use maturin when possible; simplify setuptools_rust patch

python-orjson.spec

@@ -3,7 +3,10 @@
 # Copyright (c) 2023 Maxwell G <maxwell@gtmx.me>
 # Copyright (c) Fedora Project Authors
 
+# Specfile compatability: EPEL >= 9 or Fedora >= 37 and RPM >= 4.16
+
 %bcond tests 1
+%bcond maturin %[ 0%{?fedora} >= 39 ]
 
 Name:           python-orjson
 Version:        3.8.12
@@ -14,10 +17,12 @@ License:        Apache-2.0 OR MIT
 URL:            https://github.com/ijl/orjson
 Source:         %{pypi_source orjson}
 # Ineligble for upstreaming
-Patch:          Use-setuptools-rust-instead-of-maturin.patch
-# Ineligble for upstreaming
 Patch:          Remove-unstable-simd-feature.patch
 
+# Ineligble for upstreaming
+# Used when maturin bcond is disabled
+Patch5000:      Use-setuptools-rust-instead-of-maturin.patch
+
 BuildRequires:  python3-devel
 BuildRequires:  rust-packaging
 
@@ -63,24 +68,9 @@ License:        (Apache-2.0 OR MIT) AND (Apache-2.0 OR BSL-1.0) AND BSD-3-Clause
 
 
 %prep
-%autosetup -p1 -n orjson-%{version}
-
-# Replaces @@VERSION@@ placeholder in pyproject.toml with the value of %%version.
-%writevars -f pyproject.toml version
-
-%if 0%{?fedora} && 0%{?fedora} <= 36
-# Minimal setup.cfg for Fedora 36's old setuptools that doesn't support PEP 621
-# (i.e. it doesn't understand metadata in pyproject.toml's [project] table)
-cat <<EOF > setup.cfg
-[metadata]
-name = orjson
-version = %{version}
-
-[options]
-packages = orjson
-EOF
-sed -i 's|setuptools>=61.0|setuptools|' pyproject.toml
-%endif
+%autosetup -p1 -n orjson-%{version} -N
+%autopatch -M 4999
+%{!?with_maturin:%autopatch -m5000 -M5000 -p1}
 
 # Remove bundled yyjson.
 rm -rv include/yyjson/
@@ -120,6 +110,7 @@ export RUSTFLAGS='%{build_rustflags}'
 %changelog
 * Thu May 18 2023 Maxwell G <maxwell@gtmx.me> - 3.8.12-1
 - Update to 3.8.12.
+- Use maturin as a build system when available
 
 * Fri May 5 2023 Maxwell G <maxwell@gtmx.me> - 3.8.11-1
 - Update to 3.8.11. Fixes rhbz#2193468.