dev-python/uv-build: New package, v0.6.11

Add a hacky patched uv-build package that installs the upstream Python
modules without building another copy of uv.

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

dev-python/uv-build/Manifest

@@ -0,0 +1 @@
+DIST uv_build-0.6.11.tar.gz 292635 BLAKE2B 906d310f6884def53d4b739d0b2d246be4a2651b8add2ec94665128d9cd815830de9246ce5e7c1850842673d56c829547ebd1d707ca69984bbc15183f3ade0d8 SHA512 b68ff4c87b21bae1095ac622fdb4ed60610e44db9c73c0ae29c5566ee30ecdfee39a0c8a0659a70101c72dd04317de80f2ac7a377d2ad5a2c59fa4adabeb7c5b

dev-python/uv-build/files/uv-build-0.6.9-use-uv.patch

@@ -0,0 +1,18 @@
+diff --git a/python/uv_build/__init__.py b/python/uv_build/__init__.py
+index c8ce9c5..835ba0f 100644
+--- a/python/uv_build/__init__.py
++++ b/python/uv_build/__init__.py
+@@ -39,11 +39,11 @@ def call(
+ 
+     warn_config_settings(config_settings)
+     # Unlike `find_uv_bin`, this mechanism must work according to PEP 517
+-    uv_bin = shutil.which("uv-build")
++    uv_bin = shutil.which("uv")
+     if uv_bin is None:
+         raise RuntimeError("uv was not properly installed")
+     # Forward stderr, capture stdout for the filename
+-    result = subprocess.run([uv_bin, *args], stdout=subprocess.PIPE)
++    result = subprocess.run([uv_bin, "build-backend", *args], stdout=subprocess.PIPE)
+     if result.returncode != 0:
+         sys.exit(result.returncode)
+     # If there was extra stdout, forward it (there should not be extra stdout)

dev-python/uv-build/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="project">
+		<email>python@gentoo.org</email>
+	</maintainer>
+	<upstream>
+		<remote-id type="github">astral-sh/uv</remote-id>
+		<remote-id type="pypi">uv-build</remote-id>
+	</upstream>
+</pkgmetadata>

dev-python/uv-build/uv-build-0.6.11.ebuild

@@ -0,0 +1,45 @@
+# Copyright 2025 Gentoo Authors
+# Distributed under the terms of the GNU General Public License v2
+
+EAPI=8
+
+DISTUTILS_USE_PEP517=hatchling
+PYTHON_COMPAT=( pypy3 pypy3_11 python3_{10..13} )
+
+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"
+
+RDEPEND="
+	>=dev-python/uv-${PV}
+"
+
+src_prepare() {
+	local PATCHES=(
+		# use 'uv build-backend' instead of compiling uv-build executable
+		# that largely overlaps with dev-python/uv
+		"${FILESDIR}/${PN}-0.6.9-use-uv.patch"
+	)
+
+	distutils-r1_src_prepare
+
+	# replace the upstream build system since we don't want maturin
+	# to recompile uv again
+	sed -i -e '/^\[build-system\]$/,$d' pyproject.toml || die
+	cat >> pyproject.toml <<-EOF || die
+		[build-system]
+		requires = ["hatchling"]
+		build-backend = "hatchling.build"
+
+		[tool.hatch.build.targets.wheel]
+		packages = ["python/uv_build"]
+	EOF
+}