dev-vcs/jj: add 0.29.0

I didn't realize the `git.subprocess=false`
deprecation was coming -this- soon, or I'd have
started warning in 0.28.0 and dropped the USE
default in 0.29.0.

Instead, I'm leaving it default and warning, and
it'll be removed entirely next update.

Signed-off-by: Vivian Heisz (demize) <demize@unstable.systems>

dev-vcs/jj/jj-0.29.0.ebuild

@@ -0,0 +1,72 @@
+# Copyright 2024-2025 Gentoo Authors
+# Distributed under the terms of the GNU General Public License v2
+
+# Autogenerated by pycargoebuild 0.13.4
+
+EAPI=8
+
+inherit cargo
+
+DESCRIPTION="Jujutsu - an experimental version control system"
+HOMEPAGE="https://github.com/jj-vcs/jj"
+SRC_URI="
+	https://github.com/jj-vcs/jj/archive/refs/tags/v${PV}.tar.gz -> ${P}.tar.gz
+	https://files.demize.dev/gentoo/${CATEGORY}/${PN}/${P}-crates.tar.xz
+"
+
+LICENSE="Apache-2.0"
+# Dependent crate licenses
+LICENSE+="
+	Apache-2.0 BSD MIT MPL-2.0 Unicode-3.0 Unicode-DFS-2016 WTFPL-2 ZLIB
+"
+SLOT="0"
+KEYWORDS="~amd64 ~arm64"
+
+IUSE="
+	+git2
+"
+
+BDEPEND="
+	virtual/pkgconfig
+"
+DEPEND="
+	git2? (
+		>=dev-libs/libgit2-1.9.0:0/1.9
+		dev-libs/openssl:=
+		net-libs/libssh2:=
+	)
+"
+RDEPEND="
+	${DEPEND}
+	dev-vcs/git
+"
+
+QA_FLAGS_IGNORED="usr/bin/${PN}"
+
+pkg_setup() {
+	export LIBGIT2_NO_VENDOR=1
+	export LIBSSH2_SYS_USE_PKG_CONFIG=1
+	export OPENSSL_NO_VENDOR=1
+	export PKG_CONFIG_ALLOW_CROSS=1
+	rust_pkg_setup
+}
+
+src_configure() {
+	local myfeatures=(
+		$(usev git2)
+		watchman
+		git
+	)
+	cargo_src_configure --no-default-features
+}
+
+src_install() {
+	cargo_src_install --path cli
+}
+
+pkg_postinst() {
+	if use git2; then
+		ewarn "Support for USE=git2 has been deprecated and will be removed in jj 0.30."
+		ewarn "Please report any remaining issues you have with the subprocessing path."
+	fi
+}