app-text/lowdown-nix: add 1.3.0

Changes: https://github.com/kristapsdz/lowdown/releases/tag/VERSION_1_3_0

app-text/lowdown-nix/Manifest

@@ -1,3 +1,4 @@
 DIST lowdown-1.1.0.tar.gz 599219 BLAKE2B f623399cb41c5eaf180550283c5b2738993563ff30be4cfa1a471df036ed4289057d3f886a7727d85283896fbfe1316e9cc86d32c629cea1fd775af16cf58839 SHA512 b7b788694abf6760ca4abbd8d5d2c226d5406067ebf9b55307f136e1ab373e517fb20187659c09029463872310a5b39a0129842d1bc6b7bd64f2d440390e2676
 DIST lowdown-1.1.1.tar.gz 600635 BLAKE2B 39c0a2472ff6b9b3fa2b6d72c1f2d482592976f7b50c1bbaf1965bfbb6d28f22e0a7498bb54087bb83070bd74ea673409be97815f51a0a5a67e980bbfc4e01b2 SHA512 2a69da945a83696480651e8221d73bcb18bac9bc38bb88126ddf73520d2a4ff396dde08a7abf6f550669ec9ba34abdaa186b0980f312fa157371ee754576bb6a
 DIST lowdown-1.2.0.tar.gz 657032 BLAKE2B 73b3bfc1b09bc6beb38949a344e5b458f8a1537a99ce48710d170f0553c099d0226b6082923b01c02971d3f82c9773ae95e8792f56ccf0d530708aecab480766 SHA512 ed989e12f1bd6da03cbf139bfe0fb0100fbe23cac266990bb1bc34a3e0be3d4512e1ab1da2397c439d20dc40dd7daa4fc4318116ef2b5e759368e9a28e483744
+DIST lowdown-1.3.0.tar.gz 666560 BLAKE2B 8bf9da6163a65bff7ac5774d0d31a0dc1438832944b2560a9f725bf9c83c359575fdb828d5065a0138e84466c9a95ca514c72cba6c457a0bb02f9e4558cce017 SHA512 ac51e8ff74450bf02d3c8e41f129f15f2ac92d47a07c020f10eea143b506fd113afac0e9bec447c336cf70176ebc886a8933fa38f5779931c9dfd9c06421fcda

app-text/lowdown-nix/lowdown-nix-1.3.0.ebuild

@@ -0,0 +1,52 @@
+# Copyright 2021 Gentoo Authors
+# Distributed under the terms of the GNU General Public License v2
+
+# ::nix-guix note: we fork app-text/lowdown::gentoo version because it
+# has a hard time providing working library. A bit of past failed
+# attempts:
+# - https://bugs.gentoo.org/811111
+# - https://bugs.gentoo.org/832590
+# - https://bugs.gentoo.org/832797
+# and is still broken in app-text/lowdown-0.11.1-r1 (missing liblowdown.so)
+#
+# To peacefully coexist with app-text/lowdown we install everything into a prefix.
+
+EAPI=8
+
+inherit toolchain-funcs
+
+MY_PV="VERSION_${PV//./_}"
+DESCRIPTION="Markdown translator producing HTML5, roff documents in the ms and man formats"
+HOMEPAGE="https://kristaps.bsd.lv/lowdown/"
+SRC_URI="https://github.com/kristapsdz/lowdown/archive/refs/tags/${MY_PV}.tar.gz -> lowdown-${PV}.tar.gz"
+S="${WORKDIR}/lowdown-${MY_PV}"
+
+LICENSE="ISC"
+SLOT="0"
+KEYWORDS="~amd64 ~x86"
+
+# By default portage runs 'strip -g' on .a files.
+# This is known to break liblowdown.a when it's built with -flto:
+#   https://github.com/trofi/nix-guix-gentoo/issues/19
+# Chances are it's a toolchain bug (or a limitation of LTO):
+#   https://gcc.gnu.org/PR105877
+RESTRICT=strip
+
+DEPEND="
+	app-crypt/libmd:=
+	virtual/libcrypt:=
+"
+RDEPEND="${DEPEND}"
+
+src_configure() {
+	CC="$(tc-getCC)" \
+		./configure \
+			PREFIX="${EPREFIX}"/usr/$(get_libdir)/lowdown-nix \
+			|| die "./configure failed"
+}
+
+src_install() {
+	default
+	# install static libraries for sys-apps/nix
+	emake DESTDIR="${D}" install_static
+}