app-arch/gxz: new package, add 0.5.12

An alt xz implementation written in pure Go (with no deps too!).

Not abandoning the king xz-utils, but need this to do some comparison work.

Signed-off-by: Sam James <sam@gentoo.org>

app-arch/gxz/Manifest

@@ -0,0 +1 @@
+DIST gxz-0.5.12.tar.gz 4176087 BLAKE2B 0bf4795ec1d008ef956d42d9d78b3f3f65bb9555436c64869a82aa6c058ac3aa5e8912a8e451cdafccaeaf4d9bb30404e2cd60a00f620baf01e6b6d892d59a3f SHA512 13928dfbd8514eb7c778a84405ba2342159da8f59783f82b5774643190b12d5fc1aed927b67946d5ef246d5cc61b3be23eaa08695c61aea70229617b1ce757ff

app-arch/gxz/gxz-0.5.12.ebuild

@@ -0,0 +1,23 @@
+# Copyright 2024 Gentoo Authors
+# Distributed under the terms of the GNU General Public License v2
+
+EAPI=8
+
+inherit go-module
+
+DESCRIPTION="Pure golang package for reading and writing xz-compressed files"
+HOMEPAGE="https://github.com/ulikunitz/xz"
+SRC_URI="https://github.com/ulikunitz/xz/archive/v${PV}.tar.gz -> ${P}.tar.gz"
+S="${WORKDIR}"/xz-${PV}
+
+LICENSE="BSD"
+SLOT="0"
+KEYWORDS="~amd64"
+
+src_compile() {
+	ego build ./cmd/gxz
+}
+
+src_install() {
+	dobin gxz
+}

app-arch/gxz/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>sam@gentoo.org</email>
+		<name>Sam James</name>
+	</maintainer>
+	<upstream>
+		<remote-id type="github">ulikunitz/xz</remote-id>
+	</upstream>
+</pkgmetadata>