
+}

sys-fs/erofs-utils/metadata.xml

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+<?xml version="1.0" encoding="UTF-8"?>
+<!DOCTYPE pkgmetadata SYSTEM 'http://www.gentoo.org/dtd/metadata.dtd'>
+<pkgmetadata>
+	<maintainer type="person">
+		<email>denis7774@gmail.com</email>
+		<name>Denis Reva</name>
+		<description>Partial maintainer</description>
+	</maintainer>
+	<longdescription lang="en">
+		erofs-utils
+		===========
+		erofs-utils includes user-space tools for erofs filesystem images.
+		Currently only mkfs.erofs is available.
+		
+		Mkfs.erofs
+		----------
+		It can create 2 primary kinds of erofs images: (un)compressed.
+		- For compressed images, it's able to use several compression algorithms, but lz4(hc) are only supported due to the current linux kernel implementation.
+		- For uncompressed images, it can decide whether the last page of a file should be inlined or not properly [1].
+		How to generate erofs images
+		~~~~~~~~~~~~~~~~~~~~~~~~~~~~
+		Currently lz4 and lz4hc are available for compression, e.g.
+		$ mkfs.erofs -zlz4hc foo.erofs.img foo/
+		Or leave all files uncompressed as a option:
+		$ mkfs.erofs foo.erofs.img foo/
+		
+		Known issues
+		~~~~~~~~~~~~
+		1. LZ4HC cannot compress long zeroed buffer properly with
+		LZ4_compress_HC_destSize()
+		https://github.com/lz4/lz4/issues/784
+	</longdescription>
+	<use>
+		<flag name="uuid">Allow interaction with libuuid in sys-apps/util-linux. It's recommended turn on</flag>
+	</use>
+</pkgmetadata>