dev-python/uv-build: Bump to 0.12.1

Signed-off-by: Michał Górny <mgorny@gentoo.org>

dev-python/uv-build/Manifest

@@ -5,3 +5,4 @@ DIST uv_build-0.11.29.tar.gz 411484 BLAKE2B 4a9250bd8ecb4967c222f5ed0842c6415963
 DIST uv_build-0.11.32.tar.gz 413653 BLAKE2B 8951cd4ddc44655a177c6cccbf81fe871306f1096161ea46cec8bf52b56de713b4d91c469e44913c140229ae61595cbdcbd5b2e0cbb7c791f7937c9fc9db898c SHA512 3732f141b2ffeaed8f08dadadb2b5e72c2d60e0cb9a13c7d6b7360471606afbaae88d841db655b79ca2753ef4e2e18dbb51464e6669c57aed98ee19219fa5b56
 DIST uv_build-0.11.33.tar.gz 413871 BLAKE2B 8a662d0a80fc32cc22b4fa4df5bf38338e715eaddc6316348ac56cb5411b2433e5b36fad545f90719d4a83e989bc29e55be2cfc40ecd60c4fc94d91fb7b0bc4b SHA512 30001c3c49959ae09243a947d9c02bc46e391bd2e055476ce89c489b15cde789091f2461fffea8ac298805fd944c98c60aabbb804b6e13875569e659c0d8c28b
 DIST uv_build-0.12.0.tar.gz 411983 BLAKE2B 3c6f6f32fa096d03426c63e001c86eed2d17b5a130fbc02a96271ca9073432393c4f9d14baa1c6d7993adadda88f0d45fd32e7c54d50669b3d54ef79c95314ff SHA512 719a2f6ae6c257a72d09e8f850cd217458e57162329adcbe7efcf59a0a62f83a6310e9da27d80ec9caf6bdf280eaee652b3267bd01955b9d22b7308f194c16d2
+DIST uv_build-0.12.1.tar.gz 412371 BLAKE2B b5eb43ce1af6d78dbb68b2445329b90520ac6e9269ff6711270763d43d09cdd3a66ac9cbeab4f52964feea3b0d08559c133cd2510f65403dbf678d7bae3e5588 SHA512 5dda5acdf4a665cbc59a24c657921c81a6a5622fef463da255df2372d48186aed56806311824ede70337f64e8dde797b82386fa4aa2ed11b82fb11047ec2ec67

dev-python/uv-build/uv-build-0.12.1.ebuild

@@ -0,0 +1,100 @@
+# Copyright 2025-2026 Gentoo Authors
+# Distributed under the terms of the GNU General Public License v2
+
+EAPI=8
+
+# Maturin compiles uv-build executable for every impl, we do not want
+# that, so we use another backend.  And since we use another backend,
+# why not dogfood it in the first place?
+DISTUTILS_USE_PEP517=standalone
+PYTHON_COMPAT=( python3_{12..15} )
+
+inherit distutils-r1 pypi
+
+DESCRIPTION="PEP517 uv build backend"
+HOMEPAGE="
+	https://github.com/astral-sh/uv/
+	https://pypi.org/project/uv-build/
+"
+
+LICENSE="|| ( Apache-2.0 MIT )"
+SLOT="0"
+KEYWORDS="~amd64 ~arm ~arm64 ~loong ~ppc ~ppc64 ~riscv ~s390 ~x86"
+IUSE="test"
+RESTRICT="!test? ( test )"
+
+RDEPEND="
+	>=dev-python/uv-${PV}
+"
+BDEPEND="
+	test? (
+		app-arch/unzip
+		dev-python/build[${PYTHON_USEDEP}]
+	)
+"
+
+src_prepare() {
+	distutils-r1_src_prepare
+
+	# use the executable from dev-python/uv instead of building
+	# a largely overlapping uv-build executable (at least for now)
+	sed -i -e '/USE_UV_EXECUTABLE/s:False:True:' python/uv_build/__init__.py || die
+
+	# replace the build-system section
+	sed -i -e '/\[build-system\]/,$d' pyproject.toml || die
+	cat >> pyproject.toml <<-EOF || die
+		[build-system]
+		requires = ["uv_build<9999"]
+		build-backend = "uv_build"
+		backend-path = ["src"]
+	EOF
+
+	# rename to make uv-build find it
+	mv python src || die
+}
+
+python_test() {
+	"${EPYTHON}" -m build -n || die "Self-build failed with ${EPYTHON}"
+
+	local zip_result=$(
+		unzip -t "dist/uv_build-${PV}-py3-none-any.whl" || die
+	)
+	local zip_expected="\
+Archive:  dist/uv_build-${PV}-py3-none-any.whl
+    testing: uv_build/                OK
+    testing: uv_build/__init__.py     OK
+    testing: uv_build/__main__.py     OK
+    testing: uv_build/py.typed        OK
+    testing: uv_build-${PV}.dist-info/   OK
+    testing: uv_build-${PV}.dist-info/WHEEL   OK
+    testing: uv_build-${PV}.dist-info/METADATA   OK
+    testing: uv_build-${PV}.dist-info/RECORD   OK
+No errors detected in compressed data of dist/uv_build-${PV}-py3-none-any.whl.\
+"
+	if [[ ${zip_result} != ${zip_expected} ]]; then
+		eerror ".zip result:\n${zip_result}"
+		eerror ".zip expected:\n${zip_expected}"
+		die ".whl result mismatch"
+	fi
+
+	local tar_result=$(
+		tar -tf "dist/uv_build-${PV}.tar.gz" || die
+	)
+	local tar_expected="\
+uv_build-${PV}/PKG-INFO
+uv_build-${PV}/pyproject.toml
+uv_build-${PV}/pyproject.toml.orig
+uv_build-${PV}/
+uv_build-${PV}/README.md
+uv_build-${PV}/src
+uv_build-${PV}/src/uv_build
+uv_build-${PV}/src/uv_build/__init__.py
+uv_build-${PV}/src/uv_build/__main__.py
+uv_build-${PV}/src/uv_build/py.typed\
+"
+	if [[ ${tar_result} != ${tar_expected} ]]; then
+		eerror ".tar.gz result:\n${tar_result}"
+		eerror ".tar.gz expected:\n${tar_expected}"
+		die ".tar.gz result mismatch"
+	fi
+}